张柯柯,马宁,张占领,岳云,孙敬,吴志伟,杨蕴林

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属材料科学与加工技术重点实验室

摘要(Abstract)：

以热机械处理获得的超细晶1.6%C超高碳钢为研究对象,借助电致超塑性压缩试验研究了电场强度和初始应变速率对超高碳钢超塑性的影响,并探讨了其与40Cr钢电致超塑性焊接的可行性。实验结果表明,在压缩温度780℃、初始应变速率(0.5—5.0)×10-4s-1,试样接正极环状电极接负极条件下,超高碳钢的应力应变曲线呈现出明显的超塑性压缩流变特征,其应变速率敏感性指数为0.46;当电场强度为3kV/cm时,其超塑稳态流变应力降低10%以上。在焊接温度780℃、初始应变速率1.5×10-4s-1、预压应力56.6MPa、电场强度3kV/cm条件下,超高碳钢与40Cr钢实现了电致超塑性焊接,其接头拉伸强度达到533MPa,比不加电场时增加15%。

关键词(KeyWords)： 超高碳钢;电场;超塑性;固态焊接

Abstract:

Keywords:

基金项目(Foundation): National Natural Science Foundation of China(50774029);; The Foundation of Henan Province Outstanding Youth Scientist(074100510011),China

作者(Author): 张柯柯,马宁,张占领,岳云,孙敬,吴志伟,杨蕴林

DOI: 10.13289/j.issn.1009-6264.2010.09.007

参考文献(References)：

• [1]Furuhara T,Yamaguchi J,Maki T.Structure and mechanical property of ultra-fine grained high-carbon steels[J].CAMP-ISIJ,2004,17:356-358.
• [2]Sherby O D,Wadsworth B,Young C M,et al.Superplastic ultrahigh carbon steels[J].Scr Mater,1975,9(5):569-574.
• [3]Zhang Z L,Liu Y N,Zhu J W,et al.Processing and properties of ultrahigh-carbon(1.6%C)steel[J].Mater Sci Eng A,2008,483-484(1-2):64-66.
• [4]Liu S,Zhang K K,Ren W,et al.Study on compression superplasticity of1.31%C ultrahigh carbon steel[J].Hot Working Technology,2008,37(10):8-10,(in Chinese).
• [5]Wu S C.Superplastic Deformation Theory of Metals[M].Beijing:National Defense Industry Press,1997.(in Chinese).
• [6]Baranov Y V.Effect of electrostatic fields on mechanical characteristics and structure of metals and alloys[J].Mater Sci Eng A,2000,287(2):288-300.
• [7]Niu J T.Physical Simulation in Materials and Hot-Working[M].Beijing:National Defense Industry Press,1999.(in Chinese).
• [8]Conrad H.Electroplasticity in metals and ceramics[J].Mater Sci Eng A,2000,287(2):276-287.
• [9]Wen J B,Yang Y L,Yang Y S,et al.Applied Technology of Superplasticity[M].Beijing:Machinery Industry Press,2005.(in Chinese).
• [10]Ruano O A,Eiselstals L E,Sherby O D.Superplasticity in rapidly solidified white cast irons[J].Metall.Trans A,1982,13(10):1785-1792.

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