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A kind of iron-based alloy gradient cladding layer and its preparation method

A technology of iron-based alloy and cladding layer, applied in the field of iron-based alloy gradient cladding layer and its preparation, can solve the problems of not focusing on the transition of the hardness of the cladding layer and the substrate, excessive hardness, cracking and falling off of the cladding layer, etc.

Inactive Publication Date: 2018-05-15
LIAONING UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0002] In recent years, laser cladding technology has developed rapidly, and there are many experiments and explorations on the application of this technology to the surface of H13 steel. According to the current research, it is mainly inclined to find efficient cladding powders for cladding, such as special metal powder and Ceramic powder, etc., so as to obtain an ideal H13 steel surface cladding effect. This scheme does not focus on the phenomenon that the hardness transition between the cladding layer and the substrate is too large, so that the cladding layer will crack and fall off in practical applications. Phenomenon
Furthermore, the transition layer is selected, but the selected cladding material cannot achieve a more economical and feasible effect

Method used

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  • A kind of iron-based alloy gradient cladding layer and its preparation method
  • A kind of iron-based alloy gradient cladding layer and its preparation method
  • A kind of iron-based alloy gradient cladding layer and its preparation method

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with examples.

[0021] Preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing, and concrete process step is:

[0022] (1) Select H13 steel that has been oil-cooled and quenched and high-temperature tempered as the base material, with a size of φ100mm×10mm and a surface roughness of Ra=0.18μm. The powder is FJ-1 iron-based alloy powder, iron-based alloy powder No. 1 and high-chromium iron-based alloy powder. The composition is shown in Table 1. The particle size of the three powders is -100+270. The surface of the substrate was polished with sandpaper, washed with absolute ethanol, dried and coated with laser absorbing material, and the substrate and powder were dried for 8 hours for later use.

[0023] Table 1 Composition of iron-based alloy powder

[0024]

[0025] (2) The PERCITEC YC52 laser head is carried out by the KUKA robotic a...

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Abstract

The invention relates to a metal surface cladding layer and a preparation method thereof, in particular to an iron-base alloy gradient cladding layer and a preparation method thereof. The cladding layer is composed of a bottom cladding layer, a sandwiched cladding layer and a top cladding layer sequentially arranged on a base body, the three cladding layers are obtained by cladding of three kinds of different iron-base alloy powder layer by layer, and the three kinds of iron-base alloy powder comprise FJ-1 powder, first iron-base alloy powder and high-ferrochromium-base alloy powder; when the cladding layer is prepared, each kind of powder undergoes laser cladding according to specific process parameters, the inter-layer laser stopping time is 10 minutes, inter-layer laser scanning paths are perpendicular, and finally the gradient cladding layer with the cladding thickness being 2.75 mm and the surface hardness being 60 HRC can be formed. The cladding layer is mainly characterized in that the microhardness values of the three layers are not uniform. The gradient cladding layer technology is applied to the wear area of steel work-pieces H13 for repair and is wide in application prospect of fast forming components on the steel work-pieces H13.

Description

technical field [0001] The invention relates to a metal surface cladding layer and a preparation method thereof, in particular to an iron-based alloy gradient cladding layer and a preparation method thereof. Background technique [0002] In recent years, laser cladding technology has developed rapidly, and there are many experiments and explorations on the application of this technology to the surface of H13 steel. According to the current research, it is mainly inclined to find efficient cladding powders for cladding, such as special metal powder and Ceramic powder, etc., so as to obtain an ideal H13 steel surface cladding effect. This scheme does not focus on the phenomenon that the hardness transition between the cladding layer and the substrate is too large, so that the cladding layer will crack and fall off in practical applications. Phenomenon. Furthermore, the transition layer is selected, but the selected cladding material cannot achieve a more economical and feasib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C38/44C22C38/04C22C38/02
CPCC22C38/02C22C38/04C22C38/44C23C24/106
Inventor 张德强考锡俊
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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