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通过DIL805A热分析仪、扫描电子显微镜、电子背散射衍射、透射电子显微镜、力学分析等方法研究Mn对中锰耐磨钢组织形态、相变及力学性能的影响.随着Mn的质量分数以2%的增量从3%提高到9%,室温奥氏体含量逐渐增多,抗拉强度及硬度逐渐降低,抗拉强度和室温奥氏体体积分数都在5%到7%时变化明显,马氏体与奥氏体的位向关系发生改变,马氏体形态类型逐渐由亚结构以位错为主的板条状α马氏体变化为亚结构以位错、相变内孪晶和层错为主的束状细片α马氏体和细片状ε马氏体.
The effects of Mn on the microstructure, phase transformation and mechanical properties of the wear-resistant steel were investigated by means of DIL805A thermal analyzer, scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy and mechanical analysis.With the mass fraction of Mn2 % Increases from 3% to 9%, room temperature austenite content gradually increased, the tensile strength and hardness decreased, the tensile strength and room temperature austenite volume fraction of 5% to 7% change significantly, the horse The relationship between the orientation of the austenite and the austenite changes. The martensite morphological type gradually changes from lath-shaped α-martensite with sub-structure dislocation to sub-structure with dislocation, twins and layers within the phase transition The fault-based bundle of fine α-martensite and fine ε-martensite.