为了解决铸铁零件激光熔覆易出现裂纹的问题,采用电刷镀与激光熔覆技术复合方法对铸铁零件进行再制造.采用扫描电镜(SEM)、能谱(EDS)、X射线衍射仪(XRD)、显微硬度计和往复摩擦磨损试验机分析了涂层的显微组织、测试了涂层的硬度和摩擦磨损性能.实验结果表明:电刷镀/激光熔覆复合处理所制备的涂层组织致密、无裂纹、气孔等缺陷.涂层主要由Fe和Ni3Si两相组成,涂层显微硬度达422～436 HV0.3,复合处理显著改善了铸铁在干摩擦条件下的耐磨性能.
参考文献
| [1] | Chengyun Cui;Zuoxing Guo;Hongying Wang;Jiandong Hu .In situ TiC particles reinforced grey cast iron composite fabricated by laser cladding of Ni-Ti-C system[J].Journal of Materials Processing Technology,2007(2/3):380-385. |
| [2] | 吕耀辉,徐滨士,向永华,刘存龙.灰口铸铁镍基等离子熔覆层组织和性能[J].中国表面工程,2009(01):46-48,55. |
| [3] | Tong X;Zhou H;Ren LQ;Zhang ZH;Cui RD;Zhang W .Thermal fatigue characteristics of gray cast iron with non-smooth surface treated by laser alloying of Cr powder[J].Surface & Coatings Technology,2008(12):2527-2534. |
| [4] | 李达,杨庆祥,崔占全,杨育林.高耐磨药芯焊丝堆焊组织及基体选择[J].焊接学报,2009(12):69-72. |
| [5] | PANAYOTOVA M .Deposition of Fe-C alloy on structural steel and cast iron for repair of worn machine parts[J].Surface and Coatings Technology,2000,124(2-3):266-267. |
| [6] | 郭绍义,李兴俊,杨秋合,杨金林,孟凡英.激光熔覆WC-Ni/TiC涂层的组织和摩擦磨损性能研究[J].材料工程,2008(06):72-75. |
| [7] | 栾景飞,严密.TiC-Fe3C对铸铁激光熔敷层耐磨性的影响[J].摩擦学学报,2002(05):339-342. |
| [8] | Navas C;Conde A;Fernandez BJ;Zubiri F;de Damborenea J .Laser coatings to improve wear resistance of mould steel[J].Surface & Coatings Technology,2005(1):136-142. |
| [9] | DONGS Y;XU B S;WANG Z J.Laser remanufacturing technology and its applications[A].北京,2007:6825. |
| [10] | Minlin Zhong;Wenjin Liu;Guoqing Ning .Laser direct manufacturing of tungsten nickel collimation component[J].Journal of Materials Processing Technology,2004(2):167-173. |
| [11] | L. Shepeleva;B. Medres;W. D. Kaplan;M. Bamberger;A. Weisheit .Laser cladding of turbine blades[J].Surface & Coatings Technology,2000(1/3):45-48. |
| [12] | 谢长生;王爱华;黄开会 等.铸铁表面激光熔覆裂纹的形成原因[J].钢铁,1994,29(08):48-53. |
| [13] | 栾景飞,罗伟,严密,周振丰,胡建东,朱卫忠.铸铁表面抗裂耐磨激光熔敷材料的研制[J].中国激光,2002(07):652-656. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%