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公开(公告)号：US4711288A
公开(公告)日：1987-12-08
申请号：US10239
申请日：1987-02-02
申请人： Douglas J. Harvey
发明人： Douglas J. Harvey
摘要： Casting aluminum by a lost foam process is improved by treating the metal during pattern replacement with a halide salt flux to inhibit formation of oxide fold defects. A preferred flux comprises a mixture of alkaline metal chloride compounds and includes an aluminum fluoride salt, such as sodium aluminum fluoride. In a preferred embodiment, the flux is incorporated into a polystyrene pattern prior to embedding the pattern in a sand mold and becomes dispersed on a front of the cast metal as the front progressively decomposes the pattern.
摘要翻译： 通过用卤化物盐助焊剂处理图案置换期间的金属来抑制氧化物折痕缺陷的形成，通过失去泡沫的方法来铸造铝得到改善。 优选的助熔剂包括碱金属氯化物化合物的混合物，并且包括氟化铝盐如氟化铝钠。 在优选实施例中，在将图案嵌入砂模中之前，将焊剂并入聚苯乙烯图案中，并且随着前沿逐渐分解图案而分散在铸造金属的前部。
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82.发明授权
公开(公告)号：US4696337A
公开(公告)日：1987-09-29
申请号：US920561
申请日：1986-10-17
摘要： The apparatus has a supply system 1 and measuring system 2, connected via suitable electrodes to the mould 3. This mould 3 has a cylindrical shape and a cylindrical pouring cup. The cavity of the mould 3 has been divided by vertical walls 4 and 5 into three parts in such a way that the wall 4 divides the mould 3 into two halves and the wall 5, in turn, divides one of the halves also into two equal parts. The electrodes of the supply system 1 and measuring system 2 have been mounted in the bottom of the mould 3 in the portions delimited by the wall 5. The shape of the mould ensures a directional solidification of the specimens contained therein. Owing to this a compact specimen is obtained without shrinkage porosities and contraction cavities over the measuring length. The structure of the alloy is anticipated from the curve of variations of voltage signal during the period from the moment of pouring of liquid metal into the mould 3 to the moment of solidification of the specimen.
摘要翻译： 该装置具有通过合适的电极连接到模具3的供应系统1和测量系统2.该模具3具有圆柱形形状和圆柱形浇注杯。 模具3的空腔已经被垂直壁4和5分成三部分，使得壁4将模具3分成两半，并且壁5又将其中的一个分成两个相等的 部分。 供给系统1和测量系统2的电极已经在由壁5限定的部分中安装在模具3的底部。模具的形状确保了包含在其中的样本的定向凝固。 因此，在测量长度上没有获得紧凑的样品，没有收缩孔隙和收缩腔。 从液态金属注入模具3的时刻到样品凝固时刻的期间，可以从电压信号的变化曲线预测合金的结构。
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公开(公告)号：US4419801A
公开(公告)日：1983-12-13
申请号：US226099
申请日：1981-01-19
申请人： Hajime Yamashita , Michio Takenaka
发明人： Hajime Yamashita , Michio Takenaka
CPC分类号： F02F7/0007 , B23P15/00 , F05C2201/0436 , Y10T29/4927 , Y10T29/49989
摘要： Method for manufacturing a cast iron cylinder block including steps of moulding the cylinder block with a cylinder wall formed with one or more protuberances in areas that will be subjected to piston side thrust forces so that the cylinder wall possesses a structure having more advanced growth of graphite in the aforementioned areas than in other areas, and thereafter removing the protuberance to form a cylinder bore. The cylinder block thus produced has a high ability of absorbing piston slap noise.
摘要翻译： 制造铸铁缸体的方法，包括以下步骤：在具有一个或多个凸起的气缸壁上模制气缸体，该气缸壁将受到活塞侧推力的区域，使得气缸壁具有具有更先进的石墨生长的结构 在上述区域中比在其它区域中，然后移除突起以形成气缸孔。 如此制造的气缸体具有吸收活塞撞击噪声的高能力。
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公开(公告)号：US4345950A
公开(公告)日：1982-08-24
申请号：US142527
申请日：1980-04-21
申请人： Kevin S. O'Hara
发明人： Kevin S. O'Hara
CPC分类号： C22F1/10
摘要： A composite grained cast article is provided from a superalloy casting in the single grained condition, in one form, by mechanically working a portion of the article intended to operate at a lower temperature of up to about 1300.degree. F. The mechanically worked portion is then recrystallized by heating to provide a multi-grained portion. In another form, the multi-grained portion is provided by selective use of grain nucleation material during solidification.
