Procedure for manufacture of steel band or strip
AssigneeUddehoms Aktiebolag
InventorBo Lennart Janzon
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Abstract
A process for manufacture of a steel band or steel strip, the steel comprising spheroidal carbide particles in a ferritic base, wherein a steel, the major part of which is a carbonaceous ferritic austenite conversion product which is, structurally, at least one of lamellar perlite, granular perlite, sorbite, bainite and martensite, and which is at a temperature below the steel A.sub.cl -temperature is heated to a temperature which is above the A.sub.cl -temperature and within the ferrite metastability range, the steel is then rolled at a temperature in the said metastable temperature range, and the steel is then cooled to below the A.sub.cl -temperature, the heating, rolling and cooling taking place in a time short enough to ensure that no substantial conversion to austenite occurs in the steel.
Claims6
A process for the manufacture of a band or strip of a steel comprising spheroidal carbide particles in a ferritic base which comprises heating a steel, the major part of which is, structurally, at least one carbonaceous ferritic austenite conversion product selected from the group consisting of lamellar perlite, granular perlite, sorbite, bainite and martensite, to a temperature which is above the A.sub.cl -temperature for that steel and within the ferritie metastability range for that steel, rolling the steel at a temperature in the said metastable temperature range, and then cooling the steel to below the A.sub.cl -temperature, the heating, rolling and cooling taking place in a time short enough to ensure that no substantial conversion to austenite occurs in the steel.
Dependencies are inferred from the claim text.