公开(公告)号：WO1996013622A1

公开(公告)日：1996-05-09

申请号：PCT/US1995014629

申请日：1995-10-26

Applicant: HOWMET CORPORATION

Inventor： HOWMET CORPORATION ,  WARNES, Bruce, M. ,  PUNOLA, David, C. ,  BASTA, William, C.

IPC: C23C16/06

CPC classification number: F01D5/288 ,  C23C10/02 ,  C23C10/14 ,  C23C16/12

Abstract: A method of improving the oxidation resistance of a platinum modified aluminide coating formed on a nickel base superalloy substrate, comprises providing a platinum layer on the substrate, heating the substrate in a coating retort to a temperature of at least about 1000 DEG C, forming external of the coating retort a high purity coating gas comprising hydrogen and aluminum trichloride, and introducing the coating gas into the coating retort to contact the heated substrate to form an outwardly grown, single phase [(Ni,Pt)Al] platinum modified aluminide coating having reduced concentration of at least one of a substrate substitutional alloying element and a surface active tramp element selected from at least one of B, P, and S in said coating as compared to a platinum modified aluminide coating formed at a lower temperature.

Abstract translation: 一种提高在镍基超合金基底上形成的铂改性铝化物涂层的抗氧化性的方法，包括在基材上提供铂层，将涂层蒸煮中的基材加热到至少约1000℃的温度，形成外部 的涂层将包含氢和三氯化铝的高纯度涂层气体蒸煮，并将涂覆气体引入涂层蒸馏器中以接触被加热的底物以形成向外生长的单相[（Ni，Pt）Al]铂改性铝化物涂层，其具有 与在较低温度下形成的铂改性铝化物涂层相比，在所述涂层中选自B，P和S中的至少一种中的至少一种衬底替代合金元素和表面活性杂质元素的浓度降低。

公开(公告)号：WO1995022423A1

公开(公告)日：1995-08-24

申请号：PCT/US1994001596

申请日：1994-02-22

Applicant: HOWMET CORPORATION

Inventor： HOWMET CORPORATION ,  COLVIN, Gregory, N. ,  ERVIN, Leonard, L. ,  JOHNSON, Robert, F.

IPC: B22C09/06

CPC classification number: B22C9/061 ,  B22D18/04 ,  B22D18/06 ,  B22D21/005 ,  B22D21/025

Abstract: Titanium based and nickel based castings are made by casting a suitable melt having a relatively low melt superheat into a mold cavity (13) defined by one or more low carbon steel or titanium mold members where the melt solidifies to form the desired casting. The melt superheat is limited so as not to exceed about 150 DEG F above the liquidus temperature of the particular melt being cast. For a steel mold (10), one or more titanium melt inlet-forming members (14) are provided for cooperating with the steel mold members (12) to form a melt ingate (18) that communicates to the mold cavity for suppliyng the melt thereto in a manner to avoid harmful iron contamination of the melt during casting. The mold body-to-mold cavity volume ratio is controlled between 10:1 to 0.5:1 to minimize casting surface defects and mold wear/damage.

Abstract translation: 钛基和镍基铸件通过将具有相对低的熔体过热的合适的熔体浇铸到由一种或多种低碳钢或钛模具构件限定的模腔（13）中来制造，其中熔体固化以形成所需的铸件。 熔体过热受到限制，不应超过特定熔体熔体的液相线温度超过150°F。 对于钢模具（10），设置有一个或多个钛熔体入口成形构件（14），用于与钢模具构件（12）配合以形成熔体浇口（18），其与模腔连通以供应熔体 以避免铸造期间熔体的有害铁污染。 模具体对模腔体积比控制在10：1至0.5：1之间，以最大限度地减少铸件表面缺陷和模具磨损/损坏。

公开(公告)号：WO1997027016A1

公开(公告)日：1997-07-31

申请号：PCT/US1997001437

申请日：1997-01-23

Applicant: HOWMET CORPORATION

Inventor： HOWMET CORPORATION ,  PURVIS, Andrew, L. ,  HANSLITS, Christopher, R. ,  DIEHM, Randall, S.

IPC: B22D25/06

CPC classification number: B22D46/00 ,  B22D27/045

Abstract: A method of predicting a grain condition in a directionally solidified casting, comprises generating thermal history data for a directional solidification casting process, determining a plurality of casting process variables that statistically influence a plurality of different grain conditions, identifying each grain condition by determining a function containing values of each selected variable, and categorizing the selected variables with respect to variance among and between the different grain conditions to determine a pattern between the selected variable and the grain conditions.

Abstract translation: 一种在定向凝固铸件中预测晶粒状况的方法包括产生定向凝固铸造工艺的热历史数据，确定统计上影响多个不同晶粒条件的多个铸造工艺变量，通过确定功能来识别每个晶粒状态 包含每个选定变量的值，并且根据不同粒度条件之间和之间的差异对所选变量进行分类，以确定所选变量与谷物条件之间的模式。

公开(公告)号：WO1996006699A1

公开(公告)日：1996-03-07

申请号：PCT/US1995010689

申请日：1995-08-14

Applicant: HOWMET CORPORATION

Inventor： HOWMET CORPORATION ,  THOMPSON, Dennis, J.

IPC: B22D02/00

CPC classification number: B22D27/045 ,  B22D2/006

Abstract: A thermocouple positioning device (50) is provided for a directional solidification casting apparatus having a furnace (10) for receiving a mold (20a) disposed on a chill plate (30) which is carried on a movable ram (40). The thermocouple positioning device (50) comprises a support bracket (52) disposed on the ram (40) for movement therewith. The bracket (52) includes an upstanding slide member (62) and a slideway member (64) disposed on the slide member (62) and having a thermocouple holder (86) thereon. A stop member (112) is disposed in fixed position below the furnace (10) for releasably engaging a stop engaging member (100) on the slideway member (64) as the ram (40) is raised to position the mold (20a) in the furnace (10). Engagement between the stop member (112) and the stop engaging member (100) as the ram (40) is raised positions the thermocouple (92) in a temperature sensing position relative to the mold (20a). The thermocouple (92) remains at the temperature sensing position as the mold (20a) is withdrawn from the furnace (10) to effect directional solidification.

Abstract translation: 提供了一种用于定向凝固铸造设备的热电偶定位装置（50），其具有用于容纳设置在可运动的冲头（40）上的冷却板（30）上的模具（20a）的炉（10）。 热电偶定位装置（50）包括设置在冲头（40）上以与其一起运动的支撑托架（52）。 支架（52）包括直立滑动构件（62）和设置在滑动构件（62）上并且在其上具有热电偶保持器（86）的滑动构件（64）。 停止构件（112）设置在炉子（10）下方的固定位置，用于随着冲头（40）升高以将模具（20a）定位在内部，以可释放地接合滑道构件（64）上的止动接合构件（100） 炉（10）。 作为冲头（40）的止动构件（112）和止动接合构件（100）之间的接合将使热电偶（92）相对于模具（20a）位于温度感测位置。 当模具（20a）从炉子（10）中取出时，热电偶（92）保持在温度检测位置，以实现定向凝固。