摘要翻译： 复合颗粒铸造制品是通过在单一颗粒状态的超级合金铸件中以一种形式，通过机械加工一部分制品，以在较高的温度高达约1300°F下工作的。然后机械加工的部分 通过加热重结晶以提供多晶粒部分。 在另一种形式中，通过在凝固期间选择性使用晶粒成核材料来提供多晶粒部分。
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公开(公告)号：US4295883A
公开(公告)日：1981-10-20
申请号：US163177
申请日：1980-06-26
申请人： Rajko Lajh
发明人： Rajko Lajh
CPC分类号： B01D19/0005 , B01F5/0413 , B22D1/005 , C22B9/055 , Y10S588/90
摘要： Gases can be introduced in a finely divided form into molten metal using a jet-mixing facility which is designed on the Venturi principle and is made of a suitable refractory material. Melt flow rates of 2-100 m/s are measured in the cylindrical center piece of this mixer, and gas is sucked in at a reduced pressure of 0.05 to 0.9 bar. By means of this process an injector efficiency (ratio of throughput of propellant to throughput of purifying medium) of 3.75-4.0 is achieved.
摘要翻译： 气体可以以细分散的形式引入熔融金属中，该喷射混合设备是以文丘里原理设计的，并由合适的耐火材料制成。 在该混合器的圆柱形中心件中测量2-100m / s的熔体流动速率，并且在0.05至0.9巴的减压下吸入气体。 通过该过程，实现了喷射器效率（推进剂的通过量与净化介质的通过量的比例）为3.75-4.0。
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公开(公告)号：US4220191A
公开(公告)日：1980-09-02
申请号：US971564
申请日：1978-12-20
申请人： John E. Fogarty
发明人： John E. Fogarty
IPC分类号： B22D11/10 , B22D11/108 , B22D11/11 , C21C7/00 , B22D27/20
CPC分类号： C21C7/0056 , B22D11/108 , B22D11/11
摘要： A method of continuously casting steel in an open-bottom mould, with an addition of aluminum to molten steel, as the latter enters the mould, includes the addition of a fluxing agent to the molten steel, as the latter enters the mould, to fluidize viscous slags and thereby to mitigate detrimental surface characteristics which would otherwise be produced in the steel, when cast, as a result of such slags. Preferably, the fluxing agent is a metal oxide, e.g. manganese oxide, silicon oxide, boron oxide or sodium oxide, or a mixture of metal oxides, provided as a coating on an aluminum wire, which wire may constitute the aluminum addition. The invention further includes a steel additive comprising such a coated aluminum wire.
摘要翻译： 一种在开口底模中连续铸造钢的方法，当钢水进入模具时，向钢水中添加铝包括向钢水中添加助熔剂，随着后者进入模具中，流化 粘性矿渣，从而减轻由于这种炉渣而在铸造时钢铁产生的有害表面特性。 优选地，助熔剂是金属氧化物，例如金属氧化物。 氧化锰，氧化硅，氧化硼或氧化钠，或作为铝线上的涂层提供的金属氧化物的混合物，该线可以构成铝添加。 本发明还包括包含这种涂覆的铝线的钢添加剂。
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公开(公告)号：US4057097A
公开(公告)日：1977-11-08
申请号：US664093
申请日：1976-03-05
申请人： Benno Lux , Wilfried Kurz , Jean-Claude Hubert , Francois Mollard , Guido Walt
发明人： Benno Lux , Wilfried Kurz , Jean-Claude Hubert , Francois Mollard , Guido Walt
CPC分类号： C30B11/003 , B22D27/045 , C30B11/00 , C30B29/605
摘要： A metallic alloy is cast in a mold to produce a solid body by unidirectional solidification. The alloy, initially in a molten state, is cast into a mold and is completely and progressively cooled in the mold while a unidirectional thermal gradient superimposed thereon parallel to a direction determined by the configuration of the mold (predetermined direction) until a metastable equilibrium is reached in which the entire body of the melt is in a super-cooled state as a homogeneous liquid. The equilibrium is then broken to cause solidification of the alloy and the formation of dendritic crystals with their principal axes parallel to the thermal gradient substantially instantly and without noticeable advance of a solidification front across the melt.
