含Nb元素堆焊层金属中碳化物的析出行为
发布时间：2019-07-16 09:41
【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,Nb C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]:Taking surfacing continuous casting roller as the research object, three kinds of flux-cored welding wires with different alloy element Nb content were developed. The microstructure and carbide morphology of the wires were observed by metallographic microscope and scanning electron microscope. The phase structure was measured by X-ray diffractometer. The precipitation behavior of carbides in niobium surfacing layer metals was analyzed by Thermo-Calc software. The results show that the microstructure of the surfacing layer is Ferrite, M23C6 and MC.. With the increase of Nb element content, the microstructure of, Nb C precipitates along grain boundary. The results of thermodynamic calculation show that the main precipitated carbides are MC,M23C6.. With the increase of Nb content, the precipitation of MC increased, but the precipitation of M23C6 decreased. The main elements in MC were Nb elements, and a certain amount of Mo,V,Cr and Fe elements were dissolved, and the main elements in M23C6 were Fe,Cr elements, that is, the change of Nb element content mainly affected MC carbides.
【作者单位】： 华北理工大学轻工学院;燕山大学亚稳材料制备技术与科学国家重点实验室;
【基金】：国家自然科学基金资助项目(51271163)
【分类号】：TG455
[Abstract]:Taking surfacing continuous casting roller as the research object, three kinds of flux-cored welding wires with different alloy element Nb content were developed. The microstructure and carbide morphology of the wires were observed by metallographic microscope and scanning electron microscope. The phase structure was measured by X-ray diffractometer. The precipitation behavior of carbides in niobium surfacing layer metals was analyzed by Thermo-Calc software. The results show that the microstructure of the surfacing layer is Ferrite, M23C6 and MC.. With the increase of Nb element content, the microstructure of, Nb C precipitates along grain boundary. The results of thermodynamic calculation show that the main precipitated carbides are MC,M23C6.. With the increase of Nb content, the precipitation of MC increased, but the precipitation of M23C6 decreased. The main elements in MC were Nb elements, and a certain amount of Mo,V,Cr and Fe elements were dissolved, and the main elements in M23C6 were Fe,Cr elements, that is, the change of Nb element content mainly affected MC carbides.
【作者单位】： 华北理工大学轻工学院;燕山大学亚稳材料制备技术与科学国家重点实验室;
【基金】：国家自然科学基金资助项目(51271163)
【分类号】：TG455
【参考文献】
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3 蒋e，
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