不同焊补工艺对E260-450-MS铸钢件焊接组织及性能的影响

孙佳, 梁炬星, 罗涛, 马传平

孙佳, 梁炬星, 罗涛, 马传平. 不同焊补工艺对E260-450-MS铸钢件焊接组织及性能的影响[J]. 材料开发与应用, 2024, 39(3): 42-50.
引用本文: 孙佳, 梁炬星, 罗涛, 马传平. 不同焊补工艺对E260-450-MS铸钢件焊接组织及性能的影响[J]. 材料开发与应用, 2024, 39(3): 42-50.
SUN Jia, LIANG Juxing, LUO Tao, MA Chuanping. Effect of Different Welding Repair Processes on Microstructure and Properties of E260-450-MS Cast Steel[J]. Development and Application of Materials, 2024, 39(3): 42-50.
Citation: SUN Jia, LIANG Juxing, LUO Tao, MA Chuanping. Effect of Different Welding Repair Processes on Microstructure and Properties of E260-450-MS Cast Steel[J]. Development and Application of Materials, 2024, 39(3): 42-50.

不同焊补工艺对E260-450-MS铸钢件焊接组织及性能的影响

基金项目: 

中央高校基本科研业务费GF培育项目(2682023GF019)

详细信息
    作者简介:

    孙佳,女,1985年生,硕士,高级工程师,主要从事转向架构架设计工作。E-mail:15005194392@163.com

    通讯作者:

    马传平,男,1987年生,硕士,讲师,主要从事焊接残余应力、疲劳与断裂研究工作。E-mail:414677984@qq.com

  • 中图分类号: TG407

Effect of Different Welding Repair Processes on Microstructure and Properties of E260-450-MS Cast Steel

  • 摘要: 铸钢件的焊补效果关系到转向架构件的服役寿命,为确定合适的焊补工艺,本研究采用3种不同焊补工艺对E260-450-MS铸钢件焊接接头的金相组织、拉伸性能、硬度、冲击性能进行了对比研究。结果表明:3种不同焊补工艺的接头焊缝、热影响区和母材的金相组织无明显的差异;接头抗拉强度均高于450 MPa,断后伸长率均超过20%,断裂部位均位于母材;接头硬度分布规律一致,从母材到焊缝中心,维氏硬度值先升高后降低,硬度峰值均小于250HV3。焊接接头各区冲击吸收能量值大小关系为:焊缝>热影响区>母材,焊缝冲击断口为韧窝断口,热影响区和母材为解理断口。焊前不预热,焊后保温覆盖缓冷,且不进行热处理的焊补工艺为最优焊补工艺。
    Abstract: The welding repair effect of cast steels is related to the service life of bogie components. In order to determine the appropriate welding repair process, the metallographic structures, tensile properties, hardness and impact properties of the repair welded joints of E260-450-MS cast steel obtained by using three different weld repairing processes are compared. The results show that there is no obvious difference in the microstructures of the weld seam, heat affected zone and base metal among the joints by the three processes. The tensile strengths of the joints are all higher than 450 MPa, the elongations after fracture are more than 20%, and the fractures are all located in the base metal. The distribution of the joint hardness is consistent. From the base metal to the center of the weld, the Vickers hardness value increases first and then decreases, and the peak hardness of the three kinds of joints are less than 250HV3. The impact absorption energy of the weld seam is the highest, that of the heat affected zone lower, and that of the base metal the lowest. The impact fracture of the weld seam is dimple fracture, and those of the heat affected zone and base metal are cleavage fracture. The optimal welding repair process is no preheating before welding, heat-insulating and slow cooling after welding with no heat treatment.
  • [1] 袁鹏,施丹.海洋工程船超厚高强铸钢件的焊接工艺[J].焊接技术, 2015, 44(7):84-87.
    [2] 李春来,秦庆斌,吴圣川,等. G20Mn5铸钢MAG焊接接头的组织与力学性能[J].机械工程材料, 2020, 44(7):8-11.
    [3] 卓帅,谢耀征,单其雨,等.铸件在轨道客车转向架上的应用及展望[J].机车车辆工艺, 2021(2):15-17.
    [4] 莫立新,杨超飞,牛继承. ZG14Ni3CrMoV钢铸件补焊方法研究[J].材料开发与应用, 2017, 32(1):54-57.
    [5] 方洪渊.焊接结构学[M].北京:机械工业出版社, 2008:130-132.
    [6] 中国机械工程学会焊接学会.焊接金相图谱[M].北京:机械工业出版社, 1987:34, 42-43, 58-61.
    [7] 李亚江.焊接冶金学:材料焊接性[M].北京:机械工业出版社, 2007:185-195.
    [8] 陶杰,姚正军,薛烽.材料科学基础[M]. 2版.北京:化学工业出版社, 2018.
    [9] 佘鹏,孙维光,马传平. A7N01S-T5铝合金激光-MIG复合焊接头低温韧性研究[J].电焊机, 2020, 50(4):111-115.
    [10] 钟群鹏,赵子华.断口学[M].北京:高等教育出版社, 2006:187-200.
    [11] 朱刚,周友龙,张志昌,等.B+级铸钢件缺陷低温焊补工艺试验研究[J].机车车辆工艺,2009,(1):4-6.
    [12] 张磊,赵勇桃,霍文霞.冷却速率对45Mn2钢魏氏组织的影响[J].热加工工艺, 2017, 46(12):228-231.
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出版历程
  • 收稿日期:  2023-08-24
  • 网络出版日期:  2024-07-22

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