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Novel cladding alloy powder material with controllable thermal expansion and manufacturing method thereof

A technology for cladding alloys and powder materials, which is applied in the coating process and coating of metal materials, can solve problems such as cracks in cladding materials, achieve the effects of reducing thermal stress, simple preparation method, and reducing crack sensitivity

Inactive Publication Date: 2020-09-15
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of cracks caused by the thermal stress caused by the cladding material being generally larger than the matrix, the present invention provides a controllable thermal expansion composite powder and a method for preparing the cladding layer

Method used

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  • Novel cladding alloy powder material with controllable thermal expansion and manufacturing method thereof
  • Novel cladding alloy powder material with controllable thermal expansion and manufacturing method thereof

Examples

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preparation example Construction

[0023] A method for preparing a new cladding alloy powder with controllable thermal expansion, comprising the following steps: using a planetary ball mill to mix the above powder, setting the mixing time of the ball mill to 90-120 minutes, and the speed to 90-120r / min for powder mixing , to obtain a new cladding alloy powder material with controllable thermal expansion.

[0024] A method for preparing a new cladding alloy cladding layer with controllable thermal expansion, which meets the following steps:

[0025] (1) The new cladding alloy powder with controllable thermal expansion is uniformly mixed with absolute ethanol and preset on the 42CrMo matrix.

[0026] (2) Under the protection of high-purity argon gas, the cladding layer is formed by using a fiber laser.

[0027] In some embodiments, before the step (1), the substrate needs to be polished with coarse sandpaper to remove impurities such as rust and oil.

[0028] In some embodiments, the thickness of the preset pow...

Embodiment 1

[0036] The laser cladding composite powder of this embodiment is composed as follows by volume percentage: 30% ZrW 2 o 8 +70%NiCrBSi; matrix is ​​42CrMo.

[0037] The method of using the above raw material components to produce new cladding alloy powder and cladding layer with controllable thermal expansion for laser cladding is as follows:

[0038] Step 1: Put the mixed powder into a planetary ball mill, grind the above composite powder with alumina grinding balls, set the ball-to-material ratio to 3:1, the mixing time to 320min, and the speed of the ball mill to 120r / min. After powder mixing, use a drying oven for drying treatment. The temperature of the drying oven is set at 110°C, and the drying time is 320 minutes. After drying, a new type of cladding alloy powder with controllable thermal expansion for laser cladding is obtained.

[0039]Step 2: Use prefabricated powder spreading method, the thickness of the powder layer is 0.8mm-1mm.

[0040] Step 3: During laser cl...

Embodiment 2

[0042] The composition of the laser cladding composite powder in this embodiment is as follows by volume percentage:

[0043] 40%ZrW 2 o 8 +60%NiCrBSi

[0044] The matrix is ​​42CrMo.

[0045] The method for preparing a new type of cladding alloy powder and cladding layer with controllable thermal expansion for laser cladding is the same as that of Example 1.

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Abstract

The invention relates to a cladding alloy powder material with controllable thermal expansion and a manufacturing method thereof, and belongs to the technical field of green remanufacturing. By addingZrW2O8 powder with a certain volume fraction on the basis of nickel-based self-fluxing alloy powder, the purpose of controlling the thermal expansion coefficient of composite cladding powder is achieved. The cladding alloy powder material is prepared from the following raw materials in volume fraction: (1) 70% of NiCrBSi powder and 30% of ZrW2O8 powder; (2) 60% of NiCrBSi powder and 40% of ZrW2O8powder; (3) 50% of NiCrBSi powder and 50% of ZrW2O8 powder; and (4) 40% of NiCrBSi powder and 60% of ZrW2O8 powder. The surface of 42CrMo steel is clad with the novel cladding alloy powder through alaser cladding technology, the novel cladding alloy powder is well bonded with a substrate interface, and a cladding layer is free of cracks. The thermal expansion coefficient of the cladding powder can be effectively controlled, and thus the crack problem caused by thermal stress in the cladding process is reduced; and meanwhile, the cladding layer formed by the composite cladding powder preparedby the method has the small friction coefficient.

Description

technical field [0001] The invention belongs to the technical field of green remanufacturing and cladding materials, and in particular relates to a new cladding alloy powder material with controllable thermal expansion and a method for laser cladding the material, so that the cladding layer prepared from the material has a small thermal expansion coefficient , lower thermal stress and better friction properties. 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] As a rapidly developing remanufacturing technology, laser cladding has become an important development direction for engineering equipment repair because of its small heat-affected zone, small thermal deformation, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00
CPCB22F1/0003C23C24/103
Inventor 杨勇齐康
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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