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高强度钢及超高强度钢的应用范围很广,但由于其高的应力腐蚀开裂(SCC)敏感性而限制了应用.高强度钢的SCC至少已研究了六十余年,但其断裂机理尚未弄清.Troiano、Sandoz、Brown等认为高强度钢在水介质中的SCC是氢脆(HE)行为;但是,Parkins认为,在阳极极化条件下,高强度钢的SCC机理仍是HE的解释是值得怀疑的,在这种情况下,氢故然是一个影响因素,但不应该将活性通道的溶解(APC)放在次要地位,应该考虑局部的阳极溶解机理.因此,关于高强度钢的SCC机理还必须进行深入的研究.我们在研究σ_8=90kgf/mm~2的低合金结构
High-strength steels and ultrahigh-strength steels are used in a wide range of applications, but their applications are limited by their high SCC susceptibility. The SCC for high-strength steels has been studied for at least 60 years but the fracture mechanism However, Parkins argues that the SCC mechanism of high-strength steels is still HE under anodic polarization Interpretation is questionable, in which case hydrogen is a contributing factor, but should not be placed in the secondary position of active channel dissolution (APC), and local anodic dissolution mechanisms should be considered. Therefore, with regard to high strength The SCC mechanism of steel must also be studied in depth.We study the low alloy structure of σ_8 = 90kgf / mm ~ 2