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Preparation method of additive material

A cladding and conditional technology, applied in the field of additive manufacturing, can solve the problems of easy cracking in the transition interface, poor interlayer adhesion, low service life, etc., achieve controllability and reliability, increase strength, and resist. The effect of increased abrasiveness

Pending Publication Date: 2022-04-12
恒新增材制造研究中心(佛山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, in order to solve the problems of poor interlayer bonding force and easy cracking at the transition interface in the gradient cladding coating in the prior art, resulting in low service life and easy mold sticking, the present invention provides a preparation of additive materials method, the specific technical scheme is as follows:

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  • Preparation method of additive material

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preparation example Construction

[0023] A method for preparing an additive material in an embodiment of the present invention includes the following steps:

[0024] Carrying out annealing treatment to the substrate layer, after slow cooling, pretreatment, and standby;

[0025] Under the first cladding condition, cladding Ni alloy powder on the base layer to obtain a sandwich layer;

[0026] Under the second cladding condition, the gradient metal powder is clad on the sandwich layer to obtain a gradient layer, and beating treatment is required during the process;

[0027] Recycling the gradient metal powder, cleaning the surface of the gradient layer, and then performing tempering treatment and surface treatment to obtain additive materials;

[0028] Wherein, the surface treatment is: using Al powder, Co powder, Cr powder, Cu powder, Fe powder and Ni powder in equimolar ratio to form a film layer by DC magnetron sputtering method.

[0029] In one of the embodiments, the base layer is a steel base.

[0030] ...

Embodiment 1

[0056] A method for preparing an additive material, comprising the steps of:

[0057] Anneal the steel substrate at 1100°C for 100s, after slow cooling, clean and dry the surface of the steel substrate, heat it to 300°C, and keep it warm for later use;

[0058] Under the conditions of power of 1200W, scanning speed of 550mm / min, light spot of 2mm, powder feeding rate of 1.2r / min, carrier gas volume of 4L / min, and Ar gas flow rate of 15L / min, the Ni alloy powder was melted. Overlay on the steel matrix to obtain a sandwich layer with a thickness of 0.5mm;

[0059] The Co powder, Cr powder, Cu powder, Fe powder, and Ni powder are prepared according to the molar ratio of 1:1:1:1:1 to obtain a gradient metal powder. The power is 1300W and the scanning speed is 600mm / min. The light spot is 2mm, the carrier gas volume is 4L / min, and the gradient metal powder is cladding on the described sandwich layer under the condition that the gas flow rate of Ar gas is 15L / min, and the formation...

Embodiment 2

[0063] A method for preparing an additive material, comprising the steps of:

[0064] Anneal the steel substrate at 1000°C for 160s, after slow cooling, clean and dry the surface of the steel substrate, heat it to 300°C, and keep it warm for later use;

[0065] Under the conditions of power of 1200W, scanning speed of 600mm / min, light spot of 2mm, powder feeding rate of 1.2r / min, carrier gas volume of 4L / min, and Ar gas flow rate of 15L / min, the Ni alloy powder was melted Overlay on the steel matrix to obtain a sandwich layer with a thickness of 0.5mm;

[0066] The Co powder, Cr powder, Cu powder, Fe powder, and Ni powder are prepared according to the molar ratio of 1:1:1:1:1 to obtain a gradient metal powder. The power is 1300W and the scanning speed is 600mm / min. The light spot is 2mm, the carrier gas volume is 4L / min, and the gradient metal powder is cladding on the described sandwich layer under the condition that the gas flow rate of Ar gas is 15L / min, and the formation ...

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Abstract

The invention provides a preparation method of an additive material, which comprises the following steps: carrying out annealing treatment and slow cooling on a matrix layer, and then carrying out pretreatment for later use; under a first cladding condition, cladding Ni alloy powder on the matrix layer to obtain a sandwich layer; under the second cladding condition, gradient metal powder is cladded on the sandwich layer, a gradient layer is obtained, and hammering treatment needs to be conducted in the process; and the gradient metal powder is recycled, the surface of the gradient layer is cleaned, then tempering treatment and surface treatment are conducted, and the additive material is obtained. The sandwich layer, the gradient layer and the film layer are arranged on the base body layer, a structure capable of effectively relieving thermal stress is formed, the overall strength and abrasion resistance of the additive material are obviously improved, the situation of cracking caused by stress constraint between cladding layers is avoided, and the use stability is high; in addition, the film layer can further improve the strength, the heat stability and the wear resistance of the additive material, the mold sticking phenomenon of the additive material is obviously reduced, and the whole additive material has wider usability.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a method for preparing additive materials. Background technique [0002] In the die-casting molding process, the mold is subjected to periodic heating and cooling, and is scoured and corroded by hot metal sprayed at high speed, and bears impact, vibration, friction, high pressure, stretching, bending and torsion loads, even at relatively high temperatures Work, the working conditions are complicated, and problems such as mold surface cracking, severe plastic deformation, and wear failure are prone to occur. In the prior art, the gradient cladding coating can continuously change the composition of the material to avoid sudden changes in the properties of the cladding layer and the substrate, thereby obtaining lower stress, defects and fracture tendencies. However, the gradient cladding coating in the prior art has the problems of poor interlayer bonding force and prone to cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02B22C3/00C23C24/10C23C14/35C23C14/16C21D1/26B22D17/22B33Y10/00B33Y70/00
Inventor 林惠娴王凯
Owner 恒新增材制造研究中心(佛山)有限公司
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