Working roll for rolling medium-thickness plate with high grade and high strength and manufacture method thereof
A manufacturing method and high-level technology, applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of many hot cracks on the roll surface and large mechanical impact of the rolls, improve the carbide morphology, reduce the consumption of steel per ton of rolls, The effect of reducing procurement costs
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[0024] Example 1:
[0025] A work roll for rolling high-grade high-strength medium-thick plates. The alloy composition and weight percentage of the working layer are: C3.10%; Si0.90%, Mn0.85%, P≤0.03%, S≤ 0.03%, Cr1.75%, Ni4.35%, Mo0.40%, W0.30%, V1.20%, the rest is Fe and unavoidable impurities; the alloy composition and weight percentage of the cast iron of the roll core are : C: 3.30%; Si: 2.45%; Mn: 0.60%; P≤0.05%; S≤0.01%; Cr: 0.23%; Ni: 0.58%; Mo≤0.12%; Re: ≤0.28%.
[0026] The manufacturing method of the work roll is:
[0027] Casting process. First, the high-alloy molten iron in the working layer is smelted in a 15-ton intermediate frequency furnace, and the roll core cast iron is smelted in a 30-ton intermediate frequency furnace. When the composition of the molten iron in the working layer and the molten iron in the roller core meets the above requirements, the temperature of the molten iron in the working layer and the temperature of the molten iron in the roller core a...
Example
[0030] Example 2 ~ Example 4
[0031] The casting method of the work roll for high-grade high-strength medium and heavy plate rolling in each of Examples 2 to 4 is the same as that of Example 1, and the component content, heat treatment method, performance, etc. of each example are shown in the following table.
[0032]
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