不锈钢低温盐浴表面氮化技术发展与现状

发布时间：2018-06-14 16:36

本文选题：盐浴氮化 + 不锈钢　；参考：《材料科学与工艺》2017年06期

【摘要】：不锈钢具有良好的耐蚀性、韧性和可加工性,但其硬度低、耐磨性差,严重制约了其在有磨损腐蚀要求环境体系中的应用.为了提高不锈钢的抗磨损性能,通过低温活性盐浴表面处理技术提高其耐磨性的同时不降低其耐蚀性,使得其在具有磨损的腐蚀介质环境中能够提高其抗磨损性能而不被腐蚀,可延长其使用寿命.本文系统地介绍了低温活性盐浴表面氮化处理技术的发展、原理及应用和处理后表面氮化层的特点、组织和表面性能.低温活性盐浴表面处理后,表层活性N原子扩散在奥氏体间隙中形成过饱和固溶体的S-相,产生特殊的位错-应力FCC结构,使得奥氏体晶格发生严重变形,不但提高了其腐蚀性,同时大大提高了其硬度,使得不锈钢硬度能够达到1 000 HV0.1,其抗磨损性能亦得到了显著提高.
[Abstract]:Stainless steel has good corrosion resistance, toughness and processability, but its hardness is low, wear resistance is poor, which seriously restricts its application in environmental system with wear corrosion requirements. In order to improve the wear resistance of stainless steel, the wear resistance of stainless steel can be improved by low temperature active salt bath surface treatment technology without decreasing its corrosion resistance, so that the wear resistance of stainless steel can be improved without being corroded in corrosive medium environment. Can prolong its service life. In this paper, the development, principle and application of low temperature active salt bath surface nitridation technology are systematically introduced. The characteristics, microstructure and surface properties of the nitrided layer after treatment are also introduced. After surface treatment with low temperature active salt bath, the surface active N atoms diffuse in the space of austenite to form S- phase of supersaturated solid solution, resulting in special dislocation stress FCC structure, resulting in serious deformation of austenite lattice. The hardness of stainless steel can reach 1 000 HV0.1, and the wear resistance of stainless steel is also improved significantly.
【作者单位】：四川大学制造科学与工程学院;中核核电运行管理有限公司;反应堆燃料及材料重点实验室(中国核动力研究设计院);上海核工程研究设计院;
【基金】：核燃料及材料重点实验室开发课题(STRFML-2015) 国家自然科学基金资助项目(51471112) 自然科学基金中英联合交流基金(5151101433) 四川省科技计划项目(2016GZ0173)
【分类号】：TG174.4

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