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High temperature, solid solution, strengthened, heat-resistant titanium alloy containing rare earth

A solid solution strengthening, titanium alloy technology, applied in the field of heat-resistant titanium alloys, can solve the problems of creep resistance and thermal stability that cannot meet the requirements of use, deterioration of alloy properties, etc., and achieve good creep resistance and thermal stability. , Improve the performance of processing technology, and improve the effect of comprehensive performance

Inactive Publication Date: 2007-10-10
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, advanced aero-engines require the service temperature of titanium alloys to reach 600°C, while the limit service temperature of conventional titanium alloys is 600°C. At this temperature, some properties of the alloy deteriorate sharply, especially creep resistance and thermal stability. Meet the use requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The raw material composition and weight percentage of this alloy are:

[0018] Al 6%, Sn 2.5%, Zr 3%, W 0.25%, Si 0.35%, Y0.1%, and the rest are Ti and unavoidable impurities.

[0019] Preparation process: Three metals (particles or chips) of Al, Zr and Y with a purity of more than 99% and three master alloys of Ti-80Sn, Al-20W, and Al-10Si are used in weight percentages Al: 6%, Sn: 2.5 %, Zr: 3%, W: 0.25%, Si: 0.35%, Y: 0.1%, and the rest is prepared by Ti, and then pressed into a block electrode on a hydraulic press, and several electrodes are welded into long strips by plasma welding Shaped electrodes are then smelted in a vacuum consumable electric arc furnace for 2 to 3 times, and the smelted ingot is heated to 1100°C for forging, and finally made into rods of various specifications.

[0020] The alloy bar prepared in this embodiment has good comprehensive properties, especially excellent creep resistance and thermal stability:

[0021] Tensile properties at room...

Embodiment 2

[0026] The raw material composition and weight percentage of this alloy are:

[0027] Al 6.5%, Sn 3.5%, Zr 4%, W 0.35%, Si 0.45%, Y 0.15%, and the rest are Ti and unavoidable impurities.

[0028] Preparation process: Three metals (particles or chips) of Al, Zr and Y with a purity of more than 99% and three master alloys of Ti-80Sn, Al-20W, and Al-10Si are used in weight percentages Al: 6.5%, Sn: 3.5 %, Zr: 4%, W: 0.35%, Si: 0.45%, Y: 0.15%, and the rest is prepared by Ti, and then pressed into a block electrode on a hydraulic press, and several electrodes are welded into long strips by plasma welding shape electrode, and then smelting in a vacuum consumable electric arc furnace for 2 to 3 times, heating the melted ingot at 1150°C for forging, forging into slabs, and then rolling the slabs into plates of various thicknesses .

[0029] The alloy plate prepared in this embodiment has good comprehensive performance, especially excellent creep resistance and fatigue performance: ...

Embodiment 3

[0036] The raw material composition and weight percentage of this alloy are:

[0037] Al 5.5%, Sn 5%, Zr 7%, W 0.45%, Si 0.25%, Y 0.5%, and the rest are Ti and unavoidable impurities.

[0038] Preparation process: Three metals (particles or chips) of Al, Zr and Y with a purity of more than 99% and three master alloys of Ti-80Sn, Al-20W, and Al-10Si are used in weight percentages Al: 5.5%, Sn: 5 %, Zr: 7%, W: 0.45%, Si: 0.25%, Y: 0.5%, and the rest is prepared by Ti, and then pressed into a block electrode on a hydraulic press, and several electrodes are welded into long strips by plasma welding shape electrode, and then smelting in a vacuum consumable electric arc furnace for 2 to 3 times, heating the smelted ingot to 1200°C for forging, forging into a slab, and then rolling the slab into various thicknesses sheet.

[0039] The alloy plate prepared in this embodiment has good comprehensive properties, especially excellent creep resistance and fatigue performance at room temp...

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Abstract

This invention provides a high-temperature solid solution strengthened heat-resistant Ti alloy containing rare earth. The Ti alloy is composed of: Al 4.5-7.5 wt.%, Sn 1-5 wt.%, Zr 2-8 wt.%, W 0.25-0.8 wt.%, Si 0.2-0.5 wt.%, Y 0.05-0.5 wt.%, and Ti as well as impurities as balance. The Ti alloy has high creep resistance and high thermal stability, and can be used at 600 deg.C for a long time. Besides, the Ti alloy has excellent weldability, thus can be processed by vacuum electron beam welding or Ar arc welding with a welding strength coefficient higher than 90%.

Description

technical field [0001] The invention relates to a heat-resistant titanium alloy, in particular to a rare earth-containing high-temperature solid-solution strengthened heat-resistant titanium alloy used for manufacturing titanium alloy parts used in various high-temperature environments. Background technique [0002] Heat-resistant titanium alloys are advanced materials necessary for the manufacture of contemporary high-performance aero-engines. With the continuous improvement of engine performance, higher and higher requirements are put forward for the performance of heat-resistant titanium alloys. At present, advanced aero-engines require the service temperature of titanium alloys to reach 600°C, while the limit service temperature of conventional titanium alloys is 600°C. At this temperature, some properties of the alloy deteriorate sharply, especially creep resistance and thermal stability. Meet the use requirements. Contents of the invention [0003] The object of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00
Inventor 洪权杨冠军赵永庆曾立英戚运莲刘向郭萍
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH