发明名称 High hardness sintered compact and process for producing the same.
摘要 <p>@ Herein is disclosed a high hardness sintered diamond compact and a process for the production of the same.</p><p>The high hardness sintered diamond compact comprises 80 to 95% by volume of diamond particles, 0.5 to 5% by volume of a carbide particles selected from a group consisting of WC and (MoW)C and having a diameter not larger than 1 micron, and 4.5 to 15% by volume of an iron group metal, at least 95% by volume of said diamond particles having a diameter from 0.1 to 2 micron and the remainder of the diamond particles being particles having a diameter smaller than 0.1 micron.</p><p>The ratio by volume of the amount of the diamond particles having a diameter from 1 to 2 micron to that of the diamond particles having a diameter from 0.1 to 1 micron ranges from 4 to 1.</p><p>The high hardness sintered diamond compact according to the present invention is preferably usable as a drawing die for drawing a high hardness plated-steel wire and as a tool bit.</p><p>The process according to the invention, comprises the steps of: &lt;UnorderedLists id="ula01" listStyle="none"&gt;&lt;ListItem&gt;preparing a diamond powder having a particle diameter distribution from 0.2 to 2 micron;&lt;/ListItem&gt;&lt;ListItem&gt;mixing the diamond powder with an iron group metal and one member selected from the group consisting of WC and (Mo,W)C powders each having a particle diameter not larger than 1 micron;&lt;/ListItem&gt;&lt;ListItem&gt;hot-pressing the thus obtained mixture of powders at an ultra-high pressure and a high temperature where diamond may be stable.&lt;/ListItem&gt;&lt;/UnorderedLists&gt;</p>
申请公布号 EP0181979(A1) 申请公布日期 1986.05.28
申请号 EP19840308074 申请日期 1984.11.21
申请人 SUMITOMO ELECTRIC INDUSTRIES LIMITED 发明人 NAKAI, TETSUO;YAZU, SYUZI;ASAI, KEIZO;KUMAZAWA, YOSHIAKI
分类号 B01J3/06;C22C26/00;(IPC1-7):C22C26/00 主分类号 B01J3/06
代理机构 代理人
主权项
地址