SPV50Q钢的应力腐蚀开裂实验研究  

Experimental Study on Stress Corrosion Cracking of SPV50Q Steel

作　　者：尹香琴 孔凡玉 陈玮玮 沈红威 刘辉 YIN Xiangqin;KONG Fanyu;CHEN Weiwei;SHEN Hongwei;LIU Hui(Zhejiang Key Laboratory of Furniture Testing Technology,College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学质量与安全工程学院浙江省家具检测技术研究重点实验室

出　　处：《热加工工艺》2018年第18期254-257,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51104134);浙江省自然科学基金项目(LY14E040001)

摘　　要：基于线弹性断裂力学的方法,以SPV50Q钢材为研究对象,选用不同部位的M-WOL楔形张开加载预裂纹试样,对其在不同硫化氢体积分数及不同状态条件下的应力腐蚀开裂性能进行研究。测定出应力腐蚀裂纹扩展速率da/dt和应力腐蚀开裂临界强度因子KISCC。结果表明：随着硫化氢体积分数的减小,SPV50Q钢的应力腐蚀裂纹扩展速率da/dt降低,应力腐蚀临界应力强度因子KISCC增大。对SPV50Q钢进行热处理后在一定程度上能降低裂纹扩展速率da/dt,同时可提高硫化氢环境下的抗应力腐蚀开裂能力。Based on the method of linear elastic fracture mechanics,taking SPV50Q steel as research object and selecting M-WOL pre-cracked specimens in different position,the stress corrosion cracking properties under different hydrogen sulfide volume fractions and different states were studied,and the stress corrosion crack growth rate da/dt and critical stress corrosion cracking strength factor K_（ISCC）were determined.The results show that with the decrease of hydrogen sulfide volume fraction,the stress corrosion crack growth rate da/dt of SPV50Q steel decrease,and the stress corrosion cracking critical strength factor K_（ISCC）increases.After heat treatment of SPV50Q steel,the crack growth rate da/dt reduces to a certain extent,and the ability of stress corrosion cracking resistance in hydrogen sulfide environment improves.

关 键 词：湿硫化氢环境 应力腐蚀 裂纹扩展速率 应力强度因子 

分 类 号：TG172[金属学及工艺—金属表面处理]