For higher tool life of cutting inserts cryogenic treatment is considered as the most prominent method but no substantial researches have been found concerning the impact of cryogenic treatment on cermet inserts especially in hard turning. Therefore, in the present experimental investigation, the comparative assessment of various responses such as cutting force, flank wear, crater wear, chip morphology and surface roughness were carried out during machining of hardened steel with both untreated and cryo treated cermet inserts hard turning under dry cutting condition. Lastly, the input variables were optimized using Response surface methodology (RSM) to evaluate the tool life for the economic analysis. The experimental result demonstrated that the uncoated deep cryo treated with tempered cermet insert delivered better results in comparison to other cermet inserts. According to cost analysis, uncoated and deep cryo treated with tempered cermet insert was found to be the most economical among other cermet inserts at the optimum cutting condition.

中文翻译：

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未经处理和低温处理的金属陶瓷镶件的AISI 4340钢精加工干硬车削过程中的可加工性研究和成本估算

为了延长切削刀片的刀具寿命，低温处理被认为是最重要的方法，但是尚未发现有关低温处理对金属陶瓷刀片的影响的大量研究，尤其是在硬车削中。因此，在本实验研究中，在对未经处理和低温处理的金属陶瓷刀片在干态下硬车削加工的硬化钢进行加工时，对切削力，后刀面磨损，弹坑磨损，切屑形态和表面粗糙度等各种响应进行了比较评估。切割条件。最后，使用响应曲面方法（RSM）对输入变量进行优化，以评估工具寿命以进行经济分析。实验结果表明，与其他金属陶瓷刀片相比，用回火金属陶瓷刀片处理的未涂层深冷器可提供更好的结果。根据成本分析，在最佳切削条件下，经回火的金属陶瓷刀片处理的未涂层和深冷器是其他金属陶瓷刀片中最经济的。