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五、试验结果和分析讨论——低温回火态1.复合组织的常规力学性能和断裂韧性亚温淬火所得铁素体和马氏体两相复合组织经200℃2小时低温回火后得到铁素体和回火马氏体组织,仍保留亚温淬火后的组织形态。表4为低温回火状态下30CrMnSiA钢含不同铁素体量的各种复合组织的常规力学
V. TEST RESULTS AND DISCUSSION AND DISCUSSION - Low Temperature Tempering 1. Conventional Mechanical Properties and Fracture Toughness of Composite Structure Subgrades of ferrite and martensite obtained from sub-temperature quenching are obtained after 2 hours of low temperature tempering at 200 ℃ Element and tempered martensite, still retained after the warm temperate microstructure. Table 4 for the low-temperature tempering state 30CrMnSiA steel with different ferrite content of a variety of conventional mechanical composite structure