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Submerged arc surfacing manufacturing technology of looper roll for rolling mill

A manufacturing process, submerged arc surfacing technology, applied in the direction of manufacturing tools, arc welding equipment, welding media, etc., can solve the problems of frequent replacement, short life, wear of guide rollers, etc., achieve good comprehensive mechanical properties, and improve strength and hardness Effect

Active Publication Date: 2015-07-22
安徽东方新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is to avoid the shortcomings in the above-mentioned prior art, and provides a submerged arc surfacing manufacturing process for looper rolls for rolling mills, so as to solve the problems of severe wear, short life, and frequent replacement of traditional rolling mill guide rolls during service. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Taking the preparation of the roll body of the rolling mill with a specification of Φ130×492 as an example

[0026] Step 1: Roughly machine the base material until the outer diameter is 6mm less than the finished product size, and the material used for the base material is Q235A material;

[0027] Step 2: Use hard material DF-524A welding wire, the welding wire composition is as follows: C0.8%, Si 0.9%, Mn 1.8%, P 0.25%, S 0.2%, Cr 9.0%, Mo 1.9%, Nb 0.35%, V 0.6%, W 2.6%, the rest is Fe, choose HJ107 flux, and surfacing by inverter DC welding machine until the outer diameter is 4mm thicker than the outer diameter of the finished product;

[0028] Step 3: Post-heat-treat the base metal obtained in Step 2, heat it at 600°C for 3 hours, then cool it with the furnace, and cool it with air after the furnace temperature drops to 300°C to obtain a surfacing product;

[0029]Step 4: After the surfacing products are finished to the specified specifications according to the tech...

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Abstract

The invention discloses a submerged arc surfacing manufacturing technology of a looper roll for a rolling mill. The technology specifically comprises the following steps that rough machining is carried out on a base material, the outer diameter of the machined base material is smaller than the size of a finished product by 6 mm, a DF-524A welding wire made of hard materials is adopted, HJ107 flux is selected and matched, surfacing is carried out on the base material through an inversion type direct current welding machine, and the outer diameter of the machined base material is larger than the outer diameter of the finished product by 3-5 mm; post-thermal treatment is carried out on the base material, the machined base material is kept for three hours under the condition of 600 DEG C, then cooling is carried out along with a furnace, the temperature of the furnace is reduced to 300 DEG C, then air cooling is carried out, a surfacing product is obtained, and after finish machining is carried out on the surfacing product according to an art work sheet to obtain the specific specification, the looper roll for the rolling mill is obtained. The looper roll has the advantages of being resistant to abrasion, long in service life and the like.

Description

technical field [0001] The invention belongs to the field of surface engineering and welding, and in particular relates to a submerged arc surfacing manufacturing process for looper rolls used in rolling mills. Background technique [0002] Modern rolling technology requires to ensure the dimensional accuracy and good mechanical properties of the product. During the rolling process, micro-tension and tension-free rolling should be used between the rolling mills to eliminate tension fluctuations and rolled pieces caused by various dynamic disturbances during the rolling process. Dimensional fluctuations. In order to reduce the size fluctuations of the rolled pieces in the intermediate rolling and finishing mills caused by tension changes, several loopers are often set up in the finishing mills, pre-finishing and intermediate rolling mills to eliminate the interference of dynamic speed changes of each stand in continuous rolling 1. To ensure the accuracy of the rolled piece, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/18B23K35/30
CPCB23K9/048B23K9/18B23K35/3086
Inventor 赵仕堂
Owner 安徽东方新材料有限公司
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