首页> 外文期刊>Arabian Journal for Science and Engineering >Investigation of Micro-Hardness in Electrical Discharge Alloying of En31 Tool Steel with Cu–W Powder Metallurgy Electrode
【24h】

Investigation of Micro-Hardness in Electrical Discharge Alloying of En31 Tool Steel with Cu–W Powder Metallurgy Electrode

机译:Cu31粉末冶金电极对En31工具钢放电合金化的显微硬度的研究

获取原文
获取原文并翻译 | 示例
       

摘要

In the present study, efforts have been made to identify favorable conditions to enhance surface micro-hardness (MH) of En31 tool steel using Cu-W tool manufactured by powder metallurgy (PM) in electrical discharge alloying (EDA) process. Taguchi method was followed to get combination of six process variables for achieving best MH. Peak current emerged as the major factor to influence the MH of the alloyed layer, although tool polarity, percentage of alloying element in PM tool, pulse on-time, duty factor and discharge voltage were also found significant. MH measurement, scanning electron microscopy, optical microscopy, EDS and XRD were carried out to find micro-geometrical, micro-structural, chemical and mechanical changes in the machined surface. Under favorable conditions for MH, noteworthy enhancement in percentage of carbon and tungsten was observed. The presence of hard tungsten carbide () and cementite () on the machined surface were related to the observed substantial increase in MH (). Results indicated that MH improvement can be carried out devoid of any disadvantageous effect on surface quality using EDA process.
机译:在本研究中,已努力寻找有利条件,以利用粉末冶金(PM)在放电合金化(EDA)工艺中制造的Cu-W工具来提高En31工具钢的表面显微硬度(MH)。采用田口方法获得六个工艺变量的组合,以实现最佳MH。峰值电流已成为影响合金层MH的主要因素,尽管工具极性,PM工具中合金元素的百分比,脉冲接通时间,占空比和放电电压也很重要。进行了MH测量,扫描电子显微镜,光学显微镜,EDS和XRD,以发现加工表面的微观几何,微观结构,化学和机械变化。在MH的有利条件下,观察到碳和钨的百分比显着提高。在加工表面上存在硬质碳化钨()和渗碳体()与观察到的MH()的大幅增加有关。结果表明,使用EDA工艺可以进行MH改进,而不会对表面质量产生任何不利影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号