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

朱传琳; 张俊宝; 程从前; 赵杰

doi:10.3724/SP.J.1037.2013.00241

金属学报 >

2013 , Vol. 49 >Issue 10: 1275 - 1280

DOI: https://doi.org/10.3724/SP.J.1037.2013.00241

论文

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

朱传琳 ,
张俊宝 ,
程从前 ,
赵杰

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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

朱传琳, 女, 1988年生, 硕士生

收稿日期: 2013-05-02

修回日期: 2013-07-03

网络出版日期: 2013-10-11

基金资助

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

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

ZHU Chuanlin ,
ZHANG Junbao ,
CHENG Congqian ,
ZHAO Jie

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1) School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085
2) Baosteel Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 201900

Received date: 2013-05-02

Revised date: 2013-07-03

Online published: 2013-10-11

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摘要

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1150℃,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 HV_0.2降低到244.8 HV_0.2,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.

关键词： 冷喷涂; 304不锈钢; 变形温度; 高温变形

本文引用格式

朱传琳 , 张俊宝 , 程从前 , 赵杰 . 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[J]. 金属学报, 2013 , 49(10) : 1275 -1280 . DOI: 10.3724/SP.J.1037.2013.00241

Abstract

The dense 304 stainless steel coating material was fabricated by cold spraying technology.The influence of deformation temperature on hot deformation behavior of cold sprayed 304 stainless steel coating material was investigated by thermo－mechanical simulator.The results showed that deformation resistance of cold sprayed 304 stainless steel coating material reduced with the increment of deformation temperature. The steady－state deformation resistance reduced from 315.4 MPa to 187.9 MPa when deformation temperature increased from 1000℃ to 1150℃ with deformation rate 20 s^-1 and deformation reduction 17.5%. The microsturcture of deformation sample might be divided into easy, difficult and free deformation zones. The area of easy deformation zone increased and area of difficult deformation zone decreased when deformation temperature increased from 1000℃ to 1150℃. Recrystallization occurred at free deformation zone without cracking at 1150℃. DSC curve showed that phase transition of cold sprayed 304 stainless steel coating material occurred at 1237－1265℃. The microhardness of cold sprayed 304 stainless steel coating material was 313.3 HV_0.2, which was relatively high. The microhardness of deformation samples reduced from 332.8 HV_0.2 to 244.8 HV_0.2 as the deformation temperature increased from 1000℃ to 1150℃ with deformation rate 20 s^-1 and deformation reduction 50%. The hot temperature deformation equation of cold sprayed 304 stainless steel coating material was obtained with deformation temperature 1000－1150℃ and deformation rate 5－20 s^-1. The value of hot temperature deformation activation energy was 464 kJ/mol under the deformation conditions.

Key words： cold spraying; 304 stainless steel; deformation temperature; hot deformation

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