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Quasi-beta heat treatment process of a tc4-dt titanium alloy structure

A TC4-DT and titanium alloy technology, which is applied in the field of materials science and titanium alloy quasi-β heat treatment process, can solve the problems of uneven structure and mechanical properties, and achieve uniform structure at the center and edge of the workpiece, good matching of mechanical properties, and improved The effect of stability

Active Publication Date: 2016-03-02
WUXI TURBINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the above-mentioned problems existing in the existing production technology, the present invention provides a quasi-beta heat treatment process for TC4-DT titanium alloy structural parts, which can solve the problem of microstructure and mechanical properties of TC4-DT titanium alloy structural parts after quasi-beta heat treatment. The problem of uneven performance

Method used

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  • Quasi-beta heat treatment process of a tc4-dt titanium alloy structure

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Drill the load couple insertion hole at the maximum effective thickness of the workpiece to be heat treated, and the depth of the load couple insertion hole is half of the maximum effective thickness at this place;

[0023] (2) The workpiece to be heat treated is subjected to homogeneous preheating treatment in the two-phase area, and the heat treatment system of the preheating treatment is (T β -30℃)×130min;

[0024] (3) After the homogenization preheating treatment in the two-phase area is completed, the workpiece is heated to T with the furnace β +15°C, the heating furnace temperature rise rate is controlled at 140°C / h, pay attention to the temperature of the load pair during the heating process of the workpiece with the furnace, when the temperature of the load pair reaches the transition temperature T of the phase transition point of the TC4-DT titanium alloy material β At 10:00, heat preservation time is started, heat preservation is 45 minutes, and the furna...

Embodiment 2

[0027] (1) Drill the load couple insertion hole at the maximum effective thickness of the workpiece to be heat treated, and the depth of the load couple insertion hole is half of the maximum effective thickness at this place;

[0028] (2) The workpiece to be heat treated is subjected to homogeneous preheating treatment in the two-phase area, and the heat treatment system of the preheating treatment is (T β -30℃)×130min;

[0029] (3) After the homogenization preheating treatment in the two-phase area is completed, the workpiece is heated to T with the furnace β +15°C, the heating rate of the heating furnace is controlled at 170°C / h, and the temperature of the load pair is paid attention to during the heating of the workpiece with the furnace. When the temperature of the load pair reaches the transition temperature T of the phase transition point of the TC4-DT titanium alloy material β Start the heat preservation timer at 10:00 pm, keep heat for 20 minutes, and let it cool out ...

Embodiment 3

[0032] (1) Drill the load couple insertion hole at the maximum effective thickness of the workpiece to be heat treated, and the depth of the load couple insertion hole is half of the maximum effective thickness at this place;

[0033] (2) The workpiece to be heat treated is subjected to homogeneous preheating treatment in the two-phase area, and the heat treatment system of the preheating treatment is (T β -30℃)×130min;

[0034] (3) After the homogenization preheating treatment in the two-phase area is completed, the workpiece is heated to T with the furnace β +15°C, the heating furnace temperature rise rate is controlled at 200°C / h, pay attention to the load couple temperature during the heating process of the workpiece with the furnace, when the load couple temperature reaches the transition temperature T of the phase transition point of TC4-DT titanium alloy material β At 10:00, heat preservation timer is started, heat preservation is 33 minutes, and air cooling is carried...

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Abstract

The invention provides a quasi beta thermal treatment technology of a TC4-DT titanium alloy structural component, which can solve the current problem of non-uniform structure and mechanical property of the TC4-DT titanium alloy structural component subjected to quasi beta thermal treatment. The quasi beta thermal treatment technology comprises the following technological steps: firstly, performing two-phase region uniform preheating treatment on a TC4-DT titanium alloy structural forge piece, then, heating the preheated TC4-DT titanium alloy structural forge piece with the furnace, after achieving a temperature protection temperature, taking out the TC4-DT titanium alloy structural forge piece from the furnace, performing air cooling, and finally, performing annealing treatment. The quasi beta thermal treatment technology is characterized by drilling a load coupler inserting hole at the maximum effective thickness part of the TC4-DT titanium alloy structural forge piece, inserting the load coupler into the load coupler inserting hole, after the two-phase region uniform preheating treatment, heating the TC4-DT titanium alloy structural forge piece to T beta + 15 DEG C with the furnace, paying attention to the temperature of the load coupler during the furnace heating process of the TC4-DT titanium alloy structural forge piece, when the temperature of the load coupler reaches the phase transformation point transformation temperature T beta of the TC4-DT titanium alloy material, starting to perform heat preservation and timing, after performing heat preservation for 20-45 minutes, taking out the TC4-DT titanium alloy structural forge piece from the furnace, and performing air cooling.

Description

technical field [0001] The invention belongs to the field of material science and technology, in particular to the field of titanium alloy quasi-beta heat treatment process, in particular to a quasi-beta heat treatment process for TC4-DT titanium alloy structural parts. Background technique [0002] The design of aeronautical structural parts has gradually changed from the initial pursuit of simple static strength, safety, life, and damage-safety design concepts to the modern design concept of pursuing high damage tolerance, which requires that aeronautical structural parts have accidental damage during service When the damage is detected or the structure is repaired, there is still enough residual strength to ensure the safety of the aircraft and personnel. Titanium alloys are widely used in the aerospace field due to their high strength and excellent comprehensive performance. Among the four organizational states of titanium alloys, the basket structure and parallel struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
Inventor 黄定辉李晓婷赵顺峰
Owner WUXI TURBINE BLADE
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