公开(公告)号：US4778521A

公开(公告)日：1988-10-18

申请号：US869716

申请日：1986-06-02

申请人： Yusuke Iyori ,  Hisaaki Ida

发明人： Yusuke Iyori ,  Hisaaki Ida

IPC分类号： B23B27/14 ,  C22C29/00 ,  C22C29/02 ,  C22C29/04 ,  C22C29/06 ,  C22C29/08 ,  C22C29/10

CPC分类号： C22C29/02 ,  C22C29/04 ,  C22C29/10 ,  B22F2998/00

摘要： A tough cermet made from 20-92 weight % of TiC and/or TiCN, 5-50 weight % of WC and 3-30 weight % of an iron-group metal. This tough cermet has a three phase grain microstructure consisting of a core phase rich in TiC and/or TiCN, an intermediate phase rich in WC and surrounding the core phase, and an outer phase made of (Ti,W)C and/or (Ti,W)CN and surrounding the intermediate phase. Because of this three-phase microstructure, the cermet has high toughness without sacrificing hardness. It is prepared by using WC powder of as fine as less than 3 .mu.m, without taking the course of forming a solid solution of TiC and/or TiCN and WC and pulverizing it.

摘要翻译： 由20-92重量％的TiC和/或TiCN，5-50重量％的WC和3-30重量％的铁族金属制成的硬质金属陶瓷。 这种硬质金属陶瓷具有由富含TiC和/或TiCN的核相，富含WC并且包围核相的中间相以及由（Ti，W）C和/或（ Ti，W）CN并围绕中间相。 由于这种三相显微组织，金属陶瓷具有高韧性而不牺牲硬度。 通过使用细小至3μm的WC粉末制备，而不用形成TiC和/或TiCN和WC的固溶体并粉碎。

公开(公告)号：US4904445A

公开(公告)日：1990-02-27

申请号：US172237

申请日：1988-03-23

申请人： Yusuke Iyori ,  Hisaaki Ida

发明人： Yusuke Iyori ,  Hisaaki Ida

IPC分类号： B23B27/14 ,  C22C29/00 ,  C22C29/02 ,  C22C29/04 ,  C22C29/06 ,  C22C29/08 ,  C22C29/10

CPC分类号： C22C29/02 ,  C22C29/04 ,  C22C29/10 ,  B22F2998/00

摘要： A tough cermet made from 20-92 weight % of TiC and/or TiCN, 5-50 weight % of WC and 3-30 weight % of an iron-gorup metal. This tough cermet has a three phase grain microstructure and is made is mixing titanium carbonitride powder and up to 70 weight % of the total amount of the tungsten carbide fine powder. The resulting mixture is melted to form a solid solution, pulverized, mixed with the remaining amount of tungsten carbide fine powder, and sintered at temperatures of 1325.degree.-1650.degree. C.

公开(公告)号：US4957548A

公开(公告)日：1990-09-18

申请号：US222780

申请日：1988-07-22

申请人： Nobuhiko Shima ,  Hisaaki Ida ,  Yusuke Iyori

发明人： Nobuhiko Shima ,  Hisaaki Ida ,  Yusuke Iyori

IPC分类号： B23B27/14 ,  C22C29/02 ,  C22C29/04

CPC分类号： C22C29/04 ,  B22F2998/00

摘要： This invention provides a cermet alloy improved in toughness high-temperature strength and chipping resistance. This cermet alloy consists essentially of 50-95% by weight of a hard phase of a composite carbo-nitride of at least both of W and Ti and, optionally, one or more elements selected from the group consisting of Groups 4a, 5a and 6a elements of the periodic table, the balance being a binding phase, of an Fe family element or elements and inevitable impurities, said composite carbo-nitride has a rim-and-core structure which comprises a core portion of a composite carbo-nitride poor in Ti and nitrogen, surrounded thereon by a rim portion of a composite carbo-nitride rich in Ti and nitrogen. It is preferred that the hard phase consists of 50% by volume or less of TiN or TiCN particles having N.gtoreq.C and forming no rim-and-core structure and the composite carbo-nitride having the rim-and-core structure.

公开(公告)号：US5149595A

公开(公告)日：1992-09-22

申请号：US757752

申请日：1991-09-11

申请人： Katsuhiko Kojo ,  Akibumi Negishi ,  Hisaaki Ida

发明人： Katsuhiko Kojo ,  Akibumi Negishi ,  Hisaaki Ida

IPC分类号： C22C1/05 ,  B23B27/14 ,  C22C29/00 ,  C22C29/02 ,  C22C29/04 ,  C22C29/08 ,  C22C29/10 ,  C22C29/14 ,  C22C29/16

CPC分类号： C22C29/10 ,  C22C29/02 ,  C22C29/08 ,  C22C29/14 ,  Y10T428/12056 ,  Y10T428/30

摘要： A cermet alloy having a structure comprising a hard phase and a bonding phase, said hard phase comprising (1) at least one of MC, MN and MCN, wherein M is at least one element selected from Ti, Zr, Hf, Th, V, Nb, Ta, Pa, Cr, Mo, U and W and (2) at least one W-Co-B compound; said bonding phase comprising Co. The cermet has superior toughness and hardness, and can be worked by conventional sintering methods. The invention also includes a method for producing the cermet.