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Heat treatment method for adjusting alpha-beta-phase titanium alloy texture

A heat treatment method and titanium alloy technology, which is applied in the field of titanium alloy processing, can solve the problems of many influencing factors, and achieve the effect of simple parameters, improved stability, and small influencing factors

Inactive Publication Date: 2017-11-07
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common way to change the morphology of α-β two-phase titanium alloy sheets is to use forging, and adjust the forging process parameters to obtain the desired structure, but there are many forging process parameters, specifically: heating temperature, There are many influencing factors on the 7 parameters such as holding time, deformation amount, deformation method, deformation time, and cooling method, so that it is impossible to linearly connect one or several forging processes with the obtained tissue with certain characteristics.

Method used

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  • Heat treatment method for adjusting alpha-beta-phase titanium alloy texture
  • Heat treatment method for adjusting alpha-beta-phase titanium alloy texture
  • Heat treatment method for adjusting alpha-beta-phase titanium alloy texture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Lamellar tissue transforms into spherical tissue after heat treatment:

[0034] The material uses TC4 titanium alloy rod with a diameter of 210mm. The phase transition point is 990°C measured by metallographic method. figure 1 as shown in a.

[0035] Step 1: Use a resistance heat treatment furnace with a heat preservation uniformity of less than or equal to ±15°C in the effective heating zone, and raise the temperature to 840°C (150°C below the phase transition point);

[0036] Step 2: Put the bar into the effective area of ​​the heat treatment furnace. At this time, the furnace temperature will drop to about 700°C. When the furnace temperature rises to 840°C, start to calculate the holding time;

[0037] Step 3: The total holding time is set to 30 hours. After the holding time reaches the requirement, it can be released from the oven, and the bar is air-cooled at room temperature.

[0038] Sampling and checking the structure of the bar, and comparing the structure of...

Embodiment 2

[0040] The lamellar structure transforms into a two-state structure after heat treatment:

[0041] The material uses TC4 titanium alloy rod with a diameter of 210mm. The phase transition point is 990°C measured by metallographic method. figure 2 as shown in a.

[0042] Step 1: Use a resistance heat treatment furnace with a heat preservation uniformity of less than or equal to ±15°C in the effective heating zone, and raise the temperature to 960°C (30°C below the phase transition point);

[0043] Step 2: Put the bar into the effective area of ​​the heat treatment furnace. At this time, the furnace temperature will drop to about 800°C, and the holding time will be calculated when the furnace temperature rises to 960°C again;

[0044] Step 3: The total holding time is set to 10 hours. After the holding time reaches the requirement, it can be released from the oven, and the bar is air-cooled at room temperature.

[0045] Sampling and checking the structure of the bar, the struc...

Embodiment 3

[0047] After heat treatment, the spherical structure transforms into a two-state structure:

[0048] The material is TC4 titanium alloy bar with a diameter of 210mm. The phase transition point is 990°C measured by metallographic method. The bar is obtained by forging the ingot through multiple fires below the phase transition point. image 3 as shown in a.

[0049] Step 1: Use a resistance heat treatment furnace with a heat preservation uniformity of less than or equal to ±15°C in the effective heating zone, and raise the temperature to 970°C (20°C below the phase transition point);

[0050] Step 2: Put the bar into the effective area of ​​the heat treatment furnace. At this time, the furnace temperature will drop to about 800°C. When the furnace temperature rises to 970°C, start to calculate the holding time;

[0051] Step 3: The total holding time is set to 3 hours. After the holding time reaches the requirement, it can be released from the oven, and the bar is air-cooled a...

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Abstract

The invention discloses a heat treatment method for adjusting the microstructure of an α-β two-phase titanium alloy. By heating the forged α-β two-phase titanium alloy below the phase transition point, keeping it warm, performing heat treatment and cooling, the microstructure can be realized. Transformation, adjustment of α-phase content or elimination of defective tissue. The process parameters of the present invention only have three parameters: heating temperature, holding time, and cooling method, which are simpler than forging parameters and have small influencing factors. The process parameters can be compared with the obtained α-β two-phase titanium alloy microstructure Linear connection is beneficial to find out the direct relationship between tissue and process parameters from the perspective of scientific research, and it is beneficial to improve the stability of process and product from the perspective of industrial production.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a heat treatment method for adjusting the microstructure of an α-β two-phase titanium alloy. Background technique [0002] Titanium alloy has a series of characteristics such as low density, high specific strength, good corrosion resistance, excellent heat resistance, and non-magnetic, and has been widely used. At present, the common way to change the microstructure and morphology of α-β two-phase titanium alloy sheet is to use forging, and adjust the forging process parameters to obtain the desired structure, but there are many forging process parameters, specifically: heating temperature, There are many factors affecting seven parameters, including holding time, deformation amount, deformation method, deformation time, and cooling method, so that it is impossible to linearly connect one or several forging processes with the obtained tissue with cer...

Claims

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Application Information

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IPC IPC(8): C22F1/18
CPCC22F1/183
Inventor 王文盛陈海生张小航高玉社赵小花郝芳
Owner 西部超导材料科技股份有限公司
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