全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
材料工程  2012 

工艺参数对不锈钢表面激光熔覆Ni基涂层组织及耐腐蚀性能的影响

, PP. 24-29

Keywords: 激光熔覆,镍基涂层,不锈钢,显微组织,耐腐蚀性能

Full-Text   Cite this paper   Add to My Lib

Abstract:

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-554.70mV,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。

References

[1]  CHENG Feng-jun, WANG Yi-san, YANG Ting-gui. Microstructure and wear properties of Fe-VC-Cr7C3 composite coating on surface of cast steel [J]. Materials Characterization, 2008, 59(4): 488-492.
[2]  SMUROV IGOR. Laser cladding and laser assisted direct manufacturing [J]. Surface & Coatings Technology, 2008, 202(18): 4496-4502.
[3]  WIDEN J, JAHN S, REICH S, et al. Cladding of aluminum substrates with iron based wear resistant materials [J]. Surface & Coatings Technology, 2008, 202(18): 4509-4514.
[4]  VISWANATHAN A, SASTIKUMAR D, KUMAR HARISH, et al. Formation of WC-iron silicide (Fe5Si3) composite clad layer on AISI 316L stainless steel by high power (CO2) laser [J]. Surface & Coatings Technology, 2009, 203(12): 1618-1623.
[5]  AMADO J M, TOBAR M J, ALVAREZ J C, et al. Laser cladding of tungsten carbides hardfacing alloys for the mining and mineral industry [J]. Applied Surface Science, 2009, 255(10): 5553-5556.
[6]  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, 2006, 39(6): 1169-1173.
[7]  XIE Guo-zhi, LU Yi-jun, HE Zi-yi, et al. Microstructure and corrosion properties of plasma-sprayed NiCr-Cr3C2 coatings comparison with different post treatment[J]. Surface & Coatings Technology, 2008, 202(13): 2885-2890.
[8]  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, 34(3): 189-191.
[9]  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(5): 1646-1653.
[10]  查莹,周昌炽,唐西南,等. 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, 26(10): 947-950.
[11]  TOBAR M J, LVAREZ C, AMADO J M, et al. Morphology and characterization of laser clad composite NiCrBSi-WC coatings on stainless steel [J]. Surface & Coatings Technology, 2006, 200(22-23): 6313-6317.
[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, 31(4): 505-508.
[13]  李强,张永忠,李劲风,等. 激光熔覆316L不锈钢涂层的结构与腐蚀性能[J]. 激光技术, 2004, 28(3): 237-240.
[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, 35(2): 13-16.
[15]  张春华,张松,文効忠,等. 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, 34(5): 701-704.
[16]  ZHOU Sheng-feng, HUANG Yong-jun, ZENG Xiao-yan. A study of Ni-based WC composite coatings by laser induction hybrid rapid cladding with elliptical spot [J]. Applied Surface Science, 2008, 254(10): 3110-3119.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133