Titanium alloy deep hole thread processing technology

It is difficult to process deep hole threads of special material parts. For example, deep hole tapping on titanium alloy parts is very challenging. The scrapping of parts is very uneconomical due to the scraping effect caused by the break of the tap. Therefore, in order to avoid scratches, the correct tools and tapping techniques must be used.

Machining deep hole threads mean long-term contact between the tool and the workpiece. At the same time, more cutting heat and cutting force will be generated during the machining process. Therefore, when tapping small deep holes of special materials (such as titanium parts), tool damage and thread inconsistencies are likely to occur.

In order to solve this problem, two methods can be used: (1) increase the hole diameter before tapping; (2) use a tap specially designed for deep hole tapping.

The proper bottom hole is very important for thread processing. The larger threaded bottom hole can effectively reduce the cutting heat and cutting force during the tapping process. But it also reduces the thread contact rate.

The diameter increment of the threaded bottom hole mainly depends on the required thread contact rate and the number of thread heads per inch. Based on the above two values, the correct diameter of the threaded bottom hole can be calculated using the empirical formula.

Due to the difficulty of machining titanium parts, the cutting parameters and tool geometry must be fully utilized

Because titanium alloys have greater elasticity and deformation rate, a relatively small cutting speed is required. When machining small holes in titanium alloy parts, the recommended cutting speed is 10-14 inches per minute. We do not recommend using a lower speed because it will cause the workpiece to become hard during cold working. In addition, pay attention to the cutting heat caused by tool breakage.
Gr5 Ti-6Al-4V Titanium Bar     Gr2 Pure Titanium Wire     ERTi-1 Pure Titanium Welding Wire     Gr23 Ti-6Al-4V ELI Titanium Tube

Use of titanium elbow

In the construction of various waterways and water pipes, we will use titanium alloy pipe elbows. What matters should we pay attention to when using titanium alloy elbows?

Titanium alloy pipe elbows have produced serious results and values ​​in equipment use, and have outstanding operating operations in certain environments and media.

According to the requirements of the workpiece and the surface condition, the titanium standard parts are received by alkali washing, water-soluble detergent, chlorine solvent sandblasting, shot blasting and other methods.

The titanium pipe elbow should be equipped with stable sealing performance to prevent the appearance of leakage and affect the normal operation of the pipe.

When the titanium alloy pipe elbow is equipped, the titanium alloy pipe elbow can be directly equipped on the pipeline according to the connecting steps, according to the application direction. Under normal circumstances, it can be equipped in the pipeline at any position, but it needs easy-to-operate inspection. The medium flow direction of the titanium alloy pipe elbow should be under the vertical valve and flow upward. The titanium alloy pipe elbow can only be equipped horizontally.
Gr2 Pure Titanium Foil     Gr9 Ti-3Al-2.5V Titanium Sheet     Gr5 Ti-6Al-4V Titanium Plate     Gr23 Ti-6Al-4V ELI Titanium Sheet

The production process and welding quality of the titanium plate determine the quality of the titanium plate

A significant feature of the titanium plate is its strong corrosion resistance. This is because it has a particularly strong affinity for oxygen and can form a dense oxide film on its surface, which can protect titanium from corrosion by the medium. , Neutral saltwater solution has good stability in the oxidizing medium and has better corrosion resistance than existing stainless steel and other commonly used non-ferrous metals.

The quality of the titanium plate is largely determined by the smelting process of the titanium plate manufacturer, including the chemical composition of the titanium, the cleanliness of the titanium water (gas, harmful elements, inclusions) and the quality of the casting billet (component segregation, decarburization and Its surface condition), these aspects are the key control points of smelting operations.

In addition, industrial titanium plates also require sufficient hardenability to ensure uniform microstructure and mechanical properties across the spring section. The main cause of fatigue cracks in the oxide inclusions in titanium and the damage of type D inclusions to fatigue life is greater than that of type B inclusions. Therefore, foreign titanium factories and automobile factories have put forward higher requirements for the oxide inclusions in industrial titanium plates. For example, the Swedish SKF standard requires that the oxygen content in titanium is lower than 15-10-6, and the type D inclusions are lower than the type B inclusions. Things. In particular, Al2O3 and TiN inclusions are extremely harmful to the fatigue life of titanium springs. In order to produce high-quality industrial titanium plates, special smelting methods such as electric furnace-electro slag remelting or vacuum arc remelting are usually used in the past.

