公开(公告)号：WO1991016468A1

公开(公告)日：1991-10-31

申请号：PCT/US1991000584

申请日：1991-01-28

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  MATERKOWSKI, James, P.

IPC: C22C38/44

CPC classification number: C22C38/44 ,  C22C38/58 ,  Y10T428/12486

Abstract: An air hardened steel having a reduced nickel content and acceptable impact hardness. The air hardened steel may include 0.18-0.35 w/o carbon, 1.3-1.75 w/o silicon, 1.3-2.0 w/o manganese, 0.65-2.1 w/o chromium, 0.9-2.0 w/o nickel and 0.2-0.35 w/o molybdenum and the balance impurities, deoxidants, and iron.

公开(公告)号：WO1989001925A1

公开(公告)日：1989-03-09

申请号：PCT/US1988002696

申请日：1988-08-08

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  MEHROTRA, Pankaj, Kumar ,  BILLMAN, Elizabeth, R.

IPC: C04B41/87

CPC classification number: C04B41/009 ,  B23B27/148 ,  B23B2228/61 ,  C04B35/111 ,  C04B35/803 ,  C04B41/5031 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89 ,  C04B41/5068 ,  C04B35/10 ,  C04B35/80

Abstract: An article of manufacture is provided having a SiC whisker reinforced alumina matrix substrate which has an alumina coating bonded to its exterior surface. It has been found that these articles are useful as cutting inserts in the high speed rough machining of steels.

公开(公告)号：WO1989001920A1

公开(公告)日：1989-03-09

申请号：PCT/US1988002690

申请日：1988-08-08

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  MEHROTRA, Pankaj, Kumar ,  SWIOKLA, Joyce, L. ,  BILLMAN, Elizabeth, R.

IPC: C04B35/10

CPC classification number: C04B41/009 ,  B23B27/148 ,  B23B2228/61 ,  C04B35/6455 ,  C04B35/80 ,  C04B41/5062 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89 ,  C04B41/455 ,  C04B41/4578 ,  C04B41/53 ,  C04B41/5031 ,  C04B35/645

Abstract: A method of manufacturing a shaped ceramic article by hot isostatic pressing comprising the following steps: (a) forming a compact of sinterable ceramic compositions, (b) applying a coating to the compact by vapor deposition of a ceramic composition that does not become vitreous before or during the subsequent isostatic pressing step, and (c) heating and isostatically pressing the coated compacts in an atmosphere that reacts with the coating and/or the compact at pressing temperatures and pressures to cause the compact to approach theoretical density. The method is suitable for forming a fired ceramic compact having a whisker loading in excess of about 12.5 volume percent with substantially isotropic properties due to a substantially random orientation of the whiskers.

公开(公告)号：WO1989001836A1

公开(公告)日：1989-03-09

申请号：PCT/US1988002531

申请日：1988-07-26

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  NIEBAUER, Kenneth, L. ,  LOCKARD, Thomas, A.

IPC: B23B27/22

CPC classification number: B23B27/045 ,  Y10T407/2268 ,  Y10T407/2272 ,  Y10T407/235 ,  Y10T407/24 ,  Y10T407/25

Abstract: An improved cutting insert (10) with chip control features and a method for manufacturing the same. An insert body (12) having wall regions (14, 16), sides (18, 20) and top and bottom walls (22, 24) is adapted for mounting in a pocket (74) in a holder (70). The insert body (12) has cutting edges (26, 28) and a diagonal notch (30, 32) in the top and bottom sides (22, 24). A land region (34, 36) extends rearwardly from the end wall (14, 16) region toward the respective top or bottom wall (22, 24) and defines a surface region of a predetermined width. A descending wall (40) initiates in a portion of the land (34, 36) and terminates in a planar floor region (44) having a forward (52), a rearward (54) and opposed side edges (56, 58). A back ramp (60) extends upwardly from the planar floor rearward edge (54) and terminates at the respective top or bottom wall (22, 24).

公开(公告)号：WO1989001561A1

公开(公告)日：1989-02-23

申请号：PCT/US1988002604

申请日：1988-07-29

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  WHYSONG, Hubert, H.

