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1. 发明授权

US4037643A Nodularizing treatment employing unitized modifying agent 失效
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
IPC分类号： B22D2/00 , C21C1/08 , C21C1/10 , B22D27/20
CPC分类号： B22D2/00 , C21C1/08 , C21C1/10
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.

2. 发明授权

US5390723A Method of treating casting metals 失效
标题翻译：铸造金属的处理方法
公开(公告)号：US5390723A
公开(公告)日：1995-02-21
申请号：US137894
申请日：1993-10-18
申请人： Prem P. Mohla , Eli David
发明人： Prem P. Mohla , Eli David
IPC分类号： B22C9/08 , B22D1/00 , B22D27/20
CPC分类号： B22C9/082 , B22C9/086 , B22D1/007
摘要： Metallurgically treated metal castings are produced using a consumable plug assembly made of a meltable material which is placed in a reaction chamber in an open treating basin and above a passage to a molding cavity. The consumable plug assembly has physical and chemical characteristics which maintain the plugged relationship for a preselected retaining period. All of a treating material is placed on the plug in the reaction chamber prior to metal pouring so as to react directly with the poured metal in a non-dynamic way.
摘要翻译：冶金处理的金属铸件是使用可熔化材料制成的消耗性塞子组件制成的，该可熔化材料被放置在开放的处理池中的反应室中并且在通向模腔的通道之上。消耗性插头组件具有物理和化学特性，其保持预选保持期的插入关系。在金属浇注之前，将所有处理材料放置在反应室中的塞子上，以便以非动态的方式直接与浇注的金属反应。

3. 发明授权

US4245691A In situ furnace metal desulfurization/nodularization by high purity magnesium 失效
标题翻译：原位炉金属脱硫/高纯镁结核
公开(公告)号：US4245691A
公开(公告)日：1981-01-20
申请号：US856697
申请日：1977-12-02
申请人： Prem P. Mohla
发明人： Prem P. Mohla
IPC分类号： C21C1/02 , B22D27/20 , C22C33/10
CPC分类号： C21C1/02
摘要： A method of desulfurizing iron in an induction furnace is disclosed. High purity magnesium, carried in a lance controlled cartridge, is plunged into the lower zone of a molten metal pool of an induction furnace; the cartridge is held submerged for a period of 30-200 seconds. The molten metal column above the submerged cartridge must be at least 2.5 feet, preferably 6-7 feet. The molten metal temperature at the time of cartridge plunging is limited to 2400.degree. F. or less. Magnesium recovery will be at least 70%, which is better than other prior art methods by a factor of 1.4.
摘要翻译：公开了一种在感应炉中脱硫铁的方法。携带在喷枪控制的盒中的高纯度镁浸入感应炉的熔融金属池的下部区域; 墨盒被淹没30-200秒。浸没式墨盒上方的熔融金属柱必须至少为2.5英尺，最好为6-7英尺。料筒插入时的熔融金属温度限制在2400°F以下。镁回收率至少为70％，比其他现有技术方法要好1.4倍。

4. 发明授权

US07097688B1 Method for producing silicon based alloys in atomized form 有权
标题翻译：以雾化形式生产硅基合金的方法
公开(公告)号：US07097688B1
公开(公告)日：2006-08-29
申请号：US10390468
申请日：2003-03-17
申请人： Prem P. Mohla , Gregory W. Schott , Clinton J. Holley , John W. Casto
发明人： Prem P. Mohla , Gregory W. Schott , Clinton J. Holley , John W. Casto
IPC分类号： B22F9/08
CPC分类号： C01B33/06 , B22F2009/0832 , B22F2009/0872 , B22F2009/0888 , B22F2998/00 , B22F9/082 , B22F2201/02
摘要： A method for producing an alloy in atomized form, wherein the alloy includes between about 10% to about 100% of a silicon based alloy, including obtaining a base silicon-iron alloy mixture and an atomization unit having an atomization chamber and a plurality of nozzles, injecting an atomizing fluid into the atomization chamber via the plurality of nozzles, introducing the base silicon-iron alloy mixture into the atomization chamber such that the atomizing fluid impinges on the base silicon-iron alloy mixture to produce the alloy in atomized form, cooling the alloy in atomized form using a pool of water so as to produce a cooled alloy product, retrieving the cooled alloy product and drying the cooled alloy product to produce the alloy in atomized form.
摘要翻译：一种以雾化形式制备合金的方法，其中所述合金包括约10％至约100％的硅基合金，包括获得基底硅铁合金混合物和具有雾化室的雾化单元和多个喷嘴通过多个喷嘴将雾化流体喷射到雾化室中，将基础硅 - 铁合金混合物引入雾化室，使得雾化流体冲击基底硅 - 铁合金混合物以产生雾化形式的合金，冷却使用水池的雾化形式的合金，以产生冷却的合金产品，回收冷却的合金产品并干燥冷却的合金产品以产生雾化形式的合金。

