Two-dimension gradient structure transition layer

A two-dimensional gradient and transition layer technology, used in coatings, metal material coating processes, melt spraying, etc. Peeling and other problems, to achieve the effect of good thermal stress consistency along the tangential direction, excellent comprehensive service performance of the coating, and good bonding strength of the coating

Active Publication Date: 2019-05-31
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The inventors found that the material compatibility of the existing transition layer shows a one-dimensional gradient change, which can effectively reduce the thermal stress between the traditional homogeneous coating and the substrate, but it is difficult for the tangentially ho

Method used

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  • Two-dimension gradient structure transition layer
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  • Two-dimension gradient structure transition layer

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specific Embodiment 1

[0041] Below in conjunction with specific embodiment 1, the present invention is described in detail:

Embodiment 1

[0043] Taking a certain type of blade as an example, the surface is thermally sprayed with Cr 3 C 2 -NiCr and NiCr composite tangential gradient coating, the technical scheme is as follows:

[0044] A two-dimensional gradient structure transition layer, the material compatibility of the transition layer changes along the normal direction and the tangential two-dimensional gradient.

[0045] The substrate is metal material FV520B, and the functional layer is Cr 3 C 2 -NiCr and NiCr composite material (Cr 3 C 2 -NiCr powder is mainly composed of Cr 3 C 2 It is composed of NiCr, its mass ratio is about 75:25, and its chemical composition is shown in Table 1; NiCr powder is mainly composed of Ni and Cr, its mass ratio is about 20:80, its chemical composition is shown in Table 2), and the transition layer is also Cr 3 C 2 -NiCr and NiCr composite materials, the material compatibility is characterized by the composite ratio.

[0046] Table 1 Cr 3 C 2 -NiCr powder chemical...

Embodiment 2

[0061] In this embodiment, the setting of the transition layer is the same as that of Embodiment 1, the difference is that a bonding layer is also set between the transition layer and the substrate to enhance the bond strength between the transition layer and the workpiece substrate, and the bonding layer adopts the existing The materials for the adhesive layer can be used, and will not be described in detail here.

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Abstract

The invention relates to a two-dimension gradient structure transition layer. A two-dimension gradient transition layer is introduced between a base body and a tangential gradual changing coating, andthe composite ratio of the transition layer is in two-dimension gradient changes in the normal direction and the tangential direction. Through the composite ratio normal-direction gradient changes ofthe transition layer, heat stress between the coating and the base body can be relieved, and through the composite ratio tangential-direction gradient changes of the transition layer, the differenceof the heat stress in the tangential direction is overcome.

Description

technical field [0001] The invention relates to the technical field of surface engineering, in particular to a transition layer with a two-dimensional gradient structure. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The material compatibility of the tangential gradient coating is gradually changed along the tangential direction of the surface of the part, which can meet the service performance differentiation requirements of different areas of the surface, such as figure 1 shown. However, when there are large differences in thermal physical properties such as thermal expansion coefficient, elastic modulus, and thermal conductivity between the tangential gradient coati...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06
Inventor 李方义鹿海洋李燕乐李剑峰冉学举杜际雨李振张兴艺王梓鉴徐长续
Owner SHANDONG UNIV
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