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A method for producing wear-resistant steel composite coils by hot rolling asymmetric wear-resistant steel composite billets

A wear-resistant steel, asymmetric technology, used in the driving device, roll, metal rolling and other directions of metal rolling mills, can solve the problems of bending and warping, weld cracking, bulging, etc., to improve the yield and overall efficiency. The effect of improving and improving the surface quality of the cladding

Active Publication Date: 2018-05-15
云南昆钢新型复合材料开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of weld cracking and bulge in the heating process of the asymmetric wear-resistant steel composite billet, as well as the problems of bending and warping and buckling in the rolling and cooling process, the invention provides a composite billet made of asymmetric wear-resistant steel. A method for producing wear-resistant steel composite plate coils by hot rolling to effectively solve the above problems

Method used

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  • A method for producing wear-resistant steel composite coils by hot rolling asymmetric wear-resistant steel composite billets
  • A method for producing wear-resistant steel composite coils by hot rolling asymmetric wear-resistant steel composite billets
  • A method for producing wear-resistant steel composite coils by hot rolling asymmetric wear-resistant steel composite billets

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Experimental program
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Effect test

Embodiment 1

[0023] Rolling an asymmetric wear-resistant steel composite billet with a size of 7000mm*1200mm*150mm, the composite billet is composed of a piece of 65Mn wear-resistant alloy steel and a piece of Q235 ordinary carbon steel; the size of the 65Mn wear-resistant alloy steel is 7000mm*1200mm*82mm , The size of Q235 plain carbon steel is 7000mm*1200mm*68mm, and the rolling target thickness is 4.5mm.

[0024] A. Send the asymmetric wear-resistant steel composite blank coated with high-temperature anti-oxidation and anti-decarburization coating (the coating thickness is 0.2mm) on the 65Mn surface into the heating furnace, so that the 65Mn wear-resistant alloy steel faces upward;

[0025] B. The temperature of the preheating section of the heating furnace in control step A is 620±20°C, and the residence time of the asymmetric wear-resistant steel composite billet in the preheating section is 90 minutes;

[0026] C. After the asymmetric wear-resistant steel composite billet in step B is...

Embodiment 2

[0032] Rolling asymmetric wear-resistant composite billet with a size of 8000mm*1600mm*180mm, the composite billet is composed of a piece of 45Mn2 wear-resistant alloy steel and a piece of Q345 low-alloy steel; among them, the size of 45Mn2 wear-resistant alloy steel is 8000mm*1600mm*120mm, The size of Q345 low-alloy steel is 8000mm*1600mm*60mm, and the rolling target thickness is 6.0mm.

[0033] A. Send the asymmetric wear-resistant steel composite blank coated with high-temperature anti-oxidation and anti-decarburization coating (the coating thickness is 1mm) on the surface of 45Mn2 wear-resistant alloy steel into the heating furnace, so that the 45Mn2 wear-resistant alloy steel faces upward ;

[0034] B. The temperature of the preheating section of the heating furnace in control step A is 680±20°C, and the residence time of the asymmetric wear-resistant steel composite billet in the preheating section is 60 minutes;

[0035] C. After the asymmetric wear-resistant steel com...

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Abstract

The invention discloses a hot-rolling production method of an asymmetrical abrasion-resistant steel composite blank. The method comprises the following steps: putting the asymmetrical abrasion-resistant steel composite blank in a heating furnace in a manner of enabling the abrasion-resistant steel surface to face upwards; controlling the temperature of a preheating stage and the furnace staying time of the heating furnace in the step A and heating in an uniform heating stage conventionally after the preheating stage is ended; conventionally dephosphorizing the asymmetrical abrasion-resistant steel composite blank, then conveying the asymmetrical abrasion-resistant steel composite blank into a hot rolling machine for conventionally rolling to obtain a composite plate, wherein the diameter of an upper roller is smaller than that of a lower roller of a working roller, and the linear speed of the upper roller is greater than that of the lower roller; starting laminar cooling behind a part in a distance of 2-5cm away from the heat of a plate belt of the rolled composite plate, then conventionally rolling to obtain an asymmetrical abrasion-resistant steel composite roll. The hot-rolling production method of the asymmetrical abrasion-resistant steel composite blank is small in welding quantity; the overall efficiency is improved; the asymmetrical abrasion-resistant steel composite blank is stable to roll, low in damage rate, free of problems of bulges, serious warp and damaged heads and high in yield; the prepared asymmetrical abrasion-resistant steel composite roll is high in composite layer surface quality and low in equipment damage rate.

Description

technical field [0001] The invention provides a method for producing wear-resistant steel composite coils by hot rolling an asymmetric wear-resistant steel composite billet, belonging to the technical field of metal pressure processing. Background technique [0002] Asymmetric wear-resistant steel composite billet is a composite billet formed by laminating a piece of wear-resistant steel and a piece of ordinary steel and welding the surroundings. The wear-resistant steel is usually high manganese steel or medium manganese steel, or wear-resistant alloy steel Or hard alloy steel, ordinary steel is ordinary carbon steel or low alloy steel. After the asymmetric wear-resistant steel composite billet is heated and rolled, a new composite material with special properties is obtained by metallurgically combining the two raw material substrates. [0003] Conventional wear-resistant steel composite blanks are box-type symmetrical blanks, usually composed of four-layer, six-layer, ei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/38B21B45/02
CPCB21B1/38B21B45/0218B21B2001/386B21B2267/065B21B2275/05
Inventor 杜顺林张竹明张晓锋张凤珍陈育生尹正培史停停邓增勇王文峰李晋虎王庭昆赵知明
Owner 云南昆钢新型复合材料开发有限公司
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