Method for preparing heat-resistant and wear-resistant alloy coatings on surfaces of hot rolling plate fine rolling conveying rollers

A technology of wear-resistant alloy and conveying roller, which is applied in the direction of metal material coating technology, coating, metal processing equipment, etc., can solve the problems of not seeing, achieve the effect of controllable layer depth and improve surface hardness

Active Publication Date: 2014-12-10
SHENYANG DALU LASER COMPLETE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for other specific equipment components, such as specific structures such as hot-rolled plate finish rolling conveyor rolls, the process parameters provided by the existing laser cladding process are obviously unable to adapt
[0013] After searching and checking by the applicant: there is no domestic precedent for using laser cladding process to prepare heat-resistant and wear-resistant alloy coating on the surface of hot-rolled plate finish rolling conveying roll. There are no relevant reports abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Repair of conveying rollers for finishing rolling of hot-rolled plates in X Steel Plant.

[0020] The base material of the hot-rolled plate finish rolling conveyor roll is 42CrMo alloy steel.

[0021] The chemical composition of iron-based alloy powder that is wear-resistant and suitable for working conditions is: C: 0.08%, Cr: 17.2%, Ni: 2.2%, Mo: 0.5%, Si: 0.5%, N: 0.9%, Nb: 0.9%, Ta: 0.3%, B: 0.3%, and the balance is Fe.

[0022] The process is as follows: (1) Surface pretreatment of conveying rollers.

[0023] Degrease and derust the processed surface of the conveying roller at room temperature, and clean it with alcohol. The processing part of the conveyor roller is inspected by the coloring flaw detection method, and it is required that the processing part has no defects such as cracks, pores, and inclusions.

[0024] (2) Selection of alloy powder and adjustment of automatic powder feeding device.

[0025] Select iron-based alloy powde...

Embodiment 2

[0034] Example 2: Repair of delivery rollers for finishing rolling of hot-rolled plates in XX Steel Plant.

[0035] The base material of the hot-rolled plate finish rolling conveyor roll is 42CrMo alloy steel.

[0036] The chemical composition of iron-based alloy powder that is wear-resistant and suitable for working conditions is: C: 0.07%, Cr: 17.5%, Ni: 2.5%, Mo: 0.6%, Si: 0.6%, N: 0.7%, Nb: 0.7%, Ta: 0.35%, B: 0.35%, and the balance is Fe.

[0037] The process is as follows: (1) Surface pretreatment of conveying rollers.

[0038] Degrease and derust the processed surface of the conveying roller at room temperature, and clean it with alcohol. The processing part of the conveyor roller is inspected by the coloring flaw detection method, and it is required that the processing part has no defects such as cracks, pores, and inclusions.

[0039] (2) Selection of alloy powder and adjustment of automatic powder feeding device.

[0040] Select iron-based alloy pow...

Embodiment 3

[0049] Example 3: Repair of conveying rollers for finishing rolling of hot-rolled plates in XXX Steel Plant.

[0050] The base material of the hot-rolled plate finish rolling conveyor roll is 42CrMo alloy steel.

[0051] The chemical composition of iron-based alloy powder that is wear-resistant and suitable for working conditions is: C: 0.09%, Cr: 17.8%, Ni: 2.8%, Mo: 0.8%, Si: 0.8%, N: 0.8%, Nb: 0.8%, Ta: 0.25%, B: 0.25%, and the balance is Fe.

[0052] The process is as follows: (1) Surface pretreatment of conveying rollers.

[0053] Degrease and derust the processed surface of the conveying roller at room temperature, and clean it with alcohol. The processing part of the conveyor roller is inspected by the coloring flaw detection method, and it is required that the processing part has no defects such as cracks, pores, and inclusions.

[0054] (2) Selection of alloy powder and adjustment of automatic powder feeding device.

[0055] Select iron-based alloy p...

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Abstract

The invention relates to a method for preparing heat-resistant and wear-resistant alloy coatings on the surfaces of hot rolling plate fine rolling conveying rollers. The method is characterized by comprising the following steps that: 1) the conveying rollers are subjected to surface pre-treatment; 2) alloy powder is selected, and an automatic powder conveyor is regulated; 3) light beams are regulated, a 10*1mm wide band integral lens is adopted, and in addition, the off-focus value is regulated so that the focused laser facula is rectangular; 4) a DL-HL-T5000 type CO2 laser is adopted for wear-resistant anti-corrosion coating laser cladding, a work table is a SIMENS numerical control laser processing machine, a synchronous powder conveyor is adopted for automatically conveying the alloy powder into a laser molten pool, high-power focus laser beams and an automatic powder conveying head are fed in the axial direction of the conveying rollers, the rotation is carried out at the set rotating speed, and uniform and compact laser cladding layers are formed on the processing surfaces of the conveying rollers; and 5) flaw detection is carried out after the cladding. The surface hardness, the wear resistance and the contact fatigue resistance capability of the conveying rollers can be obviously improved through reinforcing layers formed through the laser cladding.

Description

technical field [0001] The invention relates to a method for preparing a wear-resistant coating on the surface of a metallurgical equipment component, in particular to a method for preparing a heat-resistant and wear-resistant alloy coating on the surface of a finishing rolling conveying roll of a hot-rolled plate by using laser cladding technology, which belongs to laser cladding technology field. Background technique [0002] The finish rolling conveying roller is one of the supporting equipment components of the hot continuous rolling plate production line. Its service life and quality have an important impact on improving the quality and production capacity of plate steel products. The conveying roller is water-cooled during the working process, resulting in alternating hot and cold surfaces, which is prone to fatigue and cracks; at the same time, affected by the pressure and high temperature of the hot-rolled strip, the surface wears due to friction, so that the outer c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C38/54B23K26/342C23C4/06
Inventor 陶兴启黄旭东陈海涛崔忠宝王悦斌郭晓梅
Owner SHENYANG DALU LASER COMPLETE EQUIP
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