Nuclear-grade threaded bushing finished product fatigue strength

Abstract

The invention relates to a nuclear-grade threaded bushing finished product fatigue strength. The technical scheme comprises that the size, the precision, the cross section size and the surface finish parameter of the threaded bushing are strictly controlled; the tolerance of the bolt is strictly controlled according to the national standard; the fatigue test is performed with the screw rod having the same material as the nuclear power and the bottom hole; the product obtained through the method is the alternative product, and the national independent technical standard is formed; the fatigue strength achieves the same level of the foreign products, can replace the import product, and can be subjected to fatigue test more than 200000 times; and the Chinese series threaded bushing products exist in the world nuclear power industry so as to break through the blocking on the product.

Description

technical field [0001] The invention relates to the field of nuclear power and can be applied to steam generators and voltage stabilizers, in particular to the fatigue strength of a nuclear-grade threaded bushing finished product. technical background [0002] In developed countries, nuclear power has been developed for decades. Today, in the context 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 also has a history of more than 40 years of development. Continuing the 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, the US Experimental Breeder Reactor No. 1 (EBR-1) first used nuclear power to generate electricity, the world's nuclear power has been developing...

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