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A preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer

A technology of laser cladding and in-situ synthesis, applied in coating, metal material coating process, etc., can solve the problem that the improvement of hardness, wear resistance, and thermal erosion resistance is not enough to meet the requirements, the interface is not well bonded, and there is a problem. Pollution and other problems, to achieve the effect of simple production equipment and process, easy to realize automation and convenient operation

Active Publication Date: 2019-07-12
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The key technical problem to be solved by the present invention is: aiming at the deficiencies in existing pure copper surface strengthening, such as: there is pollution, the improvement of hardness, wear resistance and heat erosion resistance is not enough to meet the requirements, and the interface is not well bonded, etc. A laser cladding in-situ synthetic ceramic phase-reinforced copper-based cladding layer preparation method is proposed to solve the problem of pure copper surface strengthening

Method used

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  • A preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer
  • A preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer
  • A preparation method of laser cladding in-situ synthesis ceramic phase reinforced copper-based cladding layer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Laser power 1600W, HfO 2 79.47 grams, B 4 C 6.95 grams, Al is 13.58 grams, carry out proportioning according to following reaction:

[0041] 3HfO 2 +B 4 C+4Al=2Al 2 o 3 +2HfB 2 +HfC;

[0042] i.e. HfO 2 79.47wt.%, B 4 C 6.95wt.%, Al 13.58wt.%;

[0043] Among them, HfO 2 、B 4 The sum of the content of C and Al accounts for 30wt.% of the total cladding powder mass;

[0044] Nickel powder accounts for 35wt.% (100.37 grams), copper powder accounts for 35wt.% (105 grams), the B 4 C is nickel-coated boron carbide powder, wherein, B 4 The mass percentage of C powder is 60wt.%, 11.58 grams of nickel-coated boron carbide powder;

[0045] (1) Substrate pretreatment

[0046] The working surface of the pure copper substrate is polished with sandpaper, degreased, derusted, and cleaned to obtain a clean surface with a roughness of Ra6.3, and then blackened. plain ink;

[0047] (2) Preparation of cladding powder

[0048] According to the molar ratio of the reaction...

Embodiment 2

[0059] Laser power 2400W, HfO 2 Powder, B 4 C powder, Al powder according to the following reaction ratio:

[0060] 3HfO 2 +B 4 C+4Al=2Al 2 o 3 +2HfB 2 +HfC

[0061] HfO 2 79.47 grams, B 4 C 6.95g, Al 13.58g;

[0062] 100.37 grams of nickel powder, 105 grams of copper powder, the B 4 C is nickel-coated boron carbide powder, wherein, B 4 The mass percentage of C powder is 60wt.%, 11.58 grams of nickel-coated boron carbide powder;

[0063] (1) Substrate pretreatment

[0064] The working surface of the pure copper substrate is polished with sandpaper, degreased, derusted, and cleaned to obtain a clean surface with a roughness of Ra6.3, and then blackened. plain ink;

[0065] (2) Preparation of cladding powder

[0066] According to the molar ratio of the reaction, it is converted into a mass ratio, weighed, and proportioned. The cladding powder includes 105 grams of commercially available copper powder, 100.37 grams of commercially available nickel powder, 13.58 g...

Embodiment 3

[0073] Laser power 1600W, HfO 2 Powder, B 4 C powder, Al powder, HfO 2 79.47 grams, B 4 C 6.95 grams, Al is 13.58 grams, carry out proportioning according to following reaction:

[0074] 3HfO 2 +B 4 C+4Al=2Al 2 o 3 +2HfB 2 +HfC;

[0075] i.e. HfO 2 79.47wt.%, B 4 C 6.95wt.%, Al 13.58wt.%;

[0076] Among them, HfO 2 、B 4 The sum of the content of C and Al accounts for 20wt.% of the total cladding powder mass;

[0077] Nickel powder accounts for 40wt.% (195.37 grams), and copper powder accounts for 40wt.% (200 grams); The B 4 C is nickel-coated boron carbide powder, wherein, B 4 C powder mass percentage is 60wt.%;

[0078] (1) Substrate pretreatment

[0079] The working surface of the pure copper substrate is polished with sandpaper, degreased, derusted, and cleaned to obtain a clean surface with a roughness of Ra6.3, and then blackened. plain ink;

[0080] (2) Preparation of cladding powder

[0081] According to the molar ratio of the reaction, it is conv...

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Abstract

The invention discloses a preparation method of an in-situ synthesized ceramic phase-enhanced copper-based cladding layer by utilizing laser cladding, and relates to the technical field of laser additive manufacturing. The preparation method comprises the following steps: firstly, performing pretreatment on a substrate; secondly, proportioning the raw materials according to the mole ratio of the reaction equation by adopting a synchronous powder feeding laser cladding method, and fully mixing and drying the raw materials to serve as cladding materials; and finally, under the protection of argon, regulating the laser cladding technological parameters, enabling the cladding materials to be subjected to in-situ reaction under the action of laser beams to generate a three-phase ceramic composite coating after being better metallurgically bonded with the pure copper substrate. According to the preparation method of the in-situ synthesized ceramic phase-enhanced copper-based cladding layer by utilizing laser cladding, the prepared copper-based cladding layer has a dense structure without air holes and cracks, the microhardness reaches HV0.2600 or above, and a better application prospect in the technical field of laser additive manufacturing is further achieved.

Description

technical field [0001] The invention relates to a method for preparing a laser cladding in-situ synthesized ceramic phase-reinforced copper-based cladding layer, belonging to the technical field of laser additive manufacturing. Background technique [0002] Copper and its alloys are widely used in electric power, metallurgy, machinery, aviation, aerospace and other fields because of their excellent electrical conductivity, high thermal conductivity and good plasticity. However, parts that work under harsh conditions, such as continuous casting molds, blast furnace tuyere, etc., require low deformation, high wear resistance, low friction coefficient, etc., and copper and its alloys are difficult to directly meet engineering requirements. In particular, when copper materials slide with other materials (such as metal) or self-matching pairs under the condition of no lubricating medium, the friction coefficient is very high, and severe adhesive wear is caused, which greatly limi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F1/00C22C30/02C22C32/00
CPCB22F1/0003C22C30/02C22C32/0005C23C24/103
Inventor 战再吉杜凤彪曹海要王振春
Owner YANSHAN UNIV
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