Classification of medical titanium alloys

Grade 5 Ti-6Al-4V Titanium Bar can be divided into α-type titanium alloys (such as pure titanium series), α+β-type titanium alloys (such as Ti6Al4V, etc.), β-type titanium alloys (such as Ti12Mo6Zr2Fe, etc.) and TiNi shape memory titanium alloys according to the type of material microstructure. There are four types of alloys. Compared with medical stainless steel and cobalt-based alloys, they have the characteristics of small specific gravity, high specific strength, low elastic modulus, corrosion resistance, easy cutting and good biocompatibility.

According to professional standards for surgical implants and orthopedic devices, titanium alloy materials can be classified as "metal materials" in "materials for surgical implants", while Titanium Threaded Forged Fitting materials are used in non-active surgical implants and active surgical implants. In the three major categories of medical devices, implants and orthopedic devices, they can serve as cardiovascular, bone and joint, bone joint, spine, orthopedic devices, cardiac pacemakers and defibrillators, cochlear implants, neurostimulators and other implants The raw material of the product.

The difference between titanium and titanium alloy

Titanium is a single substance, and titanium alloy is a mixture. Therefore, titanium alloys have more diverse properties and wider uses.

Titanium alloy Concept definition: The alloy composed of titanium as the base and other alloying elements is called titanium alloy. Titanium alloy has the advantages of low density, high specific strength, good corrosion resistance, and good process performance, and is an ideal structural material for aerospace engineering.

Research scope: Titanium alloys can be divided into structural titanium alloys and heat-resistant titanium alloys, or α-type titanium alloys, β-type grade 5 titanium sheet, and α+β-type titanium alloys. The research scope also includes forming technology of titanium alloy, powder metallurgy technology, rapid solidification technology, military and civilian use of titanium alloy, etc.

Titanium alloy is a new type of structural material, which has excellent comprehensive properties, such as low density (~4.5g cm-3), high specific strength and specific fracture toughness, good fatigue strength and crack growth resistance, and good low-temperature toughness. Excellent corrosion resistance, some titanium alloys have a maximum operating temperature of 550ºC and are expected to reach 700ºC. Therefore, it has been widely used in aviation, aerospace, chemical industry, shipbuilding, and other industrial sectors, and has developed rapidly. The relationship between (σ0.2/density) and the temperature of light alloys, steels, etc., the specific strength of ASTM F67 Gr2 Titanium Plate is higher than that of other light metals, Steel, and nickel alloys, and this advantage can be maintained up to about 500ºC, so some titanium alloys are suitable for making gas turbine components. About 80% of titanium production is used in the aviation and aerospace industry. For example, titanium alloy accounts for about 21% of the body structure materials of the US B-1 bomber, which is mainly used to manufacture fuselage, wings, skin, and load-bearing components. The body structural material of the F-15 fighter jet uses 7000kg of titanium alloy, accounting for about 34% of the structural weight. In the structural parts of the Boeing 757 passenger plane, titanium alloy accounts for about 5%, and the amount is up to 3640 kg. In the DC10 aircraft produced by Mc-Donnell-Douglas, the amount of titanium alloy is 5500kg, accounting for more than 10% of the structural weight. Titanium consumption in chemical and general engineering fields: the United States accounts for about 15% of its production, and Europe accounts for about 40%. Due to the excellent corrosion resistance, good mechanical properties, and qualified tissue compatibility of titanium and its alloys, it is used to make biomaterials such as prosthetic devices.

0.01mm - 0.5mm ASTM F67 Gr. 23 Titanium Foil

 

Basic Info

Model NO.

ASTM F67 Gr. 23

Surface Treatment

Polished, Pickled

Packing

Plywood

MOQ

20 Kgs

Delivery Time

5-15 Days

Trademark

Allotech

Transport Package

as Per Customer′s Requirement.

Specification

Customzied

Origin

China

HS Code

8108902000

Product Description

Our commitment to providing grade 1 titanium foil products with the highest quality is the cornerstone of our success. Allotech strives to provide our customers with personalized material solutions designed to suit their needs and manufacturing processes.

Processing	Cold rolling, Annealed
Standard	ASTM B265, ASTM F136, ASTM F67
Thickness	0.01 mm - 0.5 mm
Width	20-600mm
Length	As Your Required
Grade	Gr1, Gr2, Gr3 , Gr23, etc.
Surface	No burr No oil spots
Packaging	Wooden cases

Applications:
Grade 2 Pure Titanium Foil in the coil is mainly applied to electron, chemical industry, horologe, glasses, ornaments, sports good, mechanical equipments, galvanizing apparatus, environmental protection, golf, medical, precision processing industry and so on. 

Features:
Corrosion resistance
Low modulus of elasticity
Good heat-exchanger performance
Non magnetic
Suction performance
Bear high & low temperature, etc
Nonmagnetic and Non-toxic

Detection:
Visual inspection to check surface quality, ensuring without any flaw, black and any other defects.
Chemical Composition Detection, making sure all chemical components can meet your demands.
Mechanical Features testing, making sure all titanium foils have satisfying mechanical features before delivery.

Quality Assurance:
According to globally recognized standards, such as ASTM, AMS, ASME, JIS, MIL.
Chemical composition, Mechanical properties, making sure no defects inside the products.
ISO Quality Management System.

