Production process of high-strength Ti75 titanium ring

Abstract

The invention discloses a production process of a high-strength Ti75 titanium ring. The production process comprises the following steps: materials are fed; inspection is carried out; for the first fire, 4500 T equipment is used, preheating is conducted for 1.8-2.2 hours at the temperature of 750-850 DEG C, then the temperature is increased to 1,110-1,150 DEG C, the heat preservation time is 400-460 min, and the temperature rise rate is kept at 10 DEG C / min in the temperature rise process; for the second fire, 2000T equipment is used, and heat preservation is carried out for 215-245 minutes at the temperature of 970-1,000 DEG C; for the third fire, 2000T equipment is used, and heat preservation is conducted for 215-245 min at the temperature of 930-955 DEG C; for the fourth fire, 2000T equipment is used, and heat preservation is conducted for 215-245 min at the temperature of 900-928 DEG C; for the fifth fire, 2000T equipment is used for the fifth fire, the overall remelting temperature is increased to 890-910 DEG C, and the heating time is 20-40 minutes; for the sixth fire, a 2000 T device is used, and mandrel drawing and mandrel supporter reaming are conducted at the temperature of 860-895 DEG C; for the seventh fire, heat preservation is conducted for 15-25 min at the temperature of 700-740 DEG C, and stress relief annealing is conducted; The tensile strength, the yield strength, the elongation, the shrinkage rate, the impact strength and the hardness of the Ti75 titanium ring obtained through the production process are all superior to those of an existing Ti75 titanium ring, and the Ti75 titanium ring has the advantage of being high in strength.

Description

technical field

[0001] The invention relates to the technical field of nonferrous metal production technology, in particular to a production technology of Ti75 titanium ring. Background technique

[0002] Ti75 titanium alloy is a medium-strength, high-temperature-resistant, corrosion-resistant, hydrogen-brittle-resistant Ti-Al-Mo-Zr titanium alloy designed and developed by my country. In ships; Ti75 titanium alloy is the preferred material. Due to the large size and weight of ship parts, large-scale titanium alloy blanks are gradually used to prepare pressure vessels, pressure shells, rings and shafts. However, the strength of the Ti75 titanium ring obtained by the existing production process of the Ti75 titanium ring is not high enough, so it is urgent to solve this problem. Contents of the invention

[0003] In order to solve the problem that the strength of the Ti75 titanium ring obtained by the existing production process of the Ti75 titanium ring is not high enough, th...

Images