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Wear mechanism and tool life prediction of high-strength vermicular graphite cast iron tools for high-efficiency cutting
Wear ( IF 5 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.wear.2020.203319
Yongchuan Lin , Shengjian He , Debin Lai , Jueyu Wei , Quanxin Ji , Jianyou Huang , Mingzhang Pan

Abstract Vermicular graphite cast iron is not used widely because of the challenges associated with to processing. This study investigates the tool wear morphology and main wear mechanism during the turning of high-strength vermicular graphite cast iron using coated ceramic tools. Further, it develops a tool life prediction model, based on the grey theory, for the flank face of the tool. The results show that coated ceramic tools are more suitable than cemented carbide tools for the turning of vermicular graphite cast iron. Coated ceramic tools mainly exhibit adhesive, abrasive, and diffusion wear during low-speed cutting wherein the turning speed V c ≤ 200 m / min . The FeO layer formed by the oxidation of the workpiece attached to the tool tip can appropriately reduce the tool wear. During high-speed cutting ( V c > 400 m / min ), coated ceramic tools mainly show oxidative and diffusion wear and a certain degree of abrasive wear. As the turning speed increases, the diffusion wear of coated ceramic tools initially increases and then decreases. The analysis of the model prediction results shows that the short-term prediction error of the grey model is less than 5%.

中文翻译:

高效切削用高强度蠕墨铸铁刀具磨损机理及刀具寿命预测

摘要 由于与加工相关的挑战,蠕墨铸铁未被广泛使用。本研究研究了使用涂层陶瓷刀具车削高强度蠕墨铸铁时刀具的磨损形态和主要磨损机制。此外,它开发了基于灰色理论的刀具后刀面刀具寿命预测模型。结果表明涂层陶瓷刀具比硬质合金刀具更适合车削蠕墨铸铁。涂层陶瓷刀具在车削速度V c ≤ 200 m/min 的低速切削过程中主要表现出粘附磨损、磨蚀磨损和扩散磨损。附着在刀尖上的工件氧化形成的FeO层可以适当降低刀具磨损。高速切削时(V c > 400 m/min),涂层陶瓷刀具主要表现为氧化磨损和扩散磨损以及一定程度的磨粒磨损。随着车削速度的增加,涂层陶瓷刀具的扩散磨损先增大后减小。模型预测结果分析表明,灰色模型的短期预测误差小于5%。
更新日期:2020-08-01
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