Because the titanium plate and titanium rod have special physical and chemical properties, their welding process is very different from other metals. Titanium welding is a TiG welding process that effectively protects the welding area by inert argon gas. Before using argon gas, check the factory certificate on the bottle body to verify the purity index of the argon gas, and then check whether the bottle valve leaks Or failure phenomenon.

When welding titanium plates and rods, you must ensure:

The metal in the welding zone is not polluted by the active gas NOH and harmful impurity elements CFeMn above 250℃. The purity shall not be less than 99.98%, and the water content shall be less than 50Mg/m32. Argon: industrially superior pure argon.

Can not form coarse grain structure. The welding process must be in accordance with the predetermined construction sequence, and can not produce large welding residual stress and residual deformation. so. Strictly follow the process of quality management standards and implement the whole process of quality control. All factors of human, machine, material and method are in a good controlled state, so as to ensure the welding quality of titanium pipe within a reasonable period of time.
Titanium Clad Copper Plate     Titanium Threaded Bar      Titanium U-Tube For Heat Exchanger     ASTM F67 Gr2 Titanium Plate

Pure titanium and titanium alloys are made into many daily necessities

Titanium alloy is the only metal that has the least damage to the human body, precisely because it has the least damage to the human body, and is then used as a raw material for implants such as human joints and bones. Japan invented a high-tech toothbrush in 2005. It has a built-in metal titanium tube that absorbs light and produces negative ions. There is no need to add toothpaste to the brush head and remove stubborn cigarettes and coffee to allow users to keep their teeth for a long time. White, fresh breath. This environmentally friendly toothbrush is named as clinically tested and proved that its cleaning effect is better than ordinary toothbrushes and electric toothbrushes. The key lies in the titanium rod that connects the toothbrush shaft and the brush head. It can convert light into negative ion energy. When the toothbrush is in contact with the tooth, the negative ions attract positive ions, and the tartar and stains collapse at the molecular level. You don’t need to rinse your mouth after use. It can be replaced. The extra-fine brush head ensures deep penetration into each tooth. This experiment proved that using this high-tech can effectively remove bacteria and stains in the oral cavity, reduce gum bleeding and allergies, and reduce the chance of gingivitis. The excellent biocompatibility of titanium is completely non-toxic, harmless, and non-allergic to the human body. After its appearance is treated by anodizing, the oxide film formed is antibacterial, not only light, high strength, corrosion resistance, and easy to high-temperature disinfection. , And then titanium alloys are made into many titanium daily necessities.

The surface of pure titanium products has a dense oxide film, which can be well adapted to various environments at room temperature. Therefore, the pure titanium kettle has strong corrosion resistance without spraying. Facing the outdoor environment with weak acid or alkali, the pure titanium kettle can deal with it freely. Whether it is river water or rain, mountains, rocks or vegetation, the pure titanium kettle can directly contact with it without being corroded. Since the whole body of the kettle is not painted, the kettle presents the unique gray color of pure titanium products, and it can also be heated directly on the fire source into a colorful color. The bright color of the titanium kettle The surface of metallic titanium is covered with a very thin naturally occurring oxide film (titanium and oxide TiO2). This layer of film can also become titanium rust, because a transparent film with high refractive index is formed on its surface, and the film acts as a prism. After the light is refracted and absorbed by light of different wavelengths, the color can be seen, and if this If the thickness of the layer oxide film is manually adjusted to 8~10cm, it can show thousands of similar colors depending on the wavelength. Because this film is a transparent film with high refractive index, it can show colorful colors.
titanium rod     Medical Grade Titanium Wire     titanium welded tubing     titanium rolling plate

What industry uses raw materials such as titanium plates and titanium rods?

Passive titanium and titanium-based alloys are new structural materials, mainly used in the aerospace industry and marine industry.

The main uses of titanium plates: electronics, chemicals, watches, glasses, jewelry, sporting goods, mechanical equipment, electroplating equipment, environmental protection equipment, golf and precision processing industries.

The main uses of titanium wire: military industry, medical, sporting goods, glasses, earrings, headwear, electroplating hangers, welding wire and other industries.

The main uses of titanium tubes: environmental protection equipment, cooling tubes, titanium heating tubes, electroplating equipment, rings and various precision electrical appliances.

