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亚温淬火方法可用来提高钢材的抗硫化氢应力破裂性能。本文介绍了用该方法对20钢进行试验的情况。当20钢经960°水淬+770℃亚温淬火+200℃回火处理,得到马氏体含量(V_M)约为50～60%时,该双相组织(马氏体+铁素体)具有良好的抗SSC性能。其σ_(ssa)(σ_(PH))M365MPa,此值不仅高于20钢正火状态的σ_s,而且高于淬火加高温回火状态的σ_s。
Sub-temperature quenching method can be used to improve the resistance to hydrogen sulfide stress rupture properties. This article describes the use of this method to test the case of 20 steel. When 20 steel is tempered by 960 ° water quenching + 770 ° C sub-tempered and tempering at 200 ° C to obtain a martensite content (V_M) of about 50-60%, the dual phase structure (martensite + ferrite) Has good anti-SSC performance. The σs (σ_ (PH)) M365MPa, this value is not only higher than 20 steel normalized σ_s, and higher than the quenching plus high temperature tempering σ_s.