5. 发明授权

US4040821A Nodularizing catalyst for cast iron and method of making same 失效
标题翻译：铸铁球结催化剂及其制备方法
公开(公告)号：US4040821A
公开(公告)日：1977-08-09
申请号：US711680
申请日：1976-08-04
申请人： Adolf Hetke , Prem P. Mohla , Robert J. Warrick
发明人： Adolf Hetke , Prem P. Mohla , Robert J. Warrick
IPC分类号： B22C9/06 , B22D1/00 , C21C1/10 , C22C33/08 , C22C28/00
CPC分类号： B22D1/007 , B22C9/06 , C21C1/10 , Y10T428/12181 , Y10T428/12208 , Y10T428/12222
摘要： An improved catalyst is disclosed for making spheroidal graphite cast iron, the catalyst being in the form of a solid impervious and brittle block but severed from a sheet stock having a predetermined grid pattern of perforations or notches along at least one surface of said sheet stock. The block is substantially devoid of segregation and oxide interiorally thereof; the thickness of said block is increased over that capable of being produced by the prior art in the as-cast condition and yet devoid of segregation. The method of making such block comprises casting the molten catalyst into shallow closed pans, the cover for said pans carrying a pattern of ribs or projections, the cover and pan cooperating to define a selected configuration for an as-cast sheet stock. The resulting cast product can be manually or automatically broken along any desired module, defined by said grid pattern, to suit a variety of in plant casting applications particularly utilizing in-the-mold nodularizing treatment. The latter method places a nodularizing catalyst in a recess or reaction chamber defined within the gating system of a mold, whether constructed of bonded sand or pre-cast refractory.
摘要翻译：公开了用于制备球墨铸铁的改进的催化剂，该催化剂为固体不透性和脆性块的形式，但是沿着所述片状原料的至少一个表面具有预定的穿孔或缺口网格图案的片材切断。该块基本上没有内部的偏析和氧化物; 所述块的厚度比在铸态条件下由现有技术产生的厚度增加，但是没有分离。制造这种块的方法包括将熔融催化剂浇铸到浅闭合盘中，用于所述盘的盖具有肋或突起的图案，盖和盘协作以形成用于铸造片材的选定构型。所得到的铸造产品可以沿着由所述网格图案限定的任何所需模块手动或自动断裂，以适应于各种植物浇铸应用，特别是利用模内结节化处理。后一种方法将结节状催化剂置于限定在模具的浇注系统内的凹槽或反应室中，无论是由粘结砂或预制耐火材料构成。

