摘要:
An apparatus for continuously dissolving metal powder for use in plating includes a dissolving tank for dissolving metal powder for used in plating solution in a solvent, a filter for separating the solution containing undissolved residue into an undissolved residue and a filtrate, a recovery tank of the filtrate, and a plating solution storing tank for supplying recovered filtrate to a plating tank. The filter is a porous substance having a plurality of liquid passages in the axial direction thereof, and the filter is provided with a circuit for returning a liquid solution containing the undissolved residue passed through the passages to the dissolving tank and a pipeline for leading the filtrate to the recovery tank.A method of dissolving a nickel metal, which has a specific surface of 0.003 m.sup.2 /g or more, is dissolved with the use of the above-described apparatus.
摘要:
Steel having excellent workability and deep drawability is produced by an electric furnace-vacuum degassing process. The steel has a composition which comprises about: C: 0.0050 wt % or less Si: 1.5 wt % or less Mn: 1.5 wt % or less P: 0.10 wt % or less Al: 0.10 wt % or less S: 0.020 wt % or less O: 0.01 wt % or less Cu: 0.02-1.5 wt % Ni: 0.02-2.0 wt % Ti and/or Nb: from 0.001 to 0.10 wt % N: from 0.0040 to 0.0090 wt %.