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Method for preparing high-speed steel coating by carrying out laser cladding on surface of spheroidal graphite cast iron

A nodular cast iron and laser cladding technology, applied in the field of materials, can solve the problems of comprehensive wear, easy stress, and roll failure, and achieve the effects of prolonging service life, small machining allowance, and accurate control of coating thickness

Active Publication Date: 2013-09-11
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the above-mentioned harsh conditions, stress is easily generated in the working layer of the roll, and the stress load changes alternately in the quenching zone, resulting in cracks on the roll body and the combined effect of wear, which eventually leads to roll failure

Method used

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  • Method for preparing high-speed steel coating by carrying out laser cladding on surface of spheroidal graphite cast iron
  • Method for preparing high-speed steel coating by carrying out laser cladding on surface of spheroidal graphite cast iron
  • Method for preparing high-speed steel coating by carrying out laser cladding on surface of spheroidal graphite cast iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Use acetone to remove the oil stain on the surface of the ductile iron, use No. 400 sandpaper to polish the surface of the ductile iron to remove the rust layer, and then use absolute ethanol to clean the surface of the ductile iron;

[0037] Prepare V10 high-speed steel powder, its composition contains C2.4%, Cr5.5%, Mo1.3%, V10.5% by weight percentage, the balance is Fe, particle size≤44μm;

[0038]Laser cladding treatment is carried out on the surface of nodular cast iron by using a semiconductor laser, and the high-speed steel powder is preset on the surface of the nodular cast iron. At the same time, the surface of the nodular cast iron is irradiated with laser to melt the high-speed steel powder and the surface of the nodular cast iron to control the laser cladding. The power is 2300W, the scanning speed is 10mm / s, the laser is focused, and the spot is a rectangular spot with a length of 11.5mm and a width of 2.5mm; the thickness of the preset high-speed steel powd...

Embodiment 2

[0042] The method for removing oil stains and rust layers on the surface of ductile iron and cleaning the surface of ductile iron is the same as in Example 1;

[0043] Prepare V10 high-speed steel powder, its composition contains C2.5%, Cr5.3%, Mo1.0%, V10% by weight percentage, the balance is Fe, particle size≤44μm;

[0044] Laser cladding treatment is carried out on the surface of ductile iron by semiconductor laser, the high-speed steel powder is preset on the surface of ductile iron, and the surface of ductile iron is irradiated with laser to melt the high-speed steel powder and the surface of ductile iron, and the power of laser cladding is controlled It is 1800W, the scanning speed is 6mm / s, the laser is focused, and the spot is a rectangular spot with a length of 8mm and a width of 1mm; the thickness of the preset high-speed steel powder is 0.5mm, and the overlap rate is 50%; after the laser cladding is completed, the The surface of the ductile iron is coated with high-...

Embodiment 3

[0046] The method for removing oil stains and rust layers on the surface of ductile iron and cleaning the surface of ductile iron is the same as in Example 1;

[0047] Prepare V10 high-speed steel powder, the composition of which contains C2.4%, Cr5%, Mo0.5%, V9.5% by weight percentage, the balance is Fe, and the particle size is ≤44μm;

[0048] Laser cladding treatment is carried out on the surface of ductile iron by semiconductor laser, the high-speed steel powder is preset on the surface of ductile iron, and the surface of ductile iron is irradiated with laser to melt the high-speed steel powder and the surface of ductile iron, and the power of laser cladding is controlled The laser is 3000W, the scanning speed is 8mm / s, the laser is focused, and the spot is a rectangular spot with a length of 10mm and a width of 2mm; the thickness of the high-speed steel powder is 1.5mm, and the overlap rate is 60%; after the laser cladding is completed, the surface of the ductile iron The...

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Abstract

The invention relates to a method for preparing a high-speed steel coating by carrying out laser cladding on the surface of spheroidal graphite cast iron, belonging to the technical field of materials. The method comprises the following steps of: (1) removing oil stains and a rust layer on the spheroidal graphite cast iron, and cleaning the surface of the spheroidal graphite cast iron; (2) preparing high-speed steel powder with the particle size being less than or equal to 150 microns; (3) carrying out laser cladding treatment on the surface of the spheroidal graphite cast iron by a laser, prearranging the high-speed steel powder on the surface of the spheroidal graphite cast iron or conveying the high-speed steel powder onto the surface of the spheroidal graphite cast iron by a powder conveying device of the laser, and carrying out laser irradiation on the surface of the spheroidal graphite cast iron to melt the high-speed steel powder and the surface of the spheroidal graphite cast iron, thus obtaining the high-speed steel coating on the surface of the spheroidal graphite cast iron after the laser cladding is finished. The method can be easily controlled in an automatic way, and also has the characteristics of being free from environmental pollution, low in noise, high in production efficiency, low in energy consumption, less in working allowance of a cladding layer, high in yield, low in comprehensive cost, etc.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for preparing a high-speed steel coating by laser cladding on the surface of nodular cast iron. Background technique [0002] Metallurgical rolls are tools for plastic deformation of metals, and are important large-scale consumable parts that determine the efficiency of rolling mills and the quality of rolled products. However, hot rolls usually operate in a harsh high-temperature environment, and are subjected to strong rolling force, severe wear and thermal fatigue with large temperature changes. Due to the above harsh conditions, stress is easily generated in the working layer of the roll, and the stress load changes alternately in the quenching zone, resulting in cracks on the roll body, combined with wear and tear, which eventually leads to roll failure. Therefore, prolonging the service life of rolls is very important to reduce roll consumption. [0003] High-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/36C22C38/30C22C38/24
Inventor 刘常升吕建斌刘栋王路张斌陈岁元张滨梁京商硕成健孙有政王思宇
Owner NORTHEASTERN UNIV LIAONING
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