A kind of bimetallic cast-welded composite roll and its preparation method

A composite roll and bimetallic technology, applied in the field of rolls, can solve the problems of cracks on the roll body that are not easy to control, the joint area of ​​the composite interface is uneven, and it is difficult to ensure the integrity of the joint area, etc., to achieve low C content, large rolling The effect of suppressing cyclic stress and high hardness

Active Publication Date: 2020-05-19
JIAMUSI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses low-injection production to waste metal. At the same time, it is difficult to ensure the integrity of the bonding area during the pouring process due to the similar melting points of the two steels. The metallographic diagram or SEM image shows that the composite interface bonding area is not smooth. The problem of cracks in the roll body produced by the machine is not easy to control. The roll body is prepared by the rapid cooling method, and the wear resistance and hardness of the roll body are poor.

Method used

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  • A kind of bimetallic cast-welded composite roll and its preparation method
  • A kind of bimetallic cast-welded composite roll and its preparation method
  • A kind of bimetallic cast-welded composite roll and its preparation method

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Embodiment 1

[0030] The preparation method of the bimetal cast-welded composite roll of the present embodiment comprises the following steps:

[0031] Step 1. Preparation of alloy steel roll core: cast alloy steel roll core by sand casting method; the alloy steel roll core includes the following components in mass percentage: C 0.26%, Si 1.5%, Mn 1.97%, Cr 1.62%, Mo 0.459%, the balance is Fe; the melting point of the alloy steel roll core is 1420°C;

[0032] Step 2, preparing the surfacing layer: the alloy steel roller core cast in step 1 is subjected to shot blasting, and the surface of the alloy steel roller core after shot blasting is surfacing welding high chromium cast iron welding wire to obtain an alloy with a surfacing layer on the surface Steel roller core; the surfacing layer includes the following components in mass percentage: C 2.0%, Cr 15.0%, and the balance is Fe; the melting point of the surfacing layer is 1200°C, and the thickness of the surfacing layer is 6.5mm ;

[003...

Embodiment 2

[0050] The preparation method of the bimetal cast-welded composite roll of the present embodiment comprises the following steps:

[0051] Step 1. Preparation of alloy steel roll core: casting alloy steel roll core by sand casting method; the alloy steel roll core includes the following components in mass percentage: C 0.22%, Si 1.5%, Mn 1.97%, Cr 1.62%, Mo 0.459%, the balance is Fe; the melting point of the alloy steel roll core is 1420°C;

[0052] Step 2, preparing the surfacing layer: the alloy steel roller core cast in step 1 is subjected to shot blasting, and the surface of the alloy steel roller core after shot blasting is surfacing welding high chromium cast iron welding wire to obtain an alloy with a surfacing layer on the surface Steel roller core; the surfacing layer includes the following components in mass percentage: C 2.8%, Cr 20.0%, and the balance is Fe; the melting point of the surfacing layer is 1200°C, and the thickness of the surfacing layer is 3mm;

[0053...

Embodiment 3

[0058] The preparation method of the bimetal cast-welded composite roll of the present embodiment comprises the following steps:

[0059] Step 1. Preparation of alloy steel roll core: casting alloy steel roll core by sand casting method; the alloy steel roll core includes the following components in mass percentage: C 0.22%, Si 1.5%, Mn 1.97%, Cr 1.62%, Mo 0.459%, the balance is Fe; the melting point of the alloy steel roll core is 1420°C;

[0060] Step 2, preparing the surfacing layer: the alloy steel roller core cast in step 1 is subjected to shot blasting, and the surface of the alloy steel roller core after shot blasting is surfacing welding high chromium cast iron welding wire to obtain an alloy with a surfacing layer on the surface Steel roller core; the surfacing layer includes the following components in mass percentage: C 3.6%, Cr 26.0%, and the balance is Fe; the melting point of the surfacing layer is 1220°C, and the thickness of the surfacing layer is 10mm;

[006...

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Abstract

The invention provides a manufacturing method for a bimetal cast-weld composite roller. The method comprises the following steps: casting an alloy steel roller core, performing surfacing on the surface after shot-blasting and clearing; performing induction heating for heating the alloy steel roller core with a surfacing layer, and casting molten-state alloy cast iron onto the surfacing layer, thereby forming a cast iron solidification layer; and finally, performing induction heating, enabling the cast iron solidification layer to bond with the surfacing layer on the surface of the alloy steelroller core in a metallurgical mode, thereby obtaining the bimetal cast-weld composite roller. The bimetal cast-weld composite roller manufactured by the method is high in alloy steel roller core strength, is good in toughness, is high in roller body hardness, is good in wear resistance, can bear relatively great rolling circulating stress, strong friction and extrusion, is not liable to peel offand have roller surface cracks; and the surfacing layer can guarantee metallurgical bonding between the surfaced alloy steel roller core and a cast roller body, is not liable to cause peel-off, can reduce bonding difficulty between the roller body and the roller core, and reduces the cost; and the length and the diameter of the roller core are not limited, so that the manufactured bimetal cast-weld composite roller is strong in selectivity.

Description

technical field [0001] The invention belongs to the technical field of rolls, and in particular relates to a bimetallic cast-welded composite roll and a preparation method thereof. Background technique [0002] Steel rolling mills are widely used in mining, metallurgy and other industries, and rolls are one of the main consumable spare parts in steel rolling production. Their quality not only affects the cost of steel rolling production and the production rate of rolling mills, but also affects the quality of rolled products to a large extent. The roll is the main deformation tool of the rolling mill. Due to its own material and its harsh working conditions, it often fails or even is scrapped. The main failure forms include cracks and peeling of the roll surface and roll breakage. The rolls in use, because the rolls are subjected to heavy rolling cycle stress, strong friction and extrusion, instantaneous high temperature and strong impact during the working process, are ofte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16B21B27/02C22C38/02C22C38/38C22C38/22C22C37/08
CPCB21B27/02B22D19/0081B22D19/16C22C37/08C22C38/02C22C38/22C22C38/38
Inventor 荣守范王迪焦仁宝李洪波张圳炫朱永长刘力
Owner JIAMUSI UNIVERSITY
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