【摘要】 在1020～1140℃温度范围内,随水韧处理温度的升高,保温时间越长晶粒越粗大;硬度变化范围HBS212～216,而冲击韧性随着温度的升高而增加,达到最大值后随温度升高而降低;在1110℃时,试样HBS215,αK=179J/cm2,且试样金相组织中奥氏体已转变完全,晶粒度达到5～6级。更多还原

【Abstract】 In a temperature range of 1 020~1 140 ℃, the higher the water toughening temperature and the longer the holding time, the coarser the grains; the variation range of hardness is HBS 212-216, however, the impact toughness increases with the increase of temperature at first, then it will decrease after its value up to maximum. When the temperature of water toughening is 1 110 ℃, the hardness of the sample is HBS 215; ak=179 J/cm2; the grain size achieves 5-6 level and the austenite transformation in the microstructures of the samples will be finished completely.更多还原