摘要
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 morphology,phase transformation and mechanical properties of medium manganese wear resistant steel were investigated by DIL805 A thermal analyzer,scanning electron microscopy,electron back-scattered diffraction,transmission electron microscopy and mechanical testing. When the mass fraction of Mn increases from 3% to 9% by a 2%increment,the volume fraction of austenite at room temperature gradually increases. The tensile strength and hardness decrease especially at the mass fraction of Mn from 5% to 7%. The orientation relationship between martensite and austenite varies. The morphology and type of martensite change from lath α martensite whose substructure is mainly dislocations to bunchy laminar α martensite and laminar ε martensite whose substructure is mainly dislocations,twins through phase transition and stacking faults.
出处
《工程科学学报》
EI
CSCD
北大核心
2016年第1期64-70,共7页
Chinese Journal of Engineering
基金
国家高技术研究发展计划资助项目(2012AA03A508)
中央高校基本科研业务费(FRF-UM-15-001)
关键词
耐磨钢
锰
形态
相变
力学性能
wear resistant steel
manganese
morphology
phase transformation
mechanical properties
