目的 通过离子渗氮和固溶复合处理制备深层含氮奥氏体不锈钢，获得硬度、耐蚀性和耐磨性等综合性能优良的奥氏体不锈钢。方法 将304奥氏体不锈钢试样放在LD-8CL型直流等离子体渗氮炉内，在400 Pa下进行560 ℃、4 h的离子渗氮处理，渗氮后进行1050 ℃、8 h的固溶处理。使用HXD-1000TMC型显微硬度计、DMI-3000M型金相显微镜、D/max-2500型X射线衍射仪（XRD）、Thermo250XI型X射线光电子能谱仪（XPS）、CS 350电化学测量系统和万能摩擦磨损试验机，对经过复合处理的304不锈钢的截面硬化梯度、截面组织、物相、表面成分、耐蚀性和耐磨性进行研究分析，验证此复合处理对获得硬度高、耐蚀性和耐磨性好等综合性能优良的奥氏体不锈钢的适用性。结果 经过复合处理，不锈钢表面的氮原子数分数为1.56 %，且为单一奥氏体相?N。?N所对应的衍射峰相对于不锈钢基体向左偏移，有效硬化层深达1.0 mm，不锈钢的表面硬度从基体的210HV0.025提高到308HV0.025。不但提高了深层含氮奥氏体不锈钢的耐磨性，而且提高了不锈钢的耐蚀性，腐蚀电位从基体的-0.534 V提高到-0.422 V，摩擦系数由基体的0.8降到0.7。结论 离子渗氮和固溶复合处理适用于制备综合性能优良的深层含氮奥氏体不锈钢。工艺设计时，可以根据材料服役要求，选择合适的固溶工艺，从而获得满足不同综合性能要求的含氮不锈钢。

The work aims to prepare deep nitriding austenitic stainless steel by a complex treatment of plasma nitriding and solid solution and then obtain the austenitic stainless steel with excellent comprehensive performance of hardness, corrosion re-sistance and wear resistance. 304 austenitic stainless steel was put in a LD-8CL D.C. plasma nitriding furnace and plasma nitriding treatment was conducted at 560 ℃ for 4 h in 400 Pa. Then, solid solution was carried out at 1050 ℃ for 8 h. In order to verify the applicability to get excellent comprehensive performance for stainless steel by this complex treatment, cross-sectional hardness profile, microstructure, phase constituents, surface composition, corrosion resistance and wear resistance of 304 stainless steel after the complex treatment were investigated and analyzed by HXD-1000TMC microhardness tester, DMI-3000M metallographic microscope, D/max-2500 X-ray diffraction (XRD), Thermo250XI X-ray photoelectron spectroscopy (XPS), CS 350 electrochemical workstation and universal friction tester. The stainless steel through complex treatment had single expanded austenite phase (γN) and the nitrogen atomic concentration was 1.56%. The corresponding peaks of γN shifted to the left to the stainless steel substrate. The effective hardening layer was 1.0 mm, and the surface hardness of the stainless steel increased from 210HV0.025 to 308HV0.025. Meanwhile, the complex treatment could improve the wear resistance and corrosion resistance of deep nitriding austenitic stainless steel. The corrosion potential increased from -0.534 V to -0.422 V and the friction coefficient of the nitrogenous steel decreased from 0.8 to 0.7. Complex treatment of plasma nitriding and solid solution can be used to prepare the deep nitriding stainless steel with excellent comprehensive performance. During technology design, appropriate solid solution parameters can be selected to prepare the nitriding stainless steel in conformity with various comprehensive performances based on the technical requirements of the components.