- 专利标题: METHOD OF MANUFACTURING A CEMENTED CARBIDE MATERIAL
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申请号: EP16813071.4申请日: 2016-12-19
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公开(公告)号: EP3393696A1公开(公告)日: 2018-10-31
- 发明人: KONYASHIN, Igor Yurievich , RIES, Bernd Heinrich , HINNERS, Hauke
- 申请人: Element Six GmbH
- 申请人地址: Städeweg 18 36151 Burghaun DE
- 专利权人: Element Six GmbH
- 当前专利权人: Element Six GmbH
- 当前专利权人地址: Städeweg 18 36151 Burghaun DE
- 代理机构: Rollinson, Gabrielle Mary Joy
- 优先权: GB201522503 20151221
- 国际公布: WO2017108653 20170629
- 主分类号: B22F3/00
- IPC分类号: B22F3/00 ; B22F3/15 ; C22C1/05 ; C22C29/06 ; B33Y70/00
摘要:
Cemented carbide granules suitable for making articles by additive manufacturing comprise carbide grains and a binder comprising any of cobalt, nickel and iron. The granules have a density of at least 99.5 % theoretical and a mean compressive strength of at least 40 MPa. The granules are made by milling cemented carbide powder in an organic fluid with a plasticiser to form a slurry, drying to form a powder, granulating the powder, screening the granules, sintering the screened granules for 2-20 minutes at a temperature in the range 1260-1330 degrees C in a vacuum or protective atmosphere to form an aggregation, breaking the aggregation to form sintered granules and re-screening. The method can further involve one of the following: i) solid-state sintering the granules prior to liquid phase sintering at the temperature in the range 1260-1330 degrees C or ii) forming the granules by pressing the powder into a green body and breaking it up.
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