Abstract

Nowadays, precision manufacturing industries are required faster surface inspection tools for the achievement of high productivity. In this context, the Barkhausen noise (BN) technique is adopted as a quick response technique in the grinding for qualitative evaluation of surface integrity of AISI D2 tool steel. Present work investigates the effect of eco-friendly coolant, i.e., cryogenic, on surface integrity of ground sample in the plunge grinding mode at different downfeed and compared with dry and wet environments. Surface integrity was assessed in respect of surface roughness, microstructure, and microhardness. Magnetic response of ground surface was reported by Barkhausen noise analyzer in the form of root mean square (rms), peak, and number of pulses. From the outcomes, it was perceived that no significant variations were found in the microstructure and microhardness of the ground surface and subsurface after cryo-grinding owing to lower thermo-mechanical loading. Besides, lower surface roughness was obtained in the case of cryo-grinding because of thermal softening effect. A linear correlation between BN input parameters, i.e., magnetic field intensity and BN responses at different magnetizing frequency could be achieved. Finally, better BN responses, including higher rms, peak, and number of pulses, were found under the cryogenic environment.

中文翻译：

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磨削环境对AISI D2工具钢磁响应的影响

摘要

如今，精密制造行业需要更快的表面检测工具以实现高生产率。在此背景下，巴克豪森噪声 (BN) 技术被用作磨削中的快速响应技术，用于对 AISI D2 工具钢的表面完整性进行定性评估。目前的工作研究了环保冷却剂（即低温）对切入式磨削模式下不同下进给磨削样品表面完整性的影响，并与干湿环境进行了比较。根据表面粗糙度、微观结构和显微硬度评估表面完整性。巴克豪森噪声分析仪以均方根 (rms)、峰值和脉冲数的形式报告地表的磁响应。从结果来看，据认为，由于较低的热机械负荷，在低温研磨后，地面和次表面的微观结构和显微硬度没有显着变化。此外，由于热软化效应，在低温磨削的情况下获得较低的表面粗糙度。可以实现 BN 输入参数（即，不同磁化频率下的磁场强度和 BN 响应）之间的线性相关性。最后，在低温环境下发现了更好的 BN 响应，包括更高的 rms、峰值和脉冲数。可以实现 BN 输入参数（即，不同磁化频率下的磁场强度和 BN 响应）之间的线性相关性。最后，在低温环境下发现了更好的 BN 响应，包括更高的 rms、峰值和脉冲数。可以实现 BN 输入参数（即，不同磁化频率下的磁场强度和 BN 响应）之间的线性相关性。最后，在低温环境下发现了更好的 BN 响应，包括更高的 rms、峰值和脉冲数。