超重型切削过程硬质合金刀具高温力学特性

发布时间：2018-11-06 15:19

【摘要】：超重型切削过程中,刀具的高温失效是硬质合金刀具破损的主要形式之一。首先,通过理论分析、切削仿真及数学模型进行切削热产生过程分析,并研究切削温度对硬质合金刀具变形抗力的影响;然后,进行切削温度及材料高温硬度测量实验,实验结果验证模型有效,硬质合金和工件材料试块的硬度在1000℃时分别下降了28%和60%左右;最后,从刀具几何结构优化设计和复合涂层技术两方面提出超重型切削专用硬质合金刀具抗高温性能的提效措施,在5组切削参数下进行刀具寿命对比实验,优化设计的XF8刀具寿命是YT15刀具的2~5倍。研究结果可以为重型高效切削刀具技术的研究及推广提供借鉴。
[Abstract]:The high temperature failure of cutting tools is one of the main forms of carbide cutting tool breakage. Firstly, through theoretical analysis, cutting simulation and mathematical model, the process of cutting heat generation is analyzed, and the influence of cutting temperature on the deformation resistance of cemented carbide tools is studied. Then, the cutting temperature and the hardness of the material at high temperature are measured. The experimental results show that the model is effective. The hardness of the cemented carbide and the workpiece is decreased by about 28% and 60% at 1000 鈩，

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