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Wear-resistant high-chromium cast iron centrifugal composite roll and production process for narrow strip steel two-high mill

A high-chromium cast iron, two-roll mill technology, applied in the direction of rolls, manufacturing tools, metal rolling, etc., to achieve the effects of excellent use, reduced production costs, and significant economic and social benefits

Active Publication Date: 2019-07-02
唐山钢铁集团重机装备有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, high chromium cast iron rolls have much higher wear resistance, toughness, and strength than ordinary cast iron rolls, and also have good high temperature resistance and corrosion resistance. Generally, they are widely used in the front section of finish rolling, while other Excellent properties have not yet been applied to narrow-strip two-high mill rolls

Method used

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  • Wear-resistant high-chromium cast iron centrifugal composite roll and production process for narrow strip steel two-high mill
  • Wear-resistant high-chromium cast iron centrifugal composite roll and production process for narrow strip steel two-high mill
  • Wear-resistant high-chromium cast iron centrifugal composite roll and production process for narrow strip steel two-high mill

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Experimental program
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Effect test

Embodiment 1

[0046] The specification of the composite roll in this embodiment is Φ580*480, the roll number is 16L1665, and the structure is a three-layer centrifugal composite structure. The chemical composition and mass percentage of the material are shown in Table 1, Table 2 and Table 3.

[0047] The production process of the composite roll of the present embodiment includes the processes of molten iron metamorphism, centrifugal casting, and heat treatment, and the specific process steps are as follows:

[0048] (1) Hot metal deterioration treatment process: 1.5t, 1t, 3t intermediate frequency induction furnaces are used to smelt the molten iron in the working layer, the middle layer and the core; after the molten iron in the working layer is cleared, 10kg / t of broken glass is added to the liquid surface to protect the molten iron from oxidation 15min before tapping, add ferrovanadium with 0.5% molten iron content in the furnace with a particle size of 10mm, add 0.2% ferromanganese part...

Embodiment 2

[0053] The specification of the composite roll in this embodiment is Φ580*480, the roll number is 16L1703, and the structure is a three-layer centrifugal composite structure. The chemical composition and mass percentage of the material are shown in Table 1, Table 2 and Table 3.

[0054] The production process of the composite roll of the present embodiment includes the processes of molten iron metamorphism, centrifugal casting, and heat treatment, and the specific process steps are as follows:

[0055] (1) Hot metal deterioration treatment process: 1.5t, 1t, 3t intermediate frequency induction furnaces are used to smelt the molten iron in the working layer, the middle layer and the core; after the molten iron in the working layer is cleared, 10kg / t of broken glass is added to the liquid surface to protect the molten iron from oxidation 15min before tapping, add 0.5% molten iron vanadium with a particle size of 20mm in the furnace, add 0.2% ferromanganese particles with a parti...

Embodiment 3

[0060] The specification of the composite roll in this embodiment is Φ580*480, the roll number is 16L1732, and the structure is a three-layer centrifugal composite structure. The chemical composition and mass percentage of the material are shown in Table 1, Table 2 and Table 3.

[0061] The production process of the composite roll of the present embodiment includes the processes of molten iron metamorphism, centrifugal casting, and heat treatment, and the specific process steps are as follows:

[0062] (1) Hot metal deterioration treatment process: 1.5t, 1t, 3t intermediate frequency induction furnaces are used to smelt the molten iron in the working layer, the middle layer and the core; after the molten iron in the working layer is cleared, 10kg / t of broken glass is added to the liquid surface to protect the molten iron from oxidation 15min before tapping, add 0.5% molten iron vanadium with a particle size of 12mm, add 0.2% ferromanganese particles with a particle size of 7mm...

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Abstract

The invention discloses a wear-resistant high-chromium cast iron centrifugal composite roller for ribbon steel two-roller mill and a production process. The roller comprises a three-layer centrifugalcomposite structure, a working layer is made of high-chromium cast iron, a middle transition layer is made of graphitic steel, and a roller core portion is made of spheroidal cast iron. The productionprocess includes processes of molten iron modification, centrifugal casting and thermal treatment, wherein the thermal treatment process refers to adopting two sections of stress relief annealing thermal treatment processes. Through reasonable composition design, molten iron modification, special centrifugal casting and thermal treatment, wear resistance and thermostability of the roller are improved remarkably. The roller is safe and reliable to use; compared with common nickel chromium molybdenum infinitely chilled spheroidal cast iron centrifugal rollers, production cost of the roller is reduced by 10-20%, rolled total amount of steel can reach 2-3 times, and the roller has remarkable economic and social benefit when being popularized and applied and can completely replace the common nickel chromium molybdenum infinitely chilled spheroidal cast iron centrifugal rollers.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a wear-resistant high-chromium cast iron centrifugal composite roll for a narrow-strip steel two-roll mill and a production process. Background technique [0002] The diameter of the roll body of the two-high rolling mill for narrow strip steel is relatively large and has strong bite capacity. It is widely used in the rough rolling in the front section of the narrow strip steel after billeting. Generally, nickel-chromium-molybdenum infinite chilled ductile iron is widely used. , and is used in a large amount in production enterprises. Therefore, how to improve its wear resistance will directly affect the cost of roller consumption of production enterprises. [0003] There are slat-like M in the matrix of high chromium cast iron 7 C 3 Type eutectic carbide, chrysanthemum M 2 C-type eutectic carbides and granular M 23 C 6 Type secondary carbide, its matrix stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/08C22C37/10C22C38/44C22C38/04C22C38/02C22C37/04C22C33/08C22C33/04B22D13/02B22D19/16B22D19/08C21D9/38B21B27/03
CPCB21B27/03B22D13/02B22D19/085B22D19/16C21D9/38C22C33/04C22C33/08C22C37/04C22C37/08C22C37/10C22C38/02C22C38/04C22C38/44
Inventor 刘宇肖连华李元春张杰黄明刘宝存高玉章
Owner 唐山钢铁集团重机装备有限公司
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