Characteristics and precautions of titanium alloy tube

Generally, the environment for titanium tube manufacturers to repair and weld titanium tubes cannot have flowing air, and other aspects are the same as repair welding in a welding box. But special attention should be paid to:

1. The repair welding area should not be too large, the flow of nitrogen gas should be larger during the repair welding process, and the gas cannot be stopped in the middle;

2. After repair welding, nitrogen protection should be continued until the area cools down;

3. For some special castings, such as complex thin-walled castings, in order to prevent oxidation on the back of the repair welding area, argon can be blown to the back until the casting cools down;

4. It is required that repair welding operators have a high technical level.

In order to obtain titanium tube castings with good repair welding quality, the following points should be paid attention to during the repair welding process:

1. The surface of the repaired castings must be cleaned and dried, and the castings are not allowed to be touched directly with hands before they are put into the welding box.

2. In the process of repairing grade 5 titanium sheet, strictly prevent the short circuit between the tungsten electrode and the repaired part, which will cause the tungsten electrode to break and cause tungsten inclusions in the solder joints.

3. When the area and depth of the repair welding area are relatively large, the remote layer welding should be divided into multiple times, and the next layer of welding can only be performed after the previous layer of welding layer is completely cooled. It is absolutely not allowed to weld in one time. Prevent casting deformation.

4. When the repair welding is about to end, the current should be gradually reduced to reduce the melting zone. Therefore, it is recommended to use pulse current to prevent sudden arc breaking and cracks.

5. After repair welding, the casting should be cooled in the box for a period of time before taking out the casting to prevent cracks or deformation in the welding area of ​​the casting caused by rapid cooling; the cooling time depends on the wall thickness of the casting, usually 15-30mm.

6. After the repair welding of titanium tube castings, it should be annealed or hot isostatic pressed in time, and it should not be left for too long, usually no more than 5 days.

7. The number of welding repairs cannot exceed the provisions of the relevant technical documents.

Titanium rod, titanium plate, burr treatment method of titanium workpiece

The method of this kind of mechanical treatment is: to bury the Titanium Coil Tube in a lot of abrasives, add some grinding and polishing compounds dissolved in water, use the principle of vibration to mix the abrasives and materials, and continuously wash the workpiece, the surface, and edges of the workpiece Angles, etc. are ground by abrasives and then polished. This technique can be used for deburring, chamfering, derusting, descaling, flattening, and fine polishing for metal parts of various sizes and shapes.

Abrasives can be alumina (including fused, sintered, or natural), corundum, plastic, quartz, ceramics, etc., which can be single or mixed. The shapes of these abrasives can be made into diagonal, cylindrical, diamond-shaped, etc. The reason why pre-shaped abrasives are made first is that they are more economical and wear faster than random-shaped and natural-shaped materials. According to the shape and size of the workpiece, choose abrasives of different shapes and sizes. Abrasives for tumbling include pumice, quartz, granite horns, shells, iron filings, and ceramic fragments. The size of the abrasive grain should be larger or smaller than each hole of the part. The amount of content in the drum is also an important factor affecting the quality of the surface of the parts. The amount of people in the drum is usually 70% of the volume of the drum. The solution in the drum should be added to account for about 95% of the volume of the drum (note: when adding the acidic solution to the drum, add enough water first, and then add acid to prevent parts from corroding during the rolling process, due to the increase in time , the concentration of the built-in solution gradually decreases, and even loses its effect.

Trimming process requirements and methods for titanium alloy forging

In the application of various titanium alloy products, forgings are mostly used in occasions requiring high strength, high toughness, and high reliability, such as gas turbine compressor discs and medical artificial bones. Therefore, not only high dimensional accuracy is required for forgings, but also materials with excellent characteristics and high stability are required. For this reason, in the manufacturing process of forge titanium ring, the characteristics of titanium alloys should be fully utilized to obtain high-quality forgings. Titanium alloy metal is difficult to forge and is prone to cracks. Therefore, it is very important to properly control the forging temperature and plastic deformation in the production of titanium alloy forgings.

Trimming of titanium alloy forgings must meet the following requirements:

1. The incision is smooth, and the metal on the blank must not collapse.

2. There must be no cracks in the part adjacent to the incision surface of the blank, and there must be no uneven grain size caused by uneven trimming deformation.

3. No indentation of the punch shall be left on the trimmed blank, and the shape of the punch and the part shall be exactly the same.

The edge can be trimmed with a milling machine or cut with a band saw and a specially designed friction plate. For large forgings and thick burrs, regardless of the size or batch size of the parts, it is inconvenient to thermally trim the edges, and flame cutting is an effective method. Oxygen gas, plasma, and other techniques can be used to successfully and economically cut burrs of 50 mm or thicker. After flame cutting, heat treatment should be carried out so that the heat-affected zone can be machined. For larger batches of medium and small titanium alloy forgings, the edge is usually trimmed with a die on a crank press, and the edge trimming is carried out at 600-800°C. If straightening must be carried out immediately after trimming, the trimming temperature should be close to the upper limit. Titanium alloys are rarely trimmed with a mold in a cold state because the burrs are very hard and brittle, which may easily cause uneven incisions, and even cause the risk of metal cracking and rapid debris splashing; for some alloys with a high degree of alloying, cold trimming It will cause cracks on the shear surface, and the cracks will extend into the metal from time to time.

Structural Titanium Alloy

Low-strength titanium alloys are mainly used for corrosion-resistant titanium alloys. Other titanium alloys are used for structural parts called structural alloys. In practical applications, structural titanium alloys are divided into: ordinary-strength titanium alloys, medium-strength titanium alloys, and high-strength titanium alloys. alloy. Ordinary strength titanium alloy: due to its good processing and formability and weldability, it is mostly used in the manufacture of various aviation sheet parts and civil products such as hydraulic pipes and bicycles. Medium-strength grade 5 titanium round bar: The typical alloy is TC4, which is mostly used in high-tech industries such as aerospace and rocket launch. High-strength titanium alloys: generally used to replace high-strength structural steel commonly used in aircraft structures.