摘要:
An article, made of a material such as a iron-nickel-base alloy, is weld repaired, and then heat treated. The heat treatment includes heating the weld-repaired portion to a first hold temperature of at least about 1775 degrees Fahrenheit, cooling the weld-repaired portion to a temperature of 1025 degrees Fahrenheit or less, heating the weld-repaired portion at a rate of at least about 10 degrees Fahrenheit per minute or greater, to a second hold temperature of at least about 1525 degrees Fahrenheit, cooling the weld-repaired portion to a third hold temperature of about 1425 degrees Fahrenheit or less, and cooling the weld-repaired portion to a fourth hold temperature of about 1225 degrees Fahrenheit or less.
摘要:
A heating apparatus and method for pre-weld heat treating, welding and post-weld heat treating a superalloy article in a single enclosure while avoiding oxidation of the article. The enclosure is preferably equipped with a one-way valve that permits the escape of gases, but otherwise seals the enclosure to prevent the ingress of air during welding and heat treatment as a result of thermal gradients induced when the article is inductively heated. To provide access to the article and a device used to weld the article, the enclosure is equipped with gloves by which the welding device and the article can be manipulated while a nonreactive atmosphere is fully maintained within the enclosure and the article is inductively heating.
摘要:
An as-cast gamma titanium-aluminide alloy, typically having a composition of from about 45.0 to about 48.5 atomic percent aluminum, is pre-HIP heat treated at a temperature of from about 1900.degree. F. to about 2100.degree. F. for a time of from about 50 to about 5 hours. The gamma titanium-aluminide alloy is thereafter hot isostatically pressed at a temperature of about 2200.degree. F. Hot isostatic pressing is preferably followed by a further heat treatment at a temperature of about 1850.degree.-2200.degree. F.
摘要:
A gamma titanium aluminide alloy is provided, based on the intermetallic compound TiAl, in which the resulting alloy is characterized by high creep strength and environmental resistance at elevated temperatures in excess of about 650.degree. C., and as high as about 850.degree. C. The alloy achieves these desirable properties through limited and interrelated additions of chromium, niobium and tantalum, whose combined amount is established by a minimum amount necessary to achieve a desired level of oxidation resistance.
摘要:
A portable tie holder which has a rectangular base and a plurality of movable arms for accommodating ties and like garments. Each arm includes a generally U-shaped rod having an axial end and a lateral end. Hinges are operatively associated with the axial ends of the arms allowing the arms to pivot relative the base. Locks mounted on the base releasably hold the lateral ends of the arms to locate the arms adjacent the base. A hook is mounted on the base whereby the holder may be hung on a fixture.
摘要:
Apparatus and method for laser welding in a controllably pure gaseous environment at sub-atmospheric as well as high pressures. A workpiece to be welded is contained within a vessel having a light transmitting means which allows passage of a laser beam into the vessel. A gas stream is introduced to the vessel through a gas inlet means and positioned so that the stream deflects ionized particles from impinging on the light transmitting means. The gas stream simultaneously serves to cool the light transmitting means. Weld debris and spent gas are exhausted through a gas exhaust means which preferably is located adjacent to the workpiece. The apparatus is particularly suited to the laser welding of oxide dispersion strengthened alloys.
摘要:
The invention provides compounds, methods, pharmaceutical compositions, and kits for the treatment of proliferative disorders such as cancer. In one aspect, the methods comprise compounds that inhibit the activity of protein kinases, such as cell division cycle (Cdc) kinase. In another aspect, the methods comprise compounds that inhibit Cdc7 and/or Dbf4 activity. In another aspect, the methods comprise compounds that exhibit anti-proliferative properties useful in treating diseases such as cancer. Compounds useful for any of the methods include compounds of the Formula (A) or (B) or pharmaceutically acceptable salts thereof. Exemplary compounds of Formula (A) or (B) include granaticin A, granaticin B, dihydrogranaticin A, dihydrogranaticin B, medermycin, and actinorhodin.
摘要:
A policy distribution server provides, on a subscription basis, policy updates to effect desired behaviors of network intermediary devices. The policy updates may specify caching policies, and may in some instances, include instructions for data collection by the network intermediary devices. Data collected in accordance with such instructions may be used to inform future policy updates distributed to the network intermediary devices.
摘要:
A caching device is configured to determine whether an object received or currently stored at the caching device should be (or continue to be) cached at the caching device, even if the object is otherwise cacheable. If so, the object is cached (or retained) at the caching device, otherwise, it is not. The determination as to whether or not the object should be cached or, if already cached, retained at the caching device may be made on the basis of a worthiness determination which evaluates the object on the basis of one or more parameters or attributes of the object, which worthiness may be one part of an overall value determination for the object.