The main purpose of titanium rods: mainly used in mechanical equipment, electroplating equipment, medical, various precision parts and other industries.
AMS 4928 Titanium Alloy Bar     titanium straight wire     titanium tig welding wire     titanium pure powder

Industrial pure titanium is graded according to the content of impurity elements

Titanium has many obvious superior characteristics: low density (4.5kg/m3), high melting point (1660°C), strong corrosion-resistance, high specific strength, good plasticity, and high mechanical properties can also be produced by alloying and heat treatment. The various alloys are ideal structural materials for aerospace engineering. Α-phase titanium-containing a certain amount of oxygen, nitrogen, carbon, silicon, iron and other element impurities. It has excellent stamping process performance, good welding performance, insensitive to heat treatment and structure type, and has a certain strength under satisfactory plastic conditions.

Industrial pure titanium is graded according to the content of impurity elements. Its strength mainly depends on the content of interstitial elements oxygen and nitrogen. It has high corrosion resistance in seawater but is poor in inorganic acids. It is generally used to manufacture various sheet parts or forgings that work at a temperature of -253 to 350°C and does not bear much force. It can also manufacture rivet wires and pipes. Application examples: In addition to the use of industrial pure titanium to make parts, titanium alloys are widely used in the industry. It has been widely used in aviation, aerospace, chemical, shipbuilding and other industrial sectors, manufacturing gas turbine components, making biomaterials such as prostheses.
grade 5 titanium bar     Grade 12 Titanium Wire     titanium square pipe     6al4v titanium sheet

Titanium alloy is more suitable for spacecraft manufacturing than steel

Aerospace vehicles work under extreme conditions such as ultra-high temperature, ultra-low temperature, high vacuum, high stress, and strong corrosion. In addition to relying on excellent structural design, they also rely on the excellent characteristics and functions of the materials. Titanium alloy combines the characteristics required by aerospace products and is known as "cosmic metal" and "space metal". Titanium alloy has become an ideal manufacturing material for aircraft and engines due to its high strength, good mechanical properties and good corrosion resistance, but its poor machinability has restricted its application for a long time. With the development of processing technology, in recent years, titanium alloys have been widely used in the manufacture of parts such as the compressor section of aircraft engines, engine hoods, exhaust devices and the manufacture of structural frame parts such as aircraft girder frames.

Compared with general alloy steel, titanium alloy has the following advantages: higher specific strength: the density of titanium alloy is only 4.5g/cm3, which is much smaller than iron, and its strength is similar to that of ordinary carbon steel. Good mechanical properties: Titanium alloy has a melting point of 1660°C, which is higher than iron, and has higher thermal strength. It can work below 550°C and usually shows better toughness at low temperatures. Good corrosion resistance: A dense oxide film is easy to form on the surface of titanium alloy below 550℃, so it is not easy to be further oxidized. It has high corrosion resistance to the atmosphere, seawater, steam, and some acids, alkalis, and salt media.

High-temperature titanium alloys: The research and development of supersonic cruise bombs, hypersonic cruise bombs, reusable vehicles, and suborbital reusable transatmospheric vehicles require titanium alloys to be used at high temperatures of 600°C and above, which requires Titanium alloys must have excellent high-temperature resistance. The first high-temperature titanium alloy in the world is Ti6Al4V developed by the United States, which can be used at 300～350℃. Ti6Al4V alloy has both α + β two-phase characteristics and is widely used in the aerospace field. In order to maximize the effect of Al solid solution heat strengthening, Sn, Zr, Mo and Si are also added to the titanium alloy, and alloys such as IMI679 and Ti6242 with a use temperature of 450 ℃ have been developed successively, and IMI685, Ti6242S and other alloys using IMI834, Ti1100, BT36 and other alloys at a temperature of 550-600°C.

Low-temperature titanium alloys: With the rapid development of space technology, the application of titanium alloys in low-temperature and extremely low-temperature environments has increased, and the development of low-temperature titanium alloys is extremely important. Research has found that reducing the content of interstitial elements such as H, O, N and Al can improve the low-temperature performance of titanium alloys, so that they can be used for a long time under a 20K temperature environment.
Grade 23 Titanium Bar     grade 5 titanium wire     titanium tube grade 9     Grade 12 Titanium Plate

The development status of titanium in the bicycle industry in recent years

Bicycle components refer to the crankshaft positioner, pedals, handlebars, etc. connected to the frame. The titanium component industry is developing faster than the Ti-3AL-2.5V frame industry, and most of the components are produced with Ti-6Al-4V, Most of the parts are machined from bars or plates. The purchasing power of Ti-6A1-4V for parts is only 1/3 of that of Ti-3 gusset 2.5V frame, about 10t in 1997. Casting parts can become more and more common, but the development in this area may be slower than the development of machined parts. Titanium suppliers start to provide titanium parts manufacturers with cheap materials. Most of these low-cost bicycle-grade materials are actually Obsolete aviation materials.

