Microstructure and Properties of Low Temperature Composite Chromized Layer on H13 Tool Steel材料科学技术学报：英文版论文
【题名】：Microstructure and Properties of Low Temperature Composite Chromized Layer on H13 Tool Steel材料科学技术学报：英文版论文(Microstructure and Properties of Low Temperature Composite Chromized Layer on H13 Tool SteelCaiLiaoKeXueJiShuXueBao：YingWenBanLunWen) 【关键词】：H13工具钢 显微结构 低温渗铬 耐磨性 【keywords】：H13GongJuGang XianWeiJieGou DiWenShenGe NaiMoXing 【作者】：CuilanWU ChengpingLUO GanfengZOU      【来源】： 知识词典 【期刊名称】：材料科学技术学报：英文版(CaiLiaoKeXueJiShuXueBao：YingWenBan) 【国际标准刊号】：1005-0302        【国内统一刊号】：21-1315 【作者单位】：CollegeofMechanicalEngineering,SouthChinaUniversityofTechnology,Guangzhou510641,China(CollegeofMechanicalEngineering,SouthChinaUniversityofTechnology,Guangzhou510641,China) 【分类号】：TG174.445 TG142.45      【页码】：-251-255      【出版年】：2005.2 【下载地址】：下载pdf全文         Low temperature composite chromizing is a process composed of a plain ion-carbonitriding or ion-nitriding at 550-580℃, followed by a low-temperature chromizing in a salt-bath of 590℃. The microstructure and properties of the low temperature composite chromized layer on H13 tool steel were investigated using metallography,X-ray diffraction, microanalysis, hardness and wear tests. It was found that this low temperature process was thermodynamically and kinetically possible, and the composite chromized layer on H13 steel, with a thickness of 3-6μm,consisted of three sub-layers (bands), viz. the outer Cr-rich one, the intermediate (black) one, and the inner, original white layer. After chromizing, the former diffusion layer was thickened. The results of X-ray diffraction showed thatthe composite chromized layer contained such nitrides and carbides of chromium as CrN, Cr2N, (Cr, Fe)23C6, and(Cr, Fe)TC3, as well as plain α-(Fe, Cr). A high surface microhardness of 1450-1550 HV0.025, which is much higher than that obtained by the conventional ion carbonitriding and ion nitriding, was obtained. In addition, an excellent wear resistance was gained on the composite chromized layer.
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