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Spray-welding coating technology for hot-rolling laminar cooling roller and use fixture for technology

A laminar cooling and coating technology, applied in the direction of metal material coating process, coating, melting spray plating, etc., can solve the problems of affecting the remelting effect, affecting the life and quality of the spray welding roller table, etc.

Active Publication Date: 2014-04-02
ANSHAN ZHENGFA SURFACE TECHN & ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the same way, the adjustment of current and voltage during the remelting process, the travel speed of the substrate workpiece, and the distance between the workpiece and the high-frequency coil will also affect the remelting effect, which will eventually affect the life and quality of the produced spray welding roller table. quality

Method used

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  • Spray-welding coating technology for hot-rolling laminar cooling roller and use fixture for technology
  • Spray-welding coating technology for hot-rolling laminar cooling roller and use fixture for technology

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Embodiment Construction

[0018] A spray welding coating process for hot-rolled laminar flow cooling rolls, comprising the following steps:

[0019] 1) Roller blanking and processing before spraying:

[0020] 1.1) The seamless tube blank is used as the wool of the roller, and the wool is preprocessed to remove the oxide or fatigue layer on the surface, which has the effect of purifying, roughening or activating the surface;

[0021] 1.2) Texturize the roller, that is, turn the roller with a thread pitch of 0.5-1mm, an optimized pitch of 0.95mm, a depth of 0.5-1mm, and an optimized depth of 0.85mm;

[0022] 1.3) Degrease and decontaminate the rough-textured rollers;

[0023] 2) Preheat the workpiece: rotate the roller at a constant speed, and preheat the roller at the same time, the preheating temperature is 400-550°C;

[0024] 3) Spray welding coating: adjust the speed of the roller to 15-20 rpm, adjust the position of the spray gun and then turn on the spray gun, adjust the powder feeding amount and...

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Abstract

The invention relates to a spray-welding coating technology for a hot-rolling laminar cooling roller. The spray-welding coating technology comprises the following steps: 1) blanking a roller and processing before spraying; 2) preheating a workpiece; 3) conducting spray-welding coating: adjusting the velocity of the roller to be 15-20 revolutions per minute, adjusting the position of a spray gun and opening the spray gun, adjusting the powder delivery volume and flame, and meanwhile, moving the roller forwards at a constant speed of 280 mm / min, so as to ensure that the hard alloy in the spray gun is uniformly sprayed on the outer circumference of the roller; 4) auto-rotating the sprayed roller in the environment at the temperature of 370 DEG C to enable the hard alloy on the roller to remelt, and after the hard alloy coating is molten, placing the roller to be subjected to air cooling to obtain the roller with the hard alloy coating. The cooling roller sprayed and welded by adopting the technology and the fixture for spray-welding coating has the functions of abrasion resistance, thermal barrier, antioxidation, corrosion protection, scaffolding resistance, caking inhibition and the like, as well as the service life longer than that of a roller bed in market application.

Description

technical field [0001] The invention relates to a spray welding coating process for hot-rolled laminar flow cooling rolls and a tooling used therefor, which belongs to a surface hardening process. Background technique [0002] The laminar flow cooling roller table for hot rolling is an important part of the hot rolling line, and its quality determines the quality of the billet. At present, the hot-rolled laminar flow cooling roller table in the steel and metallurgical industry has been operating under the extreme working state of high load for a long time, and is subject to multi-field coupling effects of strong corrosion, high heat, and severe wear, which will inevitably cause surface wear and tear on the surface of the roller table. The damage will cause premature wear, oxidation, corrosion, nodulation and other damage on the surface of the roller table, which will affect the operation of the entire production, and eventually cause production stagnation and huge waste of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/02C23C4/14C23C4/18C23C4/06C23C4/129
Inventor 汪鞍亚
Owner ANSHAN ZHENGFA SURFACE TECHN & ENG CO LTD
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