发明授权
- 专利标题： Multi-oxide coated carbide body and method of producing the same
- 专利标题（中）： 多氧化物涂层碳化物体及其制造方法
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申请号： US552222申请日： 1990-07-13
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公开(公告)号： US5137774A公开(公告)日： 1992-08-11
- 发明人: Sakari A. Ruppi
- 申请人： Sakari A. Ruppi
- 申请人地址： SEX Fagersta
- 专利权人： Seco Tools AB
- 当前专利权人： Seco Tools AB
- 当前专利权人地址： SEX Fagersta
- 优先权： EPX89850230 19890713
- 主分类号： B23B27/14
- IPC分类号： B23B27/14 ; B22F3/24 ; C23C8/20 ; C23C10/48 ; C23C16/30 ; C23C16/40 ; C23C28/04 ; C23C30/00
摘要：
Improved properties of aluminum oxide wear layers on cemented carbides and related substrates can be obtained by combining the two alumina polymorphs (.alpha.-Al.sub.2 O.sub.3 and kappa-Al.sub.2 O.sub.3) as multilayers. The nucleation of .alpha.-Al.sub.2 O.sub.3 and particularly kappa-Al.sub.2 O.sub.3 can be controlled by means of modification layers. According to this invention, it is thus possible to CVD-deposit an oxide multicoating layer consisting of clearly specified layers of .alpha.-Al.sub.2 O.sub.3 and kappa-Al.sub.2 O.sub.3. Preferably, .alpha.-Al.sub.2 O.sub.3 is deposited first by CVD on a TiC coated cemented carbide substrate followed by the said coating layer of kappa-Al.sub.2 O.sub.3.
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