Glass cloudburst treatment art for improving anti-stress corrosion performance of welding joint of stainless steel

Abstract

A glass grit blasting technology for increasing the stress corrosion resistance of the welded seam between stainless steels includes such steps as cleaning the surface of the welded seam, blasting the glass grits onto the welded seam by a blasting gun driven by compressed air and with an inclination by 70-100 deg.C, cleaning the surface of welded workpiece, and detecting the residual stress by X-ray diffractometer.

Description

technical field

[0001] The invention relates to a glass shot blasting treatment process for improving the stress corrosion resistance performance of stainless steel welded joints, which relates to a surface treatment method for reducing the stress corrosion cracking sensitivity of austenitic stainless steel welded joints. Background technique

[0002] In petrochemical, textile, paper, atomic energy, pharmaceutical, space navigation, and marine development sectors that use stainless steel, stress corrosion cracking accidents near welded joints account for about 47% of wet corrosion damage accidents. A large number of research results show that the existence of welding residual tensile stress is one of the main factors leading to stress corrosion cracking of austenitic stainless steel welded joints. Shot peening is an ideal method to eliminate the residual tensile stress of welding. It uses high-speed projectiles to spray the surface of welded joints to cause plastic deformati...

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