焊接工艺对690镍基合金焊丝熔敷金属高温失塑裂纹敏感性影响研究
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摘要
针对690镍基合金熔敷金属高温失塑裂纹敏感性问题,采用基于Gleeble-3500热力耦合试验机的STF试验,开展焊接工艺对国产化690镍基合金焊丝WHS690M熔敷金属高温失塑裂纹敏感性的影响研究,并与进口Inconel 52M焊丝试验结果进行对比分析。试验表明,熔敷金属高温失塑裂纹最小临界应变出现在1 050℃附近,焊接热输入对最小临界应变影响较小,相比于大面积堆焊熔敷层,对接焊缝熔敷金属临界应变降低,高温失塑裂纹敏感性提高。
For the problems of the ductility dip cracking(DDC) susceptibility of deposited metal of 690 nickel base alloy at high temperature,a strain-to-fracture(STF) test based on Gleeble-3500 thermo-mechanical simulator is performed to evaluate the DDC susceptibility of WHS690M and Inconel 52 M. The results show that the minimum critical strain of the DDC of deposited metal appears at the temperature about 1 050 ℃,and welding heat input has little effect on the minimum critical strain. Comparing with the deposited layer of large-area surfacing,the critical strain of butt weld deposited metal reduces,and DDC susceptibility increases.
For the problems of the ductility dip cracking(DDC) susceptibility of deposited metal of 690 nickel base alloy at high temperature,a strain-to-fracture(STF) test based on Gleeble-3500 thermo-mechanical simulator is performed to evaluate the DDC susceptibility of WHS690M and Inconel 52 M. The results show that the minimum critical strain of the DDC of deposited metal appears at the temperature about 1 050 ℃,and welding heat input has little effect on the minimum critical strain. Comparing with the deposited layer of large-area surfacing,the critical strain of butt weld deposited metal reduces,and DDC susceptibility increases.
引文
[1]上海发电设备成套设计研究院.压水堆核电站核岛主设备材料和焊接[M].上海:上海科学技术文献出版社,2009:275-280.
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[3]崔巍,陈静青,陆皓,等.晶界滑移对镍基合金失延开裂的影响[J].中国有色金属学报,2013(23):1269-1274.
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[5]Nissley N.E.,Lippold J.C.Development of the strain-tofracture test[J].Weld Journal,2003(82):355-364.
[6]Ramirez A.J.,Lippold J.C.High temperature behavior of Ni-base weld metal Part I.Ductility and microstructure characterization[J].Materials Science and Engineering:A,2004(380):259-271.
[7]Ramirez A.J.,Lippold J.C.High temperature behavior of Ni-base weld metal Part II-Insight into the mechanism for ductility dip cracking[J].Materials Science and Engineering:A,2004(380):245-258.
[8]谷雨,张俊宝,左波,等.核电设备用690镍基合金气体保护焊焊丝国产化研究[J].焊接,2017(2):17-20.
[9]Noecker F.F.,Dupont J.N.Metallurgical Investigation into Ductility Dip Cracking in Ni-Based Alloys:Part I[J].Weld Journal,2009,88(1):7-20.
[10]马姝丽,罗英,陈静青,等.镍基高温合金的裂纹敏感性及微观组织分析[J].热加工工艺,2013(42):13-15.
[11]陈静青.FM-52M熔敷金属高温失塑裂纹机理研究[D].上海:上海交通大学,2014:48-56.
[2]吴伟,朱明军,李太彬.Nb对690镍合金焊条堆焊金属DDC敏感性影响[J].焊接,2007(2):55-58.
[3]崔巍,陈静青,陆皓,等.晶界滑移对镍基合金失延开裂的影响[J].中国有色金属学报,2013(23):1269-1274.
[4]王海涛.核电安全端异种金属焊接接头的局部力学性能及断裂行为[D].上海:华东理工大学,2013.
[5]Nissley N.E.,Lippold J.C.Development of the strain-tofracture test[J].Weld Journal,2003(82):355-364.
[6]Ramirez A.J.,Lippold J.C.High temperature behavior of Ni-base weld metal Part I.Ductility and microstructure characterization[J].Materials Science and Engineering:A,2004(380):259-271.
[7]Ramirez A.J.,Lippold J.C.High temperature behavior of Ni-base weld metal Part II-Insight into the mechanism for ductility dip cracking[J].Materials Science and Engineering:A,2004(380):245-258.
[8]谷雨,张俊宝,左波,等.核电设备用690镍基合金气体保护焊焊丝国产化研究[J].焊接,2017(2):17-20.
[9]Noecker F.F.,Dupont J.N.Metallurgical Investigation into Ductility Dip Cracking in Ni-Based Alloys:Part I[J].Weld Journal,2009,88(1):7-20.
[10]马姝丽,罗英,陈静青,等.镍基高温合金的裂纹敏感性及微观组织分析[J].热加工工艺,2013(42):13-15.
[11]陈静青.FM-52M熔敷金属高温失塑裂纹机理研究[D].上海:上海交通大学,2014:48-56.