Research on Two-phase Region Heat Treatment of ZG14CrNi3MoV Marine Cast Steel
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摘要: 对比了"单相区淬火+两相区淬火+高温回火"和"单相区保温+缓冷进入两相区+高温回火"和"两相区直接淬火+高温回火"3种热处理工艺对船用ZG14CrNi3MoV铸钢显微组织和力学性能的影响。结果表明,ZG14CrNi3MoV铸钢采用"单相区淬火+两相区淬火+高温回火"工艺进行热处理后,组织为铁素体+回火索氏体混合组织,强韧性匹配良好。Abstract: The effects of three heat treatment processes of the ZG14CrNi3MoV cast steel microstructure and mechanical properties were compared, which were "single-phase zone quenching+two-phase zone quenching+high temperature tempering", "single-phase zone insulation+slow cooling into two-phase zone+high temperature tempering", "two-phase zone quenching+high temperature tempering". The results show that the two-phase zone heat treatment process has a great influence on the microstructure and mechanical properties of ZG14CrNi3MoV cast steel. The heat treatment process of "single-phase zone quenching+two-phase zone quenching+high temperature tempering" is adopted. The microstructure of cast steel is ferrite and tempered sorbite, and the strength and toughness match well.
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Keywords:
- cast steel /
- two-phase region /
- yield strength /
- low temperature toughness
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