| 1 | Microstructure and Properties of Low Temperature Composite Chromized Layer on H13 Tool Steel显示文摘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 that the composite chromized layer contained such nitrides and carbides of chromium as CrN, Cr2N, (Cr, Fe)23C6, and (Cr, Fe)7C3, 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. | Cuilan WU, Chengping LUO and Ganfeng ZOU College of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China | 2005 | Journal of Materials Science & Technology2005，21，2： | 9 |
| 2 | A Novel Duplex Low-temperature Chromizing Process at 500℃显示文摘在 500 °C 的一个优化低温度的渗铬过程经由由先锋血浆 nitriding 组成的一个双渗铬过程与 0.45 wt %碳在平凡的中等碳的钢上被认识到,并且跟随的盐洗澡 thermoreactive 免职和散开( TRD )有薄散开层的渗铬 process.CrN 层在下面被形成。双渗铬过程被光显微镜学(OM ) 学习,扫描电子显微镜学(SEM ) ,精力散 X 光检查光谱学(版本) , X 光检查衍射(XRD ) ,和传播电子显微镜学(TEM ) 。在 500 °C 的渗铬速度被增加更多的 Cr-Fe 粉末进盐洗澡成功地提高,这被发现,并且 CrN 层在厚度与一般水准 8.1 亩 m 以优先的氮化物混合物 layer.A CrN 层的成本形成了,在微坚硬的 1382 HV_( 0.01 )被双渗铬更为 24 h.Further 在 500 °C 在底层上形成, CrN 层由 nanocrystalline CrN 谷物组成了。 | Huiliang CAO Cuilan WU Jiangwen LIU Chengping LUO Ganfeng ZOU | 2007 | Journal of Materials Science & Technology2007，23，6： | 3 |
您所在的机构暂未开通此部分的功能，请联系管理员