许锴,刘菊东,赵晓峰,蔡培松

• 1:集美大学海洋装备与机械工程学院

摘要(Abstract)：

在平面磨床上采用白刚玉砂轮对灰铸铁HT250进行磨削淬硬试验，研究磨削用量对灰铸铁HT250磨削淬硬层的影响。结果表明：灰铸铁HT250磨削后淬硬层由表及里依次是熔化层、完全淬硬层、过渡层和基体。熔化层由二次渗碳体、残留奥氏体和碳化物组成；完全淬硬层由马氏体、残留奥氏体和条状石墨组成；过渡层由马氏体、珠光体、残留奥氏体和条状石墨组成。改变磨削用量对淬硬层高硬度区显微硬度值没有显著影响，其硬度在800～900 HV0.2之间。磨削深度增加或者工件进给速度减小，都会使淬硬层深度增大。磨削深度和工件进给速度会对淬硬层的均匀性产生影响，致使切入端、中间端、切出端淬硬层深度不同，在本试验条件下当进给速度v_w=0.4 m/min时淬硬层的均匀性较好。

关键词(KeyWords)： HT250;磨削用量;淬硬层;淬硬层深度;淬硬层均匀性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 许锴,刘菊东,赵晓峰,蔡培松

DOI: 10.13289/j.issn.1009-6264.2022-0035

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