-
公开(公告)号：US4943403A
公开(公告)日：1990-07-24
申请号：US872398
申请日：1986-06-10
申请人： Tsuneo Miyashita , Hiroaki Nishio , Michitaka Sato
发明人： Tsuneo Miyashita , Hiroaki Nishio , Michitaka Sato
CPC分类号： C04B35/638 , B01D11/0203 , B22F3/1025
摘要： There is disclosed a method for eliminating an organic dispersion medium from a molded product obtained by plasticizing-molding or casting-molding of metallic and/or ceramic powders wherein the elimination is by extraction by liquid carbon dioxide at a temperature not lower than -30.degree. C. and not higher than -31.1.degree. C. The method prevents nonuniform volumetric decrease of the molded product to be otherwise caused by the extraction of the organic dispersion medium, while also making it possible to completely eliminate the organic dispersion medium without causing residual strain or deformation in the molded product.
摘要翻译： 公开了一种通过对金属和/或陶瓷粉末进行增塑成型或浇铸成型而得到的成型体中除去有机分散介质的方法，其中通过在不低于-30℃的温度下用液态二氧化碳进行萃取 C.并且不高于-31.1℃。该方法可防止成型产品的不均匀体积减少，否则由提取有机分散介质引起，同时也可以完全消除有机分散介质而不产生残余应变 或模制产品中的变形。
-
公开(公告)号：US4676949A
公开(公告)日：1987-06-30
申请号：US907980
申请日：1986-09-16
申请人： Tsuneo Miyashita , Hiroaki Nishio
发明人： Tsuneo Miyashita , Hiroaki Nishio
CPC分类号： B22F3/1003 , B22F1/0059 , C22C33/0235 , B22F2003/023
摘要： A tetrafluoroethylene-type fluoroplastic powder is added and mixed with a metal powder and the mixture is shaped. The compact is heated in a nonoxidizing atmosphere and the oxides on the surface of the metal particles are converted and removed as gaseous fluorides. Alternatively, after the oxides are converted to solid or liquid fluorides, the fluorides are reduced by hydrogen and then they are removed as gaseous reaction products. Thereafter, the compact is sintered.
摘要翻译： 加入四氟乙烯型氟塑料粉末并与金属粉末混合，并将混合物成形。 在非氧化气氛中加热压块，并将金属颗粒表面上的氧化物作为气态氟化物转化和除去。 或者，在将氧化物转化为固体或液体氟化物之后，氟化物通过氢气还原，然后作为气态反应产物除去。 之后，将该压块烧结。
-
公开(公告)号：US4719078A
公开(公告)日：1988-01-12
申请号：US907981
申请日：1986-09-16
申请人： Tsuneo Miyashita , Hiroaki Nishio , Michitaka Sato
发明人： Tsuneo Miyashita , Hiroaki Nishio , Michitaka Sato
CPC分类号： B22F3/1266 , C04B35/6455
摘要： A method of sintering compacts of metals, ceramics and the like in powder form. At least the surface portion of the compact is sintered in a plasma atmosphere having a pressure of 10 Torr or less thereby eliminating the open voids and then the compact is subjected to a hot isostatic press process.
摘要翻译： 以粉末形式烧结金属，陶瓷等的压块的方法。 至少在压力为10Torr以下的等离子体气氛中烧结该压块的表面部分，从而消除了开放空隙，然后对该压坯进行热等静压处理。
-
公开(公告)号：US4927600A
公开(公告)日：1990-05-22
申请号：US105985
申请日：1987-10-08
申请人： Tsuneo Miyashita , Hiroaki Nishio , Kazuya Yabuta , Yoshio Takagi
发明人： Tsuneo Miyashita , Hiroaki Nishio , Kazuya Yabuta , Yoshio Takagi
CPC分类号： B22F3/1233 , B22F3/04 , B28B7/342 , Y10S264/78
摘要： The invention is concerned with the method of compression molding a metallic or ceramic powders. The method includes the step of maintaining a negative pressure within a first mold of noncompactable powders for intimately contacting on its inner surface a pouch-like member of thin-walled resilient material for producing a second mold, and the step of compactly charging starting powders into the second mold and exhausting air from and sealing the second mold, taking out a pre-molded body of the metallis or ceramic powders together with the second mold and the step of processing the pre-molded body by a cold or hot isostatic press.
