Metal deforming – With temperature modification of tool or of specified... – Cooling
Patent
1992-06-29
1993-11-02
Larson, Lowell A.
Metal deforming
With temperature modification of tool or of specified...
Cooling
723428, 72364, B21J 106
Patent
active
052575225
ABSTRACT:
A process of hot forging a steel at an ultrahigh temperature, comprising the steps of: heating a steel containing less than 1 wt % carbon in an atmosphere substantially composed of a non-oxidizing gas at a high heating rate sufficient for suppressing the oxidation of the steel caused by a residual oxidizing impurity gas in the atmosphere to a temperature either within or slightly below a range in which the steel has a solid-liquid dual phase structure; and forging the heated steel in a hot forging die at a high working speed in accordance with a preheating temperature of the die so that the steel is maintained at a temperature necessary for imparting the steel with a formability necessary for effecting the forging until a desired form is attained.
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Miki Takeshi
Toda Masahiro
Larson Lowell A.
McKeon Michael J.
Nippon Steel Corporation
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