High-entropy alloy powder for 3D (three-dimensional) printing and method for preparing high-entropy alloy coating by using high-entropy alloy powder
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A high-entropy alloy and 3D printing technology is applied in the field of high-entropy alloy powder and preparation of high-entropy alloy coating to achieve the effects of fine grains, improved operability, and low element burnout rate
Active Publication Date: 2015-08-19
HARBIN ENG UNIV
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There are few reports on the use of high-entropy alloy powders for 3D printing
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specific Embodiment approach 1
[0014] Specific Embodiment 1: The high-entropy alloy powder used for 3D printing in this embodiment consists of Ni: 16%-25%, Co: 16%-25%, Cr: 16%-25%, Ti: 16 %~25% and V: 16%~25% composition.
specific Embodiment approach 2
[0015] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the high-entropy alloy powder used for 3D printing consists of Ni: 18%-22%, Co: 18%-22%, and Cr: 18% by atomic percentage. %~22%, Ti: 18%~22% and V: 18%~22%.
specific Embodiment approach 3
[0016] Specific embodiment three: In this embodiment, the method for preparing a high-entropy alloy coating using high-entropy alloy powder is realized in the following steps:
[0017] 1. Ni is weighed according to the atomic percentage of 16% to 25% of Ni, 16% to 25% of Co, 16% to 25% of Cr, 16% to 25% of Ti and 16% to 25% of V Powder, Co powder, Cr powder, Ti powder and V powder are used as raw materials, and then the raw materials are placed in a ball mill for ball milling to obtain a mixed powder;
[0018] 2. Use sandpaper to smooth the surface of the substrate, then use absolute ethanol and acetone to clean the polished substrate in turn, and sandblast roughening to obtain a roughened substrate;
[0019] 3. Put the mixed powder obtained in step 1 into the powder feeder of the 3D printing equipment, adopt the laser selective sintering method, control the laser output power P = 500 ~ 700W, and the spot diameter D = 4 ~ 6mm, after roughening A high-entropy alloy coating is ...
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Abstract
The invention provides high-entropy alloy powder for 3D (three-dimensional) printing and a method for preparing a high-entropy alloy coating by using the high-entropy alloy powder, and belongs to the technical field of coating preparation. By the high-entropy alloy powder, the wear resistance of the existing powder materials for 3D printing is improved. The high-entropy alloy powder is prepared by using the following ingredients in atomic percentage by weight: 16%-25% of Ni, 16%-25% of Co, 16%-25% of Cr, 16%-25% of Ti and 16%-25% of V. The preparation method comprises the following steps of (1) performing ball-mill mixing on raw materials to obtain mixed powder; (2) grinding and cleaning a matrix; and (3) placing the mixed powder in a powder feeder of 3D printing equipment and sintering the mixed powder on the surface of the matrix to form the high-entropy alloy coating by using selective laser. The NiCoCrTiV coating is prepared by selective laser sintering and has the advantages of high hardness, wear resistance, corrosion resistance and the like. The high-entropy alloy powder for 3D printing and the method for preparing the high-entropy alloy coating by using the high-entropy alloy powder can be widely used in the field of 3D printing.
Description
technical field [0001] The invention belongs to the technical field of coating preparation, and in particular relates to a high-entropy alloy powder used for 3D printing and a method for preparing a high-entropy alloy coating. Background technique [0002] High-entropy alloys have higher entropy values and the characteristics that atoms are not easy to diffuse, and it is easy to obtain solid solution phases and nanostructures with high thermal stability, and even amorphous structures, and their performance is superior to traditional alloys. Multicomponent high-entropy alloys are a newly developed alloy system with high academic research value and great potential for industrial development. Similarly, the high-entropy alloy coating also has good high-temperature oxidation resistance and corrosion resistance, and is a potential high-performance coating system that can be used in some harsh environments. [0003] 3D printing, a type of rapid prototyping technology, is a tech...
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