How to deal with surface problems with titanium wire mesh

Titanium wire mesh is difficult to be corroded due to its special metallographic arrangement and surface passivation film, making it difficult to chemically react with the medium under normal conditions, but it is not impossible to be corroded under any conditions. Titanium wire processing is in the presence of corrosive media and inducements (such as scratches, splashes, cutting slag, etc.). Titanium mesh can also be corroded by slow chemical and electrochemical reactions with corrosive media.

And under certain conditions, the corrosion rate is appropriately fast and rust phenomenon occurs, especially pitting corrosion and crevice corrosion. Therefore, during the processing operation of the titanium wire mesh, all useful methods should be adopted to prevent the corrosion conditions and inducements. happened. In fact, many rust conditions and inducements (such as scratches, splashes, cutting slag, etc.) also have obvious adverse effects on the appearance quality of titanium wire mesh, and should and must be overcome.

How to deal with the appearance of titanium wire mesh? Commonly used titanium wire mesh surface treatment skills have the following treatment methods: Titanium wire mesh surface natural whitening treatment: during the processing of titanium mesh, black oxidation occurs through coiling, binding, welding, or artificial surface fire heating. Skin. However, this method is expensive, pollutes the environment, harmful to the human body, and highly corrosive, and is gradually being screened.

Titanium wire mesh surface mirror bright treatment method: according to the messiness of titanium mesh products and user requirements, mechanical polishing, chemical polishing, electrochemical polishing and other methods can be selected to achieve the mirror luster. Gr5 Ti-6Al-4V Titanium Wire surface color treatment: titanium mesh The color not only imparts various colors to the titanium mesh products, but also adds the variety of colors to the products, and improves the wear resistance and corrosion resistance of the products.

How many methods are commonly used for cutting?

Before the titanium plate is processed into shape, the material must be cut first. Titanium plate blanking also adopts conventional sawing, milling, punching and shearing methods. Due to the high strength of Ultra-Thin Titanium Alloy Sheet, it is different from aluminum alloy blanking.

Band saw. Band saw processing efficiency is high, production preparation is convenient, but it is not suitable for processing too thin materials. It is often used for cutting titanium plates with a thickness of more than 3 mm. This method does not produce edge cracks. The disadvantage is that there are burrs, which must be polished after cutting. At present, it is mostly used for trimming, trimming and end trimming processes.

Band saw cutting can be divided into three categories: friction type, semi-friction type and ordinary band saw. When the friction band saw is working, due to the high linear speed, severe friction occurs between the saw blade and the workpiece, and the temperature in the cutting zone is very high, thus reducing the cutting resistance of the material, improving the machinability and high efficiency.

The belt used for sawing titanium should have a rigid structure and have enough power to maintain a constant speed during sawing; it should be able to feed automatically, tension the band saw and provide sufficient coolant. With ordinary high-speed steel band saws, the edge can be maintained and stable results can be obtained. Saw blades with tungsten carbide blades are used for cutting particularly thick materials, which can reduce the height of burrs and the depth affected by heat.

Milling. Use a milling cutter to mill a stack of Grade 5 Ti-6Al-4V Titanium Sheets to the desired shape, and the milling head moves along the milling template, or use a large CNC sheet metal milling machine for automatic milling. For stretched edges such as concave curves or flanging, the waist is polished before forming to prevent cracks.

Cut. Manufacturing straight-line shape wool or parts can be cut on the gantry shearing machine. If an ordinary shearing machine is used, carefully check whether the equipment can shear the titanium plate. Titanium alloy plates with a thickness of less than 35 mm can already be cut to the required size under production conditions. If necessary measures are taken to avoid slipping during cutting, thicker plates can also be cut. In order to prevent slippage, a higher clamping pressure is required. On the edge of the sheared titanium plate, especially for thicker titanium plates, the linear deviation is 0.25-0.50 mm. This deviation is usually caused by insufficient shear blade rigidity. Switching to a thicker blade can sometimes overcome this defect. If you modify the stopper device, and use digital display, fine-tuning and other technologies, the cutting accuracy can also be improved. The crack depth on the edge of the titanium plate does not exceed 0.4 mm, which can be removed by grinding wheel grinding and filing. If the shearing will cause cracks in the key parts of the part, a cutting method such as a band saw should be considered. When cutting materials with gantry shears, the minimum gap between the single sides of the scissors is 2-3% of the material thickness, the cutting angle is 75°-85°, the relief angle is 2°-3°, and the inclination angle of the blade on the oblique blade shearing bed is 2 degrees-5 degrees.

