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公开(公告)号：US4268582A
公开(公告)日：1981-05-19
申请号：US16902
申请日：1979-03-02
申请人： Thomas E. Hale , Roy C. Lueth
发明人： Thomas E. Hale , Roy C. Lueth
CPC分类号： C23C16/38 , B23B27/148 , C23C30/005 , Y10S428/911 , Y10S428/932 , Y10S428/938 , Y10T428/12056 , Y10T428/12576
摘要： A coated cemented carbide article comprises a cemented carbide substrate, the surface regions thereof having diffused therein an element such as boron, silicon or aluminum. The article further comprises a coating disposed on the diffused substrate, the coating being a boride such as titanium boride, hafnium boride, zirconium boride or tantalum boride. In another embodiment the coated cemented article further includes an interlayer sandwiched between the diffused substrate and the boride coating, the interlayer being one or more layers formed from the carbides, nitrides or carbonitrides of elements from groups IVb and Vb of the Periodic Table of Elements, and combinations thereof.
摘要翻译： 涂覆的硬质合金制品包括硬质合金基体，其表面区域在其中扩散了诸如硼，硅或铝的元素。 该制品还包括设置在扩散基底上的涂层，该涂层是硼化物，例如硼化钛，硼化铪，硼化锆或硼化硼。 在另一个实施方案中，涂覆的胶结制品还包括夹在扩散基底和硼化物涂层之间的夹层，所述中间层是由元素周期表IVb和Vb族元素的碳化物，氮化物或碳氮化物形成的一个或多个层， 及其组合。
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公开(公告)号：US4579713A
公开(公告)日：1986-04-01
申请号：US727408
申请日：1985-04-25
申请人： Roy C. Lueth
发明人： Roy C. Lueth
CPC分类号： C22F1/02 , B22F3/1007 , C22C1/051
摘要： The present invention provides a method for controlling the carbon content of dewaxed carbide preforms in a carbon containing furnace. The method includes the steps of placing the preforms in a carbon containing furnace and then heating the furnace to a predetermined temperature range between 800 and 1100 degrees Centigrade. At that temperature, a mixture of methane and hydrogen is introduced into the furnace chamber such that the amount of methane is between 10 and 90 percent of the amount of methane present at equilibrium for the reaction C.sub.solid +2H.sub.2 .revreaction.CH.sub.4. The furnace chamber is maintained at its temperature for a first time period sufficient for the chemical reaction XC+2H2.revreaction.X+CH.sub.4 (where X is selected from the group of W, Ti, Ta, Hf and No) substantially reaches equilibrium but shorter than the a second time period in which the reaction C.sub.solid +2H2.revreaction.CH.sub.4 reaches equilibrium or the resident time of the gaseous mixture is less than the second time period.
摘要翻译： 本发明提供了一种控制含碳炉中脱蜡碳化物预制件的碳含量的方法。 该方法包括以下步骤：将预制件放置在含碳炉中，然后将炉子加热至800至1100摄氏度的预定温度范围。 在该温度下，将甲烷和氢气的混合物引入炉室，使得甲烷的存在量在反应Csolid + 2H 2 - > < - CH 4的平衡时存在的甲烷的10至90％。 炉室在第一时间内保持足够的化学反应XC + 2H2 - > < - X + CH4（其中X选自W，Ti，Ta，Hf和No组）基本达到平衡 但短于反应Csolid + 2H 2 - > < - CH 4达到平衡的第二时间段或气体混合物的停留时间小于第二时间段。
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公开(公告)号：US4398702A
公开(公告)日：1983-08-16
申请号：US360337
申请日：1982-03-22
申请人： Roy C. Lueth
发明人： Roy C. Lueth
CPC分类号： F27D1/1621 , B22F3/15 , F27D11/02
摘要： A metallurgical furnace is disclosed which carries out the several steps involved in the liquid phase sintering of preforms of powdered metals, ceramics, and/or combinations of these materials. The metallurgical furnace comprises a pressure vessel defining an interior pressure chamber and a main furnace which is contained within the pressure chamber and spaced inwardly from the walls of the pressure vessel. The main furnace comprises a bottom wall, side walls, top wall and end walls which together form a substantially closed furnace chamber. Each of these furnace walls comprises at least one layer of insulation and, in addition, the top, sides, and end walls further include a vapor barrier which minimizes convection within the furnace chamber. The metallurgical furnace according to the present invention is capable of performing the presinter, sinter and hot isostatic pressing of preforms within the furnace chamber.
