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Thermal treatment method for hydrogen removing of titanium wires

A heat treatment method and technology for titanium wire, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of wire elongation and strength loss, high annealing temperature, long annealing time, etc., and achieve simple treatment methods and clever design. , Remarkable effect of removing hydrogen

Active Publication Date: 2014-01-01
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vacuum annealing system commonly used at present is to carry out a heat preservation treatment at a constant temperature, but there are certain problems in this system
Due to the high annealing temperature and long annealing time of the existing vacuum annealing system, although it is beneficial to reduce the hydrogen content, it will cause serious losses to the elongation and strength of the wire.

Method used

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  • Thermal treatment method for hydrogen removing of titanium wires
  • Thermal treatment method for hydrogen removing of titanium wires
  • Thermal treatment method for hydrogen removing of titanium wires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] TA1 pure titanium wire (its starting recrystallization temperature T rs 590°C, the final recrystallization temperature T re 650°C) dehydrogenation heat treatment:

[0019] Put the TA1 pure titanium wire after pickling treatment into the vacuum heat treatment furnace, and the vacuum degree is not more than 1.0×10 -2 Under the vacuum condition of Pa, the TA1 pure titanium wire was heated up to 560°C at a heating rate of 6°C / min and then kept for 80 minutes, then raised to 600°C at a heating rate of 6°C / min and kept for 100 minutes, and finally heated at 6°C / min The heating rate was increased to 660°C and then kept for 80 minutes.

[0020] The TA1 pure titanium wire after hydrogen removal heat treatment was cooled naturally or with argon to room temperature of 25°C, and then the mechanical properties and hydrogen content were tested. The test data are shown in Table 1.

[0021] Table 1 Example 1 Mechanical properties and hydrogen content of TA1 pure titanium wire before...

Embodiment 2

[0025] TA1ELI pure titanium wire (its starting recrystallization temperature T rs 570°C, the final recrystallization temperature T re 640°C) dehydrogenation heat treatment:

[0026] Put the TA1ELI pure titanium wire after pickling treatment into the vacuum heat treatment furnace, and the vacuum degree is not more than 1.0×10 -2 Under the vacuum condition of Pa, the TA1ELI pure titanium wire was heated up to 550°C at a heating rate of 6°C / min and then kept for 80 minutes, then raised to 580°C at a heating rate of 6°C / min and kept for 100 minutes, and finally heated at 6°C / min The heating rate was increased to 660°C and then kept for 80 minutes.

[0027] The TA1ELI pure titanium wire after hydrogen removal heat treatment was cooled naturally or with argon to a room temperature of 25°C, and then the mechanical properties and hydrogen content were tested. The test data are shown in Table 2.

[0028] Table 2 Example 2 Mechanical properties and hydrogen content of TA1ELI pure tit...

Embodiment 3

[0032] TA2 pure titanium wire (its recrystallization temperature T rs 650°C, the final recrystallization temperature T re 750°C) dehydrogenation heat treatment:

[0033] Put the TA2 pure titanium wire after pickling treatment into the vacuum heat treatment furnace, and the vacuum degree is not more than 1.0×10 -2 Under the vacuum condition of Pa, the TA2 pure titanium wire was heated up to 620°C at a heating rate of 8°C / min and then kept for 40 minutes, then raised to 680°C at a heating rate of 8°C / min and kept for 100 minutes, and finally heated at 8°C / min The heating rate was increased to 750°C and then kept for 80 minutes.

[0034] The TA2 pure titanium wire after hydrogen removal heat treatment was cooled naturally or with argon to a room temperature of 25°C, and then the mechanical properties and hydrogen content were tested. The test data are shown in Table 3.

[0035] Table 3 Example 3 Mechanical properties and hydrogen content of TA2 pure titanium wire before and af...

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Abstract

The invention provides a thermal treatment method for hydrogen removing of titanium wires. The thermal treatment method comprises the following steps: under a vacuum condition, raising the temperature of the titanium wires to (Trs-30)-(Trs-10) DEG C, and performing thermal insulation for 30-90 min; then, raising the temperature to (Trs+10)-(Tre-10) DEG C, and performing thermal insulation for 90-180 min; finally, raising the temperature to Tre-(Tre+30) DEG C, and performing thermal insulation for 60-90 min, wherein the Trs represents the recrystallization temperature of the titanium wires, the Tre represents the recrystallization termination temperature of the titanium wires, and Trs and Tre both adopt the unit of DEG C; the titanium wires are pure titanium wires or titanium alloy wires. According to the thermal treatment method, a multi-stage heat-insulating system is adopted for thermal treatment for hydrogen removing, and an excellent hydrogen removing effect is achieved while the mechanical properties of the titanium wires are not damaged. The thermal treatment method is simple, unique in design and obvious in hydrogen removing effect.

Description

technical field [0001] The invention belongs to the technical field of titanium material processing, and in particular relates to a heat treatment method for dehydrogenation of titanium wire. Background technique [0002] For titanium and titanium alloy wire, the impurity element hydrogen has a great influence on its performance. Titanium and titanium alloys are easy to absorb hydrogen from the high temperature atmosphere of pickling solution, corrosive solution and thermal processing, resulting in "hydrogen embrittlement" phenomenon, which significantly reduces the impact toughness and plasticity of wire. [0003] Vacuum annealing is one of the main means to reduce the hydrogen content in titanium and titanium alloy wire. The vacuum annealing system commonly used at present is to carry out a heat preservation treatment at a constant temperature, but there are certain problems in this system. Due to the high annealing temperature and long annealing time of the existing vac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/16C21D3/06C21D9/52
Inventor 韩栋毛小南洪权李磊张永强雷文光贾蔚菊郭萍
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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