Hardfacing of gamma titanium aluminides
    21.
    发明授权
    Hardfacing of gamma titanium aluminides 失效
    γ钛铝化物的表面硬化

    公开(公告)号:US5910376A

    公开(公告)日:1999-06-08

    申请号:US775649

    申请日:1996-12-31

    申请人: Thomas J. Kelly

    发明人: Thomas J. Kelly

    摘要: A gamma titanium aluminide substrate is hardfaced by providing a hardfacing material with a titanium-aluminum, gamma-titanium aluminide alloy component having a composition of titanium and about 42 to about 49 atomic percent aluminum, and a nonmetallic powder, such as titanium diboride. This hardfacing material is preferably furnished as a hardfacing alloy source in the form of a hollow tube of metallic titanium tube material, and a filler powder within the hollow tube. The filler powder is a filler mixture of an aluminum-containing alloy powder comprising more than about 50 atomic percent aluminum, and the nonmetallic powder. The relative proportions of the titanium tube material and the aluminum-containing alloy powder are such that their net composition is a gamma phase titanium aluminide composition. The hardfacing material is applied to the substrate, as by a welding process.

    摘要翻译: 通过提供具有组成为钛和约42至约49原子%的铝的钛 - 铝,γ-钛铝化物合金组分和非金属粉末,例如二硼化钛,提供耐硬面材料来硬化。 这种表面硬化材料优选作为金属钛管材料的中空管形式的硬质合金源和中空管内的填料粉末提供。 填料粉末是包含大于约50原子%铝的含铝合金粉末和非金属粉末的填料混合物。 钛管材料和含铝合金粉末的相对比例使得其净组成为γ相钛化铝组合物。 通过焊接工艺将表面硬化材料施加到基底上。

    Low-porosity gamma titanium aluminide cast articles and their preparation
    22.
    发明授权
    Low-porosity gamma titanium aluminide cast articles and their preparation 失效
    低孔隙度γ钛化铝铸造制品及其制备

    公开(公告)号:US5823243A

    公开(公告)日:1998-10-20

    申请号:US775700

    申请日:1996-12-31

    申请人: Thomas J. Kelly

    发明人: Thomas J. Kelly

    IPC分类号: B22D27/20

    CPC分类号: B22D27/20

    摘要: The inside surface of the mold used to cast gamma titanium aluminide articles is pretreated with a facecoating of an inoculant such as titanium diboride or titanium carbide. When the molten metal of the composition that produces the gamma titanium aluminide is cast into the mold, the facecoating nucleates grains at the surface of the casting, which inhibits the formation of surface-connected porosity in the casting. Subsequent hot isostatic pressing of the article produces a sounder article than otherwise could be achieved.

    摘要翻译: 用于浇铸γ钛化铝制品的模具的内表面用诸如二硼化钛或碳化钛的孕育剂的面罩进行预处理。 当产生γ钛化铝的组合物的熔融金属被浇铸到模具中时,面涂层在铸件的表面成核晶粒,这抑制了铸件中表面连接孔隙的形成。 随后对该物品进行热等静压,产生比另外可实现的更好的物品。

    Tantalum-containing superalloys
    23.
    发明授权
    Tantalum-containing superalloys 失效
    含钽超级合金

    公开(公告)号:US5207846A

    公开(公告)日:1993-05-04

    申请号:US658417

    申请日:1991-02-19

    申请人: Thomas J. Kelly

    发明人: Thomas J. Kelly

    IPC分类号: C22C1/10 C22C19/05

    摘要: Nickel base superalloys which contain niobium (columbium) to promote gamma double prime strengthening are improved by replacing the niobium with tantalum on an atom-for-atom basis and then heat treating the new alloy at temperatures in excess of those conventionally used for superalloys which include niobium. The resultant tantalum-bearing alloys are found to exhibit increased strength and greater phase stability than corresponding niobium-bearing alloys.

    摘要翻译: 通过用以原子为原子的钽代替铌,然后在超过常规用于超级合金的温度下对新合金进行热处理,来改善含有铌(铌)以促进γ双原子强化的镍基超级合金,其包括 铌。 发现所得的含钽合金比相应的含铌合金显示出更强的强度和更大的相稳定性。

    Method for controlling east/west motion of a geostationary satellite
    24.
    发明授权
    Method for controlling east/west motion of a geostationary satellite 失效
    控制地球卫星东/西运动的方法