摘要翻译： 公开了一种冶金炉，其实施涉及粉末状金属，陶瓷和/或这些材料的组合的预成型件的液相烧结中涉及的几个步骤。 冶金炉包括压力容器，其限定内部压力室和主炉，其包含在压力室内并与压力容器的壁间隔开。 主炉包括底壁，侧壁，顶壁和端壁，它们一起形成基本上封闭的炉室。 这些炉壁中的每一个包括至少一层绝缘层，此外，顶部，侧面和端壁还包括使炉室内的对流最小化的蒸气阻挡层。 根据本发明的冶金炉能够对炉室内的预制件进行预先烧结，烧结和热等静压。
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公开(公告)号：US4591481A
公开(公告)日：1986-05-27
申请号：US690935
申请日：1985-01-14
申请人： Roy C. Lueth
发明人： Roy C. Lueth
CPC分类号： B22F3/15 , B22F3/16 , B22F2999/00
摘要： The present invention discloses a method for densifying previously sintered parts constructed of powdered metals, ceramics or the like to nearly 100% theoretical density. The method of the present invention comprises heating the parts containing binder and hard phase above their liquid phase temperature and then applying a pressure in a predetermined range to the parts for a predetermined period of time and simultaneously maintaining the parts at or above their liquid phase temperature. This pressure range is set so that the pressure is below the pressure necessary to overcome the capillary force acting on the binder to keep the binder from entering the voids but above the pressure necessary to physically move or collapse the microstructure inwardly, thus filling the voids with a homogenous mixture of binder and hard phase. The method of the present invention achieves complete closure of even large voids and the elimination of substantially all porosity within the part.
摘要翻译： 本发明公开了一种将由粉末状金属，陶瓷等构成的先前烧结部件致密化为近100％的理论密度的方法。 本发明的方法包括将含有粘结剂和硬相的部分加热到其液相温度以上，然后将预定范围的压力施加到部件上一段预定的时间，同时保持部件处于或高于其液相温度 。 该压力范围设定为使得压力低于克服作用在粘合剂上的毛细管力所需的压力，以保持粘合剂不进入空隙，但高于物理地移动或塌缩微结构向内的压力，从而填充空隙， 粘合剂和硬相的均匀混合物。 本发明的方法实现了甚至大的空隙的完全封闭和零件中基本上所有的孔隙度的消除。
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公开(公告)号：US4575449A
公开(公告)日：1986-03-11
申请号：US535278
申请日：1983-09-23
申请人： Roy C. Lueth
发明人： Roy C. Lueth
CPC分类号： B22F3/16 , B22F3/15 , B22F2999/00
摘要： The present invention discloses a method for densifying previously sintered parts constructed of powdered metals, ceramics or the like to nearly 100% theoretical density. The method of the present invention comprises heating the parts containing binder and hard phase above their liquid phase temperature and then applying a pressure in a predetermined range to the parts for a predetermined period of time and simultaneously maintaining the parts at or above their liquid phase temperature. This pressure range is set so that the pressure is below the pressure necessary to overcome the capillary force acting on the binder to keep the binder from entering the voids but above the pressure necessary to physically move or collapse themicrostructure inwardly, thus filling the voids with a homogeneous mixture of binder and hard phase. The method of the present invention achieves complete closure of even large voids and the elimination of substantially all porosity within the part.
