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1. 发明专利

JP2005042201A Method for producing fine grained tungsten carbide-cobalt cemented carbide 审中-公开
标题翻译：生产精细粒状碳化钨 - 碳酸钙的方法
公开(公告)号：JP2005042201A
公开(公告)日：2005-02-17
申请号：JP2004217547
申请日：2004-07-26
申请人： Sandvik Ab , サンドビックアクティエボラーグSandvik Actiebolag
发明人： GUSTAFSON PER , NORGREN SUSANNE , WALDENSTROEM MATS
IPC分类号： B23B27/14 , B22F3/10 , C22C1/05 , C22C29/08
CPC分类号： C22C1/051 , B22F2005/001 , B22F2998/10 , B22F2999/00 , C22C29/08 , B22F9/04 , B22F3/1007 , B22F2201/02
摘要： PROBLEM TO BE SOLVED: To provide a method for obtaining a fine grained cemented carbide structure by performing sintering at least partly in a nitrogen-containing atmosphere.
SOLUTION: There is provided a method of making a fine grained tungsten carbide-cobalt cemented carbide comprising mixing, milling, and press-forming according to the conventional powder metallurgical method, and successively, the nitrogen is introduced into the sintering atmosphere at the pressure of ≥0.5 atm during applying the sintering treatment after dewaxing but before pore closure. In this way, a grain refinement including reduced grain size and less abnormal grain can be obtained.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种通过至少部分地在含氮气氛中进行烧结来获得细粒硬质合金结构的方法。解决方案：提供根据常规粉末冶金方法制备细晶碳化钨 - 钴硬质合金的方法，其包括混合，研磨和压制成型，然后将氮气引入烧结气氛中在脱蜡后但在孔封闭之前进行烧结处理时，压力≥0.5atm。这样可以获得包括晶粒尺寸减小和晶粒细小的晶粒细化。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

CA2130544C CEMENTED CARBIDE WITH BINDER PHASE ENRICHED SURFACE ZONE 未知
公开(公告)号：CA2130544C
公开(公告)日：2005-04-26
申请号：CA2130544
申请日：1993-02-19
申请人： SANDVIK AB
发明人： OSTLUND AKE , OSCARSSON ULF , GUSTAFSON PER , AKESSON LEIF
IPC分类号： C22C29/02 , B22F7/02 , C22C1/05 , C22C29/08 , C23C14/02 , C23C26/00
摘要： The present invention relates to a cemented carbide insert with improved toughness and resistance against plastic deformation containing WC and cubic phases of carbide and/or carbonitride in a binder phase based on Co and/or Ni with a binder phase enriched surface zone. The binder phase content in the insert is 3.5-1 2 weight-%. In a zone below the binder phase enriched surface zone the binder phase content is 0.85-1 of the content in the inner portion of the insert and the content of cubic phases essentially constant and equal to the content in the inner portion of the insert.

3. 发明专利

SE514283C2 未知
公开(公告)号：SE514283C2
公开(公告)日：2001-02-05
申请号：SE9501383
申请日：1995-04-12
申请人： SANDVIK AB
发明人： GUSTAFSON PER , AAKESSON LEIF
IPC分类号： B23P15/28 , C22C29/02 , B23B27/14 , C23C30/00
摘要： The present invention relates to a cemented carbide insert, comprising a cemented carbide substrate and a coating. The substrate contains WC and cubic carbonitride phase in a binder phase based on Co and/or Ni and has a binder phase enriched surface zone essentially free of cubic phase. The binder phase enriched surface zone prevails over the edge. As a result, an insert according to the invention has improved edge toughness and resistance against plastic deformation and is particularly useful for machining of sticky work piece materials such as stainless steel.

4. 发明专利

AT189707T 未知
公开(公告)号：AT189707T
公开(公告)日：2000-02-15
申请号：AT93850229
申请日：1993-12-08
申请人： SANDVIK AB
发明人： GUSTAFSON PER , AKESSON LEIF , OESTLUND AKE
IPC分类号： C22C29/02 , B22F3/00 , C22C1/05 , C22C29/08
摘要： The present invention relates to a new process for binder phase enrichment. The process combines binder phase enrichment by dissolution of cubic phase with the requirements that cause formation of stratified layers, resulting in a unique structure. The new structure is characterised by, in comparison with the ones previously known, deeper stratified layers and less maximum binder phase enrichment. The possibility of combining dissolution of the cubic phase with formation of stratified layers offers new possibilities to optimize the properties of tungsten carbide based cemented carbides for cutting tools. The new process offers possibilities to combine the two types of gradients. The dissolution of cubic phase moves the zone with maximum amount of stratified binder phase from the surface to a zone close to and below the dissolution front. By controlling the depth of dissolution, the interstitial balance and the cooling rate a cemented carbide with a unique combination of toughness and plastic deformation resistance can be achieved.

