利用6kW横流CO2激光器在1Cr18Ni9Ti不锈钢表面进行了不同工艺参数下单道Ni25WC35合金粉末熔覆.分析了熔覆层的物相组成,研究了不同工艺参数对熔覆层耐腐蚀性能的影响.结果表明:熔覆层主要由(Fe,Ni)固溶体和WC原位自生成的W2C组成,同时含有CrNiFeC,Cu3.8Ni化合物和FeW3C,Ni2Si,Fe3Ni3B等硬质相.光学显微观察显示熔覆层组织均匀、致密,与基体结合良好.在5.0％NaCl饱和溶液中电化学腐蚀测量分析结果得出,随着激光功率的增加,熔覆层的耐腐蚀性能降低；随着扫描速率增加,耐腐蚀性能先增加,后降低.最高自腐蚀电位为-554.70mY,最低腐蚀电流密度为0.55μA·cm-2.综合得出,P=3.0kW,ν=500mm·min-1的试样熔覆层耐腐蚀性能最好.
参考文献
| [1] | Fengjun Cheng;Yisan Wang;Tinggui Yang .Microstructure and wear properties of Fe-VC-Cr_7C_3 composite coating on surface of cast steel[J].Materials Characterization,2008(4):488-492. |
| [2] | Smurov I .Laser cladding and laser assisted direct manufacturing[J].Surface & Coatings Technology,2008(18):4496-4502. |
| [3] | WIDEN J;JAHN S;REICH S et al.Cladding of aluminum substrates with iron based wear resistant materials[J].Surface and Coatings Technology,2008,202(18):4509-4514. |
| [4] | Viswanathan, A;Sastikumar, D;Kumar, H;Nath, AK .Formation of WC-iron silicide (Fe5Si3) composite clad layer on AISI 316L stainless steel by high power (CO2) laser[J].Surface & Coatings Technology,2009(12):1618-1623. |
| [5] | Tobar MJ;Alvarez C;Amado JM;Rodiguez G;Yanez A .Morphology and characterization of laser clad composite NiCrBSi-WC coatings on stainless steel[J].Surface & Coatings Technology,2006(22/23):6313-6317. |
| [6] | J.M. Amado;M.J. Tobar;J.C. Alvarez;J. Lamas;A. Yanez .Laser Cladding Of Tungsten Carbides (spherotene~r) Hardfacing Alloys For The Mining And Mineral Industry[J].Applied Surface Science,2009(10):5553-5556. |
| [7] | CHEN C Z;WANG D G;BAO Q H et al.Effects of technological parameters on the microstructure of laser remelted hydroxyapatite coatings[J].Applied Physics A:Materials Science and Processing,2006,39(06):1169-1173. |
| [8] | Xie GZ;Lu YJ;He ZY;Hu B;Wang KY;Mo XY;Wu YP;Lin PH .Microstructure and corrosion properties of plasma-sprayed NiCr-Cr3C2 coatings comparison with different post treatment[J].Surface & Coatings Technology,2008(13):2885-2890. |
| [9] | 蒋振平,田乃良.激光熔覆含碳化钨的镍基合金[J].激光与红外,2004(03):189-191. |
| [10] | ZHOU Sheng-feng;ZENG Xiao-yan;HU Qian-wu et al.Analysis of crack behavior for Ni-based WC coatings by laser cladding and crack-free realization[J].Applied Surface Science,2008,255(05):1646-1653. |
| [11] | 查莹,周昌炽,唐西南,张展.改善激光熔覆镍基合金和陶瓷硬质相复合涂层性能的研究[J].中国激光,1999(10):947-950. |
| [12] | 田乃良,杜荣建,周昌炽.激光熔覆添加碳化钨的镍基合金应力状况研究[J].中国激光,2004(04):505-508. |
| [13] | 李强,张永忠,李劲风,林庆彬,张钦钊,刘紫兰.激光熔覆316L不锈钢涂层的结构与腐蚀性能[J].激光技术,2004(03):237-240,270. |
| [14] | 樊丁,李强,张建斌.激光熔覆FeNiCrAl合金涂层的组织与腐蚀性能[J].兰州理工大学学报,2009(02):13-16. |
| [15] | 张春华,张松,文効忠,刘常升,才庆魁.6061Al合金表面激光熔覆Ni基合金的组织及性能[J].稀有金属材料与工程,2005(05):701-704. |
| [16] | Zhou, SF;Huang, YJ;Zeng, XY .A study of Ni-based WC composite coatings by laser induction hybrid rapid cladding with elliptical spot[J].Applied Surface Science,2008(10):3110-3119. |
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%