热轧双层复合铁基合金的CD渗碳  

Carbide Dispersion Carburization of Two-layered Iron Based Alloy by Rolling-cladding

作　　者：刘杨[1] 王殿梁[1] 孙振岩[1] 赵刚[1] 郝士明[1] 高彩茹[2] 刘相华[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]东北大学连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《材料热处理学报》2002年第3期47-51,共5页Transactions of Materials and Heat Treatment

基　　金：辽宁省科学技术基金资助项目 ( 9810 30 0 30 1)

摘　　要：研究了 50钢与Fe V合金复合轧制双层材料CD渗碳层的组织与性能。结果表明 ,热轧态复合界面 50钢一侧由于碳的扩散出现厚度约 50 μm的铁素体区。在随后的CD渗碳过程中 ,铁素体区消失。复合界面两侧组织差异不大。在Fe V合金复合层渗透的情况下 ,自Fe V合金表面经界面至 50钢内部 ,硬度梯度平缓。Fe V合金层在 950℃、1 40 %C碳势下渗碳 5h ,表面无Fe3 C析出 ,淬火后可获得高硬度渗层组织。渗层表面为马氏体基体和弥散的碳化物 ,尺寸为 1 0 0nm左右。Fe 1 69%V合金渗层表面硬度高达 82 5HV ,超过淬火、回火后的Cr1Microstructure and mechanical properties of the rolling\|cladding 50 steel and Fe\|V alloy have been studied after CD carburization. The results show that ferrite zone of 50μm thickness appeared on the side of 50 steel at the rolling\|cladding interface due to the carbon atoms diffusion after hot rolling\|cladding. During CD carburization, ferrite zone disappeared due to the diffusion of carbon atoms from interface to the inner sections. The microstructures on both sides of the interface have little difference and their binding is good. Hardness of the specimen does not have a sudden change from the surface of Fe\|V alloy to the side of 50 steel. Fe\-3C did not appear at the surface of Fe\|V alloy after carbonizing at 950℃ for 5h with the controlled C content is 1.40%. The microstructure of carbonized layer with high hardness obtained after quenching is martensite with dispersed equiaxed carbides, the size of which is about 100nm. The hardness of carbonized layer of Fe\|1.69%V alloy reaches 825HV, which is higher than that of Cr12MoV steel after quenching and low temperature tempering.

关 键 词：热轧双层复合铁基合金 CD渗碳 Fe-V合金 复合界面 

分 类 号：TG161[金属学及工艺—热处理] TG156.81[金属学及工艺—金属学]