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含Nb元素堆焊层金属中碳化物的析出行为

付莉超, 赵鑫, 杨庆祥

付莉超, 赵鑫, 杨庆祥. 含Nb元素堆焊层金属中碳化物的析出行为[J]. 焊接学报, 2015, 36(6): 39-43.
引用本文: 付莉超, 赵鑫, 杨庆祥. 含Nb元素堆焊层金属中碳化物的析出行为[J]. 焊接学报, 2015, 36(6): 39-43.
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FU Lichao, ZHAO Xin, YANG Qingxiang. Precipitation behavior of carbide in hardfacing coating containing Nb[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(6): 39-43.
Citation: FU Lichao, ZHAO Xin, YANG Qingxiang. Precipitation behavior of carbide in hardfacing coating containing Nb[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(6): 39-43.
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含Nb元素堆焊层金属中碳化物的析出行为

  • 1.

    华北理工大学 轻工学院, 唐山 063000

  • 2.

    燕山大学 亚稳材料制备技术与科学国家重点实验室, 秦皇岛 066004

基金项目: 国家自然科学基金资助项目(51271163)

Precipitation behavior of carbide in hardfacing coating containing Nb

  • 1.

    Qinggong College, North China University of Science and Technology, Tangshan 063000, China

  • 2.

    State Key Laboratory of Metastable Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China

摘要

    摘要
  • 摘要: 以堆焊连铸辊为研究对象,研制三种不同合金元素Nb加入量的药芯焊丝,采用金相显微镜和扫描电镜对其显微组织、碳化物形貌进行了观察. 采用X射线衍射仪对其相结构进行了测定. 采用Thermo-Calc软件对含铌堆焊层金属中碳化物的析出行为进行分析. 结果表明,堆焊层金属显微组织为铁素体、M23C6和MC. 随着Nb元素含量增加,其显微组织得到细化,NbC沿晶界析出. 热力学计算结果表明,析出碳化物主要为MC,M23C6. 随着Nb元素含量的增加,MC析出量增多,M23C6析出量减小. MC中主要是Nb元素,并溶解了一定量的Mo,V,Cr和Fe元素;M23C6中主要是Fe,Cr元素,即Nb元素含量变化主要影响MC型碳化物.
    Abstract: Three kinds of flux-cored wires were designed for hardfacing continuous casting roller. The microstructure and fractograph were observed by metallographic microscope, Scanning Electron Microscopy(SEM). The phase structures were determined by X-ray Diffraction (XRD). The thermodynamic precipitation of the hardfacing coating with Nb content was calculated by Thermo-Calc software. The results show that, the microstructures of the hardfacing metals are ferrite, M23C6 and MC. With the increase of the Nb content, the microstructure is refined and the NbC precipitates along the grain boundary. Thermodynamic calculations show that, the precipitated carbides are mainly MC and M23C6. With the increase of the Nb content, the amount of MC precipitated in the steel increases gradually while that of M23C6 decreases. MC mainly contains V and Nb element, and dissolves a certain Mo, Cr and Fe elements and M23C6 mainly contains Fe and Cr elements;Nb content mainly affects MC.
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    • 参考文献(8)
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    [8] 王智慧, 贺定勇. NbC增强Fe-Cr-C耐磨堆焊合金组织与磨粒磨损性能[J]. 焊接学报, 2007, 28(2): 55-58. Wang Zhihui, He Dingyong. Microstructures and properties of Fe-Cr-C hardfacing alloy strengthened by NbC[J]. Transactions of the China Welding Institution, 2007, 28(2): 55-58.
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    2. 胡泽群，裘荣鹏，宋宏鲁. 铌元素对Fe-Cr-C系药芯焊丝堆焊层耐磨性的影响. 电大理工. 2016(04): 3-5 . 百度学术

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  • 收稿日期:  2013-12-08

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