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1.发明授权
公开(公告)号：US5518060A
公开(公告)日：1996-05-21
申请号：US186684
申请日：1994-01-25
CPC分类号： B22C7/026
摘要： A method of producing polymeric foam patterns for use in evaporable foam casting. A positive three-dimensional model of the metal part to be cast is made by a layered prototyping process in which layers of sheet material are bonded in superimposed relation and the contour of the part to be cast is cut into each layer as it is applied to preceding layers to provide the model. A metal, such as copper, is then deposited on the working surface of the model to provide a rigid self-supporting shell having a surface which is the negative image of the part to be cast. The shell, after separation from the model, is then mounted in a die casting mold with the negative surface bordering a die cavity. Beads of a polymeric material, such as polystyrene, are introduced into the die cavity and heated to fuse the beads and provide a foam pattern which is identical in configuration to the metal part to be ultimately cast.
摘要翻译： 一种生产用于可蒸发泡沫铸塑的聚合物泡沫图案的方法。 要铸造的金属部件的正三维模型是通过分层原型制造工艺制成的，其中片材层被叠加地结合，并且待施加部件的轮廓被切割成每一层，因为它被应用于 以前的层提供模型。 然后将诸如铜的金属沉积在模型的工作表面上，以提供具有作为待铸造部件的负像的表面的刚性自支撑壳。 然后将壳体与模型分离，然后将其安装在具有与模腔相邻的负表面的压铸模具中。 将诸如聚苯乙烯的聚合物材料的珠子引入模腔中并加热以使珠熔合，并提供与最终铸造的金属部件相同构造的泡沫图案。
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公开(公告)号：US06427759B1
公开(公告)日：2002-08-06
申请号：US09585136
申请日：2000-06-01
申请人： Richard S. Bauer , Barry L. Riutta , Terrance M. Cleary , Raymond J. Donahue , Kevin R. Anderson
发明人： Richard S. Bauer , Barry L. Riutta , Terrance M. Cleary , Raymond J. Donahue , Kevin R. Anderson
IPC分类号： B22C900
摘要： An investment cast stainless steel article, such as a marine propeller, is composed of a stainless steel alloy containing from 14.5 to 15.2% chromium, 5.35% to 6.05% nickel and 1.0% to 1.5% silicon. During the investment casting procedure, the increased silicon in the stainless steel lowers the driving force for the silicon from reacting with the molten metal, thereby reducing casting defects and decreasing the time and labor required for final grinding and polishing of the propeller
摘要翻译： 投资不锈钢制品如船用螺旋桨由含有14.5至15.2％铬，5.35％至6.05％镍和1.0％至1.5％硅的不锈钢合金组成。 在熔模铸造过程中，不锈钢中增加的硅降低了硅与熔融金属反应的驱动力，从而减少了铸造缺陷并减少了螺旋桨的最终研磨和抛光所需的时间和人力
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3.发明授权Evaporable foam casting system utilizing an aluminum-silicon alloy containing a high magnesium content 失效使用含有高镁含量的铝硅合金的可蒸发泡沫浇注系统
公开(公告)号：US5290373A
公开(公告)日：1994-03-01
申请号：US52170
申请日：1993-04-23
摘要： A method of evaporable foam casting of metal articles, such as engine blocks for internal combustion engines. An evaporable foam pattern having a configuration proportionally identical to the article to be cast is positioned in a mold and a finely divided flowable material, such as sand, surrounds the pattern and fills the internal cavities of the pattern. A molten hypereutectic aluminum-silicon alloy containing 16% to 19.5% by weight of silicon and containing a magnesium content in excess of the magnesium solid solubility limit, is fed into the mold and into contact with the pattern. The heat of the molten metal vaporizes the pattern, with the vapor being trapped within the sand and the molten metal filling the void created by vaporization of the pattern to provide a cast article. The high magnesium content in the alloy produces in the solid state a Mg.sub.2 Si phase in the eutectic and in the molten state an insulating magnesium oxide surface film which decreases the chilling of the molten metal front and prevents the liquid styrene defects resulting from degradation of the polymeric material.
