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Isothermal forging method of TiAl alloy

An isothermal forging and alloying technology, which is applied in the field of processing intermetallic compound alloy targets, can solve the problems of high hardness, high brittleness, and difficulty in ensuring processing quality, and achieve the effect of overcoming high hardness and uniform tissue size

Inactive Publication Date: 2013-02-27
浙江嘉钛金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of high hardness, high brittleness and difficult processing of the alloy, it is difficult to ensure good processing quality of the alloy during processing, and obvious surface defects such as cracks appear in the material, which seriously affect the normal use of the material.

Method used

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  • Isothermal forging method of TiAl alloy
  • Isothermal forging method of TiAl alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Forging TiAl alloy by isothermal forging technology, the specific steps are as follows:

[0021] (a) Material flaw detection: After smelting TiAl (the mass percentage content of Ti is 87.5%, and the mass percentage content of Al is 12.5%) alloy ingots are turned to remove surface scale and visible crack defects, and ultrasonic flaw detection is used Confirm that the material has no defects such as pores;

[0022] (b) Heating and heat preservation of machine molds: Equip a 630-ton press with a heat preservation furnace with a heating device to ensure that the mold temperature is 850°C and that the temperature during the forging process is 850°C;

[0023] (c) Material surface treatment: Coat the surface of the defect-free TiAl alloy with a high-temperature oxidation-resistant coating. Thickness 0.1mm, only need to paint once, let it dry for a while and heat it in the furnace;

[0024] (d) Material heat treatment: heat a TiAl alloy with a diameter of 100mm coated with a ...

Embodiment 2

[0027] Forging TiAl alloy by isothermal forging technology, the specific steps are as follows:

[0028] (a) Material flaw detection: After smelting TiAl (the mass percentage content of Ti is 75% and the mass percentage content of Al is 25%) alloy ingot is turned to remove surface scale and crack defects visible to the naked eye, and ultrasonic flaw detection is used Confirm that the material has no defects such as pores;

[0029] (b) Heating and heat preservation of machine molds: equip a 630-ton press with a heat preservation furnace with a heating device to ensure that the mold temperature is 900°C and that the temperature during the forging process is 900°C;

[0030] (c) Material surface treatment: Coat the surface of the defect-free TiAl alloy with a high-temperature oxidation-resistant coating. Thickness 0.2mm, only need to paint once, let it dry for a while and put it into the furnace for heating;

[0031] (d) Material heat treatment: heat a TiAl alloy with a diameter ...

Embodiment 3

[0034] Forging TiAl alloy by isothermal forging technology, the specific steps are as follows:

[0035] (a) Material flaw detection: After smelting TiAl (the mass percentage content of Ti is 64%, and the mass percentage content of Al is 36%) alloy ingots are turned to remove surface scale and visible crack defects, and ultrasonic flaw detection is used Confirm that the material has no defects such as pores;

[0036] (b) Heating and heat preservation of machine molds: Equip a 630-ton press with a heat preservation furnace with a heating device to ensure that the temperature of the mold is 880°C, and that the temperature during the forging process is 880°C;

[0037] (c) Material surface treatment: Coat the surface of the defect-free TiAl alloy with a high-temperature oxidation-resistant coating. Thickness 0.15mm, only need to paint once, let it dry for a while and put it into furnace for heating;

[0038] (d) Material heat treatment: heat the TiAl alloy with a diameter of 100 ...

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Abstract

The invention discloses an isothermal forging method of TiAl alloy. The method comprises steps that: scale and crack defects visible to naked eye on a surface of a melted alloy ingot casting are lathed and a supersonic wave flaw detection is conducted; a holding furnace with a heater is arranged on a press, and a die temperature is controlled at 850-900 DEG C, especially during a forging process; defect-free TiAl alloy is coated with a high temperature oxidation resistant coating on the surface thereof, and dried naturally; the surface treated TiAl alloy is heated in the holding furnace and insulated at 1150-1250 DEG C for 2-2.5 h; the heated TiAl alloy is treated with the isothermal forging along a material height direction, with an initial deflection controlled within 5%, compacted for 2 times, heated in the holding furnace again, and insulated at 1150-1250 DEG C for 0.5-1h; and the above forging process is repeated until the TiAl alloy plate with a preset thickness is obtained. The technology of the invention is simple, at low costs, and capable of preparing a high quality and defect-free TiAl alloy target material.

Description

technical field [0001] The invention relates to a processing method of an intermetallic compound alloy target, in particular to an isothermal forging method of a TiAl alloy used for magnetron sputtering coating. Background technique [0002] Magnetron sputtering coating is a new type of physical vapor coating method. Compared with the earlier evaporation coating method, its advantages in many aspects are quite obvious. As a relatively mature technology that has been developed, magnetron sputtering has been applied in many fields. Magnetron sputtering coating targets are divided into metal sputtering coating targets, alloy sputtering coating targets, ceramic sputtering coating targets, boride ceramic sputtering targets, carbide ceramic sputtering targets, fluoride ceramic sputtering targets Sputtering targets, nitride ceramic sputtering targets, oxide ceramic targets, etc. Ti-Al alloy target is the core material of multi-arc ion plating (Ti, Al) N film, which requires unifo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C22C14/00B21J5/00
Inventor 吕维洁陈科王立强王敏敏覃继宁张荻
Owner 浙江嘉钛金属科技有限公司
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