Light-weight, high-strength, and high-elasticity titanium alloy and implementation method thereof

Abstract

A light-weight, high-strength, and high-elasticity titanium alloy and an implementation method thereof. The titanium alloy is specifically Ti-8Al-2V-1Cr-0.75Zr, wherein the content of Al is 7.0% to 9.5%, the content of V is 0.5% to 4.0%, the content of Cr is 0.5% to 3.5%, the content of Zr is 0.5% to 2.0%, and the balance is Ti. The titanium alloy is obtained by vacuum arc remelting(VAR), after mold pressing through the adoption of sponge titanium, vanadium, chromium, aluminum zirconium pure, pure aluminum, aluminum vanadium alloy mixed consumable electrode. The titanium alloy is simple in preparation processing steps, low in processing cost, easy in production, and is applicable to various application fields with a requirement for a low-density and high-strength titanium alloy.

What is claimed is: 
     
         1 . A light-weight, high-strength, and high-elasticity titanium alloy SJ1100, specifically Ti-8Al-2V-1Cr-0.75Zr, wherein the content of Al is 7.0% to 9.5%, the content of V is 0.5% to 4.0%, the content of Cr is 0.5% to 3.5%, the content of Zr is 0.5% to 2.0%, and the balance is Ti. 
     
     
         2 . The titanium alloy SJ1100 according to  claim 1 , wherein a composition and content thereof were as follows: the content of Al is 7.0% to 9.0%, the content of V is 0.5% to 3.5%, the content of Cr is 0.5% to 3.0%, the content of Zr is 0.5% to 1.8%, and the balance is Ti. 
     
     
         3 . A method of preparing the light-weight, high-strength, and high-elasticity titanium alloy SJ1100 according to  claim 1 , the method comprising: through the adoption of sponge titanium, vanadium, chromium, aluminum zirconium pure, pure aluminum, aluminum vanadium alloy mixed consumable electrode, obtaining an alloy ingot by vacuum arc remelting (VAR) after mold pressing; performing cogging and forging on the alloy ingot under heating insulating at a temperature of 1000° C. to 1200° C.; performing blanking forging at 900° C. to 1100° C.; performing forging or rolling at 850° C. to 1000° C.; performing cold rolling after annealing treatment on a forged finished product or a hot-rolled sheet to obtain a finished product; annealing the finished product at 600° C. to 900° C.; and finally performing pickling to prepare a titanium alloy finished product. 
     
     
         4 . The method according to  claim 3 , wherein the purity of the sponge titanium which is a sponge metal titanium produced by a metal thermal reduction method is 99.1% to 99.7%. 
     
     
         5 . The method according to  claim 3 , wherein the temperature of the cogging and forging is 1000° C. to 1180° C., the temperature of the blanking forging is 900° C. to 1080° C., the temperature of the forging or rolling is 850° C. to 990° C., the temperature of the annealing is 620° C. to 880° C., and the time of the annealing is 0.5 h to 2 h. 
     
     
         6 . The method according to  claim 3 , wherein a process of the forging specifically includes: forging the alloy ingot to a tetragonal body; sequentially forging into a hexagonal and an octagonal cross section; and finally forging to prepare a blank, wherein an alloy forging or rolling temperature is 850° C. to 990° C. and a deformation amount is 60% to 80%. 
     
     
         7 . The method according to  claim 3 , wherein the rolling includes cold rolling after annealing and a deformation amount thereof is 25% to 40%. 
     
     
         8 . The method according to  claim 3 , wherein the alloy ingot is subjected to the cogging and forging under heating insulating at 1000° C. to 1200° C. and is subjected to the forging and blanking forging at 900° C. to 1100° C. 
     
     
         9 . The method according to  claim 3 , wherein specific temperature parameters of the forging are as follows: the temperature of feeding the alloy ingot into a furnace is 600° C. to 900° C. and the time for the heat insulating is 1 h to 4 h; after the heat insulating, the temperature is increased for 2 h to 4 h to 1100° C. to 1200° C., and the time for further heat insulating is 3 h to 7 h; and the temperature of returning to the furnace is 1000° C. to 1100° C. and the temperature of third returning to the furnace is 900° C. to 1000° C. 
     
     
         10 . The method according to  claim 3 , wherein the temperature of the pickling is 400° C. to 550° C., and the time is 5 minutes to 30 minutes.