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为扩大船用NbV微合金化10CrNiMnMoV钢的应用范围,改善其表面性能(主要是提高其耐磨性),利用高功率CO2激光对其进行了表面熔凝处理,研究了不同激光功率对其组织的影响。结果表明:随激光功率的增加,熔凝区形成的组织分别为细小马氏体和铁素体以及极少量的粒状贝氏体(3.5kW)、板条马氏体和马氏体间的少量铁素体(4kW和4.5kW)、板条马氏体组织(5kW)。热影响区上部主要形成了细小的马氏体组织,下部的组织主要是铁素体、珠光体、少量马氏体和粒状贝氏体及细小碳化物。
In order to expand the application scope of marine NbV microalloyed 10CrNiMnMoV steel and improve its surface properties (mainly to improve its wear resistance), the surface was fused with high-power CO2 laser to study the effects of different laser powers on the microstructure influences. The results show that with the increase of laser power, the microstructure of the melting zone is composed of fine martensite and ferrite and a very small amount of granular bainite (3.5kW), a small amount of lath martensite and martensite Ferrite (4kW and 4.5kW), lath martensite (5kW). The upper part of the heat-affected zone mainly formed small martensite, the lower part of the organization is mainly ferrite, pearlite, a small amount of martensite and granular bainite and fine carbide.