电焊机2024，Vol.54Issue(2)：104-109,6.DOI:10.7512/j.issn.1001-2303.2024.02.16
Mn含量对ENiCrMo-2镍基焊条熔敷金属组织和性能的影响
Effect of Mn Content on the Microstructure and Properties of the Deposited Metal of ENiCrMo-2 Welding Electrode
孙墅畦 1陈波 2陈燕 2李睿 3于庭祥1
作者信息
- 1. 哈尔滨威尔焊接有限责任公司,黑龙江 哈尔滨 150060||中国机械总院集团哈尔滨焊接研究所有限公司,黑龙江 哈尔滨 150028
- 2. 哈尔滨威尔焊接有限责任公司,黑龙江 哈尔滨 150060
- 3. 中国机械总院集团哈尔滨焊接研究所有限公司,黑龙江 哈尔滨 150028
- 折叠
摘要
Abstract
ENiCrMo-2 nickel-based welding rod alloy cladding metal was prepared using SMAW.The microstructure of the cladding metal was studied by optical microscopy(OM),scanning electron microscopy(SEM),and energy dispersive spec-troscopy(EDS)methods.The grain boundary morphology,precipitate phase composition,and precipitate phase morphology characteristics were studied.The tensile test was conducted on the cladding metal,and the fracture morphology was ana-lyzed to study the effect of Mn content on the microstructure and mechanical properties of the cladding metal.The results showed that the microstructure was mainly columnar austenite,and the increase in Mn content changed the width of the seg-regation zone,but had no significant effect on the precipitate phase.The precipitate phase included Cr-rich carbides(M7C3)and Mo-and Cr-rich carbides(M23C6),with partial precipitates being M7C3 encapsulated by M23C6.With the increase in Mn content from 0.16 wt.%to 0.91 wt.%,the ductility and crack resistance of the cladding metal were improved,and the me-chanical properties of the cladding metal were good.Through fracture analysis,it was found that when the Mn content was 0.16 wt.%,there was a weak tendency for crystal cracks and high-temperature ductile cracks.The increase in Mn content weakened the crack tendency,and the dimple morphology on the fractured surface along with grain boundaries became gradually deeper and more uniform.Therefore,appropriately increasing Mn content can optimize the microstructure and me-chanical properties of ENiCrMo-2 nickel-based welding rod alloy cladding metal.When the Mn content is increased to 0.91 wt.%,the mechanical properties of the cladding metal are optimal.关键词
镍基焊条/熔敷金属/Mn含量/显微组织/析出相/力学性能/裂纹倾向Key words
welding electrode of nickel alloy/deposited metal/Mn content/microscopic organization/precipitated phase/mechanical properties/crack tendency分类
矿业与冶金引用本文复制引用
孙墅畦,陈波,陈燕,李睿,于庭祥..Mn含量对ENiCrMo-2镍基焊条熔敷金属组织和性能的影响[J].电焊机,2024,54(2):104-109,6.