Ordinary rolling shear equipment can also be used for cutting. Circular shears can cut contour lines with a large radius of curvature (the minimum radius is about 250 mm). This method is used for titanium plates with a thickness of less than 2.5 mm. The current vibrating shears are only suitable for cutting titanium plates with a thickness of about 2 mm, and the edges of the cut wool must be filed or ground, leaving a file repair margin of more than 0.25 mm. For thin materials (thickness <0.8 mm), when the quantity is not large, you can also use lever type manual shears or hand-cut materials.

Die cut. Generally, the wool material of the required shape is punched out on the punching machine at one time. Generally, for wool with a simple shape, the maximum blanking thickness is about 3 mm. The titanium plate blanking die should have sufficient rigidity, and the upper and lower die should be kept in an accurate relative position with guide posts. When manufacturing various flat parts or various shapes of wool, the minimum size of the punching hole of the titanium plate and the minimum radius of the connecting edge of the punching parts should meet the requirements.

In addition, you can also use a punching and shearing machine to cut the material. When processing pure titanium plates, use a small die to punch out crescent-shaped incisions according to the template and connect them, so as to cut out the burrs of the parts, and then repair the key edges. The edge quality and accuracy are not as good as the die. Blanking is not efficient. The advantage of punching and shearing processing is that the production preparation cycle is short, and it is often used for small batch production.

What are the magical uses of titanium wire

The performance of titanium is so excellent, the role of titanium and titanium products has become more extensive. Our most common titanium products are titanium plates, titanium rods, titanium standard parts, titanium dioxide, and even titanium wires. With the continuous research and development of titanium, the application fields of titanium are becoming more and more extensive, and there are more and more titanium and titanium alloys and various titanium products. The following titanium wire manufacturers will take you to see what are the classification and uses of titanium wire.

Titanium wire can generally be divided into surgical medical titanium wire and titanium alloy titanium wire according to whether the raw material is pure titanium or titanium alloy; it can also be divided into α titanium alloy and near α type alloy according to different composition of titanium alloy, (α+β ) Type alloy, near β type alloy and β type alloy. It can also be classified according to the different properties of titanium wires, and can also be classified according to others, but other titanium spring wire are classified according to less, and specific adjustments can be made according to the parameters of each industry.

The basic characteristics of titanium, corrosion resistance, high hardness, no magnetism, high temperature resistance, low temperature, etc., these series of functions have led to a wide range of application fields of titanium products. At present, the focus of titanium application fields is still in aviation and aerospace. , Chemical, medical, automotive, construction, sports, industry, leisure and other fields, so far, titanium is still in short supply, and the development potential is still very large.

What should be paid attention to during the cutting process of titanium plate?

In view of these chemical properties of titanium metal, what problems should be paid attention to during the cutting process of Medical Titanium Plate Grade 2? The following titanium plate manufacturers will tell you.

(1) If it is a semi-automatic cutting, the guide rail should be placed on the surface of the titanium plate, and then the cutting machine should be placed on the guide rail, paying attention to the order not to be reversed.

(2) The cutting parameters should be appropriate, and should be reasonably determined according to the thickness of the titanium plate, so as to obtain a good cutting effect.

(3) Check whether the cutting nozzle is unblocked. If there is a blockage, it should be cleared in time.

(4) Before cutting the Titanium Clad Copper Sheet, the surface should be cleaned and a certain space should be left, which can facilitate the blowing of slag.

