摘要
研制开发的履带板用钢ZG31Mn2SiREB采用铸造后直接淬火,研究了淬火温度对其力学性能的影响,分析了不同淬火温度下的微区成分及显微硬度。结果表明,随淬火温度的升高,钢的抗拉强度和冲击功明显增加。1050℃淬火比880℃淬火抗拉强度提高了270MPa,冲击功提高了6.5J;随着淬火温度的提高,显微硬度和化学成分波动明显减小,说明在较高温度下淬火能获得较均匀的组织和成分;铸态组织极不均匀,应在淬火前进行正火预处理,淬火温度也不宜过高。
The R＆D ZG31Mn2SiREB steel was directly quenched after casting. The effect of quenching temperature on mechanical properties was studied, and the micro-area composition and microhardness in different quenching temperature were investigated. The results show that tensile strength and impact energy increase obviously with the elevating of quenching temperature. The tensile strength and impact energy quenched at 1050℃ are 270 MPa and 6. 5 J more than that at 880℃, respectively. With the increase of quenching temperature, the fluctuation of microhardness and chemical composition becomes obviously small. This means that the relative homogeneous structure and composition can be acqu;.red in higher temperature. The as-cast microstructure is extremely uneven, so pre-treatment process of normalization ought to be carried out before quenching treatment, and quenching temperature should not be too high.
出处
《金属热处理》
CAS
CSCD
北大核心
2009年第1期39-42,共4页
Heat Treatment of Metals
基金
清华大学博士后流动站中国一拖集团博士后工作站项目(2005-1)
关键词
履带板
淬火温度
抗拉强度
冲击功
微区成分均匀性
caterpillar board
quenching temperature
tensile strength
impact energy
uniformity of micro-area chemical composition
