High performance titanium connecting sealing ring for deep-sea oil drilling and production device and processing method

A processing method for a titanium connecting sealing ring, comprising:

• (a) a step of preparing a titanium sponge, comprising:
• drying the titanium sponge;
• (b) a step of vacuum melting of a titanium ingot, comprising:
• (i) pressing the dried sponge titanium into an electrode block,
• (ii) welding the electrode block into a melting electrode by argon-arc welding,
• (iii) vacuum melting the melting electrode;
• and
• (iv) cooling the melting electrode after vacuum melting, and sampling for chemical analysis, wherein a titanium ingot is formed;
• (c) a step of forging and pressing, comprising:
• (i) heating the titanium ingot to 950° C.-1200° C. and preserving heat for 250 min-380 min,
• (ii) forming a long titanium billet, and
• (iii) sawing and forging the long titanium billet into a small titanium billet according to a specification;
• (d) a step of hot forging, comprising three stages:
• in a first stage:
• heating the small titanium billet to 760° C.-900° C.,
• forging the small titanium billet to obtain a desired blank,
• punching the desired blank to form a center hole to obtain a cavity blank,
• cooling the cavity blank, and
• grinding the cavity blank for a first time;
• in a second stage:
• heating the cavity blank, after the grinding for the first time, to 800° C.-900° C.,
• forging and preserving heat for 100 min-140 min,
• reaming the cavity blank,
• cooling the cavity blank, and
• grinding the cavity blank for a second time;
• and
• in a third stage:
• heating the cavity blank, after the grinding for the second time, to 810° C.-880° C.,
• forging and preserving heat for 100 min-140 min, and
• forging the cavity blank to form a titanium connection sealing ring blank;
• (e) a step of heat treatment, comprising:
• (i) heating the titanium connecting sealing ring blank to 650° C.-700° C. in a non-vacuum condition and preserving heat for 100 min-140 min, and
• (ii) cooling the titanium connecting sealing ring blank and entering a machining step;
• and
• (f) wherein the machining step comprises:
• machining, by a machining tool, the titanium connecting sealing ring blank into a titanium connecting sealing ring, wherein the titanium connecting sealing ring includes a convex plate, a platform, an inclined end surface, a flat end surface, and the center hole.