Surface improvement of coining dies with DLC films

被引：9

作者：

Mori, Hideaki ^{[1
]}

Shibata, Yukikazu ^{[1
]}

Araki, Shyunji ^{[1
]}

Imanara, Tadahiko ^{[1
]}

Sakamoto, Katsumi ^{[1
]}

Yama, Yoshinori ^{[1
]}

机构：

[1] Japan Mint, Lab, Kita Ku, Osaka 5300043, Japan

来源：

11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014 | 2014年 / 81卷

关键词：

Coining dies; Proof coins; Cr-plating; DLC films; Unbalanced magnetron sputtering; Surface roughness;

D O I：

10.1016/j.proeng.2014.10.259

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Because coining dies are consumables, most of mints have adopted the hard surface coating on coining dies in order to increase the wear resistance of them. Even though coining dies for "proof coins" are coated by Cr-plating, they have especially short life time. Instead of Cr-plating, we tried to apply Diamond-Like Carbon (DLC) film for proof coins. In order to examine the effect of the DLC films, proof coins were actually produced with the DLC coated dies. In consequence, the die life using DLC coating is estimated to be more than twice as long as that for Cr-plating. (C) 2014 Published by Elsevier Ltd.

引用

页码：1933 / 1938

页数：6