摘要
运用ANSYS有限元分析软件对Mn13高锰钢基体上单道等离子熔覆Ni60A镍基合金过程的温度场进行了数值模拟分析,并通过对比模拟与试验所得熔池数据来验证模型的可靠性。采用扫描电镜、X射线衍射仪、显微硬度计、材料表面性能综合测试仪对熔覆层显微组织、物相、显微硬度、摩擦磨损性能进行了分析。在不同熔覆功率和扫描速率下,通过对基体表面选定节点的最高温度、稀释率、熔深、熔宽和热影响区深度的综合对比,得出等离子熔覆镍基合金最佳工艺参数为:熔覆功率2.0 k W,扫描速率150 mm/min。熔覆层组织晶粒细小,从外到里依次为细小等轴晶、树枝晶和胞状晶。熔覆处理后高锰钢的显微硬度和耐磨性均得到显著提高。
The temperature field during single-track plasma cladding of Ni60 A nickel-based superalloy on Mn13 high-manganese steel substrate was numerically simulated by ANSYS, a finite element analysis software. The reliability of the model was verified by comparing the calculated and measured results about the dimensions of molten pool. The microstructure, phase composition, microhardness and tribological properties of cladding layer were characterized by scanning electron microscope, X-ray diffractometer, microhardness meter, and material surface comprehensive performance tester. The highest temperature of selected node at substrate surface, dilution rate, depth and width of molten pool, and depth of heat-affected zone were compared under different plasma arc powers and scan rate. The optimal cladding parameters were obtained as follows: plasma arc power 2.0 k W and scan rate 150 mm/min. The microstructure of cladding layer is characterized by small grains which are equiaxed, dendritic and cellular from outside to inside successively. The clad high-manganese steel has improved microhardness and wear resistance.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2016年第6期325-330,339,共6页
Electroplating & Finishing
关键词
高锰钢
镍基高温合金
等离子熔覆
温度场
数值模拟
显微组织
显微硬度
high-manganese steel
nickel-based superalloy
plasma cladding
temperature field
numerical simulation
microstructure
microhardness