Laser cladding method for bearing position of cast iron roller and alloy powder for laser cladding

A laser cladding, cast iron roll technology, applied in the direction of metal material coating process, coating, etc., to achieve the effect of improving working strength and working life, significant economic benefits, and improving service life

Inactive Publication Date: 2019-09-20
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to solve the problem that the traditional method cannot effectively complete the repair of the cast iron ro

Method used

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  • Laser cladding method for bearing position of cast iron roller and alloy powder for laser cladding
  • Laser cladding method for bearing position of cast iron roller and alloy powder for laser cladding

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Experimental program
Comparison scheme
Effect test

Embodiment

[0039] (1) According to the wear condition, turn the bearing position of the cast iron roll by 1 mm on one side to remove the wear fatigue layer;

[0040] (2) Use industrial alcohol to clean the bearing position after turning to remove impurities such as oil stains and oxides;

[0041] (3) Prepare laser cladding powder according to the mass percentage composition of the following alloy powder, each component of the alloy powder is a powder with a purity greater than 99.9%, and the particle size is 135-325 mesh: Mn: 0.32%, B: 1.3%, Cr : 16%, C: 0.03%, Si: 0.8%, and the balance is Fe. The laser cladding powder is transported to the bearing position to be repaired by synchronous powder feeding, and the laser cladding is carried out by laser scanning to obtain the cladding layer. The process parameters of laser cladding are as follows: laser power: 4.0KW, rectangular spot: 2×14mm, lap rate: 50%, scanning speed: 700mm / min, protective gas: argon, powder feeding speed: 3.5g / s, the p...

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Abstract

The invention relates to a laser cladding method for a bearing position of a cast iron roller and alloy powder for laser cladding, wherein the alloy powder for the laser cladding comprises, by mass: Mn: 0.32%-0.43%, B: 1.2%-1.3%, Cr: 12.5%-16.5%, C: 0.03%-0.08%, Si: 0.62-0.8%, and the balance Fe. The alloy powder can be used for preparing a high-performance surface alloy layer on a low-cost cast iron roller bearing position base material, metal is endowed with good wear resistance, corrosion resistance and other properties and the service life of the repaired bearing position is greatly prolonged. By adopting the alloy powder for the laser cladding and combining a cladding alloy layer formed by the corresponding laser cladding method for the bearing position of the cast iron roller, good metallurgical bonding can be formed between the alloy powder and the surface of a cast iron roller bearing position base body after laser cladding processing, good toughness, strength and wear resistance are achieved, laser cladding repair of the cast iron roll bearing position after wear is effectively realized, and defects of cracks, air holes and the like are avoided, therefore, the working strength and the working life of the cast iron roller are improved, and remarkable economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of surface engineering, in particular to a laser cladding method for cast iron roll bearing positions and an alloy powder for laser cladding. Background technique [0002] Laser cladding is also called laser remanufacturing technology and laser repair technology. Laser cladding technology is a new technology that uses high-energy laser and metal powder materials to strengthen the alloy of various parts. After treatment, its surface hardness and wear resistance can be significantly improved, the service life of parts can be extended, the operation rate can be improved, and production can be increased. purpose of reducing consumption. The working principle of laser cladding is to place the selected coating material on the surface of the substrate to be coated in different filling methods. After laser irradiation, it melts with a thin layer on the surface of the substrate at the same time, and after rapid solidification...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C38/02C22C38/32C22C38/04B22F1/00
CPCB22F1/0003C22C38/02C22C38/04C22C38/32C23C24/103
Inventor 付宇明付晨张钰郑丽娟
Owner YANSHAN UNIV
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