选用CuSi3焊丝对镍基合金/不锈钢进行钨极惰性气体(TlG)钎焊实验,运用OM、SEM和EDS分析接头微观组织,通过拉伸实验和硬度实验评定接头的力学性能.结果表明:TIG钎焊接头具有熔焊和钎焊的双重性质,不锈钢母材局部熔化,生成Fe基熔合区;在接头搭接区及镍基合金母材与焊缝金属之间存在界面反应层,反应层可分为熔化未混合区、Ni基树枝晶和晶间Cu基区:焊缝区为Cu基体上分布着颗粒状Fe基固溶体:CuSi3接头剪切强度达到195 MPa,接头断裂于焊缝与不锈钢界面处,断口为微孔聚合机制引起的塑性断裂;在界面处硬度值发生突变,Ni基树枝晶硬度值达到HV433.3,不锈钢熔合区中的Fe基体硬度值达到HV453.4,近界面处焊缝区Cu基体硬度值为HV150.
参考文献
[1] | 李亚江.特殊及难焊材料的焊接[M].北京:化学工业出版社,2003 |
[2] | 赵越.钎焊技术及应用[M].北京:化学工业出版社,2004 |
[3] | 姜晓飞,何鹏,冯吉才,石常亮.CMT法30CrMnSi钢板表面熔敷CuSi3接头组织结构特征[J].焊接学报,2007(02):47-50. |
[4] | Taichi MURAKAMI;Kazuhiro NAKATA;Hongjun TONG;Masao USHIO .Dissimilar Metal Joining of Aluminum to Steel by MIG Arc Brazing Using Flux Cored Wire[J].ISIJ International,2003(10):1596-1602. |
[5] | 于治水,周方明,祁凯,吴铭方.Cu基钎料MIG钎焊接头断裂行为分析[J].焊接学报,2001(06):29-32. |
[6] | W GAWRYSIUK .Technology of the arc-braze welding process. Recommendations and examples of industrial applications[J].Welding International,2006(1):10-16. |
[7] | CHOVET C;GUIHEUX S .Possibilities offered MIG and TIG brazing of galvanized ultra high strength steels for automotive applications[J].Metallurgia Italiana,2006,98(7-8):47-54. |
[8] | B. Bouaifi;B. Ouaissa;A. Helmich .Plasma arc brazing in sheet metal construction[J].Science and Technology of Welding and Joining,2002(5):326-330. |
[9] | KAZUYOSHI S;KAZUTOSHI N .Recent trends and future development of interfacial joining processes[J].Journal of the Japan Welding Society,2003,72(01):31-39. |
[10] | NAKAHASHI M;SUENAGA S;SHIROKANE M;TAKEDAH .Transient liquid phase bonding for Ni-base superalloys,Mar-M247 and IN939[J].Materials Transactions JIM,1992,33(01):60-65. |
[11] | FRINGS A;STOCKEL S .Fully mechanized inert-gas metal-arc brazing of aluminized thin steel sheet[J].Schweissen and Schneiden,1989,41(11):577-583. |
[12] | HACKL H .MIG brazing of galvanized light-gauge sheets[J].Welding Review International,1996,15(06):122-123. |
[13] | PREGELJ A;BRECEIL F .TIG-plasma brazed vacuum joints[J].Vacuum,1990,40(01):65-66. |
[14] | Bernd Kempf;Eva Sjostrom;Dieter Kaufmann;Jurgen Breme;Wolfgang Weise .New brazing solders for the joining of chrome-nickel steels[J].Schweissen & Schneiden,2001(1):E6-E11. |
[15] | 黄德彬.有色金属材料手册[M].北京:化学工业出版社,2005:18-35. |
[16] | 倪加明,李俐群,陈彦宾,封小松.铝/钛异种合金激光熔钎焊接头特性[J].中国有色金属学报,2007(04):617-622. |
[17] | 潘志勇,汪明朴,李周,邓楚平,肖柱,陈畅.超高强度Cu-5.2Ni-1.2Si合金的形变热处理[J].中国有色金属学报,2007(11):1821-1826. |
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