IPC: E21B10/52

CPC classification number: E21C35/183 ,  B23K31/025 ,  B23K35/0222 ,  E21B10/56 ,  E21C2035/1806 ,  E21C2035/1816

Abstract: Formation of a continuous double sandwich braze joint (12) between a bit body (18) of a conical bit (10) and a carbide insert tip (20) disposed in a cylindrical recess (22) formed in a forward end (24) of the bit body (18) is facilitated by a cylindrical shim (14). In one form, the shim is a cylindrical sleeve having an annular sidewall (32) with opposite forward (34) and rearward (36) open ends. The insert tip (20) is received through the forward open end (34) of the sleeve (32). Also, a multiplicity of perforations (16) are defined in spaced apart relation through the sidewall (32) and uniformly distributed thereabout. The multiperforated sleeve is disposed within the bit body recess (22) and between its interior and the exterior of a cylindrical base (30) of the insert tip (22) such that the multiplicity of perforations (16) defined in the sleeve sidewall (32) provide a multiplicity of spaces extending between the bit body (18) and insert tip (22) for receiving braze therethrough. In an alternative form, the shim (14') is a cylindrical basket having a sidewall (32') and endwall (40). The sidewall (32') is open at its forward end (34') and closed at its rearward end (42) by the endwall (40). The basket also has a multiplicity of perforations (16') defined through and distributed uniformly about its sidewall (32') and endwall (40). The endwall (40) is frusto-conical shaped and protrudes away from the sidewall rearward end (42).

公开(公告)号：WO1989001086A1

公开(公告)日：1989-02-09

申请号：PCT/US1988002268

申请日：1988-07-06

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  ISAKOV, Edmund

IPC: E21B10/42

CPC classification number: E21B10/54

Abstract: A drill (11) for forming holes in masonry includes a supporting body (13) having an axis of rotation (15) therethrough and a pair of inserts (17, 19) mounted at one end (2) thereof by mounting portions (23, 25). Each insert has a main cutting edge (27), and external cutting edge (33), an upper internal cutting edge (29) and a lower internal cutting edge (31). The upper and lower internal cutting edges define a center relief (35) having an upper conical shaped portion (37) with an angle of relief between about 60 to 90 degrees and a lower cylindrical shaped portion (39). There is a ratio of between about 5 to 8 between the diameter of the drill and the diameter of the lower cylindrical shaped portion. There is a ratio of between about 2 to 2.5 between the diameter of the drill and the largest diameter of the conical shaped portion.

Abstract translation: 用于在砖石中形成孔的钻头（11）包括具有穿过其中的旋转轴线（15）的支撑体（13）和通过安装部分（23,23）安装在其一端（2）处的一对插入件（17,19） 25）。 每个插入件具有主切削刃（27）和外部切削刃（33），上部内部切削刃（29）和下部内部切削刃（31）。 上部和下部内部切割边缘限定具有中间凸起（35），该中心凸起具有上部圆锥形部分（37），其具有大约60度至90度之间的释放角度和下部圆柱形部分（39）。 在钻头的直径和下圆柱形部分的直径之间存在约5至8之间的比率。 在钻头的直径和锥形部分的最大直径之间存在约2至2.5之间的比率。

公开(公告)号：WO1988009315A1

公开(公告)日：1988-12-01

申请号：PCT/US1988000994

申请日：1988-03-25

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  MEHROTRA, Pankaj, Kumar ,  SWIOKLA, Joyce, L.

IPC: C04B35/58

CPC classification number: C04B41/009 ,  C04B35/597 ,  C04B41/5067 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89 ,  C23C16/308 ,  C04B41/0072 ,  C04B41/5025 ,  C04B35/58042

Abstract: A sialon ceramic material comprising a ceramic core selected from alpha-prime-sialon, beta-prime-sialon, and an intergranular phase and, optionally, substantially inert refractory phases. The sialon ceramic material has an alloyed surface layer with a substantially increased aluminum and oxygen content.

