Method for remanufacturing scrapped rollers to be qualified rollers
A roll and allowance technology, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve problems such as slippage, broken belt, sticking steel, local overload, peeling of the roll body, economic loss of the roll user, etc., and shorten the manufacturing process. cycle, reduce procurement costs, and reduce resource consumption
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[0010] The method of the present invention transforms scrap rolls into qualified rolls, wherein the rolls contain the following components in weight percent: C 3.2-3.6%, W 1.2-1.6%, Mo 5.0-7.0%, V 2.0-3.0%, Cr 8.0-10.0 %, Al 0.1-0.4%, Ni 2.2-2.6%, Co 6.5-7.5%, Nb 0.2-0.4%, Ti 0.2-0.4%, Ce 0.4-0.6%, Zr 0.05-0.20%, Si<0.8%, Mn <1.5%, S<0.03%, P<0.04, and the balance is Fe; the specific reforming method is: 1) Adopt the annealing process, specifically put the scrapped rolls in an annealing furnace with a furnace temperature of 600 ± 10°C and keep it warm for 13 hours Afterwards, furnace cooling; 2) Machining the scrapped rolls after annealing into roll blanks, the geometric dimensions of the roll blanks are 6 to 7mm extra margin on each geometric dimension of the target roll; 3) Quenching and tempering treatment , before quenching and tempering treatment, conduct ultrasonic flaw detection on the roll billet, put the roll billet into the trolley furnace with a furnace temperature ...
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