摘要翻译： 本发明涉及压缩成型金属或陶瓷粉末的方法。 该方法包括在不可压缩的粉末的第一模具内保持负压以在其内表面上紧密接触薄壁弹性材料的袋状构件以产生第二模具的步骤，以及将起始粉末紧密地装入 第二模具和排出空气来自第二模具并且密封第二模具，与第二模具一起取出金属或陶瓷粉末的预成型体，以及通过冷或热等静压机加工预成型体的步骤。
-
5.发明授权Method of blast furnace operation utilizing selective recycling of peripheral gas stream 失效利用周边气流选择性再循环的高炉操作方法
公开(公告)号：US3935002A
公开(公告)日：1976-01-27
申请号：US457720
申请日：1974-04-03
申请人： Tsuneo Miyashita , Hiroaki Nishio
发明人： Tsuneo Miyashita , Hiroaki Nishio
IPC分类号： C21B5/06
CPC分类号： C21B5/06 , Y02P10/283
摘要： There is provided a method of blast furnace operation utilizing selective recycling of peripheral gas stream wherein the number of outlet ports for peripheral gas stream and the position of the gas outlet ports relative to the inlet ports for reducing gas are optimalized and the content of nitrogen in the recycling gas and the content of nitrogen in the reducing gas to be injected are controlled within the respective predetermined ranges.
摘要翻译： 提供了利用周边气流的选择性再循环的高炉操作的方法，其中用于外围气体流的出口的数量和气体出口相对于还原气体的入口的位置是最佳化的，并且氮的含量 将再循环气体和待喷射的还原气体中的氮含量控制在各自的预定范围内。
-
6.发明授权
公开(公告)号：US4737332A
公开(公告)日：1988-04-12
申请号：US862961
申请日：1986-05-13
申请人： Tsuneo Miyashita , Yasushi Ueno , Hiroaki Nishio , Shoji Kubodera
发明人： Tsuneo Miyashita , Yasushi Ueno , Hiroaki Nishio , Shoji Kubodera
CPC分类号： C04B35/638 , B22F3/1025
摘要： A method for eliminating a dispersion medium from a molded product obtained by plasticizing-molding or casting-molding one or more of metallic and ceramic powders, wherein the elimination process is carried out in a supercritical liquid carbon dioxide atmosphere without heating to higher temperatures.
摘要翻译： 从通过对一种或多种金属和陶瓷粉末进行塑化成型或流延成型获得的模制品中消除分散介质的方法，其中消除过程在超临界液体二氧化碳气氛中进行而不加热到较高温度。
-
公开(公告)号：US4636342A
公开(公告)日：1987-01-13
申请号：US578858
申请日：1984-02-10
CPC分类号： F27D13/00 , C22B1/2413
摘要： A method and an apparatus for continuously manufacturing non-fired pellets, which comprise: continuously supplying green pellets containing a carbonating binder into a vertical type reactor to continuously pass the green pellets sequentially through a predrying zone, a carbonating zone and a drying zone in the vertical type reactor; blowing a predrying gas having a relative humidity of up to 70% and a temperature of from 40.degree. to 250.degree. C. into the predrying zone to predry the green pellets therein until the water content of the green pellets in the predyring zone falls within the range of from 1 to 7 wt. %; blowing a carbonating gas comprising carbon dioxide gas of from 5 to 95 vol. % and saturated steam of from 5 to 95 vol. % and having a temperature of from 30.degree. to 98.degree. C. into the carbonating zone to carbonate the carbonating binder contained in the green pellets therein; and blowing a drying gas at a temperature of from 100.degree. to 300.degree. C. into the drying zone to harden the green pellets therein, thereby continuously manufacturing non-fired pellets.
