High-strength titanium alloy sealing head pressing technology

Abstract

The invention discloses a high-strength titanium alloy sealing head pressing technology. The high-strength titanium alloy sealing head pressing technology comprises the steps that a titanium sealing head plate blank is prepared, a technological plate is manufactured, a test plate is manufactured and heated, then prepressing is conducted on a pressing machine die, and the titanium sealing head plate blank and the technological plate are jointly subjected to sealing head pressing. The technological process is simple, the finished product qualification rate of a titanium sealing head is increased, the surface of the pressed titanium sealing head is bright and clean, and the local defects of cracks, scratches, indentations, pits and the like which do not exceed the thickness deviation of the titanium sealing head are avoided.

Description

technical field [0001] The invention relates to a head pressing process, in particular to a high-strength titanium alloy head pressing process. Background technique [0002] Titanium is an excellent ship material, and the shipbuilding industry of various countries attaches great importance to it, and has successively developed a series of marine titanium alloys. Titanium alloys are classified into low-strength alloys, medium-strength alloys and high-strength alloys according to their strength. Titanium alloys have the strongest specific strength and excellent corrosion resistance among metal materials, which can reduce weight significantly and improve the reliability and durability of equipment. And other advantages, it has a broad application prospect in the shipbuilding industry. [0003] Since titanium has many properties suitable for seawater environment materials, such as resistance to pitting and crack corrosion, stress corrosion resistance, galvanic corrosion resista...

AI Technical Summary

Problems solved by technology

[0005] For underwater titanium condensers, the seawater design pressure is up to 3Mpa. The end cover flange and head are not suitable for low and medium strength titanium alloys. The flange must be made of high strength titanium alloy, and the head must be pressed with high strength titanium alloy. .Due to the characteristics of titanium itself, coupled with high strength and large temperature drop, the cooling speed is faster in the external environment, the cooling is uneven, the deformation resistance is large, and cracks are easy to occur when the head is pressed. At present, there is no breakthrough in this technology in China.