Method for controlling microstructure and hot crack sensibility of laser cladding coating

A technology of microstructure and laser cladding, which is applied in the direction of coating, metal material coating process, etc., can solve the problems that there is no method to control the cracks of laser cladding coating, and achieve good effect, simple operation and reliable highly operable effect

Active Publication Date: 2016-04-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the prior art does not provide a method that can well control the cracks of the laser cladding coating.

Method used

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  • Method for controlling microstructure and hot crack sensibility of laser cladding coating
  • Method for controlling microstructure and hot crack sensibility of laser cladding coating
  • Method for controlling microstructure and hot crack sensibility of laser cladding coating

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Embodiment Construction

[0038] Such as figure 1 and 2 As shown, a preferred embodiment of the present invention provides a method for controlling the microstructure and thermal crack sensitivity of laser cladding coatings, comprising the following steps:

[0039] Step 1, providing the laser head 1; placing the material 6 for cladding on the surface of the substrate 4;

[0040] Step 2, the laser head emits a high-energy laser beam 2, cladding the material 6 for cladding on the surface of the substrate 4, forming a molten pool 5, and the molten pool 5 solidifies to form a cladding coating 3; wherein, in the cladding process In the process, the laser head 1 is rotated so that the incident angle of the laser light is not perpendicular to the substrate 4, and the incident angle of the laser light is changed.

[0041] Step 3, the change of the incident angle of the laser changes the morphology and temperature field of the molten pool 5, thereby changing the microstructure and growth orientation of the cl...

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Abstract

The invention discloses a method for controlling the microstructure and the hot crack sensibility of a laser cladding coating, comprising the following steps: changing the incident angle of laser during laser cladding so as to change the microstructure and the growth orientation of the cladding coating, and further change the hot crack initiation resistance of the cladding coating, and achieve the purpose of controlling forming of the cladding hot cracks. The method for controlling microstructure and hot crack sensibility of laser cladding coating can effectively control the microstructure and the hot crack sensibility of the cladding coating by changing the incident angle of the laser, is simple in operation, strong in operability and good in effect, is suitable for the preparation process of various laser cladding coatings, and is particularly applicable to laser cladding of nickel-base superalloy.

Description

technical field [0001] The invention relates to the field of laser cladding coatings, in particular to a method for controlling the microstructure and thermal crack sensitivity of laser cladding coatings. Background technique [0002] Laser cladding is a new type of additive technology, which uses a laser beam with a certain power density to act on the powder material pre-coated on the metal surface or fed in synchronously, so that the material and the surface of the metal substrate are melted, and the subsequent cooling During the solidification process, a cladding layer with a low dilution rate and good metallurgical bonding is formed on the surface of the metal substrate to achieve the purpose of material surface repair or additive manufacturing. Compared with traditional surface repair technology, laser cladding technology has the following advantages: [0003] (1) The dilution rate of the base material is low, generally below 5%, and the cladding layer and the base mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/10C23C24/103
Inventor 陈源李铸国姚成武
Owner SHANGHAI JIAO TONG UNIV
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