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Subzero treatment process of TC6 titanium alloy forge piece

A cryogenic treatment and titanium alloy technology, applied in the field of cryogenic treatment process, can solve the problems affecting the comprehensive mechanical properties of materials, not considering thermal stress, poor structure, etc., to maintain mechanical stability, improve uniformity and stability, and increase strength and plastic effect

Active Publication Date: 2018-09-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods do not consider the problems of defects such as thermal stress and poor structure produced during the heat treatment process, which will seriously affect the comprehensive mechanical properties of the material.

Method used

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  • Subzero treatment process of TC6 titanium alloy forge piece
  • Subzero treatment process of TC6 titanium alloy forge piece
  • Subzero treatment process of TC6 titanium alloy forge piece

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Step 1: Forging: Put the TC6 titanium alloy bar into the heating furnace and heat it to 1080°C. After holding it for 2 hours, use a hydraulic press to perform axial upsetting, then perform radial drawing and chamfering, and finally perform rounding and upsetting to reach size requested.

[0024] Step 2: heat treatment: solution treatment is carried out on the forged TC6 titanium alloy, the heating temperature is 900 ° C, water quenching is carried out immediately after heat preservation for 3 hours, and after solution treatment; then double annealing treatment is performed, and the double annealing is two low temperature annealings , the first annealing: put the plate obtained in the second step into the heating furnace, raise the temperature of the heating furnace to 820°C at a heating rate of 200°C / h, keep it warm for 3h after soaking, and then air cool for 2h; the second annealing: put the first After the first annealing, the plate is reheated to 640°C with a heating...

Embodiment 2

[0028] Step 1: Forging: Put the TC6 titanium alloy bar into the heating furnace and heat it to 1080°C. After holding it for 2 hours, use a hydraulic press to perform axial upsetting, then perform radial drawing and chamfering, and finally perform rounding and upsetting to reach size requested.

[0029] Step 2: heat treatment: solution treatment is carried out on the forged TC6 titanium alloy, the heating temperature is 900 ° C, water quenching is carried out immediately after heat preservation for 3 hours, and after solution treatment; then double annealing treatment is performed, and the double annealing is two low temperature annealings , the first annealing: put the plate obtained in the second step into the heating furnace, raise the temperature of the heating furnace to 840°C at a heating rate of 200°C / h, keep it warm for 3h after soaking, and then air cool for 2h; the second annealing: put the first After primary annealing, the plate was reheated to 660°C with a heating ...

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Abstract

The invention provides a subzero treatment process of a TC6 titanium alloy forge piece. Firstly, a TC6 titanium alloy bar is heated and subject to forging treatment including axial upsetting, radial drawing-out chamfering and finally rounding and upsetting; the forged TC6 titanium alloy forge piece is subject to solid-solution treatment, dual low-temperature annealing treatment is carried out, andfinally, aging treatment is carried out; finally, subzero treatment is carried out; uniformity and stability of an inner structure of the TC6 titanium alloy forge piece are improved, heat stress generated in the heat treatment process is eliminated, in the microstructure, grains are refined, a dislocation structure is led in, in the aspect of macro-mechanical properties, strength and plasticity of materials can be effectively improved, and the mechanical stability of the materials is kept.

Description

technical field [0001] The invention relates to the technical field of cryogenic treatment process, in particular to a cryogenic treatment process of TC6 titanium alloy forging. Background technique [0002] TC6 titanium alloy is a dual-phase alloy with a complex microstructure. It has the advantages of high specific strength, strong oxidation resistance and corrosion resistance, and is widely used in the manufacture of key aerospace parts. Under harsh service conditions, titanium alloy materials are prone to fatigue fracture, corrosion damage and creep failure. Therefore, further improving the comprehensive mechanical properties and stability of titanium alloys and prolonging their fatigue life have become the key to improving the service performance of titanium alloy aero-engines. [0003] The traditional titanium alloy heat treatment process can make the material obtain the expected structure and performance to a certain extent by changing the structure, type, size and ...

Claims

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Application Information

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IPC IPC(8): C22F1/18
CPCC22F1/002C22F1/183
Inventor 周建忠李京冯爱新孙云辉徐洋洋孟宪凯孙奇
Owner JIANGSU UNIV
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