    公开(公告)号:US5124925A

    公开(公告)日:1992-06-23

    申请号:US464799

    申请日:1990-01-16

    IPC分类号: B64G1/24 B64G1/34 G05D1/08

    CPC分类号: B64G1/24 G05D1/0883 B64G1/34

    摘要: A method for East/West stationkeeping of a geostationary satellite maintains the osculating value of longitude from exceeding a specified deadband for a specified drift period between maneuvers. In the planning, the mean longitude, the mean drift rate and the mean eccentricity vector are calculated and then maneuvers are executed to maintain the values below a magnitude such that the osculating longitude will be within the specified deadband over a specified drift period. The target conditions are achieved through a plurality of maneuvers which initiate a period of free drift which lasts for a specified number of days. During the free-drift period, longitude remains within its deadband, and no additional maneuvers are needed or are performed. The method has the advantage that it can take into account limitations on thruster on-time by allowing for a generalized number of stationkeeping maneuvers.

    Process for reducing dichlorobutene contamination in aqueous plant wastes
    27.
    发明授权
    Process for reducing dichlorobutene contamination in aqueous plant wastes 失效
    降低植物废水中二氯丁烯污染的方法

    公开(公告)号:US4221659A

    公开(公告)日:1980-09-09

    申请号:US24599

    申请日:1979-03-28

    CPC分类号: C02F1/26 C02F2101/36

    摘要: Chlorinated organic compounds from the aqueous waste streams from a process for manufacturing and isomerizing dichlorobutenes and dehydrochorinating 3,4-dichlorobutene-1 to chloroprene, which is the principal monomer in the manufacture of neoprene rubber, are removed by means of a process, wherein the aqueous waste from the dichlorobutene-isomerization step and brine formed in the dehydrochlorination step are combined to produce an aqueous solution containing about 1-5% sodium chloride and the solution, while maintained at a pH of less than about 6, is extracted with a small amount of a liquid hydrocarbon. The liquid hydrocarbon extract is then incinerated, while the extracted aqueous solution is discharged into a natural body of water. In this way, the level of 1,4-dichlorobutene-2, which is toxic to fish, in the natural body of water can be maintained at a safe level.

    摘要翻译: 来自制造和异构化二氯丁烯的方法的废水中的氯化有机化合物和作为氯丁橡胶制造中主要单体的3,4-二氯丁烯-1脱氯化氢氯丁二烯的方法通过以下方法除去,其中 合并二氯丁烯异构化步骤的废水和在脱氯化氢步骤中形成的盐水合并产生含有约1-5%氯化钠的水溶液,同时保持pH小于约6的溶液用小 液体烃的量。 然后将液体烃提取物焚烧,同时将提取的水溶液排放到天然水体中。 以这种方式,在天然水体中对鱼有毒的1,4-二氯丁烯-2的水平可以保持在一个安全的水平。

    Heat treatment of gamma titanium aluminide alloys
    30.
    发明授权
    Heat treatment of gamma titanium aluminide alloys 失效
    γ钛铝合金的热处理

    公开(公告)号:US06231699B1

    公开(公告)日:2001-05-15

    申请号:US08262168

    申请日:1994-06-20

    IPC分类号: C22F118

    CPC分类号: C22C14/00 C22F1/183

    摘要: A gamma titanium aluminide alloy article, is prepared using a piece of a gamma titanium aluminide alloy having a composition capable of forming alpha, alpha-2, and gamma phases. The alpha transus temperature of the gamma titanium aluminide alloy piece is determined. The gamma titanium aluminide alloy piece is consolidated by hot isostatic pressing at a temperature of from about 50 F. to about 250 F. below the alpha transus temperature and at a pressure of from about 10,000 to about 30,000 pounds per square inch, for a duration of from about 1 to about 20 hours. The piece is heat treated at a temperature of from about 5 F. to about 300 F. below the alpha transus temperature for a time sufficient to refine the microstructure and generate a microstructure comprising from about 10 to about 90 volume percent gamma phase. The step of heat treating is conducted at a temperature of from about 45 F. to about 200 F. above the temperature of the step of hot isostatic pressing.

    摘要翻译: 使用一片具有能够形成α,α-2和γ相的组成的γ钛铝化合物合金来制备γ钛铝化物合金制品。 确定γ钛铝化合物片的α转变温度。 γ钛铝化合物片通过热等静压在约50°F至约250°F的温度下固化,低于α转换温度,压力为约10,000至约30,000磅/平方英寸,持续一段时间 为约1至约20小时。 将该片在低于α转换温度的约5°F至约300°F的温度下进行热处理足以精炼微结构并产生包含约10至约90体积%γ相的微结构的时间。 热处理步骤在比热等静压的步骤温度高约45°F至约200°F的温度下进行。