摘要
以Ni60作为粘接金属,掺入纳米WC为增强相,在16Mn钢表面用激光熔覆技术制备具有高耐磨性、高硬度和无裂纹的金属基复合材料熔覆层,分析了纯Ni60和不同含量纳米WC熔覆层的微观组织。在相同工艺条件下,讨论了纳米WC含量对熔覆层金相组织和表面硬度的影响,为制备高性能且与基体呈冶金结合的熔覆层提供了依据。结果表明,含纳米WC的合金粉末熔覆层硬度均高于纯Ni60粉末熔覆硬度,且随着纳米WC含量的增加,熔覆层表面硬度也增大,当纳米WC含量达到5%时,熔覆层表面出现了裂纹。
Taking Ni60 as bonding metals, mixing with nano WC to strengthen phase, metal matrix composite cladding layer with high wear resistance preparation, high hardness and no crack was prepared on the 16 Mn steel＇s surface. The cladding layer＇s microstructure with pure Ni60 and different nano WC＇s content were analyzed. Under the same condition, the influence of the nano WC content on the hardness and the metallographic structure of cladding layer surface were discussed, which provides the experimental basis for manufacturing high performance composite coating. The results show that the hardness of layer with nano WC is higher that that of pure Nil60 powder. And, the surface hardness of layer enhances along with the quantity ofnano WC increasing. When the content ofnano WC reaches to 5%, cracks appear on the layer surface.
出处
《热加工工艺》
CSCD
北大核心
2011年第24期171-173,共3页
Hot Working Technology
基金
国家自然科学基金资助项目(51075351)
关键词
激光熔覆
纳米WC
熔覆层
laser cladding
nano WC
cladding layer
