Composite roll ring of high-speed steel
A technology of high-speed steel and composite rolls, which is applied in the direction of rolls, metal processing equipment, metal rolling, etc., can solve the problems of reduced hardness and wear resistance, high manufacturing costs, and difficulty in meeting rolling conditions, so as to improve hardness and durability. Abrasiveness, improved mill operating rate, and improved service life
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[0028] Using the chemical composition range of the high-speed steel composite roller ring of the present invention and the preparation method of the prior art, three batches of roller rings of steel grades A, B and C are trial-produced. Table 1 shows the chemical composition of the molten steel in the outer layer of the three batches of the roll ring and the molten iron in the core of the present invention. First, the molten steel on the outer layer of the roller ring and the molten iron at the core are smelted separately in two electric furnaces. The molten steel on the outer layer of the roller ring is modified with rare earths. The amount of rare earth A, B, and C added is the amount of molten steel (wt%) 0.4%. 0.35%, 0.2%, the outer layer of molten steel after modification is poured into the centrifuge mold with a certain rotation speed, the casting temperature of the outer layer of molten steel A, B, C are 1420℃, 1470℃, 1530℃, A , B, C casting mold temperature is 120 ℃, 170 ℃...
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