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《Journal of Iron and Steel Research》 1993-01
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Lin Huachun, Ding Rungang Qingdao Institute of Architecture & Engineering  
The microstructures of the hardened layer on 45 steel after plasma melting were examined by SEM, TEM and x-ray diffractometcr. The e xperimental results show that the microstructure of the surface layer is fine martensite and partly non-crystalline. The fine-martensite in surface layer consists of lath and slab substructures. The martensite with high dislocation density locates mainly along the boundary zone of lath substructure. The process of phase transformation during plasma treatment was discussed.
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