The material requirements of the bicycle frame are very simple, but the driving characteristics are particularly critical, which complicates the selection of materials in some aspects. Most transportation vehicles, structural elements and internal facilities and operating elements are separated. Until recently, all bicycles The frame requires structural integrity and suspension function. There is no titanium alloy specially designed for bicycles. Only some materials have been improved for bicycles. Most people consider cost reduction issues and accept titanium components. The main problem is rigidity rather than cost. Ti-3Al-2.5V is the most commonly used titanium alloy for bicycles. Although it is developed for aircraft hydraulic systems, it is due to formability and corrosion resistance. The high fatigue strength to weight ratio and good elongation makes it meet the bicycle market performance standards. Compared with other titanium alloys, the biggest advantage of Ti-3Al-2.5V is the yield strength and easy tube forming. The disadvantage is its price and mold. The ratio of volume to density is poor. It is not easy to extrude Ti-3Al-2.5V as the dominant frame material. Ti-6AI-4V also has a certain attraction, and its modulus and strength are better than Ti- 3Al-2.5V is higher, but it is difficult to process into a tube with a small diameter like a bicycle frame. Ti-15V-3Al-6Cr-4Mo-4Zr is also easy to shape, but its higher density and lower modulus offset its strength The improved advantages.
Grade 7 Titanium Bar     titanium alloy tube     thin titanium plate     titanium block

Development characteristics of titanium alloy materials and titanium product processing technology

Due to the high manufacturing cost of titanium alloys, in order to reduce costs, the competitiveness of titanium alloys in the entire metal material market has been improved at a lower price. It is generally believed that titanium has incomparable superior performance compared to other materials, but the price of titanium often discourages consumers (especially car manufacturers). The emergence of high-quality, low-cost titanium alloys will certainly help the popularization and application of titanium and titanium alloys.

Judging from the application status at home and abroad and the development of titanium processing technology, the plastic processing technology of titanium and titanium alloys will develop in the following directions in the future:

1) High performance, that is, the development of alloys with higher service temperature, higher specific strength, higher specific modulus, better corrosion resistance and wear resistance.

2) Multi-function, namely the development of titanium alloys with various special functions and uses, such as high damping, low expansion, constant resistance, high resistance, resistance to electrolytic passivation and hydrogen storage, shape memory, superconductivity, low modulus biomedical And other titanium alloys, and further expand the application of titanium and titanium alloys.

3) Deepen the research of traditional alloys, improve the practical performance of existing alloys, and expand the application range of traditional alloys through the improvement of equipment and processes.

4) Adopt advanced processing technology and large-scale continuous processing equipment to develop continuous processing technology, direct rolling technology, cold forming technology and near-net forming technology to improve the production efficiency, yield and product performance of titanium alloys.

5) Reduce costs, develop alloys that contain no or almost no precious metal elements, and add cheap elements such as iron, oxygen and nitrogen, and develop titanium alloys that are easy to process and shape, easy to cut, and have cheap alloy elements and master alloys. Develop titanium alloys and use banned materials to increase the recovery rate and utilization rate of banned titanium. This is particularly important for reducing the cost of civilian titanium alloys.

6) Use advanced computer technology to simulate the deformation and processing of the workpiece, predict the evolution of the metal microstructure, and even predict the mechanical properties of the product (yield strength, tensile strength, elongation, hardness, etc.). ), and design or improve molds and tooling; analyze and process test results, reduce test volume, improve work efficiency, and reduce development costs.
machined titanium round rod     titanium foil grade 5     Ti 15333 Titanium Strip     titanium hexagon rod

Application of titanium plate in medicine

There have been successful cases in the application of titanium plates in the medical field. Titanium is a metal that is compatible with the human body. Titanium will be more and more widely used in the medical field in the future.

Among surgical implant materials, titanium and titanium alloy materials have become artificial joints, bone trauma products (titanium intramedullary nails, titanium plates, titanium screws, etc.), spinal orthopedic internal fixation systems, dental implants, Dental trays, orthodontic wires, artificial heart valves, interventional cardiovascular stents and other medical implant products are the materials of choice.

Compared with traditional treatment methods such as small titanium plate, titanium wire internal fixation, single jaw ligation, intermaxillary traction, a titanium plate in the treatment of maxillofacial fractures, it has the advantages of simple operation, small damage, precise and reliable In addition to the condyle and zygomatic arch fractures, an extraoral incision is required. For other mandibular fractures, intraoral incisions are often used. There is no scar on the face and can avoid damage to the facial nerve.

