Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1981-03-18
1982-11-09
Skiff, Peter K.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148 12C, C21D 948
Patent
active
043583253
ABSTRACT:
A method is provided for improving the formability of low carbon steel sheet by heating it to a temperature above about 250.degree. C. such that the interstitial element content of the steel's ferrite matrix is in the range of from about 5 to 50 parts by weight per million parts iron; quenching the steel to retain at least 5 weight parts per million parts iron of the interstitial elements in the ferrite; and cooling the steel to a temperature below about 0.degree. C. for forming.
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General Motors Corporation
Harasek Elizabeth F.
Skiff Peter K.
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