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Laser cladding alloy powder for cast steel roller and laser cladding method of laser cladding alloy powder

A cast steel roll, laser cladding technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of limiting the development of surfacing technology, the surface strength is not improved, the surface strength is uneven, etc., to improve the quality of repair, Improve the quality image, the effect of strong red hardness

Inactive Publication Date: 2021-02-02
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of surfacing welding repair technology are cumbersome processing technology, long construction period, and low processing efficiency. Insulation welding, tempering after welding, etc., resulting in high process cost
Knuckles are easy to occur during use, need to be polished, and reduce the operation rate, especially the surfacing powder can not meet the production demand at all, which limits the development of surfacing technology

Method used

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  • Laser cladding alloy powder for cast steel roller and laser cladding method of laser cladding alloy powder
  • Laser cladding alloy powder for cast steel roller and laser cladding method of laser cladding alloy powder
  • Laser cladding alloy powder for cast steel roller and laser cladding method of laser cladding alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: The laser cladding alloy powder for cast steel rolls and its laser cladding method are specifically described as follows.

[0036] (1) The surface of a 60CrNiMo cast steel roll with a diameter of 1300mm is clad with a German LDF-4000-100 semiconductor laser, and the hardness value of the cast steel roll is 43HRC. Surface defects after roll rolling such as figure 2 shown.

[0037] (2) Weigh the powder according to the following weight ratio: C 0.5%, Si 2.0%, B 3.0%, Ni 8.0%, V 2.0%, Cr13.0%, Mn 0.4%, Mo 0.2%, W 0.8% , AlO 4.0%, YO 1.5%, ZrO 3.5%, the balance is Fe and unavoidable impurities. Wherein, the particle size of all components is 200 mesh; the powder is added into a ball mill and mixed for 2 hours to obtain the alloy powder. The alloy powder was dried for two hours before use.

[0038] (3) Pre-treat the area of ​​the roll to be clad to remove rust and oil on the surface; after cleaning and drying with absolute ethanol, place the roll on the di...

Embodiment 2

[0041] Embodiment 2: The laser cladding alloy powder for cast steel rolls and its laser cladding method are specifically described as follows.

[0042] (1) The surface of a 60CrNiMo cast steel roll with a diameter of 1300mm is clad with a German LDF-4000-100 semiconductor laser, and the hardness value of the cast steel roll is 44HRC. Surface defects after roll rolling such as figure 2 shown.

[0043] (2) Weigh the powder according to the following weight ratio: C 0.4%, Si 1.5%, B 2.0%, Ni 9.0%, V 1.0%, Cr14.0%, Mn 0.5%, Mo 0.3%, W 0.7% , AlO 2.0%, YO 1.7%, ZrO 3.0%, the balance is Fe and unavoidable impurities. Wherein, the particle size of all components is 250 mesh; the powder is added into a ball mill and mixed for 4 hours to obtain the alloy powder. The alloy powder was dried for 3 hours before use.

[0044] (3) Pre-treat the area of ​​the roll to be clad to remove rust and oil on the surface; after cleaning and drying with absolute ethanol, place the roll on the disp...

Embodiment 3

[0046] Embodiment 3: The laser cladding alloy powder for cast steel rolls and its laser cladding method are specifically described as follows.

[0047] (1) The surface of a 60CrNiMo cast steel roll with a diameter of 1300mm is clad with a German LDF-4000-100 semiconductor laser, and the hardness value of the cast steel roll is 41HRC. Surface defects after roll rolling such as figure 2 shown.

[0048] (2) Weigh the powder according to the following weight ratio: C 0.5%, Si 2.5%, B 2.5%, Ni 6.0%, V 2.5%, Cr16.0%, Mn 0.3%, Mo 0.2%, W 0.6% , AlO 5.0%, YO 1.2%, ZrO 5.0%, the balance is Fe and unavoidable impurities. Wherein, the particle size of all components is 100 mesh; the powder is added into a ball mill and mixed for 3 hours to obtain the alloy powder. The alloy powder was dried for 2 hours before use.

[0049] (3) Pre-treat the area of ​​the roll to be clad to remove rust and oil on the surface; after cleaning and drying with absolute ethanol, place the roll on the disp...

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Abstract

The invention discloses laser cladding alloy powder for a cast steel roller and a laser cladding method of the laser cladding alloy powder. The laser cladding alloy powder comprises, by mass, 0.4%-0.6% of C, 1%-2.5% of Si, 2%-4% of B, 6%-10% of Ni, 1%-3% of V, 10%-16% of Cr, 0.3%-0.6% of Mn, 0.1%-0.3% of Mo, 0.5%-1% of W, 2%-5% of AlO, 1%-2% of YO, 2%-5% of ZrO, and the balance Fe and inevitable impurities. The alloy powder has the characteristics of high wear resistance, strong red hardness, strong lubricity, stable expansion coefficients in a high-temperature environment, good weldability and the like. The alloy powder used in the method can form good metallurgical bonding with the cast steel roller, and a bonding layer is free of cracks, impurities and holes. According to the method, analloy layer is formed on the surface of the cast steel roller, the alloy layer has the characteristics of high wear resistance, strong lubricity and uniform hardness, the problem of hole pattern steel sticking of the cast steel roller is solved, the use frequency of the cast steel roller can be effectively improved, and the steel passing amount and the rolling mill operation rate of the cast steel roller are improved.

Description

technical field [0001] The invention relates to a laser cladding alloy, in particular to a laser cladding alloy powder for cast steel rolls and a laser cladding method thereof. Background technique [0002] The laser cladding process uses high-energy laser radiation to "weld" the alloy powder on the surface of the roll pass through precise motion control and powder delivery technology to form a high wear-resistant layer. During laser cladding, the base material roll does not need to be preheated, and heat treatment is not required after cladding. The surface flatness after cladding basically does not need to be trimmed, and can be put into use directly. The country advocates only advanced manufacturing in 2025, and laser cladding technology is an advanced manufacturing technology that is suitable for the national strategic development goals and fully responds to the national development strategy. , bringing huge economic benefits. [0003] The rolls of the BD1 rolling mill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/02C22C38/34C22C38/54C22C38/46C22C38/04C22C38/44
CPCC23C24/103C22C38/02C22C38/34C22C38/54C22C38/46C22C38/04C22C38/44
Inventor 姚建新郭赛王彦祥王宏祁明丽黄泽琳曹然
Owner HANDAN IRON & STEEL GROUP