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高镍球铁同质电焊条的焊接工艺性能
Research of Homogeneous High Nickel Ductile Iron Welding Electrode
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- DOI:
- 作者:
- 徐锦锋 张文莉 翟秋亚 齐朋展
XU Jinfeng;ZHANG Wenli;ZHAI Qiuya;QI Pengzhan
- 作者单位:
- 西安理工大学材料科学与工程学院
School of Materials Science and Engineering,Xi′an University of Technology,Xi′an 710048,China
- 关键词:
- 高镍球铁电焊条 焊接工艺性能 焊缝组织
high-ni ductile welding electrode welding performance weld microstructure
- 摘要:
- 铸铁焊接效果在很大程度上取决于铸铁焊接材料,本文设计制造了新型高镍球铁同质电焊条。研究高镍球铁电焊条在冷焊条件下的焊接工艺性能和接头组织与性能。综合评价结果表明,高镍球铁同质电焊条焊接工艺性能良好,焊缝金属具有典型的铸铁结构,微观组织由奥氏体和球状石墨及晶间碳化物组成,熔合区宽度较窄,未产生莱氏体组织,接头抗拉强度为399 MPa,硬度在189~226 HB,加工性能优良,色泽与母材一致。新型焊材兼具镍基焊材和铸铁同质焊材双重优点,在铸铁焊接及焊补领域具有良好的工程应用前景。
The welding effect of cast iron depends largely on the welding material.In this paper,a new homogeneous high nickel ductile iron electrode is developed.The welding technology characteristics of the electrode and the microstructure and properties of welded joint under cold welding conditions were researched.The comprehensively evaluating experiments show that:the electrode has good technical performance.The weld metal has typical cast iron microstructure which composed of austenite,graphite spheroid and intergranular carbides.The width of fusion zone is narrow and No eutectic ledeburite microstructure forms.The tensile strength of the joint reaches 399 MPa and the Brinell hardness is between 189 HB and 226 HB.The welding zone has good machining performance as well as color consistent with the base metal.Thus,the new welding material has the double advantages of nickel-based welding material and homogenous cast iron welding material,it has the better application prospect on cast iron welding and repair.