6. 发明授权

US4003424A Method of making ductile iron treating agents 失效
标题翻译：制造球墨铸铁处理剂的方法
公开(公告)号：US4003424A
公开(公告)日：1977-01-18
申请号：US630569
申请日：1975-11-10
申请人： Adolf Hetke , Prem P. Mohla , Robert J. Warrick
发明人： Adolf Hetke , Prem P. Mohla , Robert J. Warrick
IPC分类号： C21C1/10 , B22C7/02 , B22C9/04 , B22C9/20 , B22D1/00 , B22D27/20 , B22D21/00 , B22D25/02
CPC分类号： B22C9/046 , B22C9/20 , B22D1/00 , B22D27/20
摘要： A method of making a more economical and reliable treating agent for use in late metal treatment when pouring metal castings. The treating agent is defined as an essentially homogeneous solid cast block preferably containing alloying ingredients to nodulize or inoculant ferrous metal. Each block is designed to present a generally uniform reaction surface to molten metal to be treated. This is obtained by casting the block to a shape which snugly fits a prepared basin in the mold gating system over which the molten metal to be treated must flow, or to cast the block in an annular configuration through which the molten metal must flow. The latter block has contoured inner surfaces which maintain a generally constant reactive surface as the block is consumed. These blocks are preferably prepared by simultaneously casting a large number in closely nested relation. Each mold for said blocks receives molten material, out of which the agent is formed, from a common sprue; runners interconnect the mold cavities and sprue, for example, in a simulated "Christmas tree" arrangement. The gating system and mold cavity pattern, for casting the treating agent to a special shape are all comprised of a material that will vaporize upon contact by the molten treating agent, such as polystyrene. The unitary tree structure of foam patterns and gating system is placed in a flask and surrounded by unbonded heat absorbing particles, such as sand or steel shot. Rapid solidification is assured by the selection of heat absorbing particles and by the use of the vaporizable patterns to avoid noticeable segregation in the alloy blocks. The blocks formed for the treating agent are characterized by increased homogeneity, absence of undesirable segregation, absence of internal oxidation, and absence of organic or refractory impurities; the blocks are less costly to make both as to capital requirements and operating expenses.
摘要翻译：一种在浇注金属铸件时制备更经济可靠的后处理金属处理剂的方法。该处理剂被定义为基本上均匀的固体铸块，优选含有合成成分以使其结节化或接种黑色金属。每个块被设计成对待处理的熔融金属呈现大致均匀的反应表面。这是通过将块浇铸成适合于待浇铸的熔融金属必须流动的模具浇注系统中的准备好的盆地的形状，或者将块浇铸成熔融金属必须流过的环形构型。后一块具有轮廓的内表面，当块被消耗时，其保持大体上恒定的反应性表面。这些块优选通过以嵌套密切的关系同时浇铸大量来制备。用于所述块的每个模具从公共浇道接收熔融材料，其中形成所述试剂; 赛跑者将模腔和浇道相互连接，例如模拟的“圣诞树”排列。用于将处理剂浇铸成特殊形状的浇注系统和模腔图案都由当熔融处理剂如聚苯乙烯接触时将气化的材料构成。将泡沫图案和浇注系统的单一树结构放置在烧瓶中，并由未粘合的吸热颗粒（例如砂或钢丸）包围。通过选择吸热颗粒并通过使用可汽化图案来确保快速凝固，以避免合金块中明显的偏析。形成用于处理剂的嵌段的特征在于均匀性增加，不存在不希望的分离，不存在内部氧化，以及不存在有机或难熔杂质; 对于资本要求和运营费用，这些块的成本较低。

7. 发明授权

US4204666A In situ furnace metal desulfurization/nodularization by high purity magnesium 失效
标题翻译：原位炉金属脱硫/高纯镁结核
公开(公告)号：US4204666A
公开(公告)日：1980-05-27
申请号：US943274
申请日：1978-09-18
申请人： Prem P. Mohla
发明人： Prem P. Mohla
IPC分类号： C21C1/02 , C21C1/10 , C21C7/02 , C22C33/10 , D02G3/00
CPC分类号： C21C1/02 , C21C1/10 , Y10T428/249922 , Y10T428/2925 , Y10T428/2936
摘要： A method of desulfurizing iron in an induction furnace is disclosed. High purity magnesium, carried in a lance controlled cartridge, is plunged into the lower zone of a molten metal pool of an induction furnace; the cartridge is held submerged for a period of 30-200 seconds. The molten metal column above the submerged cartridge must be at least 2.5 feet, preferably 6-7 feet. The molten metal temperature at the time of cartridge plunging is limited to 2400.degree. F. or less. Magnesium recovery will be at least 70%, which is better than other prior art methods by a factor of 1.4.
摘要翻译：公开了一种在感应炉中脱硫铁的方法。携带在喷枪控制的盒中的高纯度镁浸入感应炉的熔融金属池的下部区域; 墨盒被淹没30-200秒。浸没式墨盒上方的熔融金属柱必须至少为2.5英尺，最好为6-7英尺。料筒插入时的熔融金属温度限制在2400°F以下。镁回收率至少为70％，比其他现有技术方法要好1.4倍。

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