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Laser-cladding powder

A laser cladding and powder technology, which is applied in the coating, metal material coating process, etc., can solve the problems of cladding layer cracks falling off, lack of cladding materials, etc., achieve fine molten pool, ensure cladding effect, and save production cost effect

Pending Publication Date: 2019-01-18
马鞍山市申马机械制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem in the prior art that the cast iron substrate lacks suitable cladding materials during laser cladding, and the cladding layer is prone to cracks and falls off, the present invention provides a laser cladding powder

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] A laser cladding powder of this embodiment is composed of the following components and their mass percentages: Cr is 15% to 17%, C is 0.25% to 0.42%, Si is 2.1% to 3.1%, and B is 1.7% to 3.1%, the balance is Fe and unavoidable impurities. Specifically, the laser cladding powder in this embodiment is composed of the following components and their mass percentages: Cr is 17%, C is 0.42%, Si is 2.1%, B is 1.9%, and the balance is Fe and unavoidable impurities .

[0043] The laser cladding powder of this embodiment is an amorphous powder, and the steps of the preparation method of the laser cladding powder of this embodiment are as follows:

[0044] 1. Ingredients: According to the mass percentage in the formula, the corresponding alloying elements are prepared into mixed powder; each component is prepared with a powder whose purity is greater than or equal to 99%;

[0045] 2. Smelting: The prepared mixed powder is smelted in vacuum multiple times, and the smelting proces...

Embodiment 2

[0054] A laser cladding powder of this embodiment is composed of the following components and their mass percentages: Cr is 17%, C is 0.42%, Si is 2.1%, B is 1.9%, and the balance is Fe and unavoidable impurities . The laser cladding powder preparation method of this embodiment is the same as that of Example 1, and the laser cladding process is the same as that of Example 1. The process parameters are as follows, the laser power is 1500W, the spot diameter is 5mm, the cladding speed is 300mm / min, and the powder feeding speed is 32mg / s.

[0055] The hardness of the cladding layer obtained from the laser cladding powder in this implementation is 61.5HRC. After the wear test under the same experimental conditions, the weight loss of the cladding layer is 4.0mg. The wear resistance is slightly worse than that of Example 1, and the corrosion resistance is basically the same as that of Example 1. 1.

Embodiment 3

[0057] A laser cladding powder of this embodiment is composed of the following components and their mass percentages: Cr is 17%, C is 0.42%, Si is 2.1%, B is 2.4%, and the balance is Fe and unavoidable impurities . The laser cladding powder preparation method of this embodiment is the same as that of Example 1, and the laser cladding process is the same as that of Example 1. The process parameters are as follows, the laser power is 1500W, the spot diameter is 5mm, the cladding speed is 200mm / min, and the powder feeding speed is 32mg / s.

[0058] The hardness of the cladding layer obtained from the laser cladding powder in this implementation is 61.5HRC. After the wear test under the same experimental conditions, the weight loss of the cladding layer is 4.1 mg. The wear resistance is slightly worse than that of Example 1, and the corrosion resistance is basically the same as that of Example 1. 1.

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Abstract

The invention discloses laser-cladding powder and belongs to the field of cladding materials. The laser-cladding powder disclosed by the invention is prepared from the following components in percentage by mass: 14 to 17 percent of Cr, 0.25 to 0.42 percent of C, 2.1 to 3.1 percent of Si, 1.7 to 3.1 percent of B, 2 to 5 percent of Ni and the balance of Fe and unavoidable impurities; when the mass percent of Cr is 15 to 17 percent, Fe with the mass percent which is the same as that of Ni is used for replacing Ni; each component is powder with the purity which is greater than or equal to 99 percent; the granularity of the laser-cladding powder is 45 to 50microns; the laser-cladding powder is amorphous-state powder. When the laser-cladding powder is used for carrying out laser welding, technological parameters are as follows: the laser power is 1400 to 1600W, the light spot diameter is 5mm, the laser cladding speed is 200 to 350mm / min and the powder feeding speed is 30 to 42mg / s; a claddedmatrix is casting iron. The laser-cladding powder provided by the invention has very good metallurgy compatibility with the casting iron; compared with an existing cladding layer formed by laser-cladding powder, higher rigidity, wear resistance and corrosion resistance are achieved, and the preparation cost is lower.

Description

technical field [0001] The invention relates to the field of cladding materials, in particular to a laser cladding powder. Background technique [0002] Laser cladding refers to placing the selected coating material on the surface of the cladding substrate in different ways of adding materials, irradiating it with laser to melt it and the thin layer of the substrate surface at the same time, and forming a very low dilution after rapid solidification, which is similar to The substrate is formed into a metallurgically bonded surface coating, which is used to improve the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the substrate surface, so as to achieve the purpose of surface modification or repair. [0003] The performance of the laser cladding layer is affected by many factors, and the laser cladding material and laser cladding process parameters are one of the main factors. Laser cladding materials must not only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/34C22C38/54C22C38/32
CPCC22C38/32C22C38/34C22C38/54C23C24/106
Inventor 方钊
Owner 马鞍山市申马机械制造股份有限公司
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