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| K418合金和42CrMo钢激光焊焊缝的微观组织 | |
| 引用本文： | 刘秀波,虞钢,庞铭,宋天麟,范莉,周晓京.K418合金和42CrMo钢激光焊焊缝的微观组织[J].材料热处理学报,2009,30(6). |
| 作者姓名： | 刘秀波 虞钢 庞铭 宋天麟 范莉 周晓京 |
| 作者单位： | 1. 苏州大学机电工程学院,江苏,苏州,215021;中国科学院力学研究所,北京,100190 2. 中国科学院力学研究所,北京,100190 3. 苏州大学应用技术学院,江苏,苏州,215021 |
| 基金项目： | 江苏省自然科学基金，苏州大学引进人才科研启动基金 |
| 摘 要： | 采用透射电镜及附带能谱(TEM-EDS)对K418高温合金涡轮盘和42CrMo合金钢转轴激光焊焊缝的微观组织进行了分析.结果表明:焊缝主要由树枝状非平衡凝固的FeCrNiC(γ)固溶体组成,此外,还有少量细小、弥散的Ni_3Alγ'相、Laves颗粒和少量MC碳化物分布在树枝晶之间区域;根据热动力学原理对形成这一组织特征的原因进行了简要讨论. |
| 关 键 词： | 激光焊接 焊缝 微观组织 透射电镜 |
Microstructure of laser welded seam of cast Ni-base superalloy K418 and 42CrMo steel |
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| LIU Xiu-bo,YU Gang,PANG Ming,SONG Tian-lin,FAN Li,ZHOU Xiao-jing.Microstructure of laser welded seam of cast Ni-base superalloy K418 and 42CrMo steel[J].Transactions of Materials and Heat Treatment,2009,30(6). | |
| Authors: | LIU Xiu-bo YU Gang PANG Ming SONG Tian-lin FAN Li ZHOU Xiao-jing |
| Abstract: | Microstructure of laser welded seam of K418 superalloy turbo disk and alloy steel 42CrMo shaft was characterized by transmission electron microscopy (TEM) and energy dispersive spectrometer (EDS). Results show that the laser welded seam has non-equilibrium solidified microstructure consisting of FeCrNiC (γ) austenite solid solution dendrites as the dominant and some fine and dispersed Ni_3Alγ' phase and Laves particles as well as little amount of MC carbides distributed in the interdendritic regions. Mechanism of the formation of the microstructure is briefly discussed based on thermal-dynamics principles. |
| Keywords: | laser welding weld microstructure transmission electron microscopy (TEM) |
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