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A high chromium cast steel roll for hot strip rolling

A high-chromium cast steel and hot-rolled plate technology, applied in the direction of rolls, metal rolling, metal rolling, etc., can solve the problems of long production cycle and complex production process, shorten the production cycle, improve mechanical strength and wear resistance The effect of ensuring hardness and wear resistance

Active Publication Date: 2020-09-15
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the carbon content of high-chromium cast steel rolls is generally low and is affected by the alloy ratio, high-temperature quenching treatment is generally required to meet the requirements of the microstructure, which has the problems of complex production process and long production cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, the roll specification is ￠1200 / 1100×1550, the working layer thickness is 50mm, the hardness requirement is HSD72~78, the composition design target of the working layer of the roll body is C1.60~1.80%, Si0.60~1.00%, Mn0.80~1.00%, Cr12.00~13.00%, Ni1.00~1.50%, Mo1.00~2.00%, V≥0.10%, S≤0.03%, P≤0.05%, the rest is Fe and unavoidable impurities . The manufacturing method is as follows:

[0035] A. Smelting: do ingredients according to the chemical composition of the working layer of the roll, and smelt in an induction furnace to obtain molten steel for the working layer of the roll. The smelting temperature is 1450℃; the roll core is made of pig iron and is smelted in the induction furnace to obtain the roll core. Molten steel, smelting temperature is 1450℃;

[0036] B. Centrifugal casting: Use a centrifuge to cast the working layer of the roll body, and the casting temperature is 1350℃;

[0037] C. Combine box pouring core and roll neck: Combine the sand bo...

Embodiment 2

[0043] In this embodiment, the roll specification is ￠1200 / 1100×1450, the working layer thickness is 50mm, the hardness requirement is HSD80~85, the composition design target of the working layer of the roll body is C1.80~2.00%, Si0.60~1.00%, Mn1.00~1.50%, Cr13.00~15.00%, Ni1.50~2.00%, Mo2.00~2.50%, V≥0.10%, S≤0.03%, P≤0.05%, the rest is Fe and unavoidable impurities . The manufacturing method is as follows:

[0044] A. Smelting: do ingredients according to the chemical composition of the working layer of the roll, smelt in an induction furnace to obtain molten steel for the working layer of the roll, and the smelting temperature is 1550℃; the core of the roll is made of pig iron and smelted in the induction furnace to obtain the core of the roll. Molten steel, smelting temperature is 1500℃;

[0045] B. Centrifugal casting: use a centrifuge to cast the working layer of the roll body, and the casting temperature is 1400℃;

[0046] C. Combine box pouring core and roll neck: Combine ...

Embodiment 3

[0052] In this embodiment, the roll specification is ￠1200 / 1100×1700, the thickness of the working layer is 50mm, the hardness requirement is HSD70~75, and the composition design target of the working layer of the roll body is: C1.60~1.80%, Si0.60~1.00% , Mn0.80~1.10%, Cr12.00~14.00%, Ni1.00~1.50%, Mo1.00~2.00%, V≥0.10%, S≤0.03%, P≤0.05%, the rest is Fe and unavoidable Impurities. The manufacturing method is as follows:

[0053] A. Smelting: do ingredients according to the chemical composition of the working layer of the roll, smelt in an induction furnace to obtain molten steel for the working layer of the roll, and the smelting temperature is 1500℃; the roll core is made of pig iron and smelted in the induction furnace to obtain the roll core Molten steel, smelting temperature is 1480℃;

[0054] B. Centrifugal casting: use a centrifuge to cast the working layer of the roll body, and the casting temperature of molten steel is 1380℃;

[0055] C. Combine box pouring core and roll n...

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Abstract

The invention discloses a high-chromium cast steel roller for rolling of a hot rolled plate strip. The high-chromium cast steel roller comprises a roller core and a roller body working layer. The roller body working layer comprises, by mass, 1.60-2.00% of C, 0.60-1.00% of Si, 0.80-1.50% of Mn, 12.00-15.00% of Cr, 1.00-2.00% of Ni, 1.00-2.50% of Mo, greater than or equal to 0.10% of V, less than orequal to 0.03% of S, less than or equal to 0.05% of P and the balance Fe and inevitable impurities. By improving the chemical components of the roller body working layer and adjusting the heat treatment process, the carbon content is increased, generation of pearlite in a cast structure is suppressed, thus, the mechanical strength and abrasion resistance of the roller are improved, high temperature quenching does not need to be conducted in the rolling process, equipment can be saved, the production period is shortened, the production cost is reduced, and the roller performance stability is improved.

Description

Technical field [0001] The invention relates to a roll, in particular to a high-chromium cast steel roll, which is used for rolling hot-rolled plates and strips. Background technique [0002] High chromium cast steel has high mechanical strength and wear resistance. It has gradually replaced semi-steel and high chromium cast iron rolls. It is widely used as front work rolls for roughing and finishing of hot-rolled strip mills, roughing and roughing of wide and medium plates. Finishing work rolls and finishing rolls for small section steel and bar mills. Because the carbon content of high chromium cast steel rolls is generally low and is affected by the alloy ratio, high temperature quenching is generally required in order to meet the requirements of the structure state, which has the problems of complex production processes and long production cycles. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a high chromium cast s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/46C22C38/56C22C38/04C22C38/02C22C33/04B22D13/02C21D9/38B21B27/00
CPCB21B27/00B22D13/02C21D9/38C22C33/04C22C38/02C22C38/04C22C38/44C22C38/46C22C38/56
Inventor 刘娣杨昱东韩建宁杜旭景刘路军肖泽杨朱志磊陈立峰
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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