【摘要】 对含碳0.2％钢激光淬火区进行了透射电镜观察。结果表明,在激光淬火区存在高位错密度低碳板条马氏体。在某些板条中存在贯穿整个板条宽度的密排孪晶组织。这种碳素板条马氏体孪晶组织很少报道。残余奥氏体呈薄膜状分布在马氏体板条之间。马氏体与残余奥氏体之间符合K—S关系。更多还原

【Abstract】 Laser processing areas of steel containing 0.2% carbon was inverstigated using TEM. It showed that the microstructure of laser processing areas was lath martensite. The substracture in the lathes was dislocations and twins. Some of twins fraversed lathes of the martesite. This kind of twin in the low carbon steel has rarely been observed before. A large amount of thin films of retained austennite was distributed between the lathes of themartensite. Analysis of the diffraction pattern showed the orientation between austennite and martensite exhibiting Kurdjumoo-Sachs relationship.更多还原