两种AC-HVAF喷涂WC涂层微观组织以及耐蚀性研究

材料工程, 2007, (8): 73-78. doi: 10.3969/j.issn.1001-4381.2007.08.018

两种AC-HVAF喷涂WC涂层微观组织以及耐蚀性研究

马光 ^1, , 王国刚 ^2, , 孙冬柏 ^3, , 樊自拴 ^4, , 俞宏英 ^5, , 孟惠民 ^6, , 王旭东 ^7,

1.北京科技大学,腐蚀与防护中心,北京,100083

2.北京科技大学,腐蚀与防护中心,北京,100083

3.北京科技大学,腐蚀与防护中心,北京,100083

4.北京科技大学,腐蚀与防护中心,北京,100083

5.北京科技大学,腐蚀与防护中心,北京,100083

6.北京科技大学,腐蚀与防护中心,北京,100083

7.北京科技大学,腐蚀与防护中心,北京,100083

基金项目: 北京市科技计划(H020420050021)

关键词： AC-HVAF , WC-10Co-4Cr , WC-12Co , 微观组织 , 电化学 , 盐雾

Investigation of Microstructures and Corrosion Resistance of Two Types of AC-HVAF Sprayed WC Coatings

利用AC-HAVF喷涂技术在0Cr13Ni5Mo不锈钢上制备了WC-10Co-4Cr,WC-12Co涂层,并利用XRD,SEM,电化学以及盐雾实验分析了涂层的微观组织以及耐蚀性.结果表明:两种涂层相组成与其粉末一致,未出现其他喷涂技术普遍存在的W2C以及W,AC-HAVF喷涂技术可以有效的抑制WC的分解;两种涂层都很致密且与基体结合良好,孔隙率低;电化学以及盐雾实验发现,WC-10Co-4Cr涂层的耐蚀性好于WC-12Co涂层,并较基体0Cr13Ni5Mo不锈钢有较大的提高,粘结相中Cr元素的加入以及孔隙率低是WC-10Co-4Cr涂层耐蚀性优异的重要原因.

参考文献

[1]	樊自拴,孙冬柏,俞宏英,李辉勤,孟惠民,张济山,乔力杰.超音速火焰喷涂技术研究进展[J].材料保护,2004(09):33-35.
[2]	JIN H W;KIM M C;PARK C G.Friction-induced solid state amorphization from non-equilibrium solid solution phase in Fe-Cr-B-Ni-Mo spray coatings[A].,2003:279-286.
[3]	ZIMMERMAN S;KELLER H;SCHWIER G.New carbide based materials for spraying[A].Ohio,USA:Asm international,Materials Park,2003:227-233.
[4]	V. Stoica;R. Ahmed;T. Itsukaichi;S. Tobe .Sliding wear evaluation of hot isostatically pressed (HIPed) thermal spray cermet coatings[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2004(11):1103-1124.
[5]	Qiao YF.;Fischer TE.;Dent A. .The effects of fuel chemistry and feedstock powder structure on the mechanical and tribological properties of HVOF thermal-sprayed WC-Co coatings with very fine structures[J].Surface & Coatings Technology,2003(1):24-41.
[6]	T. Sudaprasert;R. H. Shipway;D. G. McCartney .Sliding wear behaviour of HVOF sprayed WC-Co coatings deposited with both gas-fuelled and liquid-fuelled systems[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2003(7/12):943-949.
[7]	Li H;Khor KA;Yu LG;Cheang P .Microstructure modifications and phase transformation in plasma-sprayed WC-Co coatings following post-spray spark plasma sintering[J].Surface & Coatings Technology,2005(1):96-102.
[8]	H. Liao;B. Normand;C. Coddet .Influence of coating microstructure on the abrasive wear resistance of WC/Co cermet coatings[J].Surface & Coatings Technology,2000(2/3):235-242.
[9]	Cho JE;Hwang SY;Kim KY .Corrosion behavior of thermal sprayed WC cermet coatings having various metallic binders in strong acidic environment[J].Surface & Coatings Technology,2006(8):2653-2662.
[10]	Souza VAD.;Neville A. .Linking electrochemical corrosion behaviour and corrosion mechanisms of thermal spray cermet coatings (WC-CrNi and WC/CrC-CoCr)[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):202-211.

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