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氮气保护粉/丝复合堆焊高硼铁基合金的组织及结构

庄明辉, 李慕勤, 王军, 马春力, 蔡丁森

庄明辉, 李慕勤, 王军, 马春力, 蔡丁森. 氮气保护粉/丝复合堆焊高硼铁基合金的组织及结构[J]. 焊接学报, 2015, 36(9): 60-64.
引用本文: 庄明辉, 李慕勤, 王军, 马春力, 蔡丁森. 氮气保护粉/丝复合堆焊高硼铁基合金的组织及结构[J]. 焊接学报, 2015, 36(9): 60-64.
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ZHUANG Minghui, LI Muqin, WANG Jun, MA Chunli, CAI Dingsen. Microstructure of high carbon and high boron ferroalloy made with hybrid powder/wire overlaying under nitrogen protection[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(9): 60-64.
Citation: ZHUANG Minghui, LI Muqin, WANG Jun, MA Chunli, CAI Dingsen. Microstructure of high carbon and high boron ferroalloy made with hybrid powder/wire overlaying under nitrogen protection[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(9): 60-64.
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氮气保护粉/丝复合堆焊高硼铁基合金的组织及结构

  • 1.

    哈尔滨工业大学 先进焊接与连接国家重点实验室, 哈尔滨 150001;佳木斯大学 金属耐磨材料及表面技术工程研究中心, 佳木斯 154007

  • 2.

    佳木斯大学 金属耐磨材料及表面技术工程研究中心, 佳木斯 154007

基金项目: 黑龙江省自然科学基金重点项目(ZD201008);黑龙江省教育厅科学技术项目(11531365);佳木斯大学科学技术项目(L2013-063)

Microstructure of high carbon and high boron ferroalloy made with hybrid powder/wire overlaying under nitrogen protection

  • 1.

    State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;Engineering Center of Wear Resistant Metal Materials and Surface Technologies, Jiamusi University, Jiamusi 154007, China

  • 2.

    Engineering Center of Wear Resistant Metal Materials and Surface Technologies, Jiamusi University, Jiamusi 154007, China

摘要

    摘要
  • 摘要: 为改善高硼铁基堆焊合金韧性不足、易引发裂纹的问题,采用N2保护堆焊并添加氮化铬铁的方式引入合金元素N,同时添加强氮化物形成元素,制备高硼铁基堆焊合金,通过显微组织结构、微区成分、硬度等试验检验,分析合金元素N对高硼铁基堆焊合金组织与性能的影响. 结果表明,氮气保护堆焊高硼铁基合金由初晶Fe2B、共晶α-Fe+ Fe2B及粒状复合物M(C,N)组成,N元素的引入促使大量粒状复合物M(C,N)析出,有效细化初晶Fe2B相,抑制堆焊裂纹的出现. 堆焊合金的宏观硬度也因氮的引入而达到67.8 HRC,但过多的氮会导致Fe2B生长不完全,硬度略有下降.
    Abstract: In order to improve the low toughness and crack initiation of the overlayed high boron iron-based alloy (HBIA), HBIA was prepared by adding nitride ferrochrome and nitride-former under nitrogen protection. The effect of alloying element N on the microstructure and properties of prepared HBIA was investigated by the microstructure, micro zone composition and hardness tests. The results indicate that the microstructure of HBIA with N2 protection consisted of primary crystal Fe2B, α-Fe+Fe2B eutectic structure and granular M(C, N) compound. N addition brought lots of M(C, N) compound precipitations and resulted in structure refinement of the primary Fe2B, and cracking in the overlay was also restrained. The microhardness of HBIA rapidly increased to 67.8 HRC due to adding nitrogen. However, excessive N2 would result in incomplete growth of Fe2B phase and slight decrease of hardness.
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    • 参考文献(12)
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  • 收稿日期:  2014-10-28

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