Pretreatment process capable of prolonging creep rupture life of hot continuous rolled Ti6Al4V alloy

A long-life, hot continuous rolling technology, applied in the field of heat treatment of alloys, can solve the problems of no reference for heat treatment process, high production cost, complicated process, etc., to promote industrial production, increase long-lasting life, and improve product quality Effect

Inactive Publication Date: 2015-05-13
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology

The advantage of this process is that it is relatively mature, cost-effective, and has a wide range of applications; the disadvantage is that it is limited to the heat treatment and performance evaluation of the forged Ti6Al4V alloy. The traditional method of hot forging is prepared, the equipment is expensive and the process is complicated, so the production cost is high
The production of Ti6Al4V alloy by hot continuous rolling technology can reduce the production cost and realize the purpose of industrialized production, but there is no reference for the heat treatment process of improving the lasting life of hot continuous rolling Ti6Al4V alloy mentioned in the present invention

Method used

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Experimental program
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Effect test

Embodiment 1

[0014] The rod-shaped hot-rolled Ti6Al4V alloy was placed in a high-temperature muffle furnace at 1000 °C for 45 min, and then water-cooled; then the alloy was kept at 480 °C for 3 h, and then air-cooled. The purpose is to heat continuously rolled Ti6Al4V alloy at 1000°C for 45 minutes in a high-temperature muffle furnace, and perform solid solution treatment on the alloy to transform the α phase into β phase in the alloy; , Aging treatment is carried out on the alloy, and the needle-like α phase is precipitated at low temperature, so that the microstructure of the alloy is transformed into a basket structure, and the durable life of the alloy is improved.

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Abstract

The invention relates to a thermal treatment process of an alloy, in particular to a thermal treatment process method capable of obviously prolonging a creep rupture life of a hot continuous rolled Ti6Al4V alloy under different conditions. The method comprises the methods of carrying out solid solution treatment and carrying out aging treatment on the hot continuous rolled Ti6Al4V alloy; by changing a microstructure of the alloy, the creep rupture life of the alloy is prolonged. Compared with the creep rupture life of an alloy which is not subjected to thermal treatment, the creep rupture life of the hot continuous rolled Ti6Al4V alloy subjected to thermal treatment is prolonged by 4 to 5 times by implementing the thermal treatment process method.

Description

technical field [0001] The invention relates to a heat treatment process of an alloy, in particular to a heat treatment process which can significantly improve the lasting life of a hot continuous rolling Ti6Al4V alloy under different conditions. Background technique [0002] After the titanium alloy is heat treated by different processes, the microstructure changes in the alloy greatly affect and control the performance of the alloy. It is an important link in the production of titanium alloys and has always been one of the hotspots of materials scientists. The Materials properties handbook: Titanium alloys (1994) published by ASM international discloses a standard heat treatment process for rod-shaped forged Ti6Al4V alloy. The process is 955 ° C, 2 h, water cooling, 540 ° C for 4 h, air cooling. The advantage of this process is that it is relatively mature, cost-effective, and has a wide range of applications; the disadvantage is that it is limited to the heat treatment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18
Inventor 肖丽田素贵包宪宇尚丽娟
Owner SHENYANG POLYTECHNIC UNIV
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