摘要
为提高AISI316L奥氏体不锈钢的耐磨性能,采用CO2激光技术对其表面进行了激光熔覆Colmonoy 6合金涂层的研究。采用扫描电镜、能谱分析仪和X射线衍射仪对熔覆层微观组织结构进行了分析,并采用硬度计、摩擦磨损试验机等仪器对其性能进行了测定。研究发现激光熔覆前进行450℃预热及熔覆后的保温缓冷是防止裂纹产生的有效手段。试验结果表明,熔覆区凝固组织形态为典型的树枝晶,主要是由γ-Ni固溶体和M23(CB)6、BNi3及CrB等化合物相构成;熔覆层的表面硬度得到显著提高,摩擦系数相对较低,耐磨性相对提高了53倍。磨损形式为磨粒磨损。
It investigates cladding Colmonoy 6 powder on AISI316L austenitic stainless steel by CO2 laser in order to improve its wear resistance property.And its microstructure,microhardness,the friction and wear characteristics were systematically studied by means of SEM,EPMA,XRD,microhardness tester as well as friction and wear tester.It is found that preheating is necessary for preventing cracking in the laser cladding procedure and 450℃ is the proper preheating temperature.the microstructure of the laser clad layer is featured with densities and composed of γ-Ni,M23（CB）6,BNi3 and CrB.The friction and wear test reveals that the clad layer has not only low friction coefficient,but also high wear resistance compared to those of substrate,which reveals that laser cladding layer plays roles on wear resistance.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2010年第7期927-932,共6页
Acta Armamentarii
关键词
金属材料
不锈钢
激光熔覆
合金涂层
组织
耐磨性
metallic material
stainless steel
laser cladding
alloy coating
microstructure
wear resistance
