运用XRD、SEM及显微硬度试验等手段研究了激光熔覆Co包铸造(WC+W2C)p曾强Ni基合金复合涂层的微观组织特征,分析了Co包铸态(WC+W2C)p在激光熔覆过程中的冶金行为.研究结果表明:在激光熔覆过程中,(WC+W2C)p的Co包覆层完全熔化,(WC+W2C)p本身也发生部分溶解,其稳定性随W2C/WC比增大而降低;当熔池凝固时,(WC+W2C)p在涂层中的分布主要受激光熔池中存在的强烈对流和颗粒/凝固前沿相互作用所控制;依赖于局部成分,涂层中形成变成分的η1-M6C(M=Co、W、Ni)型碳化物,优先分布在(WC+W2C)p表面;涂层基体的典型组织由分布在γ-Ni+M23C6为主加硼化物Ni4B3、Ni3b和碳化物M7C3的伪多元共晶中的η1-M6C组成.
参考文献
| [1] | Li Q;Chen WZ;Lei TC .Microstructural characterization of WC sub p reinforced Ni-Cr-B-Si-C composite coatings[J].Surface & Coatings Technology,1999(2/3):285-291. |
| [2] | Gassmann R C .Laser cladding with (WC+W2C)/Co-Cr-C and (WC+W2C)/Ni-B-Si composites for enhanced abrasive wear resistance[J].Materials Science and Technology,1996(12):691-696. |
| [3] | Cerri W;MARTINELIA R;MOR G P et al.Laser deposition of carbide-reinforced coatings[J].Surface and Coatings Technology,1991,49:40-45. |
| [4] | COOPER K P;SLEBODNICK P;THOMAS E D .Seawater corrosion behavior of laser surface modified Inconel 625alloy[J].Materials Science and Engineering,1996,A206:138-149. |
| [5] | 曾晓雁;吴新伟;陶曾毅 等.激光熔覆Ni-WC金属陶瓷层的耐磨性分析[J].金属学报,1997,33(08):885-890. |
| [6] | 张松;朱荆璞;谭朝鑫 .激光熔覆Ni基WC合金[J].材料科学进展,1990,4(02):168-173. |
| [7] | 吴萍;周昌炽;唐西南 .激光合金化熔覆制备耐磨陶瓷梯度涂层[J].金属学报,1994,30(11):508-512. |
| [8] | GASSMANN R;NOWOTONY St;LUFT A.Laser cladding of hard particles rich alloy[A].Laser Institute of America,1993:288-300. |
| [9] | 株洲硬质合金厂.硬质合金生产[M].北京:冶金工业出版社,1974 |
| [10] | 李强 .激光溶覆不同碳化物颗粒/Ni-Cr-B-Si-C复合涂层的微观组织[D].哈尔滨工业大学,1998. |
| [11] | ABBAS G;WEST D R F .Laser surface cladding of stellite and stellite-sic composite deposite for enhanced hardness and wear[J].Wear,1991,143(03):353-363. |
| [12] | STEFANESCU D M;DHINDAW B K.Behavior of insoluble particles at the solid/liquid interface[A].Metals Park,OH,ASM International,1988:142-147. |
| [13] | Mortensen A;JIN I .Solidification processing of metal matrix composites[J].International Materials Reviews,1992,37(03):116-121. |
| [14] | Shangguan D;AHUJA S;STEFANESCU D M .An analytical model for the interaction between an insoluble particle and an advancing solid/liquid interface[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1992,23:669-680. |
| [15] | Carcea I;AGOP M .Transition and equihbrium processes in metal-ceramic particle systems[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1995,26:3021-3025. |
| [16] | 韩青有;HUNT J D .凝固过程中的颗粒推斥[J].金属学报,1996,32(04):363-367. |
| [17] | 韩青有.颗粒推斥现象及其机理[J].材料导报,1994:91-96. |
| [18] | 李强,王富耻,雷廷权.激光熔覆Ni-Cr-B-Si-C合金的组织及其摩擦磨损特性[J].中国有色金属学报,1998(02):201-205. |
| [19] | 叶帷洪;王崇敬;罗英洁;阮允翔, 何瓞祺.钨-资源,冶金,性质和应用[M].北京:冶金工业出版社,1983 |
| [20] | Cottrell A H .Cohension in tungsten carbide[J].Materials Science and Technology,1995,11:209-212. |
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%