Plasma and Gaseous Nitrocarburizing of C60W Steel for Tribological Applications
来源期刊：材料热处理学报2004年第5期
论文作者：A.Shafyei M.Mirjani F.Ashrafizadeh
关键词：Gas Nitrocarburizing - Plasma Nitrocarburizing - C60W Steel - Tribology;
摘 要：A comparison has been made between plasma and gas nitrocarburizing processes for C60W steel in terms of structural features of the layers and the tribological properties of the specimens. Gaseous treatments were performed in a sealed quench industrial furnace in optimized process cycles. For plasma nitrocarburizing, a semi - industrial size unit was operated at a range of process parameters. Experimental results indicate that increasing the treatment time increases the thickness of the compound layer but lowers the wear resistance. Plasma treatment produced a more effective case depth compared with gaseous process, providing a better uniformity. Analysis of X-ray diffraction patterns indicated that the compound layer in gas nitrocarburizing consisted of both ε and γ' phases, whereas in plasma nitrocarburizing the ε phase was not detected.
A.Shafyei1，M.Mirjani2，F.Ashrafizadeh3
(1.Dept. of Materials Engineering,, Isfahan University of Technology, Isfahan, Iran;
2.Iranian Surface Research & Engineering Centre (ISREC;
3.Dept. of Materials Engineering, Isfahan University of Technology, Isfahan, Iran)
摘要:A comparison has been made between plasma and gas nitrocarburizing processes for C60W steel in terms of structural features of the layers and the tribological properties of the specimens. Gaseous treatments were performed in a sealed quench industrial furnace in optimized process cycles. For plasma nitrocarburizing, a semi - industrial size unit was operated at a range of process parameters. Experimental results indicate that increasing the treatment time increases the thickness of the compound layer but lowers the wear resistance. Plasma treatment produced a more effective case depth compared with gaseous process, providing a better uniformity. Analysis of X-ray diffraction patterns indicated that the compound layer in gas nitrocarburizing consisted of both ε and γ'' phases, whereas in plasma nitrocarburizing the ε phase was not detected.
关键词:Gas Nitrocarburizing - Plasma Nitrocarburizing - C60W Steel - Tribology;
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