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Metal material atomization powder preparation method based on laser melting

A metal material and atomization powder making technology, which is applied in the field of metal material crushing operations, can solve problems such as particle size distribution of difficult powders

Inactive Publication Date: 2019-01-01
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in the traditional atomization powder making process, the size of the melt is in a random state, and it is difficult to control the particle size distribution of the powder, so the particle size distribution of the powder is relatively random. The present invention provides a solution to the above problems The atomization powder making method of metal materials based on laser melting, the atomization powder making method with laser as the heat source proposed in the present invention can precisely control the size of the melt, and further achieve the purpose of controlling the particle size of the powder and improving the sphericity

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  • Metal material atomization powder preparation method based on laser melting

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Embodiment 1

[0029] This embodiment provides a metal material atomization powder making method based on laser melting, such as figure 1 As shown, the specific operation is as follows:

[0030] Step 1, first preheating the base metal 1;

[0031] Step 2, using the laser beam 3 as a heat source, the radiation transfers heat to the surface of the metal base material 1, and forms a molten pool 4 on the metal base material 1. At the same time, the high-speed air flow 2 is used to break the melt into small droplets and then solidify into metal powder5. By adjusting the heat input control parameters of the laser beam 3 and / or the preheating temperature of the metal base material 1 to control the size of the molten pool 4 on the metal base material 1; by coupling the size of the molten pool 4, the surface temperature of the molten pool 4, and the high-speed air flow 2 flow rate to control the particle size distribution of the metal powder 5; the heat input control parameters include laser power a...

Embodiment 2

[0037] This embodiment provides a metal material atomization powder making method based on laser melting, and the specific steps are as follows:

[0038] Step 1, select the plate-shaped CMSX-4 alloy as the metal base material, with a thickness of 5cm and a melting point of about 1400°C. Firstly, the metal base material is preheated by resistance heating. wood as raw material;

[0039] In step 2, the laser beam is used as the heat source, and the radiation transfers heat to the surface of the metal base material to form a molten pool on the metal base material. At the same time, the high-speed air flow is used to break the melt into small droplets and then solidify into metal powder. Wherein, the relative motion relationship between the laser beam and the base metal is as follows: the base metal is fixed, and the laser beam moves relative to the base metal. The control parameters during the specific operation are as follows:

[0040] Laser diameter: d=2mm

[0041] Laser powe...

Embodiment 3

[0048] This embodiment provides a metal material atomization powder making method based on laser melting, and the specific steps are as follows:

[0049] Step 1. Select the plate-shaped HR2 alloy as the base metal, with a thickness of 5 cm and a melting point of about 1400°C. Firstly, the base metal is preheated by resistance heating, and the base metal with a preheating temperature of T1=25°C is used as the base metal. raw materials;

[0050] In step 2, the laser beam is used as the heat source, and the radiation transfers heat to the surface of the metal base material to form a molten pool on the metal base material. At the same time, the high-speed air flow is used to break the melt into small droplets and then solidify into metal powder. Wherein, the relative motion relationship between the laser beam and the base metal is as follows: the base metal is fixed, and the laser beam moves relative to the base metal. The control parameters during the specific operation are as f...

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Abstract

The invention discloses a metal material atomization powder preparation method based on laser melting. The method comprises the following steps: (1) firstly, metal base materials are preheated; and (2) laser beams, as heat sources, are radiated to the surfaces of the metal base materials to transmit heat; molten pools are formed in the metal base materials; and meanwhile, high-speed air currents are used for crushing melts as small liquid drops to solidify as metal powder. The laser beams are used as the heat sources; the laser power and the laser scanning speed are used as control parametersof heat inputting; through laser radiation, the heat is quickly transmitted to the surfaces of the metal base materials to form the molten pools; the sizes of the molten pools are precisely controlledthrough controlling the control parameters of heat inputting and the preheating temperature of the metal base materials; the high-speed air currents are used for crushing the melts as the small liquid drops to solidify as the metal powder; and under coupling control of the sizes of the molten pools, the surface temperatures of the molten pools and the high-speed currents, the particle size control of atomized powder is realized.

Description

technical field [0001] The invention relates to the technical field of metal material crushing operations, in particular to a laser melting-based atomization powder making method for metal materials. Background technique [0002] The preparation methods of metal powder can be divided into two categories: mechanical method and physical chemical method. Mechanical powder preparation is a process in which raw materials are mechanically pulverized while the chemical composition is basically unchanged. Physicochemical law is the process of obtaining powder by changing the chemical composition or aggregation state of raw materials by chemical or physical action. [0003] The atomization method is one of the commonly used powder preparation methods. It directly breaks the molten metal or alloy into fine droplets, the size of which is generally less than 150 μm, and then solidifies into powder. The atomization method can be used to prepare a variety of metal powders, as well as va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0848
Inventor 王国伟党永坤程志瑶李建明沈显峰陈金明
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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