摘要翻译： 一种用于连续生产非烧制颗粒的方法和装置，包括：将连续供应含有碳酸粘合剂的生球团料连续地供入垂直型反应器中，以连续地将生坯粒料依次通过预干燥区，碳酸化区和干燥区 立式反应堆; 将相对湿度高达70％，温度为40℃至250℃的预干燥气体吹入预干燥区，预干燥生坯颗粒，直到预制区内的生球团矿的含水量落入 范围为1至7wt。 ％; 吹入包含5至95体积％的二氧化碳气体的碳酸气体。 ％和饱和蒸汽为5至95体积％。 ％，温度为30℃〜98℃，进入碳酸化区，使生成颗粒中含有的碳酸化粘合剂碳酸化; 并将干燥气体在100℃〜300℃的温度下吹入干燥区，使其中的生球团硬化，从而连续地制造非烧成球团块。
-
公开(公告)号：US5066438A
公开(公告)日：1991-11-19
申请号：US455034
申请日：1989-12-22
申请人： Michitaka Sato , Hiroaki Nishio
发明人： Michitaka Sato , Hiroaki Nishio
IPC分类号： C04B35/593
CPC分类号： C04B35/593
摘要： A method of producing a silicon nitride sintered body which comprises using an amorphous Si.sub.3 N.sub.4 powder having a mean particle size of 5 to 50 nm, a nitrogen content of 30 to 39 wt. %, an oxygen content of 1 to 10 wt. %, the sum of the nitrogen content and the oxygen content being 38 to 42 wt. % and an unavoidable impurities content of less than 500 ppm as the raw material to form a molded body, sealing the molded body in a capsule and treating it with HIP in the range of 1000.degree. to 1800.degree. C. and 1000 to 2000 atm until the density becomes 3.1 to 3.4 g/cm.sup.3. In the method of the invention, active surface energy of silicon nitride powder is utilized as the driving force for sintering due to using a super fine powder. The super fine powder improves sintering ability by uniform mixing. The sintering ability is further improved by substituting a suitable amount of the nitrogen in the silicon nitride with oxygen. By the above means, the sintering strength can be secured under not severe sintering conditions. As a result, a sintering aid can be omitted.
-
公开(公告)号：US5021213A
公开(公告)日：1991-06-04
申请号：US540555
申请日：1990-06-20
申请人： Hiroaki Nishio , Akira Kato , Michitaka Sato , Keiji Watanabe
发明人： Hiroaki Nishio , Akira Kato , Michitaka Sato , Keiji Watanabe
IPC分类号： B22F3/10 , B22F3/12 , B22F3/22 , B28B1/00 , B28B1/26 , B28B7/34 , C04B35/634 , C04B35/636 , C04B35/638
CPC分类号： C04B35/63416 , B22F3/1021 , B22F3/125 , B22F3/22 , B28B1/00 , B28B1/26 , B28B7/342 , C04B35/634 , C04B35/6342 , C04B35/6365 , C04B35/638 , C04B2235/483
摘要： In the method of invention, the formability is imparted to the slurry of a metal or ceramic powder by employing a porous mold and removing the dispersion medium through the evaporation or thermal decomposition thereof, or by using a silazane oil as the dispersion medium and curing it by heating. Since the phase change usually accompanying volume change does not occur in the dispersion medium, strain and deformation rarely occur in the molded body. As result, the sintered body obtained has high dimensional accuracy.
-
公开(公告)号：US4761264A
公开(公告)日：1988-08-02
申请号：US61896
申请日：1987-06-12
申请人： Hiroaki Nishio , Jun Harada
发明人： Hiroaki Nishio , Jun Harada
CPC分类号： B22F3/1233 , B22F3/04 , B30B11/001 , Y10S264/78 , Y10S425/014
摘要： A method for molding powders which comprises introducing a thin-wall resilient mold inside a ventilative mold support, reducing the outside pressure of the ventilative mold support to less than the atmospheric pressure (760 Torr), putting a thin-wall resilient mold exactly close to the inside wall of the ventilative mold support, supplying powder material into the thin-wall resilient mold, exhausting air existing in the voids formed in the powder material, and taking the ventilative mold support apart to apply cold isostatic press treatment to the thin-wall resilient mold. The shape of the thin-wall resilient mold is similar to the shape of the ventilative mold support.
摘要翻译： 一种用于模制粉末的方法，其包括将薄壁弹性模具引入通风模具支架内，将通气模具支架的外部压力降低到小于大气压力（760托），将薄壁弹性模具精确地接近 通风模具支撑的内壁，将粉末材料供应到薄壁弹性模具中，排出存在于粉末材料形成的空隙中的空气，并将通风模具支架分开，以对冷壁进行冷等静压处理 弹性模具。 薄壁弹性模具的形状类似于通风模具支架的形状。
-
-
-
-
-
-
-
-
-
搜索结果
38 条记录 (耗时 0.016 秒)
