采用应力环试验研究了在H2S环境下，喷丸强化及其后处理技术对X80管线钢焊接接头应力腐蚀开裂（SCC）行为的影响和喷丸强化及其后处理前后焊接接头的显微组织结构变化.结果表明：由于残余压应力和晶粒细化的共同作用，喷丸强化能有效改善X80钢焊接接头抗SCC的能力；若喷丸强化后再表面磨光，则可以进一步改善喷丸强化提高SCC抗力的效果.
The influence of shot peening on stress corrosion cracking (SCC) behavior of X80 pipeline steel weld joint was investigated by the stress ring test.Microstructure of X80 steel welded joint after shot peening and post heat-treatment was examined.The results showed that the SCC resistance (SCCR) of the weld joints of pipeline steel X80 could be effectively improved by shot peening.The SCCR could be further improved by promptly polishing the surface after shot peening.
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