变形温度对冷喷涂304不锈钢涂层材料高温变形行为的影响

金属学报, 2013, 49(10): 1275-1280. doi: 10.3724/SP.J.1037.2013.00241

变形温度对冷喷涂304不锈钢涂层材料高温变形行为的影响

1.大连理工大学材料科学与工程学院,大连,116085

2.宝山钢铁股份有限公司研究院,上海,201900

3.大连理工大学材料科学与工程学院,大连,116085

4.大连理工大学材料科学与工程学院,大连,116085

基金项目: 国家重点基础研究发展计划项目2012CB932203,国家自然科学基金项目51171037和51134013资助 National Natural Science Foundation of China(.51171037 and 51134013) National Basic Research Program of China(2012CB932203)

关键词：冷喷涂 , 304不锈钢 , 变形温度 , 高温变形

INFLUENCE OF DEFORMATION TEMPERATURE ON HOT DEFORMATION BEHAVIOR OF COLD SPRAYED 304 STAINLESS STEEL COATING MATERIAL

Keywords： cold spraying , 304 stainless steel , deformation temperature , hot deformation

采用冷喷涂技术制备了致密的304不锈钢涂层材料.利用热模拟试验机对冷喷涂304不锈钢涂层材料在1000-1150℃压缩变形,研究变形温度对其变形抗力、组织和硬度的影响.结果表明,随着变形温度由1000℃上升到1 150℃,冷喷涂304不锈钢涂层材料稳态变形抗力由315.4 MPa降低到187.9 MPa,硬度由332.8 HV0.2降低到244.8 HV0.2,易变形区面积增大,自由变形区发生再结晶,裂纹减少.在上述变形条件下,热变形激活能Q为464 kJ/mol.冷喷涂304不锈钢涂层在1237-1265℃发生相变.

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