Effect of RE-Al-N on Structures and Properties of M2 Cast High Speed Steel
来源期刊：JOURNAL OF RARE EARTHS2003年第6期
论文作者：符寒光 蒋志强 邢建东 杜建铭
Key words：metal materials; high speed steel; RE-Al-N; modification; thermal fatigue; wear resistance; rare earths;
Abstract: 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.
符寒光1，蒋志强2，邢建东1，杜建铭2
(1.School of Materials Science & Engineering, Xi′an Jiaotong University, Xi′an 710049, China;
2.School of Mechanical Engineering, Xi′an Jiaotong University, Xi′an 710049, China)
Abstract: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.
Key words:metal materials; high speed steel; RE-Al-N; modification; thermal fatigue; wear resistance; rare earths;
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