Fracture Behavior of Cold Sprayed 304 Stainless Steel Coating During Cold Rolling

• Published in: Journal of iron and steel research, international Vol. 19; no. 11; pp. 57 - 63
• Main Authors: MENG, Xian-ming, ZHANG, Jun-bao, HAN, Wei, ZHAO, Jie
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.11.2012; Springer Singapore
• Subjects: 304 stainless steel coating; Applied and Technical Physics; Austenitic stainless steels; Coating; Cohesion; Cold rolling; cold spraying; Engineering; fracture; Fracture mechanics; Iron and steel industry; Machines; Manufacturing; Materials Engineering; Materials Science; Metallic Materials; microslructure; Physical Chemistry; Processes; Rolling direction; Stainless steels; 不锈钢涂层; 冷喷涂; 冷气动力喷涂; 冷轧过程; 断裂行为; 涂层表面; 裂纹分布; 轧制方向; 304 stainless steel coating; cold spraying; microslructure; cold rolling; fracture; microstructure
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(13)60021-7

The fracture behavior of cold sprayed 304 stainless steel coating in cold rolling process was studied. The 304 stainless steel coatings were deposited on low carbon steel substrate by cold gas dynamic spray (CGDS) and then cold rolled, respectively. The fracture morphology of the coatings was observed and analyzed, and the crack distributions along the longitudinal rolling direction of the coatings were also investigated and discussed. The results showed that the cohesive strength of the cold sprayed 304 stainless steel coating was too low to be cold rolled. Microcracks were formed in the as-sprayed coatings and ran perpendicularly to the rolling direction. The spacing distance between these cracks decreased with the increase of the cold rolling reduction. In addition, it was also found that the initial crack generated at the surface of the coating and propagated from the surface to the interface along the weakly bonded particles. A theoretical analysis was developed for the coating fracture. It gave a critical minimum cohesive bonding strength of the coating for non-breaking in cold rolling process. The crack propagation manner of the cold rolled coatings was also discussed.