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Preparation method of heat-resistant and wear-resistant alloy coating on surface of wrapper roll of hot rolling sheet

A technology of wear-resistant alloy and roll-helping roller, which is applied in the coating process and coating of metal materials, can solve the problems of not being seen, achieve the effect of controlling the layer depth and improving the surface hardness

Active Publication Date: 2014-12-10
唐山大陆激光工程技术有限公司
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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 sheet rolling rolls, the process parameters provided by the existing laser cladding process are obviously unable to adapt
[0013] After searching and checking by the applicant: the use of laser cladding technology to prepare a heat-resistant and wear-resistant alloy coating on the surface of the hot-rolled sheet rolling roll has no precedent in China. Did not see related reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Repair of roll-helping rolls for hot-rolled sheet metal of X Company.

[0026] The base material of the hot-rolled sheet rolling roll is 42CrMo alloy steel; the chemical composition of the iron-based alloy powder is: C: 0.1%, Cr: 16%, Ni: 5%, Mo: 1%, Si: 1 %, N: 0.8%, Nb: 0.8%, Ta: 0.4%, B: 0.4%, and the balance is Fe.

[0027] Its process is.

[0028] (1) Pretreatment of the surface of the winding aid roller: degrease and derust the processed surface of the winding assist roller at room temperature, and clean it with alcohol. Inspect the processing part of the winding aid roller by coloring flaw detection method, and it is required that the processing part has no cracks, pores, inclusions and other defects.

[0029] (2) Selection of alloy powder and adjustment of automatic powder feeding device: select iron-based alloy powder with excellent heat resistance and wear resistance and good metallurgical compatibility with the matrix, and adjust the au...

Embodiment 2

[0035] Embodiment 2: The repair of the hot-rolled sheet metal rolling roll of XX company.

[0036] The base material of the hot-rolled sheet rolling roll is 42CrMo alloy steel, and the chemical composition of the iron-based alloy powder is: C: 0.09%, Cr: 15%, Ni: 4%, Mo: 0.8%, Si: 0.8 %, N: 0.6%, Nb: 0.6%, Ta: 0.3%, B: 0.3%, and the balance is Fe.

[0037] Its process is.

[0038] (1) Pretreatment of the surface of the winding aid roller: degrease and derust the processed surface of the winding assist roller at room temperature, and clean it with alcohol. Inspect the processing part of the winding aid roller by coloring flaw detection method, and it is required that the processing part has no cracks, pores, inclusions and other defects.

[0039] (2) Selection of alloy powder and adjustment of automatic powder feeding device: select iron-based alloy powder with excellent heat resistance and wear resistance and good metallurgical compatibility with the matrix, and ad...

Embodiment 3

[0045] Example 3: Repair of roll-helping rolls for hot-rolled sheet metal of XXX Company.

[0046] The base material of the hot-rolled sheet rolling roll is 42CrMo alloy steel, and the chemical composition of the iron-based alloy powder is: C: 0.06%, Cr: 16%, Ni: 3%, Mo: 0.6%, Si: 0.6 %, N: 0.7%, Nb: 0.7%, Ta: 0.2%, B: 0.2%, and the balance is Fe.

[0047] Its process is.

[0048] (1) Pretreatment of the surface of the winding aid roller: degrease and derust the processed surface of the winding assist roller at room temperature, and clean it with alcohol. Inspect the processing part of the winding aid roller by coloring flaw detection method, and it is required that the processing part has no cracks, pores, inclusions and other defects.

[0049] (2) Selection of alloy powder and adjustment of automatic powder feeding device: select iron-based alloy powder with excellent heat resistance and wear resistance and good metallurgical compatibility with the matrix, and ad...

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Abstract

The invention relates to a preparation method of a heat-resistant and wear-resistant alloy coating on the surface of a wrapper roll of a hot rolling sheet, which is characterized by comprising the following steps of: 1) pre-treating the surface of the wrapper roll; 2) selecting alloy powder and adjusting an automatic powder sending device; 3) adjusting a light beam: selecting a broadband integral mirror with the size of 10*1 mm; and adjusting a defocusing distance so that a focal laser spot is rectangular; 4) carrying out laser cladding on the heat-resistant and wear-resistant coating: selecting a DL-HL-T5000 type CO2 laser, wherein an operating platform is a SIMENS CNC (Computerized Numerical Control) laser processing machine; automatically sending the alloy powder into a laser weld crater by a synchronous powder sending device; axially feeding along the wrapper roll by a high-power focal laser beam and an automatic powder sending head; and rotating at a revolving speed so that a uniform and compact laser cladding is formed on the processing surface of the wrapper roll; and 5) carrying out flaw detection after cladding. In the invention, the hardness, the wear resistance and the capability of resisting contact fatigue of the surface of the wrapper roll of the hot rolling sheet can be obviously improved through a strengthened layer formed by the laser cladding.

Description

technical field [0001] The invention relates to a method for preparing a wear-resistant coating on the surface of metallurgical equipment components, in particular to a method for preparing a heat-resistant and wear-resistant alloy coating on the surface of a roll-assisting roll for hot-rolled sheet metal by using laser cladding technology, which belongs to the laser cladding technology field. Background technique [0002] The coiling roll of the rolling mill is an important spare part on the plate rolling production line. Its quality and service life directly affect the size of the roll consumption, the quality of the steel, the maintenance cost, the operating rate of the rolling mill, and finally affect the production cost of the steel. . The reasons for the failure of the winding aid roller: first, the alternating thermal cycle, and the thermal fatigue cracks on the roller surface after a period of use; second, the abrasive wear caused by metal wear and scale between the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F1/00C22C38/54
Inventor 陶兴启黄旭东陈海涛崔忠宝王悦斌郭晓梅
Owner 唐山大陆激光工程技术有限公司
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