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| 电场作用下1.6%C-UHCS/40Cr钢的超塑性焊接 |
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张柯柯1, 孙敬1,2, 吴志伟1, 马宁1,3, 邱然锋1, 张占领1
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1.河南科技大学材料科学与工程学院, 洛阳 471003;2.中航锂电(洛阳)有限公司, 洛阳 471009;3.天津大学材料科学与工程学院, 天津 300072
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| 摘要: |
| 基于对40Cr钢淬火后与经热机械处理超高碳钢1.6% C-UHCS电场作用下超塑性焊接可行性的分析,在非真空、无保护气氛下,进行了电场作用下1.6% C-UHCS/40Cr的超塑性焊接工艺试验.结果表明,当施加试样接正极、环状电极接负极的电场时,可明显提高40Cr钢淬火后与经热机械处理超高碳钢1.6% C-UHCS的超塑性焊接效果.与不加电场相比,当两者在外加电场+3 kV/cm、预压应力56.6 MPa、焊接温度780℃、初始应变速率1.5×10-4/s的条件下,经20 min超塑性焊接,接头强度提高26.8%. |
| 关键词: 电场 超高碳钢 超塑性 固态焊接 |
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| 基金项目:国家自然科学基金资助项目(50774029);河南省杰出青年科学基金资助项目(074100510011) |
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| Superplastic welding of 1.6%C-UHCS/40Cr steel in an electric field |
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ZHANG Keke1, SUN Jing1,2, WU Zhiwei1, MA Ning1,3, QIU Ranfeng1, ZHANG Zhanling1
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1.School of Materials Science & Engineering, Henan University of Science and Technology, Luoyang 471003, China;2.China Aviation Lithium Battery Co., Ltd, Luoyang 471009, China;3.School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
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| Abstract: |
| The superplastic welding in an electric field between theromomechanical processed 1.6% C-UHCS and quenched 40Cr steel in atmosphere was conducted based on the analysis of their electro-superplastic weldablity. The results reveal that the performance of 1.6% C-UHCS/40Cr joint can apparently be improved when the sample connects positive,ring connects negative. Thereinto,the superplastic welding of both steels was carried out under the conditions of an electric field intensity of +3 kV/cm, a pre-pressed stress of 56.6 MPa,a welding temperature of 780℃,an initial strain rate of 1.5×10-4/s and welding time of 20 minutes,and the strength of joint increases by 26.8% compared with that obtained without electric field. |
| Key words: electric field ultra-high carbon steel superplasticity solid-state welding |
