9%Ni钢配套焊条熔覆金属的组织和性能研究
发布时间：2018-11-16 15:48
【摘要】：针对9%Ni钢使用温度低,抗拉强度高和焊条工艺性不好等问题,研制了以CaO-CaF_2-TiO_2为主的渣系和Ni-Cr-Mo-Mn-W-Nb合金系的焊条。测试了熔敷金属的力学性能,借助光学显微镜、扫描电镜和光谱分析仪对接头组织和化学成分行了分析。结果表明,研制的焊条脱渣性能良好。熔敷金属抗拉强度为648 MPa,屈服强度为442 MPa,断后伸长率为36%,满足9%Ni钢使用要求。焊缝组织为奥氏体基体+析出物,奥氏体塑性好,析出相强化基体,-196℃下平均冲击吸收功为135 J,断口为典型的韧性断裂。
[Abstract]:In order to solve the problems of low temperature, high tensile strength and poor welding rod process of 9%Ni steel, the electrode of slag system and Ni-Cr-Mo-Mn-W-Nb alloy system based on CaO-CaF_2-TiO_2 was developed. The mechanical properties of the deposited metal were tested. The microstructure and chemical formation of the joints were analyzed by optical microscope, scanning electron microscope and spectrometer. The results show that the slag removal performance of the developed electrode is good. The tensile strength of the deposited metal is 648 MPa, and the yield strength is 442 MPa,. The elongation of the deposited metal is 36 and meets the requirements of 9%Ni steel. The microstructure of the weld is austenitic matrix precipitate, the austenite has good ductility, the precipitated phase strengthens the matrix, the average impact absorption energy at -196 鈩，
本文编号：2335926
[Abstract]:In order to solve the problems of low temperature, high tensile strength and poor welding rod process of 9%Ni steel, the electrode of slag system and Ni-Cr-Mo-Mn-W-Nb alloy system based on CaO-CaF_2-TiO_2 was developed. The mechanical properties of the deposited metal were tested. The microstructure and chemical formation of the joints were analyzed by optical microscope, scanning electron microscope and spectrometer. The results show that the slag removal performance of the developed electrode is good. The tensile strength of the deposited metal is 648 MPa, and the yield strength is 442 MPa,. The elongation of the deposited metal is 36 and meets the requirements of 9%Ni steel. The microstructure of the weld is austenitic matrix precipitate, the austenite has good ductility, the precipitated phase strengthens the matrix, the average impact absorption energy at -196 鈩，
本文编号：2335926
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