摘要翻译： 一种用于内燃机的发动机缸体的金属制品的可蒸发泡沫铸造的方法。 具有与要铸造的制品成比例地相同的构造的可蒸发泡沫图案位于模具中，并且细碎的可流动材料（例如砂）围绕图案并填充图案的内部空腔。 将含有16重量％至19.5重量％硅并含有镁含量超过镁固溶度极限的熔融过共晶铝硅合金进料到模具中并与图案接触。 熔融金属的热量蒸发图案，其中蒸汽被捕获在砂中，并且熔融金属填充由图案的蒸发产生的空隙以提供铸造制品。 合金中的高镁含量在固态中产生在共晶中和在熔融状态下的Mg2Si相，其中绝缘的氧化镁表面膜减少了熔融金属前沿的冷却，并且防止由聚合物降解引起的液体苯乙烯缺陷 材料。
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公开(公告)号：US4858671A
公开(公告)日：1989-08-22
申请号：US183622
申请日：1988-04-19
摘要： Molten metal is poured in an open top basin that communicates via a sprue with a cavity or expendable pattern in a mold to fill the cavity and partially fill the basin. After the casting metal has solidified through the gating that connects the sprue to the cavity, a tapered heat transfer member is introduced into the molten metal in the basin. A cooling medium is passed through the heat transfer member to extract heat from the metal in the basin and correspondingly cool the metal casting, thereby decreasing the cooling period prior to shakeout.
摘要翻译： 将熔融的金属倒入开放的顶部盆中，通过浇口与模具中的空腔或消耗模式相通以填充空腔并部分填充盆。 铸造金属通过连接浇道到腔体的浇口固化后，锥形传热构件被引入到盆中的熔融金属中。 冷却介质通过传热构件，从盆中的金属提取热量，并对金属铸件进行相应的冷却，从而在冷却前降低冷却时间。
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公开(公告)号：US07666353B2
公开(公告)日：2010-02-23
申请号：US11042252
申请日：2005-01-25
IPC分类号： C22C21/04
摘要： An aluminum silicon die cast alloy having a very low iron content and relatively high strontium content that prevents soldering to dies into die casting process. The alloys of the present invention also have a modified eutectic silicon and modified iron morphology, when iron is present, resulting in low microporosity and high impact properties. The alloy comprises 6-22% by weight silicon, 0.05 to 0.20% by weight strontium and the balance aluminum. Preferably, the alloy of the present invention contains in weight percent: 6-20% silicon, 0.05-0.10% strontium, 0.40% maximum iron and most preferably 0.20% maximum iron, 4.5% maximum copper, 0.50% maximum manganese, 0.60% maximum magnesium, 3.0% maximum zinc, balance aluminum. On cooling from the solution temperature, the strontium serves to modify the eutectic silicon structure as well as create an iron phase morphology change if iron is present, facilitating feeding through the aluminum interdendritic matrix. This, in turn, creates a finished die cast product with extremely low levels of microporosity defects. The strontium content also appears to create a non-wetting monolayer of strontium atoms on the surface of a molten casting, preventing die soldering, even at very low iron contents. The alloy may be used to cast any type of object and is particularly suited for casting outboard marine propellers, driveshaft housings, gear case housings, Gimbel rings and engine blocks.
摘要翻译： 铝硅压铸合金，具有非常低的铁含量和相对较高的锶含量，防止模具焊接到压铸过程中。 当存在铁时，本发明的合金还具有改性的共晶硅和改性的铁形态，导致低微孔性和高冲击性。 该合金包含6-22重量％的硅，0.05-0.20重量％的锶和余量的铝。 优选地，本发明的合金优选含有6-20％硅，0.05-0.10％锶，0.40％最大铁，最优选0.20％最大铁，4.5％最大铜，最大锰0.50％，最大0.60％ 镁，3.0％最大锌，余量铝。 在从溶液温度冷却时，锶用于改变共晶硅结构，并且如果存在铁，则产生铁相形态变化，促进通过铝树枝状间质基质进料。 这又产生了具有极低水平的微孔缺陷的成品压铸产品。 锶含量也似乎在熔融铸件的表面上产生锶原子的非润湿单层，即使在非常低的铁含量下也能防止模具焊接。 该合金可用于铸造任何类型的物体，特别适用于铸造船外螺旋桨，传动轴壳体，齿轮箱壳体，Gimbel环和发动机缸体。
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6.发明授权Apparatus and improved method for lost foam casting of metal articles using external pressure 失效使用外部压力的金属制品的失去泡沫铸造的装置和改进方法公开(公告)号：US06883580B1
公开(公告)日：2005-04-26
申请号：US10351785
申请日：2003-01-27
IPC分类号： B22C9/04
CPC分类号： B22C9/046
摘要： An apparatus and method to delay the application of pressure on a molten metal front to equalize a pressure gradient present at the molten metal front during pressurized lost foam casting processes, or other pressurized casting processes. A pressure equalization member is placed over a pouring cup to divert the direct application of pressure to molten metal present in the pouring cup. The pressure equalization member allows for increased pressurization rates in such processes, facilitating interdendritic feeding while reducing microporosity and metal penetration defects.
