| 含Nb元素堆焊层金属中碳化物的析出行为 |
| |
| 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. |
| |
| 作者姓名： | 付莉超 赵鑫 杨庆祥 |
| |
| 作者单位： | 华北理工大学 轻工学院, 唐山 063000,华北理工大学 轻工学院, 唐山 063000,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) |
| |
| 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.
|
| 关 键 词： | 合金元素铌 连铸辊 堆焊 热力学 碳化物 |
| 收稿时间： | 2013/12/9 0:00:00 |
Precipitation behavior of carbide in hardfacing coating containing Nb |
| |
| FU Lichao,ZHAO Xin and YANG Qingxiang.Precipitation behavior of carbide in hardfacing coating containing Nb[J].Transactions of The China Welding Institution,2015,36(6):39-43. |
| |
| Authors: | FU Lichao ZHAO Xin and YANG Qingxiang |
| |
| Affiliation: | Qinggong College, North China University of Science and Technology, Tangshan 063000, China,Qinggong College, North China University of Science and Technology, Tangshan 063000, China and State Key Laboratory of Metastable Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China |
| |
| 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. |
| |
| Keywords: | alloying element niobium(Nb) continuous casting roller hardfacing thermodynamics carbide |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《焊接学报》浏览原始摘要信息 |
|
点击此处可从《焊接学报》下载全文 |
|
