Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (3): 249-254.DOI: 10.11890/1006-7191-113-249

• 研究论文 • 上一篇    

Fracture behavior of the 304 stainless steel coatings by cold gas dynamic spraying

韩玮1,赵杰2   

  1. 1. 大连理工大学
    2. 大连理工大学材料科学与工程学院 邮编116024
  • 收稿日期:2010-12-01 修回日期:2011-02-22 出版日期:2011-06-25 发布日期:2011-06-13
  • 通讯作者: 赵杰

Fracture behavior of 304 stainless steel coatings by cold gas dynamic spray

,Wei HAN1, Xianming MENG1, Jie ZHAO1, Junbao ZHANG2   

  1. 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China
    2. Baosteel Research Institute, Baoshan Iron & Steel Co.,Ltd., Shanghai 201900, China
  • Received:2010-12-01 Revised:2011-02-22 Online:2011-06-25 Published:2011-06-13
  • Contact: Jie ZHAO

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Abstract: 304 stainless steel coating was deposited on the Interstitial-Free steel substrate by cold gas dynamic spraying (CGDS). Three-point bending test of the cold sprayed 304 stainless steel coating was tested by SHIMADZU electro-hydraulic servo-controlled fatigue testing machine and the fracture morphology was examined by scanning electron microscopy. The results showed that the fracture behavior of the cold sprayed 304 stainless steel coating was brittleness fracture. The crack in the coating occurred in the interfaces between particles and the crack extended to the internal of the coating with the increase of the load. When the crack has extended to the combination interface between coating and substrate, the crack extended to the two sides. The microstructure and mechanical property of the cold sprayed 304 stainless steel coating have been optimized after heat treatment.

Key words: Cold gas dynamic spraying, 304 stainless steel coating, Three-point bending test, Fracture behavior, Heat treatment