摘要:
To provide a heat exchanging fin capable of preventing cracks from forming in the flares of the collared tube holes, even if the metallic plate section is made of thin and tough material. In the heat exchanging fin, a metallic plate section has a plurality of tube holes. A plurality of collars are respectively extended from edges of the tube holes. A plurality of flares are respectively formed at front ends of the collars. Each flare includes a plurality of radially extended sections, which are radially outwardly extended from the front end of each collar. Furthermore, separation between the metallic plate section and each radially extended section is fixed.
摘要:
A twin drum-type continuous casting process for casting thin cast strip by solidifying molten steel continuously fed between a pair of cooling drums placed parallel to each other, wherein the cooling drums are given an added degree of concave crown such that a solid fraction at the thickness center of the thin cast strip, when the distance from the edges toward the center of the thin cast strip at the closest position of the cooling drums is within 50 mm, is exhibited which is a value greater than the fluid critical solid fraction, or alternatively the cooling rate near the edges of the cooling drums is improved.
摘要:
An induced plasma generating apparatus comprises: a seed gas supply unit for supplying a seed gas, a first chamber for receiving the seed gas: a DC current source; a pair of electrodes connected to the DC current source for causing a discharge in the first chamber to generate a plasma from the seed gas; a nozzle for ejecting the plasma from the first chamber; a second chamber for receiving the plasma ejected from the first chamber; an AC current source; and a coil connected to the AC current source and disposed to surround the second chamber for producing a magnetic field in the second chamber. An induced plasma is generated by subjecting plasma in the second chamber to the magnetic field.
摘要:
There have been provided hard-to-combustion property impartation agents for polyester fibers. The agent is prepared by dissolving an alkyl cyclohexane containing bromine atoms in a solvent and dripping the solution into a liquid to provide an emulsion or dispersion of alkyl cyclohexane containing bromine.