Abstract translation: 一种赛隆陶瓷材料，其包含选自α-仲赛隆，β-赛赛尔 - 赛隆和晶间相的陶瓷芯，以及任选地基本上惰性的耐火相。 赛隆陶瓷材料具有基本上增加的铝和氧含量的合金表面层。

公开(公告)号：WO1988004649A1

公开(公告)日：1988-06-30

申请号：PCT/US1987003096

申请日：1987-11-20

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  TERRY, Charles, James ,  FRANK, Jack, D.

IPC: C04B35/56

CPC classification number: C01B32/949 ,  C01P2006/80

Abstract: In the alumino-thermit method of producing tungsten monocarbide powders, metallic iron is added to the reaction charge in quantities to control the calculated reaction temperature within the range of about 4372 DEG to about 4500 DEG F. It has been found that this process can now be controlled to produce macrocrystalline tungsten carbide powders which are very low in Ti, Ta and Nb content and have a very narrow range of total carbon contents.

公开(公告)号：WO1998013528A1

公开(公告)日：1998-04-02

申请号：PCT/US1997012691

申请日：1997-07-18

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  GRAB, George, P.

IPC: C22C29/00

CPC classification number: B22F7/08 ,  B22F2005/001 ,  C23C30/005 ,  Y10T407/27 ,  Y10T428/12021 ,  Y10T428/12028

Abstract: A cutting insert that has a flank face and a rake face and a cutting edge at the juncture thereof. The substrate presents a bulk region that contains a metallic binder, as well as one or more of Group IVB, Group VB and Group VIB metal carbides and/or carbonitrides. The substrate further includes a flank surface region near the flank face of the substrate that has a solid solution metal carbide and/or carbonitride content greater than that of the bulk region. The substrate includes a rake surface region near the rake face of the substrate with a solid solution metal carbide content that is less than that of the flank surface region.

Abstract translation: 切削刀片，其在其接合处具有侧面和前刀面以及切削刃。 衬底呈现包含金属粘合剂，以及IVB族，VB族和VIB族金属碳化物和/或碳氮化物中的一种或多种的体积区域。 基板还包括靠近基板的侧面的侧面表面区域，其具有比块体区域更大的固溶体金属碳化物和/或碳氮化物含量。 衬底包括靠近衬底的前刀面的前刀面表面区域，该固定溶液的金属碳化物含量小于侧面区域的固溶体金属碳化物含量。

公开(公告)号：WO1997038150A1

公开(公告)日：1997-10-16

申请号：PCT/US1997000715

申请日：1997-01-15

Applicant: KENNAMETAL INC.

Inventor： KENNAMETAL INC. ,  INSPEKTOR, Aharon

IPC: C23C28/00

CPC classification number: C23C28/321 ,  C23C28/00 ,  C23C28/04 ,  C23C28/325 ,  C23C28/34 ,  C23C28/36 ,  C23C30/005 ,  Y10T407/27 ,  Y10T428/24942

Abstract: A coating scheme comprising a boron and nitrogen containing layer that satisfactorily adheres to a substrate (2) is disclosed. The satisfactorily adherent coating scheme comprises a base layer (4), a first intermediate layer (6), a second intermediate layer (8) and the boron and nitrogen containing layer (10). The coating scheme is compatible with tooling for drilling, turning, milling, and/or forming hard, difficult to cut materials. The coating scheme has been applied to cutting inserts comprised of cermets or ceramics using PVD techniques. The boron and nitrogen layer preferably comprises boron nitride and, more preferably, cubic boron nitride.

Abstract translation: 公开了包含令人满意地粘附到基底（2）的含硼和氮的层的涂布方案。 令人满意的贴附涂层方案包括基层（4），第一中间层（6），第二中间层（8）和含氮和氮的层（10）。 涂层方案与用于钻孔，车削，铣削和/或形成硬，难切削材料的工具相容。 涂层方案已经应用于使用PVD技术的由金属陶瓷或陶瓷组成的切削刀片。 硼和氮层优选包含氮化硼，更优选地包括立方氮化硼。