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Preparing process of TA3 titanium bar with low iron content and high anti-corrosion performance

A preparation process, a technology of titanium rods, applied in the processing field of pure titanium rods, can solve the problems of optimization of anti-corrosion performance of pure titanium, decline of mechanical properties of pure titanium, reduction of plasticity of pure titanium, etc., to achieve low Fe content, grain size Small, evenly textured effect

Active Publication Date: 2019-12-31
BAOJI YIXIN METALS PROD WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reducing the content of Fe can greatly improve the anti-corrosion performance of pure titanium, but the mechanical properties of pure titanium will decrease, so it is necessary to increase the content of O to prevent the decline of mechanical properties, and too high O content will reduce the plasticity of pure titanium , during forging, it is very easy to produce cracks, and it is difficult to optimize the anti-corrosion performance of pure titanium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation process of a TA3 titanium rod with low iron and high anticorrosion performance, comprising the following steps:

[0025] Step 1: Vacuum Melting

[0026] Sponge titanium with an Fe content of 0.04% is selected as a raw material for vacuum melting to obtain a Fe content of 0.042%, an O content of 0.254% and a specification of titanium ingot;

[0027] Step 2: The first piercing deformation

[0028] The specification after vacuum melting is Titanium ingots were heated to 1050°C in a natural furnace and held for 360 minutes, and then shaped to According to the specifications, the 3500T hydraulic press is used to perform three times of reversing pier extraction, and the pier extraction method is any direction pier extraction:

[0029] Will reshape to The standard titanium ingot is lowered to a height of about 500mm and the titanium ingot is irregular in shape, and then it is stretched on any surface to the size before the lowering, and continues to go t...

Embodiment 2

[0041] A preparation process of a TA3 titanium rod with low iron and high anticorrosion performance, comprising the following steps:

[0042] Step 1: Vacuum Melting

[0043] Sponge titanium with an Fe content of 0.04% is selected as a raw material for vacuum melting to obtain a Fe content of 0.042%, an O content of 0.254% and a specification of titanium ingot;

[0044] Step 2: The first piercing deformation

[0045] The specification after vacuum melting is Titanium ingots were heated to 1050°C in a natural furnace and held for 360 minutes, and then shaped to Specifications, and then use a 3500T hydraulic press to perform three times of reversing pier extraction, and the pier extraction method is the same direction pier extraction:

[0046] Will reshape to The standard titanium ingot is piered from one side to a titanium ingot with a height of about 500mm and irregular shape, and then drawn from the lower pier surface to the size of about the front of the pier, and th...

Embodiment 3

[0058] A preparation process of a TA3 titanium rod with low iron and high anticorrosion performance, comprising the following steps:

[0059] Step 1: Vacuum Melting

[0060] Sponge titanium with an Fe content of 0.045% is selected as a raw material for vacuum melting to obtain a Fe content of 0.053%, an O content of 0.273% and a specification of titanium ingot;

[0061] Step 2: The first piercing deformation

[0062] The specification after vacuum melting is Titanium ingots were heated to 1080°C in a natural furnace and held for 360 minutes, and then shaped to According to the specifications, the 3500T hydraulic press is used to perform three times of reversing pier extraction, and the pier extraction method is any direction pier extraction:

[0063] Will reshape to The standard titanium ingot is lowered to a height of about 500mm and the titanium ingot is irregular in shape, and then it is stretched on any surface to the size before the lowering, and continues to go ...

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Abstract

The invention discloses a preparing process of a TA3 titanium bar with the low iron content and high anti-corrosion performance, and belongs to the technical field of machining methods of pure-titanium bars. The mechanical performance of the pure-titanium bar is improved by selecting sponge titanium with the Fe content of 0.05% as the raw material through the step S1 of vacuum melting, the step S2of primary pier drawing deformation, the step S3 of secondary pier drawing deformation, the step S4 of drawing out, the step S5 of rolling and the step S6 of annealing. Under the low Fe content, through the subsequent forging process, the balance of the mechanical performance is kept; and meanwhile, large deformation is adopted for forging, so the bar is small in grain size and more even in texture, and the low Fe content and high anti-corrosion performance are realized, and meanwhile high mechanical performance is realized.

Description

technical field [0001] The invention relates to the technical field of processing methods for pure titanium rods, in particular to a preparation process for TA3 titanium rods with low iron and high anticorrosion performance. Background technique [0002] In order to improve the mechanical properties of pure titanium, Fe and O elements are generally added during the processing process, and the mechanical properties of pure titanium are different according to the amount of Fe and O added. The industry standard for finished TA3 titanium rods is GB / T2965 -2007, the minimum values ​​of its main mechanical properties are as follows: the tensile strength is 500MPa, the plastic elongation strength is 380MPa, the expansion rate after fracture is 18%, and the end shrinkage rate is 30%; the chemical composition standard meets GB / T2965-2007 and implements GB / T3620 .1, where the maximum content of main components Fe and O is 0.30% and 0.35% respectively. Reducing the content of Fe can g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22B9/04C22B34/12
CPCC22B9/04C22B34/1295C22F1/183
Inventor 孙子城孙敏段晓辉
Owner BAOJI YIXIN METALS PROD WORKS
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