Simulation and Experimental Verification of Grain Growth of H13 Steel Electron Beam Surface Treatment

摘要

Based on the actual electron beam scanning process of the surface of H13 steel specimen, a two-dimensional model of grain growth is established coupling Monte Carlo method. The crystallization of the molten pool is simulated after electron beam scanning of H13 steel, effects of scanning current and rate on the size of the molten pool are discussed. Results show that the bottom layer of the molten pool is fine equiaxed grains, columnar grains are formed in the middle of the molten pool, and the upside is course equiaxed grains. The increase of the scanning current promotes the grain size and the increase of the scanning speed reduces the grain size. The grain size and growth direction of the gold phase are basically the same with the simulation results. Through the study of the grain growth of the molten pool on the surface of H13 steel scanned with electron beam, better process parameters and material properties can be obtained.