摘要:
In order to provide a current fuse with high solderability without containing harmful materials, solder chips containing 30 to 60 percent by weight of zinc, 0.1 to 2 percent by weight of copper, 0.1 to 1 percent by weight of nickel, and the remainder percent by weight being tin, or further containing 0.01 to 0.5 percent by weight of aluminum are inserted into the interior of the electrodes before pressing the electrodes into the ends of the substrate of the fuse, the exterior of the electrodes is heated to melt the solder chips, thereby connecting between the electrodes and the fuse wire.
摘要:
The alloy is free from cadmium and it contains 0.001-1% In, 0.005-1% Mn and possibly up to 1% Pb, 0.005-1% Al and/or 0.0005-0.1% REM, REM being a rare earth metal or a mixture of rare earth metals. These alloys have a sufficient mechanical strength and resistance to corrosion and are easy to be processed.
摘要:
In a method for transmitting force from one piston to another piston, a superplastic alloy is used between the pistons as a pressure transmitting medium. An apparatus adopting the method serves as a force multiplication apparatus.
摘要:
A rotatable device is suspended in a melt of zinc and the device is rotated to draw a vortex in the melt. The device comprises a hollow cylinder having an open top and a closed bottom. An array of openings in the cylinder side wall is adapted to allow zinc melt to pass through. Nickel is added in particulate form into the vortex in the device. The openings in the cylindrical wall are adapted to retain the nickel particulates in the device to be washed with molten zinc until the particulates are substantially dissolved. The temperature is kept at a minimal value, i.e., no superheat is required to dissolve the nickel homogeneously throughout the zinc melt. After the nickel is dissolved, the nickel-zinc melt is solidified in zinc slabs. The zinc slabs containing nickel have narrow standard deviations from their specification. The dissolving proceeds more efficiently with formation of less dross and less off-specification material, proceeds faster and in less time than heretofore possible, and allows production on a continuous basis.
摘要:
Disclosed herein is an alloy for galvanizing objects of steel which have a concentration of silicon lower than 0.45% by weight. The alloy consists essentially of 0.5 to 1.5% by weight of lead, 0.005 to 0.2% by weight of germanium and the balance zinc. The alloy may further contain 0.001 to 0.05% by weight aluminum.
摘要:
Powders consisting essentially of zinc but having lead contents of from about 1000 to about 30,000 ppm can readily be produced by electrolysis of lead-containing, zinc halide solutions and are superior reductants for the preparation of symmetrical tetrachloropyridine from pentachloropyridine.
摘要:
Hot-dip galvanized steel sheet, wherein said coating layer is characterized by being highly resistant to flaking either in a high-temperature humid atmosphere or in long-term indoor aging. The coating comprises 0.1 to less than 0.2 wt % Al, 0.1-0.5 wt % Sb, the remainder being Zn and unavoidable impurities, the total of the unavoidable impurities other than Fe, namely Pb, Cd and Sn being less than 0.02 wt %, the ratio of Sb/Pb being 10-250, and the Al present in the coating layer being in the form of an Al-Sb eutectic.
摘要:
An alloy suitable for the galvanization of steels by an immersion galvanization process, including gavanization of steels containing silicon, which alloy comprises zinc of commercial purity and has a lead content of the order of 1000 to 20000 p.p.m. by weight, an aluminium content of from 100 to 5000 p.p.m. by weight, a magnesium content of from 10 to 1000 p.p.m. by weight and a tin content of from 300 to 20000 p.p.m. by weight.A galvanization process using the said alloy is also described.
摘要:
A chair moulded in one piece from a suitable plastics material stacks vertically, and has a seating area nearly as great as the plan area of the seat, by waisting the back support at its junction with the seat and rear legs, providing the rear legs with an internally directed channel over the greater part of their length which merges at the tops of the legs into the said waisted portion, and making the side edges of the legs in the side planes of the chair substantially vertical.
摘要:
AN IMPROVED METHOD FOR THE PREPARATION OF STABLE ZINC HYDROSULFITE SOLUTIONS WHEREIN REACTIVE ZINC IS TREATED WITH SULFUR DIOXIDE IN AN AQUEOUS SOLUTION, THE IMPROVEMENT UTILIZING REACTIVE ZINC IN THE FORM OF A CALCIUM-SODIUMZINC ALLOY CONTAINING ABOUT 0.2 TO 1.0% BY WEIGHT OF CALCIUM, ABOUT 0.3 TO 3.0% BY WEIGHT OF SODIUM, AND FROM ABOUT 96 TO 99.5% BY WEIGHT OF ZINC.