Research about Microstructure and Wear Resistance of Hardfacing Layer on Big Cold Trimming Die Insert
Its simple technology to manufacture big trimming die by hardfacing on the die insert of cast iron. The chemical composition, microstructure, micro-hardness, wear resistance and wear mechanism of the hardfacing layer were studied. The experimental results indicate that the hardfacing technology has much more advantages and cheaper than that of traditional process. The chemical composition, microstructure, micro-hardness of the hardfacing metal are all satisfied for manufacturing the big trimming die by welding on die insert of cast iron. The wear resistant test of hardfacing layers were carried out by using two different electrodes. The wear resistance of new electrode hardfacing layer is higher than that of normal hardfacing electrode D322. The wear mechanism of hardfacing layer is belongs to abrasive wear model. The life of hardfacing die insert is as long as tool steel insert which was fully heat-treated. More than 25000 workpieces can be carried out by using the hardfacing die insert. The life of repaired cold die with new kind of hardfacing electrode bar can be raised up to 30-50％ than hardfaced with the electrode D322 under the same condition.
hardfacing die insert wear resistance wear mechanism microstructure structure
SHI Jian-ping HE Bo-lin YU Ying-xia
China academy of railway sciences,Beijing 100081 China School of Mechanical & Electrical Engineering,East China Jiaotong University,Nanchang 330013,China
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
618-620
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）