Inconel 690带极电渣堆焊熔敷金属力学性能
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摘要
针对核电用Inconel 690镍基合金的研究现状,对熔敷金属的力学性能展开研究。采用金相显微镜观察Inconel 690镍基合金带极电渣堆焊熔敷金属组织、采用扫描电镜对熔敷金属拉伸断口进行研究。结果表明,熔敷金属中有大量析出相,主要沿枝晶间分布;随着熔敷金属中Mn,Nb含量的增加,析出相的数量和尺寸增加,拉伸断口中高温低塑性裂纹减少,熔敷金属中晶界滑移受到析出相的钉扎,台阶和韧窝交错分布;熔敷金属Mn,Nb元素能够增加材料塑性储备,显著提升对高温低塑性裂纹(DDC)的抵抗作用。
For the research status of nuclear power Inconel 690 nickel-base alloy,the mechanical properties of deposited metal were studied.Inconel 690 filler metal has been researched on deposited metal and tensile fracture and cracks by metalloscope and scanning electron microscope.The results show that there were a large number of precipitates in the deposited metal,which mainly distributed along interdendritic distribution.With the increased of the content of Mn and Nb in the deposited metal,the number and size of the precipitates increased.The DDC morphology decreased,grain boundary slip was tacked by the precipitated phase.Mn and Nb elements in deposited metal can increase the plastic reserve of materials,which enhanced the resistance to DDC significantly.
For the research status of nuclear power Inconel 690 nickel-base alloy,the mechanical properties of deposited metal were studied.Inconel 690 filler metal has been researched on deposited metal and tensile fracture and cracks by metalloscope and scanning electron microscope.The results show that there were a large number of precipitates in the deposited metal,which mainly distributed along interdendritic distribution.With the increased of the content of Mn and Nb in the deposited metal,the number and size of the precipitates increased.The DDC morphology decreased,grain boundary slip was tacked by the precipitated phase.Mn and Nb elements in deposited metal can increase the plastic reserve of materials,which enhanced the resistance to DDC significantly.
引文
[1]霍树斌,陈佩寅,陈燕.690合金焊接材料的发展现状及国产化研究进展[C].北京:中国核学会2009年学术年会,2009:265-271.
[2]薄春雨.690镍基合金焊带熔敷金属结晶裂纹敏感性研究[D].北京:机械科学研究总院硕士学位论文,2006.
[3]唐正柱,陈佩寅,吴伟.Nb和Ti对高温失塑裂纹敏感性影响机理研究[J].焊接,2007(11):37-41,67.
[4]吴伟,朱明军,李太彬.Nb对690镍合金焊条熔敷金属DDC敏感性影响[J].焊接,2007(2):55-58.
[5]Lippold J C,Nissley N E.Further investigations of ductility-dip cracking in high chromium,Ni-base filler metals[J].Welding in the World,2007,51(9-10):24-30.
[6]吴伟,陈佩寅,姜胡.用高温拉伸试验评价HT690镍基合金焊条熔敷金属DDC敏感性[J].焊接,2009(2):61-64.
[7]莫文林,张旭,李殿中,等.Nb含量对NiCrFe-7焊缝金属组织、缺陷和力学性能的影响[J].金属学报,2015,51(2):230-238.
[8]Sedriks A J,Floreen S,Mcilree A R.The effect of nickel content on the stress corrosion resistance of Fe-Cr-Ni alloys in an elevated temperature caustic environment[J].Corrosion,1976,32(4):157-160.
[9]Mcilree A R,Michels H T.Stress corrosion behavior of Fe-Cr-Ni and other alloys in high temperature caustic solutions[J].Corrosion,1977,33(2):60-67.
[10]Kiser S D,Zhang R,Baker B A.A new welding material for improved resistance to ductility dip cracking[C].Trends in Welding Research,USA,2009:639-644.
[11]Ramirez A J,Sowards J W,Lippold J C.Improving the ductility-dip cracking resistance of Ni-base alloys[J].Journal of Materials Processing Tech,2006,179(1):212-218.
[12]Nissley N E.Development of the strain-to-fracture test to study ductility-dip cracking in austenitic alloys[D].The Ohio State University,USA,2002.
[2]薄春雨.690镍基合金焊带熔敷金属结晶裂纹敏感性研究[D].北京:机械科学研究总院硕士学位论文,2006.
[3]唐正柱,陈佩寅,吴伟.Nb和Ti对高温失塑裂纹敏感性影响机理研究[J].焊接,2007(11):37-41,67.
[4]吴伟,朱明军,李太彬.Nb对690镍合金焊条熔敷金属DDC敏感性影响[J].焊接,2007(2):55-58.
[5]Lippold J C,Nissley N E.Further investigations of ductility-dip cracking in high chromium,Ni-base filler metals[J].Welding in the World,2007,51(9-10):24-30.
[6]吴伟,陈佩寅,姜胡.用高温拉伸试验评价HT690镍基合金焊条熔敷金属DDC敏感性[J].焊接,2009(2):61-64.
[7]莫文林,张旭,李殿中,等.Nb含量对NiCrFe-7焊缝金属组织、缺陷和力学性能的影响[J].金属学报,2015,51(2):230-238.
[8]Sedriks A J,Floreen S,Mcilree A R.The effect of nickel content on the stress corrosion resistance of Fe-Cr-Ni alloys in an elevated temperature caustic environment[J].Corrosion,1976,32(4):157-160.
[9]Mcilree A R,Michels H T.Stress corrosion behavior of Fe-Cr-Ni and other alloys in high temperature caustic solutions[J].Corrosion,1977,33(2):60-67.
[10]Kiser S D,Zhang R,Baker B A.A new welding material for improved resistance to ductility dip cracking[C].Trends in Welding Research,USA,2009:639-644.
[11]Ramirez A J,Sowards J W,Lippold J C.Improving the ductility-dip cracking resistance of Ni-base alloys[J].Journal of Materials Processing Tech,2006,179(1):212-218.
[12]Nissley N E.Development of the strain-to-fracture test to study ductility-dip cracking in austenitic alloys[D].The Ohio State University,USA,2002.