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本文研究了SCM435钢γ′单相离子渗氮层的组织构成和组织形态及其对性能的影响。研究结果表明,致密的γ′单相化合物层和扩散层中较宽的无脉网状组织区对强韧性做出了贡献。脉网状组织的实质是沿原奥氏体晶界分布的颗粒合金氮化物。用低氮势法和控制离子渗氮工艺因素,可在SCM435钢圆柱齿轮上获得强韧性良好的γ′单相离子渗氮层,且沿齿廓分布均匀,渗氮前后齿轮精度无变化。
In this paper, the microstructure, microstructure and microstructure of γ ’single phase nitriding layer of SCM435 steel were studied. The results show that the dense γ ’single-phase compound layer and the wider diffusion-free reticular tissue area contribute to the toughness. Vein reticular tissue is essentially along the original austenite grain boundary distribution of granular alloy nitride. With low nitrogen potential and controlling factors of ion nitriding, the γ ’single-phase ion nitriding layer with good toughness and good toughness can be obtained on the SCM435 steel gear. The gear distribution is uniform along the tooth profile without any change of gear accuracy before and after nitriding.