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首页> 外文期刊>Mechanics & Industry >Experimental investigation of various machining attributes and cost estimation during machining of hardened AISI 4340 steel with untreated and cryo treated cermet inserts
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Experimental investigation of various machining attributes and cost estimation during machining of hardened AISI 4340 steel with untreated and cryo treated cermet inserts

机译：用未处理和冷冻处理金属陶瓷插入淬火AISI 4340钢加工过程中各种加工属性和成本估计的实验研究

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摘要

Now-a-days due to growing demand of high precision components to attain high performances, hardened steels with hardness above 45HRC have numerous applications in automotive gear, machine tool and die industry because of their superior characteristics (high thermal stability, high indentation resistance, high abrasiveness, low ductility and high value of hardness to modulus of elasticity ratio). For this, 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 turning of hardened steels. 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 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 cost saving among other cermet inserts at the optimum cutting condition.
机译：现在 - 一个日期，由于高精度部件的需求不断增长以获得高性能，硬度高于45HRC的硬质钢在汽车齿轮，机床和模具行业中具有许多应用，因为它们具有优异的特性（高热稳定性，高压凹槽，高磨料，低延展性和硬度的硬度高值与弹性比模量）。为此，较高的切削刀片低温治疗的刀具寿命被认为是最突出的方法，但没有发现关于低温处理对金属陶瓷插入物的影响的实质性研究，特别是在硬化钢的转弯方面。因此，在本实验研究中，在用干切削下的未处理和冷冻处理的金属陶瓷插入干切割过程中，在切割钢的加工过程中进行了各种反应的比较评估如切割力，侧面磨损，火山口磨损，芯片形态和表面粗糙度健康）状况。最后，使用响应表面方法（RSM）进行了优化的输入变量，以评估经济分析的刀具寿命。实验结果表明，与其他金属陶瓷插入件相比，用钢化金属陶瓷插入件的未涂覆的深度冷冻处理的结果更好。根据成本分析，发现用钢化金属陶瓷插入件的未涂覆和深度冷冻处理是在最佳切割条件下的其他金属陶瓷插入物中最具成本的节省。

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