【摘要】 为了研究不同热输入对高锰钢组织性能的影响，利用GLEEBLE 3500热力模拟试验机对高锰钢进行了不同峰值温度和线能量的热模拟试验，并对热模拟试样进行了微观组织、冲击韧性和显微硬度分布等表征。结果表明，随着线能量的增加，试样冲击韧性和硬度呈现出下降趋势，硬度与平均晶粒尺寸平方根倒数呈现很好的线性相关性。峰值温度Tm=1 300℃时，试样中出现的微裂纹是冲击韧性显著降低的主要原因。更多还原

【Abstract】 In order to study the effects of different heat inputs on the microstructure and properties of high manganese steel,thermal simulation tests of high manganese steel with different peak temperature and linear energy were carried out by GLEEBLE 3500 thermal simulation testing machine. The microstructure, impact toughness and microhardness distribution of the thermal simulation samples were characterized. The results indicate that the impact toughness and hardness of the sample decrease with the increase of linear energy, and the hardness has a good linear correlation with the reciprocal square root of the average grain size. When the peak temperature Tm=1 300 ℃, the microcracks in the sample are the main reason for the significant reduction of impact toughness.更多还原