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Wear-resistant MoSiCu laser clad layer material and preparation method thereof

A laser cladding and coating material technology, applied in the field of material surface strengthening, to achieve the effects of stable friction coefficient, good wear resistance, fine and uniform structure

Inactive Publication Date: 2018-11-20
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of tribology, metal silicides with high hardness and strong interatomic bonding have excellent wear resistance and friction reduction properties, while single-phase binary metal silicides MoSi 2 Because of its high melting point (2030°C) and moderate density (6.24g / cm 3 ), high-temperature oxidation resistance has become a research hotspot, but its brittleness makes it difficult to use as a coating, and multiphase toughening is an effective measure to improve its brittleness

Method used

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  • Wear-resistant MoSiCu laser clad layer material and preparation method thereof
  • Wear-resistant MoSiCu laser clad layer material and preparation method thereof
  • Wear-resistant MoSiCu laser clad layer material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] The composition of the first cladding powder material is calculated by atomic percentage: 27% Mo, 33% Si, 40% Cu. A single-element powder with a particle size of 200 mesh was used for powder mixing in a ball mill for 1.5 hours according to the above alloy ratio, and a uniform powder was obtained after mixing. Then clean and polish the surface of the substrate, wipe it clean, and blow dry; use diacetone alcohol solution to adjust the powder to a viscous state, pre-set it on the surface of the substrate and dry it naturally, then dry it in a drying box for 2 hours at a drying temperature of 180 °C. The thickness is 1.5mm. Then use the laser beam to carry out laser cladding on the substrate surface of the preset Mo, Si, Cu alloy powder to prepare the ternary alloy coating. The flow rate is 20L / min, the laser power is 2500W, the scanning speed is 900mm / min, and the defocus is 25mm.

[0025] See attached figure 1 , 2 As shown in , 4 and 5, the structure of the obtained c...

Embodiment 2

[0027] The composition of the first cladding powder material is calculated by atomic percentage: 37% Mo, 22% Si, 40% Cu. A single-element powder with a particle size of 150 mesh was used for powder mixing in a ball mill for 1 hour according to the above alloy ratio, and a uniform powder was obtained after mixing. Then clean and polish the surface of the substrate, wipe it clean, and blow dry; use diacetone alcohol solution to adjust the powder to a viscous state, pre-set it on the surface of the substrate and let it dry naturally, then dry it in a drying box for 1.5 hours at a drying temperature of 150 °C. The thickness is 1.2mm. Then use the laser beam to carry out laser cladding on the substrate surface of the preset Mo, Si, Cu alloy powder to form a ternary alloy coating. The flow rate is 20L / min, the laser power is 3000W, the scanning speed is 1500mm / min, and the defocus is 25mm.

[0028] see image 3 As shown, the feathery material in the obtained cladding layer is mai...

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Abstract

The invention discloses a wear-resistant MoSiCu laser clad layer material and a preparation method thereof. The clad layer comprises the elements including Mo, Si and Cu and comprises the following chemical components by atomic percent: 20% to 40% of Mo, 20% to 40% of Si and 40% of Cu; an alloy layer is prepared by adopting a laser cladding process; the laser machining parameters are that the laser power is 2500-3000 W; the scanning speed is 600-1800 mm / min; the defocusing amount is 25 mm; the argon protective air flow rate is 15-25 L / min; and a stainless steel surface can be coated with a wear-resistant MoSiCu ternary alloy coating which has certain thickness and is good in metallurgical quality.

Description

technical field [0001] The invention relates to a surface laser cladding material and a preparation method thereof, in particular to a wear-resistant MoSiCu laser cladding layer material and a preparation method thereof, and belongs to the technical field of material surface strengthening. Background technique [0002] Laser cladding refers to placing pre-coating materials on the surface of the substrate in different ways. The commonly used methods are synchronous powder feeding method and pre-coating powder method. The high-energy laser beam is used to irradiate the surface of the substrate, and the cladding powder and the substrate form a Thin layer, this thin layer heats up rapidly, gasifies and melts, and solidifies quickly to form, and the dilution of the substrate to the cladding layer is extremely low, so the metallurgical combination of the cladding layer and the substrate is good, thereby significantly improving the hardness and wear resistance of the substrate and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C30/02C22C27/04C22C9/00
CPCC22C9/00C22C27/04C22C30/02C23C24/103
Inventor 张培磊闫华李绍伟于治水
Owner SHANGHAI UNIV OF ENG SCI
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