Method of treating low carbon steel for improved formability

摘要

A method is provided for improving the formability of low carbon steel sheet by heating it to a temperature above about 250 DEG 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 DEG C. for forming.