摘要翻译： 一种用于延迟在熔融金属前部施加压力以在加压的失去泡沫铸造工艺或其它加压铸造工艺期间均衡存在于熔融金属前部的压力梯度的装置和方法。 压力平衡构件放置在浇注杯上方以将压力的直接施加转移到存在于浇注杯中的熔融金属。 压力平衡构件允许在这种方法中增加加压速率，从而促进枝间进料同时减少微孔和金属渗透缺陷。
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7.发明授权Method of casting hypereutectic aluminum-silicon alloys using an evaporable foam pattern and pressure 失效使用可蒸发泡沫图案和压力铸造过共晶铝硅合金的方法
公开(公告)号：US6024157A
公开(公告)日：2000-02-15
申请号：US975693
申请日：1997-11-21
CPC分类号： B22D21/007 , B22C7/02 , B22D27/13
摘要： A method of casting hypereutectic aluminum-silicon alloys in an evaporable foam casting process with the application of pressure during the solidification of the alloy. A pattern is formed from a polymeric material having a configuration of an article to be cast. The pattern is supported in an outer mold and unbounded sand surrounds the pattern and fills the cavities within the pattern. The pattern is contacted with a molten hypereutectic aluminum-silicon alloy containing 16% to 30% silicon and having less than 0.8% copper. The molten alloy decomposes the foam pattern with the vapors of decomposition being entrapped within the interstices of the sand. While the alloy is in the molten state, gas pressure is applied to the alloy in the magnitude of 5 to 12 atmospheres to produce a cast alloy having less than 0.03% porosity and a high cycle fatigue strength greater than 13 KSI.
摘要翻译： 在合金凝固过程中施加压力，在蒸发泡沫铸造工艺中铸造过共晶铝硅合金的方法。 由具有要铸造的制品的构型的聚合物材料形成图案。 该图案支撑在外模中，并且无界砂围绕图案并填充图案内的空腔。 该图案与含有16％至30％硅并且具有小于0.8％铜的熔融过共晶铝硅合金接触。 熔融合金将泡沫图案与分解的蒸气分离在砂的空隙内。 当合金处于熔融状态时，气体压力以5至12个大气压施加到合金上，以产生孔隙率小于0.03％，循环疲劳强度大于13KSI的铸造合金。
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公开(公告)号：US4964973A
公开(公告)日：1990-10-23
申请号：US391132
申请日：1989-08-08
CPC分类号： C22B4/005 , C22B34/1263 , C22B9/226
摘要： A method of producing titanium. A quantity of titianium is heated in a crucible to provide a melt, and a layer of slag, containing an ionizable titanium compound, such as titanium dioxide, along with ionizable slag constituents, is disposed on the top of the melt. The slag is then heated to a molten state by direct current plasma arc heating with the melt being anodic. After the slag is molten, the polarity of the plasma arc heating is reversed so that the melt is cathodic, causing the slag to act as an electron transfer layer so that the titanium dioxide of the slag is reduced to titanium and any dissolved oxygen in the melt is converted to an ionic species of oxygen at the interface between the slag and the melt. The resulting liquid titanium is combined with the melt, while the ionic species of oxygen is carried upwardly through the slag and released from the slag layer by an oxidation process. Additional quantities of titanium dioxide can be added to the slag to continually convert the titanium dioxide to titanium under the reverse polarity plasma arc heating.
