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从温度、时间、氨气流量和混合气(乙醇和二硫化碳混合液)流量方面研究2Cr13不锈钢氮碳氧硫变温离子共渗工艺,寻找最优的共渗参数,并与常规离子渗氮和变温离子渗氮相比较。利用显微硬度计、金相显微镜、X射线衍射仪和电化学工作站对试样进行分析。结果表明:2Cr13钢经535℃变温共渗8 h,氨气流量1.5 L/min,混合气流量0.25 L/min变温离子共渗处理,表面硬度达到硬化要求,共渗层厚度0.28 mm,梯度平缓;共渗层中微量的Fe3O4可降低摩擦系数,FeS具有储油减磨的特性,使工件耐磨性更好;另外,其耐腐蚀性略低于常规离子渗氮。
From the aspects of temperature, time, ammonia flow rate and flow rate of mixed gas (mixture of ethanol and carbon disulfide), the optimum conditions for osmosis of 2Cr13 stainless steel were investigated and compared with conventional ion nitriding and temperature changing ion Nitriding compared. Samples were analyzed using a microhardness tester, a metallographic microscope, an X-ray diffractometer and an electrochemical workstation. The results show that the surface hardness of 2Cr13 steel reaches the requirement of hardening after the temperature is 535 ℃ for 8 h, the ammonia flow rate is 1.5 L / min and the mixed gas flow rate is 0.25 L / min. ; Fe3O4 in co-permeable layer can reduce the friction coefficient, FeS has the characteristics of oil storage and anti-wear, so that the workpiece wear resistance better; In addition, the corrosion resistance slightly lower than the conventional ion nitriding.