发明名称 |
Cemented carbide insert for toughness demanding short hole drilling operations |
摘要 |
The present invention relates to a coated cutting insert with excellent toughness properties particularly useful for toughness demanding short hole drilling in low alloy and stainless steels and a method of making the same. The inserts comprise a substrate and a coating. The substrate comprises WC, from about 8 to about 11 wt-% Co and from about 0.2 to about 0.5 wt-% Cr with an average WC-grain size of from about 0.5 to about 1.5 mum and a CW-ratio of from about 0.80 to about 0.90. The coating comprises a laminar, multilayered structure of TiN+Ti<SUB>1-x</SUB>Al<SUB>x</SUB>N+TiN+Ti<SUB>1-x</SUB>Al<SUB>x</SUB>N+TiN . . . in polycrystalline, non-repetitive form, with x being from about 0.4 to about 0.6 with a thickness of the individual TiN-or Ti<SUB>1-x</SUB>Al<SUB>x</SUB>N-layers of from about 1 to about 30 nm varying essentially at random and with a total thickness of the multilayered coating of from about 1 to about 5 mum. The layers are deposited using arc evaporation technique.
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申请公布号 |
US2006286410(A1) |
申请公布日期 |
2006.12.21 |
申请号 |
US20060343202 |
申请日期 |
2006.01.31 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY AB |
发明人 |
AHLGREN MATS;KJELLGREN JAN;AGREN TORBJORN |
分类号 |
B32B9/00;B05D3/00;C23C8/00 |
主分类号 |
B32B9/00 |
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