Composite roll sleeve for steel pipe rolling mill and manufacturing method thereof

A technology of steel pipe rolling mill and composite roll, applied in the direction of roll, metal rolling, manufacturing tools, etc., can solve the problems of low hardness of roll surface, high brittleness of roll sleeve, poor wear resistance, etc., and achieve good hardness uniformity and low production cost. , the effect of good metallurgical bonding

Active Publication Date: 2019-12-20
枣庄瑞兴机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the various roller sleeves that have been successfully developed at present generally have the disadvantages of low hardness of the roll surface, poor wear resistance, or high brittleness of the roll sleeve, which is easy to crack during use.

Method used

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  • Composite roll sleeve for steel pipe rolling mill and manufacturing method thereof
  • Composite roll sleeve for steel pipe rolling mill and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The composite roll sleeve used for steel pipe rolling mill is composed of outer layer 1 and inner layer 2. The outer layer 1 and inner layer 2 are composited into one body by centrifugal casting method. The composite roll sleeve can be realized through the following process steps:

[0023] ① Melt the outer layer 1 material and inner layer 2 material of the composite roller sleeve in a 500 kg medium frequency induction furnace respectively. The chemical composition and mass fraction of the outer layer 1 material are 2.19% C, 0.97% B, 0.31% Al, 9.16% Cr, 3.57% Mn, 0.58% Te, 0.15% Ce, 0.13% Ti, 0.11% N, 0.17% Ca, 0.54% Si, 0.033% P, 0.027% S, the balance Fe; when the temperature of the outer layer 1 molten iron reaches At 1479°C, the outer layer 1 molten iron is first poured into the high-speed rotating metal mold on the horizontal centrifuge. 1.9-2.2mm zircon powder coating; 3 minutes after the pouring of the outer layer 1 molten iron, use a non-contact thermometer to mea...

Embodiment 2

[0026] The composite roll sleeve used for steel pipe rolling mill is composed of outer layer 1 and inner layer 2. The outer layer 1 and inner layer 2 are composited into one body by centrifugal casting method. The composite roll sleeve can be realized through the following process steps:

[0027] ① Melt the outer layer 1 material and inner layer 2 material of the composite roller sleeve in a 750 kg medium frequency induction furnace respectively. The chemical composition and mass fraction of the outer layer 1 material are 2.35% C, 0.82% B, 0.38% Al, 8.87% Cr, 3.76% Mn, 0.52% Te, 0.23% Ce, 0.08% Ti, 0.05% N, 0.13% Ca, 0.70% Si, 0.030% P, 0.031% S, the balance Fe; when the temperature of the outer layer 1 molten iron reaches At 1462°C, the outer layer 1 molten iron is poured into the high-speed rotating metal mold on the horizontal centrifuge. The speed of the metal mold is 1020rpm, the temperature of the metal mold is 239°C, and the inner surface of the metal mold is coated with...

Embodiment 3

[0030] The composite roll sleeve used for steel pipe rolling mill is composed of outer layer 1 and inner layer 2. The outer layer 1 and inner layer 2 are composited into one body by centrifugal casting method. The composite roll sleeve can be realized through the following process steps:

[0031]① Melt the outer layer 1 material and inner layer 2 material of the composite roller sleeve in a 1000 kg medium frequency induction furnace respectively. The chemical composition and mass fraction of the outer layer 1 material are 2.27% C, 0.88% B, 0.36% Al, 9.05% Cr, 3.63% Mn, 0.55% Te, 0.19% Ce, 0.11% Ti, 0.08% N, 0.14% Ca, 0.63% Si, 0.029% P, 0.021% S, the balance Fe; when the temperature of the outer layer 1 molten iron reaches At 1470°C, the outer layer 1 molten iron is poured into the high-speed rotating metal mold on the horizontal centrifuge. The speed of the metal mold is 1050rpm, the temperature of the metal mold is 224°C, and the inner surface of the metal mold is coated with...

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Abstract

The invention discloses a composite roll sleeve for a steel pipe rolling mill and a manufacturing method of the composite roll sleeve, and belongs to the technical field of steel rolling. An outer-layer material and an inner-layer material of the composite roll sleeve are smelted in a medium-frequency electric induction furnace separately; the outer-layer material is prepared from chemical components including, by mass, 2.19%-2.35% of C, 0.82%-0.97% of B, 0.31%-0.38% of Al, 8.87%-9.16% of Cr, 3.57%-3.76% of Mn, 0.52%-0.58% of Te, 0.15%-0.23% of Ce, 0.08%-0.13% of Ti, 0.05%-0.11% of N, 0.13%-0.17% of Ca, 0.54%-0.70% of Si, less than 0.035% of P, less than 0.032% of S and the balance Fe; and the outer layer and the inner layer are composited into a whole with the centrifugal casting method.The composite roll sleeve is applied to the steel pipe rolling mill, is safe and reliable to use, is free of cracking and peeling phenomena during use, and has the good economic and social benefits after popularization and application.

Description

technical field [0001] The invention discloses a composite roll sleeve and a preparation method thereof, in particular relates to a composite roll sleeve for a steel pipe rolling mill and a manufacturing method thereof, and belongs to the technical field of steel rolling. Background technique [0002] Since the 1950s, due to breakthroughs in transmission technology and electrical control technology, continuous rolling tube production technology has been greatly developed. Mandrel operation mode changed from floating mandrel mill to limited mandrel mill and semi-floating mandrel mill, the number of stands was reduced from 9 to 7 to 6 to 5, and the rolling process was changed from 2 rolls to 3 rolls , the operation mode of the production process is from manual to regional automation to the fully automatic operation mode of the whole line controlled by CPU and PLC. The hydraulic small warehouse control technology is adopted, and the process control software technology is matche...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B21B27/03
CPCB21B27/035
Inventor徐继亮符寒光
Owner枣庄瑞兴机械制造有限公司