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Preparation method for TA5 titanium alloy bars with small specifications

A titanium alloy, small size technology, applied in the field of preparation of TA5 titanium alloy small size bar, can solve the problems of low yield, easy cracking, poor plasticity, etc., to achieve high yield, reduce cracks, reduce the effect of surface cracks

Inactive Publication Date: 2013-02-13
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plasticity of TA5 titanium alloy is poor, and it is very easy to crack during the forging and rolling process, resulting in low yield and even scrapping the whole batch.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of the TA5 titanium alloy small size bar of the present embodiment comprises the following steps:

[0021] Step 1. The TA5 titanium alloy ingot with a diameter of 620mm is subjected to two times of billet forging by using a hydraulic press. The initial forging temperature is 80°C above the β transformation point, and the surface grinding treatment is carried out after air cooling to obtain the first forging billet; the cross section of the first forging billet is a square with a side length of 250mm; the accumulated billet forging The amount of deformation is 79%, and the final forging temperature of each blank forging is not lower than 850°C;

[0022] Step 2. Use a hydraulic press to carry out the first elongation forging of the first forging billet described in step 1. The temperature of the first elongation forging for each fire is 20°C above the β transition point, and then carry out the first elongation forging after air cooling. Surface gri...

Embodiment 2

[0028] The preparation method of the TA5 titanium alloy small size bar of the present embodiment comprises the following steps:

[0029] Step 1. The TA5 titanium alloy ingot with a diameter of 560 mm is subjected to two times of billet forging by using a hydraulic press. The initial forging temperature of forging is 100°C above the β transformation point, and after air cooling, surface grinding treatment is carried out to obtain the first forging blank; the cross section of the first forging blank is a square with a side length of 240mm; the blank forging The cumulative deformation is 77%, and the final forging temperature of each blank forging is not lower than 850°C;

[0030] Step 2. Use a hydraulic press to carry out the first elongation forging of the first forging billet described in step 1 twice, and the temperature of the first elongation forging for each fire is 30°C above the β transition point, and carry out after air cooling Surface grinding treatment to obtain the...

Embodiment 3

[0036] The preparation method of the TA5 titanium alloy small size bar of the present embodiment comprises the following steps:

[0037] Step 1. The TA5 titanium alloy ingot with a diameter of 690mm is subjected to two times of billet forging by using a hydraulic press. The initial forging temperature of forging is 50°C above the β transformation point, and after air cooling, surface grinding treatment is carried out to obtain the first forging blank; the cross section of the first forging blank is a square with a side length of 270mm; the blank forging The cumulative deformation is 80%, and the final forging temperature of each blank forging is not lower than 850°C;

[0038] Step 2. Use a hydraulic press to carry out the first elongation forging of the first forging billet described in step 1 for three times of first elongation. The temperature of the first elongation forging of each fire is 10°C above the β transition point, and then carry out after air cooling. Surface gri...

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Abstract

The invention provides a preparation method for TA5 titanium alloy bars with small specifications. The method comprises the following steps: first, cogging forging is performed on TA5 titanium alloy ingot above a beta phase change point at 50 DEC G-200 DEC G to obtain first forging stock; second, pulling forging is performed on the first forging stock above the beta phase change point at 10 DEC G -30 DEC G to obtain second forging stock; third, second pulling forging is performed on the second forging stock below the beta phase change point at 10 DEC G -20 DEC G to obtain a third forging stock; fourth, the third forging stock is thoroughly abraded; and fifth, the third forging stock is rolled at initial rolling temperature of 30 DEG C-40 DEG C below the phase change point to obtain the TA5 titanium alloy bars of small specifications with diameter of 17mm-33mm. Bar blanks are rolled by the method of combining cogging forging, free forging and fine forging, and the TA5 titanium alloy bars with small specifications are rolled and obtained. The TA5 titanium alloy bars with small specifications are good in surface quality and mechanical properties and high in yield.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium alloy materials, and in particular relates to a method for preparing TA5 titanium alloy small-size rods. Background technique [0002] The nominal composition of TA5 titanium alloy is Ti-4Al-0.005B, which is a full α-type titanium alloy. TA5 titanium alloy has good welding and corrosion resistance, and can be used as structural material in seawater corrosion environment, and has been successfully used in shipbuilding industry. However, the plasticity of TA5 titanium alloy is poor, and it is very easy to crack during the forging and rolling process, resulting in low yield and even scrapping the whole batch. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for rolling TA5 titanium alloy small-sized rods in view of the above-mentioned deficiencies in the prior art. The preparation method of a TA5 titanium alloy s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J5/00B21J5/06
Inventor 李维廖强吴华李进元王宏权蒲宣侯鹏张智郭征
Owner WESTERN TITANIUM TECH
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