The problem of intermaxillary traction during titanium plate internal fixation. We believe that intraoperative intermaxillary traction can provide the correct reduction of the fracture end and a good occlusal relationship, and it can also prevent drilling. When the titanium screw is installed, the fracture segment will be displaced again. The occlusal relationship is disordered. Except for the cases of combined mandibular fractures, which need to be assisted for about 1 week after internal fixation, traction and fixation are generally not required after other fracture fixation. Because of the short traction time, it is very difficult for patients. The temporomandibular joint has little effect on the function, easy to maintain oral hygiene, can eat, is conducive to nutrition and wound healing of patients, and at the same time greatly reduces the pain of patients compared with the past.
Ti 6Al-2Sn-4Zr-6Mo Titanium Rod     titanium flat bar     titanium alloy rod     titanium flat rod

What are the chemical element classifications of titanium tubes

Titanium tube is an allotrope with a melting point of 1720°C. When it is lower than 882°C, it has a close-packed hexagonal lattice structure, called α titanium; above 882°C, it has a body-centred cubic lattice structure, called β titanium. Using the different characteristics of the above two structures of the titanium tube, adding appropriate alloying elements to gradually change the phase transformation temperature and phase content to obtain titanium alloys with different structures. At room temperature, titanium alloys have three matrix structures, and titanium alloys are divided into the following three categories: α alloys, (α+β) alloys and β alloys.

Titanium tube is a single-phase alloy composed of α-phase solid solution. It is α-phase no matter at normal temperature or at higher practical application temperature, with stable structure, higher wear resistance than pure titanium, and strong oxidation resistance. At a temperature of 500°C to 600°C, it still maintains its strength and creep resistance, but cannot be strengthened by heat treatment, and its room temperature strength is not high. It is a single-phase alloy composed of β-phase solid solution. It has a high strength without heat treatment. After quenching and aging, the alloy is further strengthened. The room temperature strength can reach 1372 ~ 1666 MPa, but the thermal stability is poor and it is not suitable for use at high temperatures.
grade 5 titanium sheet     titanium rivet     titanium exhaust tube     Grade 23 Titanium Tube

The influence of alloy elements in titanium plate and tube on welding performance

The welding seam and heat-affected zone have a high temperature after welding, and the cooling rate is very fast under the influence of the surrounding base material. Therefore, after fusion welding of titanium plate and titanium tube, it is easy to produce metastable structures such as martensite a', a", quenched ω phase and metastable β. In alloys with a small content of β stable elements, thick needles Martensitic structure will reduce plasticity. Quenching omega phases in alloys with more β-stabilizing elements will cause weld embrittlement. These meta-stable structures also have an adverse effect on welding performance. Use reasonable welding specifications and welding The post-heat treatment system can reduce or even eliminate this effect.

The composition of the alloy has a great influence on the welding performance. When welding with a welding wire with a high content of β-stabilizing elements, compared with the base metal, the plasticity reduction of the weld is generally more severe than that of the less β-stabilizing element. As their strengthening ability increases, the more serious the reduction in plasticity, the lower the welding performance. Generally speaking, the weldability of a-type titanium plate is better, but the tendency to generate pores and cold cracks is greater; the weldability of a+β-type titanium plate is slightly worse, and it becomes better with the decrease of β-stabilizing element content; The thermally stable β-type titanium tube has better overall performance without heat treatment after welding. Heat-treatable beta alloys tend to have a sharp decline in plasticity after aging of the weld, and it is difficult to obtain good comprehensive properties.

In summary, in order to obtain high-quality welded joints in titanium plates and tubes, the following points must be paid attention to:

(1) Strictly control the harmful impurities in the base metal and welding materials (including filler materials and oxygen-free flux), especially the content of interstitial elements such as hydrogen, oxygen, nitrogen, and carbon. Strictly clean the workpiece, welding materials and equipment before welding;

(2) Use high-purity inert gas, oxygen-free flux or vacuum conditions to protect the weld and heat-affected zone so that it will not be contaminated by gas during welding and cooling;

(3) Use welding specifications with low heat input as much as possible to reduce the tendency of a metal to overheat; for different alloys, choose a suitable post-weld heat treatment system to adjust the structure and mechanical properties of the weld and heat-affected zone.
Grade 7 Titanium Sheet     Titanium Wing Nut     titanium seamless tube     Grade 7 Titanium Tube