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1. 发明授权

US5023050A Superalloy for high-temperature hydrogen environmental applications 失效
标题翻译：高温合金用于高温氢环境应用
公开(公告)号：US5023050A
公开(公告)日：1991-06-11
申请号：US425904
申请日：1989-10-24
申请人： Eugene C. McKannan , William B. McPherson , Shaffiq Ahmed , Shirley S. Chandler
发明人： Eugene C. McKannan , William B. McPherson , Shaffiq Ahmed , Shirley S. Chandler
IPC分类号： C22C19/05
CPC分类号： C22C19/056
摘要： A nickel-based superalloy is provided which is resistant to deterioration in hydrogen at high operating temperatures and pressures, and which thus can be used in hydrogen-fueled spacecraft such as the Space Shuttle. The superalloy is characterized by a two-phase microstructure and consists of a gamma-prime precipitated phase in a gamma matrix. The gamma matrix phase is a primary solid solution and the gamma precipitated phase will be an intermetallic compound of the type A.sub.3 B, such as nickel aluminide or titanide. Both phases are coherent, ordered, and compatible, and thus will retain most of their strength at elevated temperatures. The alloy consists essentially of (by weight):______________________________________ Ni 50-60% Cr 10-20% Al 2-6% Co 2-5% Ti 3-8% W 5-12% Mo 5-10% Nb 1-3% ______________________________________ wherein the ratio W/MO is approximately equal to 1, and Ti/Al ranges from about 1 to about 2.
摘要翻译：提供了一种镍基超级合金，其在高操作温度和压力下耐氢劣化，因此可用于诸如航天飞机的氢燃料航天器。超合金的特征在于两相微结构，由γ基质中的γ'析出相组成。 γ基质相是主要固溶体，γ析出相将是A3B型金属间化合物，例如铝化镍或钛酸铅。两相是连贯的，有序的和兼容的，因此在高温下将保持大部分的强度。该合金基本上由（重量）组成：-Ni 50-60％-Cr 10-20％-Al 2-6％-Co 2-5％-Ti 3-8％-W 5-12％-Mo 5- 10％-Nb 1-3％ - 其中W / MO的比率近似等于1，Ti / Al在约1至约2的范围内。

2. 发明授权

US5080726A Directional solidification processing of alloys using an applied electric field 失效
标题翻译：使用施加电场的合金的定向凝固加工
公开(公告)号：US5080726A
公开(公告)日：1992-01-14
申请号：US531375
申请日：1990-05-31
申请人： Eugene C. McKannan , Deborah D. Schmidt , Shaffiq Ahmed , Robert W. Bond
发明人： Eugene C. McKannan , Deborah D. Schmidt , Shaffiq Ahmed , Robert W. Bond
IPC分类号： C30B11/00
CPC分类号： C30B11/00 , C30B29/52
摘要： A method is provided for obtaining an alloy having an ordered microstructure which comprises the steps of heating the central portion of the alloy under uniform temperature so that it enters a liquid phase while the outer portions remain solid, applying a constant electric current through the alloy during the heating step, and solidifying the liquid central portion of the alloy by subjecting it to a temperature-gradient zone so that cooling occurs in a directional manner and at a given rate of speed while maintaining the application of the constant electric current through the alloy. The method is particularly suitable for use with nickel-based superalloys. The method of the present invention produces an alloy having superior characteristics such as reduced segregation. After subsequent precipitation by heat-treatment, the alloys produced by the present invention will have excellent strength and high-temperature resistance.
摘要翻译：提供了一种获得具有有序微观结构的合金的方法，该合金包括以下步骤：在均匀温度下加热合金的中心部分，使其进入液相，同时外部部分保持固体，在该合金中施加恒定电流通过合金加热步骤，通过使合金的液体中心部分经受温度梯度区域的固化，使得在保持施加通过合金的恒定电流的同时以定向和给定的速度进行冷却。该方法特别适用于镍基超级合金。本发明的方法生产出具有优异特性的合金，例如减少的偏析。在通过热处理随后的沉淀之后，本发明生产的合金具有优异的强度和耐高温性。

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