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Wear-resisting roll used for steel rolling intermediate mill frame and manufacturing method thereof

A rolling mill and roll technology, applied in the field of wear-resistant rolls and their preparation, can solve the problems affecting the normal production of rolled steel, frequent roll replacement, poor wear resistance and thermal fatigue resistance, etc., and achieve good thermal fatigue resistance and production cycle. The effect of short, excellent abrasion resistance

Active Publication Date: 2014-11-19
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

[0004] However, the rolls currently used in rolling mill stands at home and abroad generally have poor wear resistance and thermal fatigue resistance, which leads to frequent roll replacement and affects the normal production of steel rolling.

Method used

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  • Wear-resisting roll used for steel rolling intermediate mill frame and manufacturing method thereof
  • Wear-resisting roll used for steel rolling intermediate mill frame and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The specific preparation method of the wear-resistant roll used for rolling mill stand in rolling steel of the present invention is as follows:

[0025] ①Smelt the outer layer 1 alloy ductile iron of the composite roll and the inner layer 2 high-strength gray iron in two 500 kg medium-frequency induction furnaces respectively. Nickel plate, copper plate, ferro-tungsten and ferro-molybdenum are mixed and heated and melted. When the temperature of molten iron reaches 1519°C, ferrosilicon and ferromanganese are added for pre-deoxidation and alloying. When heated to 1578°C, add vanadium-iron alloy and keep warm at this temperature for 4 minutes. The molten iron composition is adjusted to pass the furnace.

[0026] ② Put the above-mentioned alloy ductile iron molten iron out of the furnace into the ladle, place nickel-magnesium alloy and copper-magnesium alloy in advance at the bottom of the ladle, and cover it with cast iron filings for spheroidizing alloy iron molten iron....

Embodiment 2

[0030] The wear-resistant rolls used in the middle rolling stand of steel rolling are composed of the outer layer of alloy ductile iron 1, the inner layer of high-strength gray iron 2 and the hot-rolled medium carbon round steel roll shaft 3, of which the outer layer 1 alloy ductile iron and the inner layer 2 high-strength The gray iron is compounded by centrifugal casting. The outer layer 1 alloy ductile iron and the inner layer 2 high-strength gray iron are compounded by centrifugal casting. The roller sleeve is machined and combined with the roller shaft 3 hot-rolled medium carbon round steel In one piece, a high-strength wear-resistant composite roll is obtained. The specific preparation method of the wear-resistant roll used for rolling mill stand in rolling steel of the present invention is as follows:

[0031] ①The outer layer 1 alloy ductile iron of the composite roll and the inner layer 2 high-strength gray iron of the composite roll are smelted in two 1000 kg medium ...

Embodiment 3

[0036] The wear-resistant rolls used in the middle rolling stand of steel rolling are composed of the outer layer of alloy ductile iron 1, the inner layer of high-strength gray iron 2, and the hot-rolled medium carbon round steel roll shaft 3, of which the outer layer 1 is alloy ductile iron and the inner layer 2 is high-strength The gray iron is compounded by centrifugal casting. The outer layer 1 alloy ductile iron and the inner layer 2 high-strength gray iron are compounded by centrifugal casting. The roller sleeve is machined and combined with the roller shaft 3 hot-rolled medium carbon round steel In one piece, a high-strength wear-resistant composite roll is obtained. The specific preparation method of the wear-resistant roll used for rolling mill stand in rolling steel of the present invention is as follows:

[0037] ①The outer layer 1 alloy ductile iron of the composite roll and the inner layer 2 high-strength gray iron of the composite roll are smelted in two 500 kg m...

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Abstract

A wear-resisting roll used for a steel rolling intermediate mill frame and a manufacturing method thereof belong to the technical field of steel rolling. The wear-resisting roll is composed of outer layer alloy nodular cast iron, inner layer high strength gray iron and a hot rolled middle carbon round steel roll shaft with high strength. The outer layer alloy nodular cast iron and the inner layer high strength gray iron are formed through centrifugal casting in a composite mode, and the inner layer high strength gray iron is integrated with the hot rolled middle carbon round steel roll shaft with high strength, and the composite wear-resisting roll with high strength is obtained. The wear-resisting roll has the advantages of being simple and convenient in production process, long in service life, low in production cost and the like. In addition, good economic and social benefits are achieved through application and popularization.

Description

technical field [0001] The invention discloses a wear-resistant roll and a preparation method thereof, in particular relates to a wear-resistant roll used for a rolling stand in a steel rolling process and a preparation method thereof, and belongs to the technical field of steel rolling. Background technique [0002] On the one hand, the rolls of the intermediate rolling stand have a deep pass and a large rolling pressure, so the strength of the roll is still crucial; on the other hand, due to the large pass size of the roll, the cooling of the groove bottom cannot be fully carried out Therefore, the thermal crack resistance and impact toughness of the roll cannot be ignored. At the same time, the wear resistance of the rolls of this stand has higher requirements than that of the rough rolling stand, especially the hardness of the bottom of the groove is kept similar to that of the top of the groove. Therefore, pearlitic ductile cast iron II or III with matrix structure of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/03B23P15/00C22C37/10C22C37/04B22D13/00B22D19/16
Inventor 徐继亮符寒光
Owner 枣庄瑞兴机械制造有限公司
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