摘要翻译： 钛的制造方法。 将钛的量在坩埚中加热以提供熔体，并且在熔体的顶部上设置包含可电离的钛化合物（例如二氧化钛）以及可离子化的炉渣成分的炉渣层。 然后通过直接等离子体电弧加热将炉渣加热至熔融状态，熔体是阳极的。 炉渣熔化后，等离子体电弧加热的极性反转，使得熔体呈阴极，从而使炉渣作为电子转移层，从而将炉渣的二氧化钛还原为钛，并将其中的溶解氧 熔体在炉渣和熔体之间的界面转化为氧离子。 所得到的液体钛与熔体结合，而氧的离子物质向上运送通过炉渣并通过氧化过程从渣层释放。 可以向渣中加入额外量的二氧化钛，以在反极性等离子体电弧加热下将二氧化钛连续地转化为钛。
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公开(公告)号：US4830085A
公开(公告)日：1989-05-16
申请号：US160729
申请日：1988-02-26
CPC分类号： F02F7/00 , B22C9/046 , B22D18/06 , F02F2200/08
摘要： A lost foam casting system (2) is provided with vacuum lift of molten metal (16) to an evaporative foam pattern assembly (8) surrounded by unbonded particulate media such as sand (6) in a flask (4). A gas permeable member (34, 70) or passage (72, 74) is provided between the sand and a vertical fill passage (20) to apply vacuum from the sand to the fill passage such that molten metal is vacuum lifted through the fill passage to the foam pattern assembly, such that the foam material vaporizes as the molten metal advances upward and is replaced by the metal in the shape of the pattern assembly.
摘要翻译： 一个失去泡沫的铸造系统（2）被提供有熔融金属（16）的真空升降到由烧瓶（4）中的未结合的颗粒介质如砂（6）包围的蒸发泡沫图案组件（8）。 透气构件（34,70）或通道（72,74）设置在沙子和垂直填充通道（20）之间，以从沙子向填充通道施加真空，使得熔融金属通过填充通道被真空提升 到泡沫图案组件，使得当熔融金属向上前进时，泡沫材料气化，并被图案组件形状的金属代替。
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10.发明授权Aluminum-silicon alloy having reduced microporosity and method for casting the same 有权具有降低的微孔的铝硅合金及其铸造方法公开(公告)号：US07347905B1
公开(公告)日：2008-03-25
申请号：US11174764
申请日：2005-07-05
IPC分类号： C22C21/04
摘要： An aluminum-silicon lost foam casting alloy having reduced microporosity and a method for casting the same is herein disclosed. A preferred lost foam cast alloy consists essentially of 6 to 12% by weight silicon and preferably 9.0 to 9.5% by weight silicon, 0.035-0.30% strontium, 0.40% maximum iron, 0.45% maximum copper, 0.49% maximum manganese, 0.60% maximum magnesium, 3.0% maximum zinc, and the balance aluminum. Most preferably, the lost foam alloy is free from iron, titanium and boron. However, such elements may exist at trace levels. Most preferably, the alloy is lost foam cast with the process that applies at least 10 atmospheres of pressure during solidification. However, the range may be 5 to 60 atmospheres. The strontium addition is greater than 0.005% by weight and most preferably greater than 0.05% by weight. In accordance with the present disclosure, alloys having substantially decreased tensile liquid failure defects and substantially decreased surface puncture defects in comparison to conventional lost foam cast aluminum silicon alloys are obtained. Further, hydrogen porosity formation is substantially completely suppressed and surface porosity defects are substantially decreased in comparison to conventional lost foam silicon alloys when casting lost foam cast alloys in accordance with the claims of the instant disclosure. The instant disclosure further discloses aluminum silicon alloys that may be utilized in both the lost foam with pressure and the die casting processes.
摘要翻译： 本文公开了具有降低的微孔性的铝硅损失泡沫铸造合金及其铸造方法。 优选的失去泡沫铸造合金基本上由6-12重量％的硅组成，优选的是硅，9.0- 9.5重量％的硅，0.035-0.30％的锶，0.40％的最大铁，最大铜的0.45％，最大锰的0.49％，最大的0.60％ 镁，3.0％最大锌，余量为铝。 最优选地，失去的泡沫合金不含铁，钛和硼。 然而，这些元素可以以痕量水平存在。 最优选的是，合金是在熔化过程中至少施加至少10个大气压的过程而失去的泡沫铸造。 然而，该范围可以是5至60个大气压。 锶添加量大于0.005重量％，最优选大于0.05重量％。 根据本公开，获得了与常规的失去泡沫铸造铝硅合金相比，具有显着降低的拉伸液体破坏缺陷和显着降低的表面穿孔缺陷的合金。 此外，根据本公开的权利要求，当铸造失去泡沫的铸造合金时，与常规的失去泡沫硅合金相比，基本上完全抑制了氢气孔隙形成，并且表面孔隙率缺陷显着降低。 本公开进一步公开了可以用于压力失去的泡沫和压铸工艺中的铝硅合金。
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