TH1901003123A - Enameled and hot rolled steel sheet for hot forming pan, hot forged steel pan parts and methods for producing it. - Google Patents

Abstract

DEPCT63 A method for producing coated and hot rolled steel plates with a thickness range of between 1.8 mm and 5 mm. Semi-product arrangement Containing elements: 0.04% less than or equal to C less than or equal to 0.38%, 0.40% less than or equal Mn less than or equal 3%, 0.005% less than or equal Si less than or equal to 0.70%, 0.005% less than or equal to Al less than or equal to 0.1%, 0.001% less than or equal to Cr less than or equal to 2%, 0.001% less than or equal to Ni less than or equal to 2%, 0.001% less than or equal to Ti less Greater than or equal to 0.2%, Nb less than or equal to 0.1%, B less than or equal to 0.010%, 0.0005% less than or equal to N less than or equal to 0.010%, 0.0001% less than or equal to S less than or equal to 0.05%, 0.0001% less than or equal P is less than or equal to 0.1%, Mo less than or equal to 0.65%, W less than or equal to 0.30%, Ca less than or equal to 0.006%, hot rolling with final rolling temperature FRT to obtain the product. steel Hot rolled with thickness between 1.8 mm and 5 mm, followed by cooling down to temperature, made Tcoil roll according to the relationship as follows: 450 ° C Less than or equal to Tcoil, less than or equal to Tcoilmax, where Tcoilmax = 650-140 x f gamma, Tcoilmax expressed in degrees Celsius and f gamma expressed austenite ratio before winding, and winding for Hot rolled steel substrates, degreasing and coatings of hot rolled Al or Al alloys substrates are obtained by heat treatment in the tank. To obtain coated and hot rolled steel sheet, which is composed of hot rolled steel sheet and Al or Al alloy with thickness between 10 and 33 μm on each side of the hot rolled sheet. -------------------------------------------------- ---------: