Processing method of refining grains of biphasic titanium alloy bar

A technology of grain refinement and processing method, applied in the field of grain refinement of two-phase titanium alloy bars, can solve the problems of increased cost, high effect, inconspicuousness, etc. The effect of uniform grain refinement

Inactive Publication Date: 2018-05-18
西安赛特思迈钛业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the traditional method of preparing titanium alloy rods is rolling processing. The traditional manufacturing method of processing titanium alloy rods is limited by the processing method, and the prepared rods have a narrow range of microstructure and grain size. With the deepening of the material application, the requirements for the structure and grain size of the material are getting higher and higher. However, the traditional method of increasing the number of fires to refine the grains will increase the cost and the effect is not obvious.

Method used

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  • Processing method of refining grains of biphasic titanium alloy bar
  • Processing method of refining grains of biphasic titanium alloy bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] For Warp TC4 Blank After rolling, the dimension after rolling is The rolling deformation is 98.22%, and then The TC4 rolling is drawn, and the size after drawing is The amount of drawing deformation is 17.87%, and the ratio of rolling and drawing deformation is 5.5:1; the phase transition point of TC4 billet is determined to be 972°C, the drawing temperature is set to 800°C, and the drawing speed is 4m / min. Pass drawing, respectively The single-pass drawing deformations are 6.15%, 6.35%, and 6.55%, respectively. Through the observation of the rod structure after drawing, the microstructure is a fine equiaxed structure with a grain size of 2-5 μm, specifically as follows figure 1 shown.

Embodiment 2

[0018] Pair warp TC20 billet After rolling, the dimension after rolling is The rolling deformation is 97.22%, and then The TC20 rolling is drawn, and the size after drawing is The drawing deformation is 19%, and the ratio of rolling and drawing deformation is 5.1:1; the phase transition point of TC20 billet is determined to be 1029°C, the drawing temperature is set to 880°C, and the drawing speed is 4m / min. Pass drawing, respectively The single-pass drawing deformations were 4.94%, 5.06%, and 5.19%, respectively. Through the observation of the rod structure after drawing, the microstructure is a fine equiaxed structure with a grain size of 5-8 μm, specifically as follows figure 2 shown.

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Abstract

The invention discloses a processing method of refining grains of a biphasic titanium alloy bar. A preform body of the biphasic titanium alloy bar is rolled, the temperature X of the phase transformation point of the rolled preform body of the biphasic titanium alloy bar is measured, the rolled preform body of the biphasic titanium alloy bar is drawn by three passes, and the biphasic titanium alloy bar with the refined grains is obtained; the drawing temperatures of the three passes are all (X-100) to (X-200) DEG C, and the drawing speeds are all 3-5m/min; and the drawing deformation quantities of the three passes are 4%-8%. Under the total deformation amount of the titanium alloy bar is constant, the drawing process is increased, and the deformation process is increased. On a certain basis, the deformation degree of bar processing can be increased to achieve grain refinement through reasonable processing and distribution. The processing method of the titanium alloy bar with ultra-finegrain suitable for mass production is provided under the premise of small cost increasing.

Description

【Technical field】 [0001] The invention belongs to the field of preparation of titanium alloy rods, in particular to a processing method for grain refinement of two-phase titanium alloy rods. 【Background technique】 [0002] Titanium alloys are widely used in aerospace, chemical, medical and other fields due to their high specific strength and non-toxicity. At present, the traditional method of preparing titanium alloy rods is rolling processing. The traditional manufacturing method of processing titanium alloy rods is limited by the processing method, and the prepared rods have a narrow range of microstructure and grain size. With the deepening of the material application, the requirements for the structure and grain size of the material are getting higher and higher. However, the traditional method of increasing the number of fires to refine the grains will increase the cost and the effect will not be obvious. 【Content of invention】 [0003] The purpose of the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
CPCC22F1/183
Inventor 杨晓康王海魏芬绒
Owner 西安赛特思迈钛业有限公司
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