A 1300mpa grade ultra-high strength structural titanium alloy

Abstract

A 1300MPa-level ultra-high-strength structural titanium alloy relates to a near-β titanium alloy, which has the potential to be used in load-bearing structural parts of aircraft. It is characterized in that the weight percent composition of the alloy is Al: 4%-5.5%, Zr: 2%-4%, Mo: 4%-6%, V: 3%-5%, Cr: 2%-3%, and the rest The amount is Ti and unavoidable impurities. Finished alloy forgings are treated by 770~860℃ / 1-2h air cooling +540-620℃ / 4-8h air cooling or 810-830℃ / 2-3h cooling to 750-770℃ / 2-4h air cooling +540-570℃ / 4-8h air cooling treatment use. Alloy finished forgings have high tensile plasticity and fracture toughness while maintaining high strength after strengthening heat treatment.

Description

A 1300MPa-class ultra-high-strength structural titanium alloy technical field A kind of 1300MPa grade ultra-high-strength structure titanium alloy relates to a kind of near β titanium alloy, and this alloy has the potential to be used for flying The load-bearing structural parts of the traveler and as forgings, bars, plates and other application fields. Background technique The density of titanium alloy is low, and specific strength is high, has higher thermal strength and durable strength again, and has good corrosion resistance. This series of advantages makes it gain important application in aerospace industry. Currently, the most widely used It is still an α-β titanium alloy with medium strength but good comprehensive performance represented by Ti-6Al-4V. The requirements for faster, more advanced, and more energy-efficient devices have prompted us to develop structural titanium alloys with higher specific strength. foreign pair The research on high-strength...

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