Abstract:
The present invention provides a method for heat-treating seam-welded constructions of hardenable steel and ferrous alloys with reduced weld-zone hardness and improved weld-zone ductility and toughness. This method consists of heating the seam weld rapidly with a secondary heat source to a temperature greater than the martensitic start temperature but not greater than the lower critical temperature, followed by immediately allowing the seam weld to air-cool. The rapid tempering of this invention is particularly suited to the production of high strength hardenable alloy seam-welded pipe and tubing and other structures.
Abstract:
An integrated welding and thermal processing method includes heating adjoining surfaces, at least one of which is a creep strength enhanced ferritic (CSEF) steel alloy, to a sufficiently high temperature above their melting points to form a weld. The weld is allowed cool below the martensitic start temperature of one or both CSEF alloys. Thereafter, a supplemental heat source tempers the CSEF alloys by reheating the weld area at a rate of 10° C. per second or greater to above the CSEF alloys' martensitic start temperatures, but not above the austenitization temperature of the CSEF alloys. After the weld's heat affected zone is maintained at a temperature between the CSEF alloys' martensitic finish temperature and martensitic start temperature, the weld is allowed to cool at a rate of 15° C. per minute or greater.
Abstract:
A user-initiated fluid pathway connection 300 includes: a connection hub 310, a piercing member 330, a sterile sleeve 320, and a drug container 50 having a cap 52, a pierceable seal 56, a barrel 58, and a plunger seal 60, wherein the piercing member 330 is initially retained within the sterile sleeve 320 between the connection hub 310 and the pierceable seal 56 of the drug container 50. The connection hub 3310 may include an internal aperture 3310D within the connection hub 3310 which functions as a flow restrictor and wherein a piercing member 3330 is connected to one end of the internal aperture 3310D and a fluid conduit 3030 is connected to another end of the internal aperture 3310D. A drug delivery pump 10 with integrated sterility maintenance features includes a housing 12, upon which an activation mechanism 14, an insertion mechanism 200, a fluid pathway connection 300 as described above, a power and control system 400, and a drive mechanism 100 connected to a drug container 50 are mounted. Methods of assembly and operation are also provided.
Abstract:
Systems and methods for concentrating and storing solar energy are provided. A solar energy receiver for use with the systems and methods may include a container for holding a solar absorption material, such as a phase change material, and a cooled cover disposed above the container for condensing and collecting vaporized phase change material collected along an underside of the cover.
Abstract:
The present invention provides a method for welding and heat-treating seam- welded constructions of hardenable steel and ferrous alloys with reduced weld-zone hardness and improved weld-zone ductility and toughness. This method consists of controlling the cooling rate of the seam weld with a secondary heat source, applied after the weld cools below the materials upper critical temperature (A C3 ), but prior to the weld cooling to ambient temperature. This invention is particularly suited to the production of high strength hardenable alloy seam- welded pipe and tubing.
Abstract:
Systems and methods for concentrating and storing solar energy are provided. A solar energy receiver for use with the systems and methods may include a container for holding a solar absorption material, such as a phase change material, and a cooled cover disposed above the container for condensing and collecting vaporized phase change material collected along an underside of the cover.