Method of producing steel plate with good low-temperature toughn

Details Method of producing steel plate with good low-temperature toughn Method of producing steel plate with good low-temperature toughn

1988-04-25

1989-07-25

Yee, Deborah

Metal treatment

Compositions

Heat treating

148 3, 148 12F, 164476, 164477, C21D 802

Patent

active

048510521

ABSTRACT:
A method of producing steel plate with good low-temperature toughness comprises the steps of casting a steel melt consisting of 0.001-0.300 wt % C, not more than 0.8 wt % Si, 0.4-2.0 wt % Mn, not more than 0.007 wt % Al, 0.0010-0.0100 wt % O and the remainder of iron and unavoidable, impurities, and subjecting the cast steel either as it is or after rolling at a small reduction ration to accelerated cooling. In the cooling step, a fine-grained acicular ferrite texture having oxide-system inclusions as the nuclei develops radially and provides the resulting steel plate with excellent low-temperature toughness.

REFERENCES:
patent: 3990887 (1976-11-01), Hisada

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