铸铁激光处理后石墨周围的显微组织  

Microstructure around Graphite in Laser Treated Cast Iron

作　　者：朱祖昌[1] 俞少罗[1] 大基明 

机构地区：[1]上海工程技术大学,200335 [2]日本东京电机大学

出　　处：《现代铸铁》1997年第1期6-9,17,共5页Modern Cast Iron

基　　金：国家自然科学基金

摘　　要：研究球墨铸铁、灰铸铁和可锻铸铁激光熔融处理后存在于熔化区和半熔化区的残存石墨（即球状、片状和团絮状石墨）周围的双壳层组织．同时指出，在近灰铸铁激光熔池的相变硬化区中片状石墨周围马氏体量的不均匀分布情况。最后，提出了形成这些组织的机制。This paper puts mainly stress on the double-shell structure around the residual graphite (i. e. spheroidal, flake and temper-carbon graphite) of nodular cast iron,grey cast iron and malleable cast iron in the remelted zone and semi-remelted zone.It be also reported that there exists the heterogeneity of martensitic volume fraction around the flake graphite in the transformation hardening zone near the remelted pool. Meanwhile, the mechanisms of formation of these kinds of structure have been proposed.

关 键 词：铸铁 激光加工 显微组织 相变 

分 类 号：TG143[一般工业技术—材料科学与工程]