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Method for recycling wastes of high-temperature alloy powder

A superalloy and scrap recycling technology, applied in the field of superalloy powder recycling, can solve the problems of large elastic after-effect, mold deformation and damage, and achieve the effects of low hardness, low cost and fast forming

Active Publication Date: 2019-11-05
江苏奇纳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the general pressure cannot withstand the pressure of superalloy powder forming
Due to the high hardness and high strength of superalloys, the elastic aftereffect is large
After testing 200MPa cold isostatic pressing and 400MPa molding, the briquette will be loose when it is released from the mold, and the mold will be deformed and damaged during the pressing process
[0004] In addition, in the field of high-hardness cemented carbide, adhesives are often used for bonding and then pressure-molded. Commonly used adhesives include paraffin, rubber, polyethylene glycol, and glycerol. No matter which adhesive is used, although It can play a role in forming, but it cannot be completely removed in the later heating process

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0019] This embodiment provides a waste recovery method of 18Ni300 superalloy powder. The nominal composition of 18Ni300 superalloy powder is as follows:

[0020] Table 1

[0021]

[0022] Firstly, 18Ni300 is sieved, and the powder with a particle size between 15μm and 53μm is sieved and recovered. The powder with a particle size less than 15μm and a particle size greater than 53μm is 18Ni300 waste.

[0023] Then, the scrap of 18Ni300 and the iron powder with a particle size of less than 75μm (the pure metal powder of the base of 18Ni300) are mixed uniformly in a weight ratio of 8:2 to obtain the first powder mixture.

[0024] Select a single mold to produce a mold with a diameter of Φ40mm and a height of 20mm, and a press with a pressure of 315 tons to mold the first powder mixture at a pressing rate of 4 times / min.

[0025] Then, according to the composition requirements in Table 1, other components other than iron powder are added to the above-mentioned compression-molded first powde...

Embodiment approach 2

[0028] This embodiment provides a waste recovery method of the superalloy powder of the brand CoCrW. The nominal composition of the superalloy powder of the brand CoCrW is shown in Table 2:

[0029] Table 2

[0030]

[0031] First, the CoCrW superalloy powder is sieved, and the powders with a particle size between 15μm and 53μm are sieved and recovered. The powders with a particle size less than 15μm and a particle size greater than 53μm are the waste of CoCrW superalloy powder.

[0032] Then, the scrap of 18Ni300 superalloy powder and cobalt powder (the pure metal powder of the base of CoCrW superalloy powder) with a particle size of less than 150 μm are uniformly mixed in a weight ratio of 9:1 to obtain a first powder mixture.

[0033] Select a single mold to produce a mold with a diameter of Φ40mm and a height of 20mm, and a 315-ton pressure press to mold the first powder mixture at a pressing rate of 6 times / min.

[0034] Then, in accordance with the composition requirements in Tabl...

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Abstract

The invention relates to the technical field of recycling of high-temperature alloy powder, and discloses a method for recycling wastes of high-temperature alloy powder. The method comprises the following steps: selecting and blending pure metal powder of high-temperature alloy matrix elements with proper granularity and proportion into the wastes of the high-temperature alloy powder according todifference of high-temperature alloy powder matrixes; conducting uniform mixing and then carrying out compression molding; then calculating the amount of other elements required to be added into the powder subjected to compression molding according to the proportion of the original high-temperature alloy powder and the amount of the added matrix pure metal powder; and conducting remelting and casting to obtain a bar material which is the same as finished high-temperature alloy powder. According to the method, by properties of low hardness and low yield strength of the pure metal powder of thematrixes of the high-temperature alloy, a forming effect is achieved in a room-temperature pressure forming process. Since any binder is not used and other impurity elements are not introduced, the high-temperature alloy powder which cannot be directly used can be effectively recycled through the process, and the powder forming efficiency is improved.

Description

Technical field [0001] The invention relates to the technical field of high-temperature alloy powder recovery, in particular to a waste recovery method of high-temperature alloy powder. Background technique [0002] Superalloy 3D printing is a new technology that has flourished in recent years, mainly used in high-end industries such as heat-resistant and high-strength mold industry, medical equipment, aerospace and so on. With the upgrading of my country's traditional industries and gradually catching up with the advanced level of foreign countries, these high-end industries have more and more demand for superalloy 3D printing. Among them, superalloy powder is one of the core technologies of superalloy 3D printing. The diameter of the powder used in conventional 3D printing is 15μm to 53μm, so about 50% of the superalloy powders smaller than 15 microns and larger than 53 microns cannot be used directly and need to be recycled. However, the superalloy powder cannot be remelted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/08B22F3/03C22B9/16C22C19/07C22C38/04C22C38/10C22C38/12C22C38/14
CPCB22F3/03C22B9/16C22C19/07C22C38/002C22C38/04C22C38/105C22C38/12C22C38/14
Inventor 彭伟平张凯彭凌剑薛丹斌周志坚杨华兴金开锋吴闯
Owner 江苏奇纳新材料科技有限公司
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