Technical method for comprehensively forming finished product hardness of nuclear-grade threaded bush

Abstract

The invention discloses a technical method for comprehensively forming finished product hardness of a nuclear-grade threaded bush. There is provided with a variable-frequency speed controlling power device for constant-speed wire rolling; a dedicated drawing technique is adopted; dedicated rollers are invented to enable the rolling area to be even and enable a wire to be uniformly stressed; and heat treatment is carried out by adopting special heat treatment time according to initial hardness, so as to achieve the hardness dedicated for nuclear power generation. The product obtained by the technical method is a substitute product, and independent technology standards of China are formed. Defects that the conventional products are uneven in hardness, easy to deform and short in service life, and cause damages to threaded holes of the threaded bush are overcome. China now has its own series of threaded bush products among world nuclear power industries, and block of the threaded bush by foreign countries is broken.

Description

technical field [0001] The invention relates to the field of nuclear power, can be applied to steam generators and voltage stabilizers, and specifically relates to a technical method for comprehensively forming the hardness of nuclear-grade threaded bushings. [0002] technical background [0003] In developed countries, nuclear power has been developed for decades. Today, under the background of energy shortage and global warming, nuclear power has become a mature energy source, and the development of nuclear power has become an important strategic choice. China's nuclear industry has a history of more than 40 years of development. Continued development of nuclear power is an inevitable requirement for the sustainable development of my country's economy and the improvement of people's living standards. Development of nuclear power technology: since December 1951, when the US Experimental Breeder Reactor No. 1 (EBR-1) first used nuclear energy to generate electricity, the wo...

AI Technical Summary

Problems solved by technology

Due to the special structure and shape of the product, in the process of processing the inner hole and thread of the special bushing for the pipe seat products, the middle diameter is often out of tolerance, and the teeth are rotten, and the formed threaded hole has burrs, corrugations, etc., resulting in The roughness of the thread is not good, the position of the threaded hole is not good, etc., which seriously affect the quality of the product

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