Preparation method for stainless steel 3D printing powder and product of stainless steel 3D printing powder

A 3D printing and stainless steel technology, which is applied in the field of preparation of stainless steel 3D printing powder, can solve the problem of high cost of 3D printing powder, and achieve the effect of high ball forming performance, excellent surface hydrophilicity and good viscosity

Active Publication Date: 2020-01-10
XIANGYA HOSPITAL CENT SOUTH UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of 3D printing powder prepared by this method of using pure metal materials is relatively high

Method used

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  • Preparation method for stainless steel 3D printing powder and product of stainless steel 3D printing powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Pretreatment of ketone smelting slag and laterite nickel ore: Copper smelting slag is combined with ball milling and high-pressure roller milling, so that the particle size is less than 0.074mm, accounting for more than 80%, and the specific surface area is not less than 1500cm 2 / g. The laterite nickel ore is ball-milled until more than 80% of the particle size is less than 0.074mm.

[0037] 2) Pelletizing: mix copper smelting slag, laterite nickel ore and quicklime according to the mass percentage of 65:5:30, then add water equivalent to 8.5% of the total mass of raw materials, mix well, and place in a disc pelletizer Perform pelletizing for 13 minutes to prepare green pellets with a particle size of 8-16 mm. The measured drop strength of green balls is 3.4 times / 0.5m, the compressive strength of green balls is 8.5N / piece, and the bursting temperature of green balls is 265°C.

[0038] 3) Preheating: dry the green balls on a grate machine (the height of the green ...

Embodiment 2

[0046] 1) Pretreatment of ketone smelting slag and laterite nickel ore: Copper smelting slag is combined with ball milling and high-pressure roller milling, so that the particle size is less than 0.074mm, accounting for more than 80%, and the specific surface area is not less than 1500cm 2 / g. The laterite nickel ore is ball-milled until more than 80% of the particle size is less than 0.074mm.

[0047]2) Pelletizing: batching according to the mass percentage of copper smelting slag, laterite nickel ore and quicklime is 65:5:30, then add water equivalent to 8.8% of the total mass of raw materials, mix well, and put them in the disc pelletizer Perform pelletizing for 12 minutes to prepare green pellets with a particle size of 8-16 mm. The measured drop strength of green balls is 4.4 times / 0.5m, the compressive strength of green balls is 10.2N / piece, and the bursting temperature of green balls is 295°C.

[0048] 3) Preheating: Dry the green balls on a grate machine (the height ...

Embodiment 3

[0055] 1) Pretreatment of ketone smelting slag and laterite nickel ore: Copper smelting slag is combined with ball milling and high-pressure roller milling, so that the particle size is less than 0.074mm, accounting for more than 80%, and the specific surface area is not less than 1500cm 2 / g. The laterite nickel ore is ball-milled until more than 80% of the particle size is less than 0.074mm.

[0056] 2) Pelletizing: According to the mass ratio of copper smelting slag, laterite nickel ore and quicklime, the mass ratio is 65:10:25, then add water equivalent to 9.2% of the total mass of raw materials, mix well, and put them in the disc pelletizer Perform pelletizing for 12 minutes to prepare green pellets with a particle size of 8-16 mm. The measured drop strength of green balls is 4.9 times / 0.5m, the compressive strength of green balls is 12.8N / piece, and the bursting temperature of green balls is 335°C.

[0057] 3) Preheating: Dry the green balls on a grate machine (the hei...

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Abstract

The invention discloses a preparation method for stainless steel 3D printing powder. The preparation method comprises the following steps of (1) performing pelletizing and preheating; (2) performing prereduction; (3) performing smelting separation; (4) performing electric furnace refining; (5) performing water atomization; and (6) performing hydrogen reduction to obtain the stainless steel 3D printing powder. According to the preparation method, the proportion of all components obtained after coreduction refining of copper smelting slag and laterite nickel ore is just within the range of the proportion of components of the stainless steel 3D printing powder, so that melted liquid obtained after refining is made into the stainless steel 3D printing powder after being directly atomized and reduced, and thereby, a copper-nickel-iron product obtained after coreduction refining can be prevented from further metal separation, the phenomenon a coarse raw material needs to be melted during proportioning of the stainless steel 3D printing powder can also be avoided, recycling of copper waste slag and low-grade laterite nickel ore is realized, and cost can be reduced to a large extent.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial waste residues, and in particular relates to a preparation method of stainless steel 3D printing powder and its products. Background technique [0002] In previous studies, it is generally believed that when the copper content in steel exceeds a certain content, it will increase the sensitivity to hot processing, cause hot embrittlement, cause scale defects in the product, and lead to product performance degradation. With extensive and in-depth research on copper alloying at home and abroad, it is found that an appropriate amount of copper in steel can improve the corrosion resistance and antibacterial properties of steel, increase the strength and impact toughness of steel, and improve the weldability, formability and machinability of steel. Wait. Therefore, in view of its excellent properties, more and more copper is added to steel as an alloying element to improve th...

Claims

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Application Information

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IPC IPC(8): C22C33/02B22F9/08B22F9/22B22F1/00C22C38/16C22C38/08C22B7/04C22B1/24C22B5/10C22B15/00C21B13/00B33Y70/00
CPCB22F1/0007B22F9/082B22F9/22B22F2009/0828B22F2009/0848B33Y70/00C21B13/0006C21B13/0066C22B1/24C22B5/10C22B7/001C22B15/0026C22C33/0271C22C38/08C22C38/16Y02P10/20
Inventor 廖魏魏郭正启潘建朱德庆李紫云梁钟仁
Owner XIANGYA HOSPITAL CENT SOUTH UNIV
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