摘要翻译： 本发明公开了一种将由粉末状金属，陶瓷等构成的先前烧结部件致密化为近100％的理论密度的方法。 本发明的方法包括将含有粘结剂和硬相的部分加热到其液相温度以上，然后将预定范围的压力施加到部件上一段预定的时间，同时保持部件处于或高于其液相温度 。 该压力范围设定为使得压力低于克服作用在粘合剂上的毛细管力所需的压力，以保持粘合剂不进入空隙，但高于物理地向内移动或折叠微结构所需的压力，从而用空气填充空隙 粘合剂和硬相的均匀混合物。 本发明的方法实现了甚至大的空隙的完全封闭和零件中基本上所有的孔隙度的消除。
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公开(公告)号：US4554441A
公开(公告)日：1985-11-19
申请号：US703182
申请日：1985-02-19
申请人： Roy C. Lueth
发明人： Roy C. Lueth
IPC分类号： F27B9/24 , C21D1/00 , C21D1/06 , C21D9/00 , F27B9/30 , F27D3/00 , F27D3/02 , F27D11/02 , F27D99/00 , H05B3/10
CPC分类号： C21D9/0006 , C21D9/0018 , F27D11/02 , F27D3/0024 , F27D3/026 , F27D2003/0002 , F27D2099/0008 , F27D3/028 , F27D99/007
摘要： A delivery system is provided for use in conjunction with the metalurgical furnace of the type having an elongated furnace chamber with an access door at one end for delivering a coffin containing parts into the interior of the furnace chamber. The delivery system comprises a plurality of rollers which are secured to the bottom of the furnace chamber so that axes of the rollers extend transversely with respect to the axis of the furnace chamber. In use, the rollers frictionally engage the bottom of the coffin and guide the coffin into the furnace chamber. Preferably, the coffin includes upwardly extending channels on its bottom, and which the rollers are positioned.
摘要翻译： 提供了一种与具有细长炉室的金属冶炼炉结合使用的输送系统，其具有一端的进入门，用于将含有棺木的部件输送到炉室的内部。 输送系统包括多个辊，其固定到炉室的底部，使得辊的轴线相对于炉室的轴线横向延伸。 在使用中，辊子摩擦地接合棺材的底部并将棺材引导到炉室中。 优选地，棺材在其底部包括向上延伸的通道，并且辊被定位。
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公开(公告)号：US4512558A
公开(公告)日：1985-04-23
申请号：US567769
申请日：1984-01-03
申请人： Roy C. Lueth
发明人： Roy C. Lueth
IPC分类号： F27B9/24 , C21D1/00 , C21D1/06 , C21D9/00 , F27B9/30 , F27D3/00 , F27D3/02 , F27D11/02 , F27D99/00
CPC分类号： C21D9/0006 , C21D9/0018 , F27D11/02 , F27D3/0024 , F27D3/026 , F27D2003/0002 , F27D2099/0008 , F27D3/028 , F27D99/007
摘要： A delivery system is provided for use in conjunction with the metallurgical furnace of the type having an elongated furnace chamber with an access door at one end for delivering a coffin containing parts into the interior of the furnace chamber. The delivery system comprises a plurality of rollers which are secured to the bottom of the furnace chamber so that axes of the rollers extend transversely with respect to the axis of the furnace chamber. In use, the rollers frictionally engage the bottom of the coffin and guide the coffin into the furnace chamber. Preferably, the coffin includes upwardly extending channels on its bottom, and which the rollers are positioned.
摘要翻译： 提供了一种与具有细长炉室的冶金炉结合使用的输送系统，其具有一端的进入门，用于将含有棺木的部件输送到炉室的内部。 输送系统包括多个辊，其固定到炉室的底部，使得辊的轴线相对于炉室的轴线横向延伸。 在使用中，辊子摩擦地接合棺材的底部并将棺材引导到炉室中。 优选地，棺材在其底部包括向上延伸的通道，并且辊被定位。
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公开(公告)号：US4431605A
公开(公告)日：1984-02-14
申请号：US375681
申请日：1982-05-06
申请人： Roy C. Lueth
发明人： Roy C. Lueth
CPC分类号： B22F3/16 , B22F3/15 , B22F2999/00
摘要： The present invention discloses a method for densifying previously sintered parts constructed of powdered metals, ceramics or the like to nearly 100% theoretical density. The method of the present invention comprises heating the parts above their liquid phase temperature and then applying a pressure in the range of 50-2,000 psi to the parts for a predetermined period of time and simultaneously maintaining the parts at or above their liquid phase temperature. The method of the present invention achieves complete closure of even large voids and the elimination of substantially all porosity within the part.
摘要翻译： 本发明公开了一种将由粉末状金属，陶瓷等构成的先前烧结部件致密化为近100％的理论密度的方法。 本发明的方法包括将部件加热到其液相温度之上，然后在50-2,000psi的范围内对该部件施加一段预定时间的压力，并同时保持部件处于或高于其液相温度。 本发明的方法实现了甚至大的空隙的完全封闭和零件中基本上所有的孔隙度的消除。
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