摘要
为了改善45钢表面的耐磨性能,采用CO2激光束在45钢表面进行铬钼硼合金化,以获得高耐磨性的合金复合涂层。利用SEM,XRD,EDS,HVS-1000显微维氏硬度计,MMS-2A型屏显式摩擦磨损试验机,对涂层组织结构与耐磨性进行了分析。结果表明,胞状晶是主要的合金层组织,并在胞状晶上弥散分布着通过原位合成而形成的高硬度合金碳化物,其中,合金层显微硬度最大值为860 HV,是基材的近3倍,其平均耐磨性也是基材的近3倍。
To improve the 45 steel＇ s wear resistance, chromium, molybdenum and boron were alloyed on 45 steel by CO2 laser to obtain excellent wear resistance composite coating. The organizational structure and wear resistance of the alloying layer were characterized by SEM, XRD, EDS, HVS-1000 micro-hardness tester and MMS-2A screen displayed friction tester. The experimental results indicated that the organizational structure of the alloying layer is principally cell crystal. The high hardness carbides formed by in-situ are distributed in cell crystal. The highest micro-hardness value of the alloying layer is 860 HV, which is nearly three times of substmte and the average wear resistance of the alloying layer also is approximately three times of substrate.
出处
《铸造技术》
CAS
北大核心
2012年第8期939-941,共3页
Foundry Technology
关键词
45钢
激光合金化
组织结构
耐磨性能
45 steel
laser alloying
organizational structure
wear resistance
