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摘要：
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为提高D2冷作模具扁钢轧材的使用寿命,进行了一系列实验与探究:在化学成分方面,采用添加稀土的方法;在最终热处理方面,采用正交实验法进行工艺优化,选用4个淬火温度,4个回火温度,两种回火次数和4种回火时间,再综合考虑是否添加稀土等因素,通过大量实验对比,优选出一个最佳热处理工艺,与原生产工艺下的材质相比,试样的耐磨性和冲击韧性均大为改善,从而达到提高D2模具扁钢轧材使用寿命的目的。
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In order to increase the service life of the D2 die steel rolled section for cold working, a series of experiments and investigations are finished according to that as far as the chemical composition is concerned , the way of increasing Re is adopted; For the finished heat treatment, we adopt normal experiment to seek optimum technology and select four quenching temperature points ,four tempering temperature points and two tempering times as well as four tempering time; Afterwards we make the consideration of whether we will increase Re or not and finally ,we choose out the optimum heat treatment technology by a lot of trial comparisons. Compared with the material under the former technology condition, we find that the material properties are greatly improved on the wearability , impact toughness and so that the purpose to increase the service life of D2 dies has been realized.
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基金项目：
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作者简介：
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参考文献：
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[1] 孙珍宝.合金钢手册[M].北京:冶金工业出版社,1984.
[2] 余宗森.稀土在钢铁中的应用[M].北京:冶金工业出版社,1987.
[3] 李慧.钢铁冶金概论[M].北京:冶金工业出版社,1993.
[4] 中国科学院数学研究所统计组.常用数理统计方法[M].北京:科学出版社,1979.
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