A kind of recycling method of metal powder return material

A technology of metal powder and return material, which is applied in the field of recycling of metal powder return material, can solve the problems of increasing oxygen and nitrogen in molten steel, misjudging melting temperature, large specific surface area of ​​return material, etc., to achieve enhanced magnetic induction effect and easy pressing The effect of demolding and high recycling rate

Active Publication Date: 2022-07-12
中航迈特增材科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large specific surface area of ​​the returned material, the absorption of oxygen and nitrogen is serious, so the increase of oxygen and nitrogen in molten steel is serious during the smelting process, especially in non-vacuum smelting powder making;
[0008] (3) There are great safety hazards in the smelting process of returning material with master alloy or bulk bulk material: in vacuum smelting, the melting speed of returning material is slow and easy to agglomerate and bridge, resulting in the overhead phenomenon of the material in the melting crucible, which makes the operator Misjudgment of the smelting temperature will bring safety hazards such as molten steel piercing through the furnace and explosion;

Method used

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  • A kind of recycling method of metal powder return material
  • A kind of recycling method of metal powder return material
  • A kind of recycling method of metal powder return material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0032] Preparation example of volatile polymer material envelope:

[0033] Embodiments 1-8 prepare volatile polymer material envelopes according to the following formula in Table 1:

[0034]

[0035] The specific preparation process of embodiment 1-8 volatile polymer material envelope is:

[0036] According to the formula in Table 1, each raw material was added to the high-speed mixer, the temperature was raised to 75°C, the mixing time was 12 min, and the mixing was uniform; the uniformly mixed materials in the high-speed mixer were transferred to the internal mixer for internal mixing. , the temperature in the mixer is 140°C, and the mixing time is 25min; the material after mixing is sent to the extruder for extrusion, and the temperature of the extruder is 160°C; The material is calendered, stretched, and cooled by a calender, and the temperature of the roller of the calender is 170 ° C. During the calendering and stretching, the film thickness is measured until it reac...

Embodiment 9

[0040] Adopt the technical scheme of this application to carry out the recycling of GH3536 return material, and the specific method is as follows:

[0041] (1) Put the GH3536 return material of 0-15 microns and 53-250 microns into the mixer, and the mixer is mixed for 3 hours at a speed of 8 rpm, and the mixture is uniformly mixed into coarse powder;

[0042](2) Using the volatile polymer material package of Example 1 (the components are: polyethylene, polyvinyl chloride, zinc stearate, and paraffin), the coarse powder is coated to form a powder package, which volatilizes the polymer material. The quality of the package is less than 0.1%;

[0043] (3) Put the powder sleeve into a mold cavity with a diameter of φ50 and a height of 50 mm, and use a press with a pressure of 200 tons to mold the powder sleeve at a pressing rate of 2 times / min; press the returned material into a block shape cylinder;

[0044] (4) Directly smelting the returned block-shaped cylinder to obtain the ...

Embodiment 10

[0046] The same method as in Example 9 was used to recycle the GH3536 return material, except that "the volatile polymer material package of Example 1" was replaced with "the volatile polymer material package of Example 2".

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Abstract

The invention relates to a method for recycling metal powder return materials. The metal powder return material recycling method comprises the following steps: placing the returned materials in a mixer for mixing, and uniformly mixing them into coarse powder; Molecular material wrapping, coating the coarse powder to form a powder wrapping; placing the powder wrapping in the mold cavity, and using a 200-ton pressure press to mold the powder wrapping at a pressing rate of 2 times / min , the return material is pressed into a block; the block return material is directly smelted to obtain the finished product, without adding any master alloy or bulk bulk material, achieving more than 98% recycling. The method for recycling the returned material can realize the efficient recycling of the returned material, and can be directly smelted without matching the master alloy or bulk bulk material to achieve ultra-high recycling rate.

Description

technical field [0001] The invention relates to a recycling method for metal powder return material, and belongs to the technical field of metal powder preparation. Background technique [0002] Atomization powder technology is a process of using high-energy atomizing media (water, gas) to break molten metal into fine droplets, and then cool and solidify into solid powder. Atomized powder is widely used in traditional powder metallurgy, injection molding, laser cladding, additive manufacturing and other fields. The powder grades and particle size ranges applicable to different application fields are different. For example, in the traditional powder metallurgy field, powders of 0-75 μm are generally used; in the field of injection molding, powders of 0-20 μm are generally used; laser cladding usually uses 53 μm. -150μm powder; Additive manufacturing (i.e. 3D printing) typically uses 15-53μm powder. The general powder obtained by atomization milling is generally 0-250μm full...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/02B22F9/08C08L27/06C08L23/06C08L91/06C08K5/098
CPCB22F3/02B22F9/082C08L27/06C08L23/06C08L91/06C08K5/098Y02P10/25
Inventor 郑吉祥高正江马腾张飞陈欣杨环殷雷王伟
Owner 中航迈特增材科技(北京)有限公司
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