摘要:
An apparatus for holding molten metal in a container having an opening in the bottom thereof, comprising an electromagnet for forming a horizontal magnetic field in a lower part of the molten metal in the container, and an electrically conductive block for guiding part of eddy currents generated in the molten metal by the horizontal magnetic field.
摘要:
A high tension alloyed molten zinc-plated steel plate having excellent press moldability and plating characteristics, wherein Si is utilized as a reinforcing component, the mutual relation between Si and Mn being specified, an alloying rate of a layer of plating of alloyed zinc being specified, characterized in that: the plated steel has a layer of plating of alloyed molten zinc containing 9-12 % of Fe on a surface of a steel plate containing 0.0005-0.0050 mass % of C, 0.1-2.5 mass % of Si, 0.1-2.5 mass % of Mn, 0.003-0.10 mass % of Ti, 0.0030-0.10 mass % of Nb, 0.0005-0.0080 mass % of B, 0.040-0.18 mass % of P, not more than 0.015 mass % of S, 0.005-0.10 mass % of Al, not more than 0.0060 mass % of N, Si and Mn in amounts satisfying the relation of the following expression, and the remainder substantially comprising an Fe composition.
摘要:
A hot dip galvanized steel plate excellent both in the balance of strength and in adhesiveness between steel and a plating layer, characterized in that the base steel thereof has an average composition: C: 0.05 to 0.25 mass %, Si: 2.0 mass % or less, Mn: 1.0 to 2.5 mass % and Al: 0.005 to 0.10 mass %, provided that the surface part of the base steel just below the plating layer has a C concentration of 0.02 mass % or less, and the structure of the base steel comprises martensite phase in a proportion of 50 % or more in the sum of tempered martensite phase and fine martensite phase, the balance comprising ferrite phase and retained austenite.