摘要翻译： 金属合金铸造在模具中，通过单向凝固生产固体。 初始处于熔融状态的合金被铸造成模具，并且在模具中完全和逐渐冷却，同时叠加在其上的单向热梯度平行于由模具构型确定的方向（预定方向）直到亚稳定平衡为止 熔体的整个体均匀地成为超冷却状态。 然后将平衡破裂，导致合金凝固和树枝状晶体的形成，其主轴基本上立即平行于热梯度，并且在凝固前沿穿过熔体没有明显的进展。
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公开(公告)号：US4037643A
公开(公告)日：1977-07-26
申请号：US606909
申请日：1975-08-22
申请人： Prem P. Mohla , Adolf Hetke , Robert J. Warrick
发明人： Prem P. Mohla , Adolf Hetke , Robert J. Warrick
摘要： A method and apparatus is disclosed for conditioning a charge of molten cast iron, which would normally solidify with a flake graphite structure, to produce partial or total spheroidal graphite cast iron. In addition, the method and apparatus can be used to further condition a partially conditioned cast iron to yield a partial or fully spheroidal graphite cast iron. A recess is provided in the metal flow system (within or without the mold system) leading to the casting cavity or cavities. The recess has a shape and cross-section (taken in directions normal to the direction of flow of the molten charge) such that the spheroidizing agent dissolves uniformly when the molten iron flows over it to achieve unprecedented homogeneity. A dense solid unitary block of spheroidizing or nodularizing agent, substantially devoid of MgO interiorly thereof, is typically snugly fitted in said recess and mates with the side walls and bottom of said recess. The block typically presents a substantially constant and uniform interface with the molten charge during all stages of conditioning and pouring; however, a deviation in the interface area may be designed into the block to compensate for molten iron temperature variations or molten iron flow rate variations when the casting technique experiences unusually high variations in the ferrostatic pressure head. A relationship is disclosed between charge weight, charge flow rate, magnesium concentration in the spheroidizing alloy, and interface area so as to determine a desired degree of nodularity in the final casting and/or to design a solution rate compatible with a specific casting technique. The residual magnesium can be reliably maintained at a level sufficient to consistently obtain full spheroidal graphite shape. A preferred magnesium level is 0.020% to 0.040% of the weight of the casting but higher or lower levels can be reliably obtained if required by base metal chemistry. This is significant since the prior art has been unable to reliably obtain full nodularity with 0.02-0.025% residual magnesium under commercial conditions.
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公开(公告)号：US4004630A
公开(公告)日：1977-01-25
申请号：US571621
申请日：1975-04-28
摘要： The present invention provides a method for the production of modular graphite cast iron using a mould comprising a pouring bush, downsprue, gating and risering system, mould cavity and an intermediate chamber having a base and retaining walls positioned in the path of molten metal entering the mould and adapted to contain a nodularizing agent wherein the surface area of the base A = (l/k) (W.sub.T /T) (N.sub.nod /W.sub.T)where:l/k = constantW.sub.T /T = pouring rate of the metalN.sub.nod /W.sub.T = concentration of nodularizing agent in the molten metals.
摘要翻译： 本发明提供了一种使用模具生产模块化石墨铸铁的方法，所述模具包括浇注衬套，下浇口，浇口和摩擦系统，模腔和中间室，所述模具腔和中间室具有位于熔融金属进入所述熔融金属 模塑并适于含有结核剂，其中碱A的表面积=（1 / k）（WT / T）（Nnod / WT）其中：
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公开(公告)号：US3483913A
公开(公告)日：1969-12-16
申请号：US3483913D
申请日：1967-03-22
CPC分类号： C22B9/02 , B22D43/004 , G21C19/48 , Y02P10/234 , Y02W30/884
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