| 冲击能量对 Fe-C-Mo-V 堆焊合金抗磨粒磨损性能的影响 |
| |
| 引用本文： | 黄智泉,段嘉旭,杨威,张海燕.冲击能量对 Fe-C-Mo-V 堆焊合金抗磨粒磨损性能的影响[J].焊接学报,2020,41(12):80-85. |
| |
| 作者姓名： | 黄智泉 段嘉旭 杨威 张海燕 |
| |
| 作者单位： | 郑州机械研究所有限公司，郑州，450001 |
| |
| 基金项目： | 郑州市重大科技创新专项资助项目 |
| |
| 摘 要： | 采用含Fe-C-Mo-V的气体保护药芯焊丝堆焊制备磨损试样，并对其进行不同冲击能量下的动载冲击磨粒磨损试验. 通过扫描电子显微镜配合能谱分析、磨损失重测试和激光扫描共聚焦显微镜观察等测试方法，对熔敷金属的显微组织及磨痕特征进行分析及表征，研究了熔敷金属在不同冲击能量下的磨粒磨损行为. 结果表明，熔敷金属的显微组织主要由奥氏体基体、层片状共晶组织及团块状的VC硬质相构成. 熔敷金属的磨损失重、磨痕粗糙度以及磨痕深度均随冲击能量的增加而逐渐减小. 磨损机制为磨粒对奥氏体基体的微观切削以及塑性变形. 随着冲击能量的增加，熔敷金属产生加工硬化，磨痕亚表面出现形变马氏体组织，且VC硬质相与层片状共晶组织相互作用，共同提高堆焊层的硬度，从而提高基体的耐磨性，增强抗冲击性能.
|
| 关 键 词： | Fe-C-Mo-V堆焊合金 冲击能量 磨粒磨损 形变马氏体 |
| 收稿时间： | 2020-02-28 |
Study of impact energy on abrasive wear resistance of Fe-C-Mo-V hardfacing alloys |
| |
| Affiliation: | Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou, 450001,China |
| |
| Abstract: | Wear samples were prepared by hardfacing welding with Fe-C-Mo-V gas shielded flux-cored wire, and subjected to dynamic impact abrasive wear tests under different impact energy. Microstructures and wear scar characteristics of deposited metal were characterized by scanning electron microscopy with energy disperse spectroscopy, weight loss test, and laser scanning confocal microscopy to investigate the abrasive wear behavior of deposited metal under different impact energy. The results show that the microstructure of deposited metal is mainly composed of austenite, lamellar eutectic structure, and spherical VC hard phases. The wear loss of deposited metal, the roughness of the wear scar, and the depth of the wear scar gradually decrease with the increase of impact energy. The wear mechanism are the micro-cutting of the austenite matrix by the abrasive grains and plastic deformation. As the impact energy increases, the deposited metal undergoes work hardening, and a deformed martensite structure appears on the subsurface of the wear scar. Furthermore, the VC hard phase interacts with the lamellar eutectic structure to increase the hardness of the deposited metal, thereby improving the wear resistance of the matrix and enhancing the impact resistance. |
| |
| Keywords: | |
| 本文献已被 万方数据 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 |
|
