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    • 7. 发明申请
    • Method for repairing die cast dies
    • 修模模具的方法
    • US20070068648A1
    • 2007-03-29
    • US11238383
    • 2005-09-28
    • Yiping HuWilliam HehmannClyde Taylor
    • Yiping HuWilliam HehmannClyde Taylor
    • B22D19/10
    • B22D7/068B22D17/2209
    • Methods are provided for repairing a worn surface of a steel die-cast die. The method includes heating an amorphous material to a predetermined temperature with a laser beam and allowing the melted amorphous material to solidify to thereby form an amorphous layer over the worn surface. These processes are useful for eliminating or minimizing cracking and/or part distortion and minimize heat-affected zone during welding. In addition, the formation of an amorphous layer over the worn surface allows the repaired die-cast die to better withstand typical operating environments than previous repair materials. These methods combine low heat input welding with amorphous alloys to effectively repair die-cast dies.
    • 提供了用于修复钢模压模的磨损表面的方法。 该方法包括用激光束将非晶材料加热至预定温度,并使熔融的无定形材料固化,从而在磨损表面上形成非晶层。 这些方法对于消除或最小化开裂和/或部件变形以及使焊接期间的热影响区域最小化是有用的。 此外,在磨损表面上形成非晶层允许修复的压铸模具比以前的修补材料更好地承受典型的操作环境。 这些方法结合了低热输入焊接和非晶态合金,有效地修复了压铸模具。
    • 9. 发明授权
    • Method for replacing blade tips of directionally solidified and single
crystal turbine blades
    • 用于更换定向凝固和单晶涡轮叶片的叶片尖端的方法
    • US5822852A
    • 1998-10-20
    • US892034
    • 1997-07-14
    • Bernard Patrick BewlayMelvin Robert Jackson
    • Bernard Patrick BewlayMelvin Robert Jackson
    • B22D19/10B23K1/00B23P6/00C30B11/00F01D5/00F01D5/20B23P15/00
    • F01D5/20B22D19/10B23K1/0018B23P6/005C30B11/00C30B29/52F01D5/005B23K2201/001Y10T29/49318Y10T29/49339Y10T29/49737Y10T29/49742
    • A method for repairing a blade tip of a turbine blade of a gas turbine engine. The method is particularly directed to replacing the squealer tip (14) of a directionally solidified (DS) or single crystal (SX) turbine blade (10), and can be carried out using a brazing or welding technique. The method generally entails the step of machining the tip (14) to remove any damaged, worn, oxidized or eroded portions thereof sustained by the blade (10) during engine operation. A DS or SX superalloy replacement tip (18) is then placed on the surface generated by the machining operation. If a brazing operation is used, a brazing alloy composition (16) is first applied to the blade tip or replacement tip (18) prior to placement of the replacement tip (18). The brazing alloy composition (16) is composed of at least two alloys, one of which having a melting point lower than the recrystallization temperature and solvus temperature of the superalloy of the turbine blade (10), such that heating causes the brazing alloy composition (16) to flow and thereby join the replacement tip (18) to the blade tip of the turbine blade (10). Alternatively, if a welding operation is employed, the joining operation entails transmitting current through the turbine blade (10) and replacement tip (18) to resistance weld the replacement tip (18) to the blade tip of the blade (10).
    • 一种用于修复燃气涡轮发动机的涡轮叶片的叶片尖端的方法。 该方法特别涉及更换定向凝固(DS)或单晶(SX)涡轮叶片(10)的尖叫尖端(14),并且可以使用钎焊或焊接技术进行。 该方法通常需要加工尖端(14)以消除在发动机操作期间由叶片(10)持续的任何损坏,磨损,氧化或侵蚀的部分的步骤。 然后将DS或SX超合金替代头(18)放置在由加工操作产生的表面上。 如果使用钎焊操作,则在放置替换刀片(18)之前,首先将钎焊合金组合物(16)施加到刀片尖端或替换刀片(18)。 钎焊合金组合物(16)由至少两种合金组成,其中一种熔点低于涡轮叶片(10)的超合金的再结晶温度和溶解温度,使得加热导致钎焊合金组成( 16)流动,从而将更换的尖端(18)连接到涡轮叶片(10)的叶片尖端。 或者,如果采用焊接操作,则接合操作需要传递电流通过涡轮叶片(10)和更换尖端(18),以将替换尖端(18)电阻焊接到叶片(10)的叶片尖端。
    • 10. 发明授权
    • Solidification of an article extension from a melt using an integral
mandrel and ceramic mold
    • 使用一体式心轴和陶瓷模具从熔体固化制品延伸
    • US5676191A
    • 1997-10-14
    • US669793
    • 1996-06-27
    • Bernard Patrick BewlayMelvin Robert JacksonAnn Melinda RitterWayne Alan DemoStephen Joseph Ferrigno
    • Bernard Patrick BewlayMelvin Robert JacksonAnn Melinda RitterWayne Alan DemoStephen Joseph Ferrigno
    • F01D5/18B22D19/00B22D19/10B22D27/04F01D5/28B22D23/06
    • B22D19/10C30B11/00C30B29/52Y10T29/49318
    • An extension is formed directly on an article by dipping a portion or end of the article having an attached integral mandrel into a molten bath of a compatible alloy, followed by withdrawal of the end under controlled conditions sufficient to cause an integral extension to solidify on the article. A ceramic mold is utilized over the dipped end of the article and the integral mandrel with a mold cavity that generally defines the shape of the extension to be formed. The mold may be formed in situ on the mandrel, or preformed and attached to the subject article over the mandrel. The integral mandrel is melted within the mold by dipping the mandrel into the molten alloy. The mandrel acts as a buffer between the molten material and the article while permitting melting of the article end and solidification of the integral extension. Extensions formed by the method of this invention have a microstructure that is continuous and compatible with that of the article. Such microstructures may include epitaxial growth of the extension from the microstructure of the article. The method establishes a temperature gradient within the article during solidification that may be further controlled by auxiliary heating and/or cooling of the article and/or extension during the practice of the method.
    • 通过将具有附接的整体心轴的制品的一部分或端部浸入相容合金的熔池中,直接在制品上形成延伸部,然后在足以引起整体延伸固化的受控条件下将端部取出 文章。 陶瓷模具被利用在制品的浸入端上,并且整体心轴具有通常限定待形成的延伸部的形状的模腔。 模具可以在心轴上原位形成,或者通过心轴预成型并附着到主体制品上。 通过将心轴浸入熔融合金中,整体心轴在模具内熔化。 心轴作为熔融材料和制品之间的缓冲液,同时允许制品端部熔化并且整体延伸部分的固化。 通过本发明的方法形成的延伸部具有与制品的连续且兼容的微结构。 这种微结构可以包括从制品的微观结构延伸的外延生长。 该方法在固化期间在制品内建立温度梯度,其可以在该方法的实践期间通过辅助加热和/或冷却制品和/或延伸来进一步控制。