摘要
研究了宽带激光熔覆铸造 WCp/ Ni梯度复合涂层的组织和性能。结果表明 ,熔覆层与基材之间实现了冶金结合。熔覆层由基体组织γ- Ni枝晶、共晶组织γ- Ni+M2 3C6 、未熔铸造 WCp以及M6 C、M7C3、M2 3C6 组成。熔覆层内硬度分布均匀 ,从熔覆层至基材的硬度变化平缓 ,避免了裂纹的产生。熔覆层的耐磨性随 WCp含量的增加而提高。 19- 4号试样的耐磨性最好 ,比基材提高了
The microstructure and properties of WCp/Ni gradient composite coating formed by wide band laser cladding were studied. The experimental results indicated that the metallurgical bonding is formed between cladding coating and substrate. The microstructures of coating are composed of γ Ni dendrite, eutectic structure γ Ni+M 23 C 6、 cast WCp、 M 6C、 M 7C 3 and M 23 C 6. The microhardness distribution of cladding layer is homogeneous. The microhardness transition from coating to substrate is smooth . The wear resistance of cladding coating is increased as increase of cast WCp content. The wear resistance of sample 19 4 is the highest one that is four times greater than that of substrate.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2001年第4期53-57,共5页
Journal of Iron and Steel Research
基金
教育部高等学校国家重点实验室访问学者基金 (2 0 0 0 -10 5 )
贵州省科技厅自然科学基金 (2 0 0 0 ) (3 0 2 4)
关键词
宽带激光熔覆
梯度复合涂层
组织
性能
碳化钨/镍基合金
wide band laser cladding
WCp/Ni base cast alloy
gradient composite coating
microstructure
properties
