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Optimization of tribological parameters over WC-12%Co laser alloyed pearlitic ductile iron using Taguchi based Grey relational analysis
Journal of Central South University ( IF 4.4 ) Pub Date : 2020-04-15 , DOI: 10.1007/s11771-020-4327-9
N. Jeyaprakash , Che-hua Yang , Sheng-po Tseng

Pearlitic ductile irons (PDIs) are used in transportation and nuclear energy industries. In heavy loading situation, the service life of PDI is affected by numerous tribo aspects. In this study, surface of the PDI is alloyed with WC-12%Co powder using a high power fibre laser. The wear properties of the base material and laser alloying samples were investigated by tribometer with various parameters, i.e., temperature, load and sliding speed. Based on experimental test, the load has maximum percentage of contribution and followed by sliding speed and working temperature. The optimized tribological parameters by Grey relational analysis (GRA) were established and those values are closely matched with predicted values. Besides, base material and laser alloying surfaces were examined through Vickers hardness machine, scanning electron microscopy (SEM) and roughness tester. The laser altered specimen shows no defects and improves the wear properties than substrates. The identified optimal tribological parameters are load of 30 N, speed of 0.5 m/s and working temperature of 300 °C, and load of 30 N, speed of 0.5 m/s and working temperature of 200 °C for base metal and laser alloying samples, respectively.



中文翻译:

基于Taguchi的灰色关联分析优化WC-12%Co激光珠光体球墨铸铁的摩擦学参数。

珠光体球墨铸铁(PDI)用于运输和核能工业。在重载情况下,PDI的使用寿命受众多摩擦因素的影响。在这项研究中,PDI的表面使用高功率光纤激光器与WC-12%Co粉末形成合金。用摩擦计通过各种参数,即温度,载荷和滑动速度,研究了基材和激光合金化样品的磨损性能。根据实验测试,负载具有最大的贡献百分比,其次是滑动速度和工作温度。建立了通过灰色关联分析(GRA)进行优化的摩擦学参数,并将这些值与预测值紧密匹配。此外,通过维氏硬度计对基材和激光合金化表面进行了检查,扫描电子显微镜(SEM)和粗糙度测试仪。激光蚀变的样品没有任何缺陷,并且比基材具有更高的耐磨性。确定的最佳摩擦学参数是:贱金属和激光合金的载荷为30 N,速度为0.5 m / s,工作温度为300°C,载荷为30 N,速度为0.5 m / s,工作温度为200°C样本。

更新日期:2020-04-15
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