Laser cladding in-situ synthesis ceramic phase reinforced Fe-base cladding layer and preparation method thereof

A technology of laser cladding and in-situ synthesis, which is applied in the direction of coating and metal material coating process to achieve the effect of simple production equipment and process, convenient operation and easy automation

Inactive Publication Date: 2013-09-11
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: aiming at the shortcomings of existing laser cladding surface strengthening, a laser cladding in-situ sy

Method used

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  • Laser cladding in-situ synthesis ceramic phase reinforced Fe-base cladding layer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Laser power 900W, Ti-Fe powder and B 4 C press response B 4 C+3Ti=2TiB 2 +TiC ratio

[0022] (1) Substrate pretreatment

[0023] Degrease and derust the working surface of the processed automobile die steel Cr12MoV substrate, and polish it with sandpaper to obtain a smooth and smooth surface;

[0024] (2) Laser cladding

[0025] In the composition ratio of the preset coating material, the percentages of the elements in the total material of the ferroboron powder, ferrosilicon powder, ferrochrome powder and iron powder accounting for the total weight of the four alloy powder materials are: B1.3%, Si1.2%, Cr11.3%, C0.1%, the balance Fe; and Ti30wt% titanium iron powder and B 4 The percentages of C powder in the total weight of all alloy powder materials are: 22.5% of Ti-Fe powder containing 30% Ti, B 4 C powder 2.5%; powder particle size is 80-120 mesh. After mixing the powder, mix it evenly and dry it. Adjust the laser cladding process parameters under the protect...

Embodiment 2

[0027] Laser power: 1200W, Ti-Fe powder and B 4 C press response B 4 C+3Ti=2TiB 2 +TiC ratio

[0028] (1) Substrate pretreatment

[0029] Degrease and derust the working surface of the processed automobile die steel Cr12MoV substrate, and polish it with sandpaper to obtain a smooth and smooth surface;

[0030] (2) Laser cladding

[0031] In the composition ratio of the preset coating material, the percentages of the elements in the total material of the ferroboron powder, ferrosilicon powder, ferrochrome powder and iron powder accounting for the total weight of the four alloy powder materials are: B1.3%, Si1.2%, Cr11.3%, C0.09%, balance Fe. And the ferrotitanium powder containing Ti29.1wt% and B 4 The percentages of C powder in the total weight of all alloy powder materials are: Ti-Fe powder 22.5% containing Ti29.1%, B 4 C powder 2.5%; powder particle size is 80-120 mesh. After mixing the powder, mix it evenly and dry it. Adjust the laser cladding process parameters un...

Embodiment 3

[0033] Laser power: 1500W, Ti-Fe powder and B 4 C press response B4 C+3Ti=2TiB 2 +TiC ratio

[0034] (1) Substrate pretreatment

[0035] Degrease and derust the working surface of the processed automobile die steel Cr12MoV substrate, and polish it with sandpaper to obtain a smooth and smooth surface;

[0036] (2) Laser cladding

[0037] In the composition ratio of the preset coating material, the percentages of the elements in the total material of the ferroboron powder, ferrosilicon powder, ferrochrome powder and iron powder accounting for the total weight of the four alloy powder materials are: B1.3%, Si1.1%, Cr10.7%, C0.12%, the balance Fe; and Ti30.7wt% titanium iron powder and B 4 The percentages of C powder in the total weight of all alloy powder materials are: 26.1% of Ti-Fe powder containing 30.7% Ti, B 4 C powder 2.2%; powder particle size is 80-120 mesh. After mixing the powder, mix it evenly and dry it. Adjust the laser cladding process parameters under the pr...

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Abstract

The invention relates to a laser cladding in-situ synthesis ceramic phase reinforced Fe-base cladding layer and a preparation method thereof, and belongs to the technical field of laser cladding. In-situ synthesis ceramic hard phases mainly comprise TiC, TiB2 and B4C. The coating is prepared according to the following steps of: firstly pretreating a base body; then proportioning alloy power in proportion by adopting a synchronous powder delivery laser cladding mode, and then sufficiently mixing and drying to use as a cladding material; regulating the process parameters of laser cladding in the presence of argon, wherein the cladding material carries out in-situ reaction under the irradiation of laser energy to generate a ceramic hard phase and shows good metallurgical bonding with the base body. The coating disclosed by the invention is compact in tissue without pores or cracks, achieves the large microhardness value more than 1000 HV and has very good application prospect in the field of laser surface modification.

Description

technical field [0001] The invention belongs to the laser cladding technology, in particular to a laser cladding in-situ synthetic ceramic phase reinforced Fe-based cladding layer and a preparation method thereof. Background technique [0002] Due to the unique and excellent properties of lasers, lasers have been widely used in scientific and technological research and industrial production since they were successfully developed in the middle of the 20th century. Laser surface modification is a new application of laser in the field of surface technology. According to different laser energy densities and different processing methods, the typical methods in laser surface technology include laser cladding, laser phase transformation hardening, laser shock strengthening, and laser surface alloying. The purpose of these methods is to make the working surface obtain properties such as high hardness, high wear resistance and high corrosion resistance that the base material cannot ...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 乔虹李庆棠符寒光蒋业华雷永平刘洪喜
Owner BEIJING UNIV OF TECH
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