5. 发明专利

SE505425C2 未知
公开(公告)号：SE505425C2
公开(公告)日：1997-08-25
申请号：SE9203851
申请日：1992-12-18
申请人： SANDVIK AB
发明人： GUSTAFSON PER , AAKESSON LEIF , OESTLUND AAKE
IPC分类号： B22F3/00 , C22C29/02 , C22C1/05 , C22C29/08
摘要： The present invention relates to a new process for binder phase enrichment. The process combines binder phase enrichment by dissolution of cubic phase with the requirements that cause formation of stratified layers, resulting in a unique structure. The new structure is characterised by, in comparison with the ones previously known, deeper stratified layers and less maximum binder phase enrichment. The possibility of combining dissolution of the cubic phase with formation of stratified layers offers new possibilities to optimize the properties of tungsten carbide based cemented carbides for cutting tools. The new process offers possibilities to combine the two types of gradients. The dissolution of cubic phase moves the zone with maximum amount of stratified binder phase from the surface to a zone close to and below the dissolution front. By controlling the depth of dissolution, the interstitial balance and the cooling rate a cemented carbide with a unique combination of toughness and plastic deformation resistance can be achieved.

6. 发明专利

SE9601567D0 未知
公开(公告)号：SE9601567D0
公开(公告)日：1996-04-23
申请号：SE9601567
申请日：1996-04-23
申请人： SANDVIK AB
发明人： OSCARSSON ULF , GUSTAFSON PER , CHATFIELD CHRIS , LAGERQUIST MIKAEL
IPC分类号： C04B41/87 , B22F3/10 , C04B41/50 , C04B41/52 , C04B41/89 , C22C29/02 , C22C29/12 , F27B21/00 , F27D5/00 , C22C

7. 发明专利

PL302903A1 SINTERED CARBIDE CUTTING TIP AND METHOD OF MAKING SAME 未知
公开(公告)号：PL302903A1
公开(公告)日：1995-10-16
申请号：PL30290394
申请日：1994-04-06
申请人： SANDVIK AB
发明人： GUSTAFSON PER , AKESSON LEIF , OESTLUND AAKE
IPC分类号： B23P15/30 , C21D9/22

8. 发明专利

DE69203652D1 未知
公开(公告)号：DE69203652D1
公开(公告)日：1995-08-31
申请号：DE69203652
申请日：1992-05-22
申请人： SANDVIK AB
发明人： WEINL GEROLD , OSKARSSON ROLF , GUSTAFSON PER
IPC分类号： C04B35/56 , B22F3/10 , B23B27/14 , C04B35/638 , C04B35/64 , C22C1/05 , C22C29/02 , C22C29/04 , C22C29/16

9. 发明专利

SE500047C2 未知
公开(公告)号：SE500047C2
公开(公告)日：1994-03-28
申请号：SE9101591
申请日：1991-05-24
申请人： SANDVIK AB
发明人： WEINL GEROLD , OSKARSSON ROLF , GUSTAFSON PER
IPC分类号： C04B35/56 , B22F3/10 , B23B27/14 , C04B35/638 , C04B35/64 , C22C1/05 , C22C29/02 , C22C29/04 , C22C29/16

10. 发明专利

CA2130544A1 CEMENTED CARBIDE WITH BINDER PHASE ENRICHED SURFACE ZONE 未知
公开(公告)号：CA2130544A1
公开(公告)日：1993-09-02
申请号：CA2130544
申请日：1993-02-19
申请人： SANDVIK AB
发明人： STLUND KE , OSCARSSON ULF , GUSTAFSON PER , KESSON LEIF
IPC分类号： C22C29/02 , B22F7/02 , C22C1/05 , C22C29/08 , C23C14/02 , C23C26/00
摘要： 2130544 9317140 PCTABS00025 The present invention relates to a cemented carbide insert with improved toughness and resistance against plastic deformation containing WC and cubic phases of carbide and/or carbonitride in a binder phase based on Co and/or Ni with a binder phase enriched surface zone. The binder phase content in the insert is 3.5-12 weight-%. In a zone below the binder phase enriched surface zone the binder phase content is 0.85-1 of the content in the inner portion of the insert and the content of cubic phases essentially constant and equal to the content in the inner portion of the insert.

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