Mechanical Properties of TiN Coating on Nanocrystalline Surface Layer of 304 Stainless Steel

摘要：

Surface nanocrystallization (SNC) can markedly improve surface mechanical properties of metallic materials and accelerate thermal diffusion of elemental atoms. In this work we study the effects of SNC on structure and mechanical properties of TiN coating on 304 stainless steel substrate. The steel was subjected to 15 min surface mechanical attrition treatment (SMAT) to obtain a nanocrystalline surface layer with thickness about 30 μm. TiN coating was deposited on the surface nanocrystallized and the coarse-grained steel substrates by multi-arc ion plating. X-ray diffraction shows that TiN(lll) orientation of the coating is much reduced due to SNC treatment. Mechanical tests show that the nanocrystalline surface layer has obviously increased surface hardness of the coating system; toughness and adhesion of the coating, impact resistance of the coating system are also improved. Advantages of SNC-hard coating processing over the conventional duplex treatment consisting of thermal diffusion process-hard coating are shortly discussed.

关键词： surface nanocrystallization stainless steel hard coating duplex treatment

作者: Wang Changpeng Zhou Yimin Zhu Xiaodong Fu Tao Ma Shengge

作者单位: State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xian 710049, Key Laboratory of Biomedical Infonvation Engineering of Ministry of Education, Xian Jiaotong Univer State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xian 710049, Shenzhen 863 Program Materials Surface Technology R&D Center, Shenzhen 518029, China

会议类型: 国际会议

会议名称: 第六届表面工程国际会议

会议地点: 西安

会议语种:英文

页码: 85-88

在线出版日期: 2011-05-11（万方平台首次上网日期，不代表论文的发表时间）