用声发射方法对热风炉用钢在硝酸盐溶液中的应力腐蚀开裂过程进行了研究。试验结果表明,声发射规律与裂纹扩展规律是一致的,声发射计数率反映出应力腐蚀过程中裂纹扩展率与应力强度因子的三个过程,且声发射计数率与裂纹扩展率有着较好的对数线性关系,说明声发射可以监测裂纹扩展。 Acoustic emission method was used to study the stress corrosion cracking process of hot-blast furnace steel in nitrate solution. The experimental results show that the law of acoustic emission is consistent with the law of crack propagation. The acoustic emission count rate reflects the three processes of crack growth rate and stress intensity factor during stress corrosion cracking. The acoustic emission count rate and crack growth rate have good Logarithmic linear relationship, indicating that acoustic emission can be monitored for crack propagation.