(5) The distance between the cutting nozzle and the surface of the titanium plate should be appropriate, too close or too far is not good.

(6) The preheating of the titanium plate should be sufficient, so as not to affect the cutting process.

(7) If you are cutting workpieces of different sizes, you should cut small pieces first, and then large pieces.

Current Status of Domestic Titanium and Titanium Alloy Antifouling Technology

On the one hand, the domestic market for antifouling paints for large-scale ocean-going ships has been monopolized by international multinational companies. On the other hand, my country’s own antifouling coating technology has been in a position of backwardness, imitating and tracking development for a long time. Therefore, my country’s own brand of grade 5 titanium plate Products can only seek survival and development in the cracks between warship painting and the offshore fishing market. So far, the antifouling paint products of our country's independent brands are still dominated by traditional soluble antifouling paints such as blue antifouling paint and chlorinated rubber antifouling paint, and such antifouling paints have been banned and abandoned in developed countries. Compared with developed countries in Europe and the United States, there is still a significant gap in the domestic technological level.

In recent years, the literature and patent reports on new antifouling coatings at home and abroad are very impressive, involving Wuxi self-polishing, controllable dissolution type, biological antifouling, chemical bionics, nano slow-release, alkaline antifouling, biological enzyme antifouling, Low surface energy, conductive anti-fouling, structural bionics, fluorescent anti-fouling and other technical features of Nuoduo. In summary, it can be attributed to two series of release antifouling coatings and non-release antifouling coatings. The release type is still based on the design concept of self-polishing or dissolving antifouling paint, focusing on the research and development of biological extracts or artificially synthesized bionic antifouling agents, as well as biological enzymes and strong substances as antifouling agents, and then developing nano slow-release technologies. The controllable and effective release of various low-toxic, environmentally-friendly antifouling agents in the coating is well-realized, and the purpose of high-efficiency antifouling is achieved. Non-releasing series of antifouling paints such as low surface energy, conductive antifouling, structural bionics, fluorescent antifouling, etc. rely on the specific physical mechanism of the coating to achieve a non-toxic and long-lasting antifouling function map.

Low surface energy antifouling coatings have received more and more attention due to their non-toxic and unique antifouling mechanism. The Luoyang Ship Material Research Institute of my country has been more mature in the research of low surface energy antifouling coatings and has already provided a variety of products for ship antifouling use. However, such coatings have problems such as poor compatibility with primers and poor recoatability. At present, researches on modification of such coatings are being carried out at home and abroad in order to obtain better antifouling effects.

The capsaicin antifouling paint developed by the Second Institute of Oceanography, State Oceanic Administration of my country, is a composite of biologically active substances extracted from natural non-polluting peppers and organic clay. It will not kill attached marine organisms, but only To drive away. The coating has been tested on 7 ships in the South China Sea, the East China Sea, the Yellow Sea, and the North Pacific Ocean. The results show that the capsaicin antifouling paint has obvious antifouling effects.

my country's oceans are vast and there are many types of marine organisms attached, including lime worms, oysters, barnacles, various algae, and branch worms. If Titanium Alloy Rectangular Tube is used in seawater environments, corresponding anti-fouling measures must be adopted.

A variety of methods to prevent marine organism fouling have been studied, such as antifouling paint antifouling, electrolytic seawater antifouling, ultrasonic antifouling, biological antifouling, and low surface free energy antifouling methods. At present, the following measures can be adopted to solve the growth of marine organisms in China:

(1) The sub-exudation type coatings currently used in domestic ships can be used, and the antifouling period is 3 years.

(2) The use of electrolytic seawater for anti-fouling: that is, electrolysis of seawater produces chlorine gas, which is dissolved in water and becomes ClO-1, which is an unstable strong oxidant. As long as its concentration reaches 0.01PPm, it can ensure that sea creatures do not adhere, or Be killed. As hypochlorous acid is extremely unstable, it will soon become NaCl and return to the sea, so it will not pollute the environment.

