A method of laser cladding wear-resistant and impact-resistant coating on cast iron surface

A technology of laser cladding and impact-resistant layer, applied in the direction of coating, metal material coating process, etc., can solve the problems of pores and slag inclusion, and achieve the effect of reducing pores, good metallurgical bonding, and reducing carbon content.

Active Publication Date: 2020-04-28
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The technical solution of the present invention: In order to solve the problems of pores and slag inclusions in the laser cladding process of cast iron materials, a method of laser cladding wear-resistant and impact-resistant coating on the surface of cast iron is provided to achieve no pores and slag inclusions, high wear resistance and impact resistance Preparation of the protective coating

Method used

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  • A method of laser cladding wear-resistant and impact-resistant coating on cast iron surface
  • A method of laser cladding wear-resistant and impact-resistant coating on cast iron surface
  • A method of laser cladding wear-resistant and impact-resistant coating on cast iron surface

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Embodiment 1

[0050] In this embodiment, vermicular graphite cast iron is used as the matrix, and the base layer material is nickel-based alloy powder. The chemical composition (mass percentage of each element) is: C: 0.02%, Si: 0.1%, Mn: 0.4%, Cr: 15.5%, Co : 2.0%, Mo: 15.5%, W: 3.8%, Nb: 0.31%, Fe: 0.7%, Ni: the balance; the wear-resistant and impact-resistant layer material is iron-based alloy powder, and the chemical composition (mass percentage of each element) is : C: 0.30%, Si: 3.5%, Cr: 10.5%, B: 2.0%, Fe: 10.0%, Ni: balance;

[0051] The specific implementation steps are as follows:

[0052] (1) Dry the nickel-based alloy powder and the iron-based alloy powder in a vacuum oven at 85° C. for two hours after weighing;

[0053] (2) grinding the surface of the vermicular graphite cast iron to be treated with sandpaper for roughening, and then cleaning the oil stain with acetone for use;

[0054] (3) Coat the blackened coating for laser quenching on the surface of vermicular graphite ...

Embodiment 2

[0058] In this embodiment, gray cast iron is used as the matrix, and the base layer material is nickel-based alloy powder. The chemical composition (mass percentage of each element) is: C: 0.025%, Si: 0.12%, Mn: 0.43%, Cr: 16%, Co: 2.4%, Mo: 16%, W: 4.2%, Nb: 0.34%, Fe: 0.75%, Ni: the balance; the wear-resistant and impact-resistant layer material is iron-based alloy powder, and the chemical composition (mass percentage of each element) is: C: 0.32%, Si: 3.9%, Cr: 11, B: 2.3%, Fe: 10.5%, Ni: balance;

[0059] The specific implementation steps are as follows:

[0060] (1) Weigh the nickel-based alloy powder and the cobalt-based alloy powder and dry them in a vacuum oven at 80°C for two hours;

[0061] (2) Grinding the surface of the gray cast iron with sandpaper and carrying out roughening treatment, then cleaning the greasy dirt with acetone for use;

[0062] (3) Coat the blackened coating for laser quenching on the surface of gray cast iron, and then carry out laser quenchi...

Embodiment 3

[0066] In this embodiment, nodular cast iron is used as the matrix, and the base layer material is nickel-based alloy powder. The chemical composition (mass percentage of each element) is: C: 0.03%, Si: 0.14%, Mn: 0.46%, Cr: 16.5%, Co: 2.8%, Mo: 16.5%, W: 4.6%, Nb: 0.37%, Fe: 0.8%, Ni: the balance; the material of the wear-resistant and impact-resistant layer is iron-based alloy powder. The chemical composition (mass percentage of each element) is: C : 0.34%, Si: 4.3%, Cr: 11.5%, B: 2.6%, Fe: 11.0%, Ni: balance;

[0067] The specific implementation steps are as follows:

[0068] (1) After weighing the nickel-based alloy powder and the iron-based alloy powder, dry them in a vacuum oven at 90°C for two hours;

[0069] (2) Polish the surface of the nodular cast iron with sandpaper and carry out roughening treatment, then use acetone to clean the greasy dirt for later use;

[0070] (3) Coat the blackened coating for laser quenching on the surface of ductile iron after mechanical...

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Abstract

The invention discloses a wear-resistant and impact-resistant coating method for laser cladding on the surface of cast iron. The surface is sanded with sandpaper for textured treatment, and then cleaned with acetone for oil stains; (3) The surface of the machined cast iron is coated with blackening paint for laser quenching, and then laser quenched; (4) To be laser quenched After the end, the coaxial powder feeding laser cladding metal alloy layer is performed on the formed laser quenching layer; (5) the coaxial powder feeding laser cladding metal alloy is again wear-resistant on the formed metal alloy layer. Impact resistant layer.

Description

technical field [0001] The invention belongs to the field of laser processing, and relates to a method for laser cladding a wear-resistant and impact-resistant coating on the surface of cast iron. Background technique [0002] Cast iron material refers to the general name of the alloy composed of iron, carbon and silicon, which has the characteristics of good casting performance, energy saving and easy recycling. According to the state and form of carbon in cast iron, cast iron can be divided into: cementite white cast iron, flake graphite gray cast iron, group floc graphite malleable cast iron, spherical nodular cast iron, worm vermicular cast iron and adding Alloy iron castings with appropriate amount of alloying elements. At present, cast iron materials are widely used in heavy industries such as machining, automobiles, ships, and petrochemicals because of their excellent performance. However, in the working environment of the above fields, the cast iron parts used for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C21D1/09C23F17/00C22C19/05
CPCC21D1/09C22C19/056C23C24/103C23F17/00
Inventor 石岩李云峰刘佳陈奎明倪聪
Owner CHANGCHUN UNIV OF SCI & TECH
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