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1. 发明授权

EP0427392B1 Improved method of casting a reactive metal against a surface formed from an improved slurry containing yttria 失效
标题翻译：一种用于其制备含有氧化钇淤泥的表面上铸造活性金属的方法。
公开(公告)号：EP0427392B1
公开(公告)日：1995-05-17
申请号：EP90310844.7
申请日：1990-10-04
申请人： PCC Airfoils, Inc.
发明人： Horton, Robert A.
IPC分类号： B22C3/00
CPC分类号： B22C1/06 , C04B35/505 , C04B35/6263 , C04B35/6316 , C04B2235/3201 , C04B2235/3203 , C04B2235/3418 , C04B2235/5436

2. 发明公开

EP0427392A2 Improved method of casting a reactive metal against a surface formed from an improved slurry containing yttria 失效
标题翻译：一种用于其制备含有氧化钇淤泥的表面上铸造活性金属的方法。
公开(公告)号：EP0427392A2
公开(公告)日：1991-05-15
申请号：EP90310844.7
申请日：1990-10-04
申请人： PCC Airfoils, Inc.
发明人： Horton, Robert A.
IPC分类号： B22C3/00
CPC分类号： B22C1/06 , C04B35/505 , C04B35/6263 , C04B35/6316 , C04B2235/3201 , C04B2235/3203 , C04B2235/3418 , C04B2235/5436
摘要： Reactive metals such as titanium and nickel-chrome superalloys containing rare earths, are cast with mold and/or core surface areas formed from an improved slurry. The improved slurry contains yttria to form an inert surface which is exposed to the molten reactive metal. In order to prevent premature gelation of the slurry, the forming of defects in the mold and/or core surface areas, and the forming of defects in the cast article, the slurry contains a source of hydroxyl ions sufficient to result in the slurry having a pH of at least 10.2 six days after initially mixing the slurry. The source of hydroxyl ions may be an alkali metal or an organic hydroxide. The source of hydroxyl ions is believed to function as a hydration suppressant for the yttria to prevent premature gelation of the slurry. The slurry preferably contains a silica to alkali ratio which is equivalent to a silica to sodium oxide (Na₂O) dry weight ratio of less than 30:1.
摘要翻译：反应性金属：例如钛和镍 - 铬高温合金含稀土，都铸有模具和/或从改善浆料而形成芯的表面积。改进的浆液含有氧化钇，以形成惰性表面上的所有的暴露于所述熔融金属的反应性。为了防止浆料的过早凝胶化，则在模具和/或芯表面区域中的缺陷形成，并且在铸造制品的缺陷的形成，所述浆料含有羟基的源的离子足以导致具有所述浆料 INITIALLY混合浆料后的至少10.26天pH值。氢氧根离子源可以是碱金属或有机氢氧化物的。氢氧根离子的来源据信作为水合抑制剂发挥作用的氧化钇，以防止料浆的过早胶凝。该浆料优选含有二氧化硅与碱比所有其等同于的二氧化硅与氧化钠（Na 2 O）小于30干重量比第一

3. 发明公开

EP0427392A3 Improved method of casting a reactive metal against a surface formed from an improved slurry containing yttria 失效
标题翻译：改进含有YTTRIA的改进浆料形成的表面反应性金属的改进方法
公开(公告)号：EP0427392A3
公开(公告)日：1992-10-28
申请号：EP90310844.7
申请日：1990-10-04
申请人： PCC Airfoils, Inc.
发明人： Horton, Robert A.
IPC分类号： B22C3/00
CPC分类号： B22C1/06 , C04B35/505 , C04B35/6263 , C04B35/6316 , C04B2235/3201 , C04B2235/3203 , C04B2235/3418 , C04B2235/5436
摘要： Reactive metals such as titanium and nickel-chrome superalloys containing rare earths, are cast with mold and/or core surface areas formed from an improved slurry. The improved slurry contains yttria to form an inert surface which is exposed to the molten reactive metal. In order to prevent premature gelation of the slurry, the forming of defects in the mold and/or core surface areas, and the forming of defects in the cast article, the slurry contains a source of hydroxyl ions sufficient to result in the slurry having a pH of at least 10.2 six days after initially mixing the slurry. The source of hydroxyl ions may be an alkali metal or an organic hydroxide. The source of hydroxyl ions is believed to function as a hydration suppressant for the yttria to prevent premature gelation of the slurry. The slurry preferably contains a silica to alkali ratio which is equivalent to a silica to sodium oxide (Na₂O) dry weight ratio of less than 30:1.

4. 发明公开

EP0149887A2 Apparatus and method for casting single crystal articles 失效
标题翻译：用于铸造单晶制品的方法和装置。
公开(公告)号：EP0149887A2
公开(公告)日：1985-07-31
申请号：EP84307282.8
申请日：1984-10-23
申请人： PCC Airfoils, Inc.
发明人： Horton, Robert A. , Jayaraman, Gowri S.
IPC分类号： B22D27/04
CPC分类号： B22D27/045
摘要： An apparatus for casting doubly oriented single crystal airfoils and similar articles includes a mold having an orientation selector which selects crystals having desired vertical and horizontal orientations. The orientation selector includes an upright primary growth passage having a lower end exposed to the upper side surface of a chill plate. A horizontal secondary growth passage is connected with the upper end of the primary growth passage and with the mold cavity. A gradient inducing passage is connected with the upper end of the primary growth passage and has a lower end exposed to the chill plate to promote the transmission of heat from the upper end of the primary growth passage to the chill plate after metal crystals have solidified in the gradient inducing growth passage.

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