M2 cast high speed steel was inoculated by addition of rare earth(RE)-Al-N, network eutectic carbides were eliminated, matrix microstructures were refined and the segregation of tungsten and molybdenum elements was re...M2 cast high speed steel was inoculated by addition of rare earth(RE)-Al-N, network eutectic carbides were eliminated, matrix microstructures were refined and the segregation of tungsten and molybdenum elements was relieved. In the condition that the hardness does not decrease, impact toughness obviously increases. Quenching at 1180 ℃ and three-times tempering at 560 ℃, the hardness of M2 cast high speed steel is 65～66 HRC, and impact toughness reaches 21.3 (J·cm^(-2)). Modified M2 cast high speed steel has excellent thermal fatigue resistance and high temperature wear resistance. Roller made in modified M2 cast high speed steel has excellent service effect when it is used in slit rolling mill of hot rolling bar mill.展开更多
用RE Al N对M2铸造高速钢进行变质处理,消除了钢中网状共晶碳化物,并细化了基体组织,还可减轻W、Mo元素偏析,在不降低M2高速钢硬度的情况下,韧性大幅度提高,经1180～1200℃淬火,560℃三次回火后,硬度保持在65～66HRC,冲击韧度由10.6J/cm...用RE Al N对M2铸造高速钢进行变质处理,消除了钢中网状共晶碳化物,并细化了基体组织,还可减轻W、Mo元素偏析,在不降低M2高速钢硬度的情况下,韧性大幅度提高,经1180～1200℃淬火,560℃三次回火后,硬度保持在65～66HRC,冲击韧度由10.6J/cm2提高到21.3J/cm2。变质处理M2铸造高速钢具有优异的抗热疲劳性能和抗高温磨损性能。展开更多
文摘M2 cast high speed steel was inoculated by addition of rare earth(RE)-Al-N, network eutectic carbides were eliminated, matrix microstructures were refined and the segregation of tungsten and molybdenum elements was relieved. In the condition that the hardness does not decrease, impact toughness obviously increases. Quenching at 1180 ℃ and three-times tempering at 560 ℃, the hardness of M2 cast high speed steel is 65～66 HRC, and impact toughness reaches 21.3 (J·cm^(-2)). Modified M2 cast high speed steel has excellent thermal fatigue resistance and high temperature wear resistance. Roller made in modified M2 cast high speed steel has excellent service effect when it is used in slit rolling mill of hot rolling bar mill.
文摘用RE Al N对M2铸造高速钢进行变质处理,消除了钢中网状共晶碳化物,并细化了基体组织,还可减轻W、Mo元素偏析,在不降低M2高速钢硬度的情况下,韧性大幅度提高,经1180～1200℃淬火,560℃三次回火后,硬度保持在65～66HRC,冲击韧度由10.6J/cm2提高到21.3J/cm2。变质处理M2铸造高速钢具有优异的抗热疲劳性能和抗高温磨损性能。