(3) The use of electrolytic copper and aluminum electrode comprehensive anti-fouling technology: because cuprous oxide is an effective substance to inhibit biological adhesion, copper anodes can be installed on small and medium-sized ships, and Cu + ions are generated by electrolysis through small direct current. When the concentration reaches 5PPb, the adhesion of marine organisms can be prevented. The electrolytic aluminum anode biologically produces Al(OH)3 glue, which can maintain Cu + and make its effect longer. At the same time, Al(OH)3 is attached to the tube wall to prevent corrosion.

What are the methods for mirror polishing of titanium materials

One: grinding

Spread it with 80-mesh water sandpaper and squeeze out the air. The sandpaper is "pasted" on the polishing plate. Turn on the switch of the motor, and grind at the same time as water is supplied. Grind until there is no rough skin on the surface, and then grind it with 320-mesh sandpaper. , Grind the sand pattern to fine, after two minutes, change to 1200 mesh sandpaper to grind to make the surface of the product finer.

Two: polishing (rough polishing, medium polishing, fine polishing, mirror polishing)

1: Coarse polishing: use titanium alloy special hemp wheel or wool wheel and special permanent luminous titanium wax to polish to make the product surface smooth. Pay attention to the intensity of polishing and the direction of product polishing.

2: Medium polishing: Use a titanium alloy special polishing coarse cloth wheel or a fine wool wheel plus a titanium alloy special permanent luminous medium polishing wax to remove the lines left by the rough polishing, and the surface of the product will have brightness.

3: Fine polishing: use Grade 23 Ti-6Al-4V ELI Titanium Bar cotton cloth wheel and titanium alloy special permanent luminous fine polishing wax to make the titanium alloy product reach high brightness. There are some slight cloth patterns on the surface of the product.

4: Mirror polishing: Use a titanium alloy special loose bleached cotton cloth wheel and a titanium alloy special mirror polishing wax to remove the slight cloth patterns on the surface of the product, so that the AMS 4900 CP Titanium Plate mirror can be polished.

However, the above operations require professional polishing hands to meet the product polishing requirements, mainly related to the details of polishing strength, speed, direction, and so on.

Titanium alloy rod material milling processing and advantages

Titanium alloy has high strength, high fracture toughness, good corrosion resistance and weldability. As aircraft fuselages increasingly adopt composite structures, the proportion of titanium-based materials used in the fuselages will also increase, because the bonding properties of titanium and composite materials are far better than aluminum alloys. For example: Compared with aluminum alloy, titanium alloy can increase the life of the fuselage structure by 60%.

The extremely high strength/density ratio of titanium alloys (up to 20:1, which means that the weight can be reduced by 20%) provides a solution for reducing the weight of large components (this is the main challenge for aircraft designers). In addition, the inherent high corrosion resistance of titanium rectangular rod (compared to steel) can save the cost of daily operation and maintenance of aircraft.

Because it is more difficult to process than ordinary alloy steel, titanium alloys are generally considered to be difficult to process materials. The metal removal rate of a typical titanium alloy is only about 25% of that of most ordinary steel or stainless steel, so the time required to process a titanium alloy workpiece is about 4 times that of steel.

In order to meet the growing demand for titanium alloy processing in the aerospace industry, manufacturers need to increase production capacity, and therefore need to better understand the effectiveness of titanium alloy processing strategies. The processing of a typical 6al4v titanium rod workpiece starts from forging until 80% of the material is removed to obtain the final shape of the workpiece.

With the rapid growth of the aerospace parts market, manufacturers have felt powerless, coupled with the increased processing demand due to low efficiency, resulting in obvious tension in the processing capacity of titanium alloys. Some leading companies in the aviation manufacturing industry even publicly question whether the existing machining capabilities can complete all the processing tasks of new titanium alloy workpieces. Since these workpieces are usually made of new alloys, the processing methods and tool materials need to be changed.