Roller ring for bar mill reducing and sizing unit and preparation method thereof
A bar mill, reducing and sizing technology, applied in the direction of rolls, metal rolling, metal rolling, etc., can solve the problems of complex production process and high cost of roll rings, and achieve uniformity of structure, low cost and simple production Effect
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[0028] The preparation method of the roll ring for the reducing and sizing unit of the bar rolling mill comprises the following steps:
[0029] In step a, the high-alloy molten steel in the outer layer of the roll ring and the low-alloy molten steel in the inner layer of the roll ring are respectively smelted in an intermediate frequency furnace.
[0030] In step b, after the smelting is completed, both the high-alloy molten steel in the outer layer of the roll ring and the low-alloy molten steel in the inner layer of the roll ring are raised to above 1600 ° C, and are ready to be released; After 10 minutes, the low alloy molten steel in the inner layer of the roll ring is discharged.
[0031] Step c, according to the thickness of the working layer used by the roller ring, the pouring amount of molten steel in the outer layer of the roller ring and the inner layer of the roller ring is calculated, and the smelted outer layer of molten steel and the inner layer of molten steel ...
Embodiment 1
[0042]A roll ring for a reduction and sizing unit of a bar rolling mill is characterized in that it comprises an outer layer of the roll ring and an inner layer of the roll ring prepared by a centrifugal casting method, the chemical composition of the outer layer of the roll ring and the weight of each component. The content is: C 1.50~2.20%, Si 0.20~1.00%, Mn 0.20~1.00%, P≤0.03%, S≤0.03%, Cr 3.00~8.00%, Ni 0.30~1.50%, Mo 3.00~8.00%, V 2.00~8.00%, W 2.00~8.00%, the rest are Fe and inevitable impurities, the chemical composition of the inner layer of the roller ring and the weight percentage of each component are: C 1.50~2.00%, Si 0.60~1.80%, Mn0.20~1.00%, P≤0.03%, S≤0.03%, the rest are Fe and inevitable impurities.
[0043] The preparation method of the roll ring for the reducing and sizing unit of the bar rolling mill comprises the following steps:
[0044] In step a, the high-alloy molten steel in the outer layer of the roll ring and the low-alloy molten steel in the inner ...
Embodiment 2
[0059] A roll ring for a reduction and sizing unit of a bar rolling mill is characterized in that it comprises an outer layer of the roll ring and an inner layer of the roll ring prepared by a centrifugal casting method, the chemical composition of the outer layer of the roll ring and the weight of each component. The content is: C 1.50~2.20%, Si 0.20~1.00%, Mn 0.20~1.00%, P≤0.03%, S≤0.03%, Cr 3.00~8.00%, Ni 0.30~1.50%, Mo 3.00~8.00%, V 2.00~8.00%, W 2.00~8.00%, the rest are Fe and inevitable impurities, the chemical composition of the inner layer of the roller ring and the weight percentage of each component are: C 1.50~2.00%, Si 0.60~1.80%, Mn0.20~1.00%, P≤0.03%, S≤0.03%, the rest are Fe and inevitable impurities.
[0060] The preparation method of the roll ring for the reducing and sizing unit of the bar rolling mill comprises the following steps:
[0061] In step a, the high-alloy molten steel in the outer layer of the roll ring and the low-alloy molten steel in the inner...
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