Preparation method of Hastelloy X alloy powder for 3D printing

An alloy powder and 3D printing technology, applied in the field of additive manufacturing, can solve the problems that restrict the development of 3D printing technology and less research, and achieve the effects of avoiding adverse effects, high purity and high precision

Inactive Publication Date: 2017-07-18
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0006] At present, the research on 3D printing technology at home and abroad is concentrated on the forming process, but there are few studies on the characteristic analysis and preparation process of metal powders for 3D printing, especially Hastelloy X alloy powder, which is the most widely used in the aerospace field. Basically rely on foreign imports, and there is no domestic enterprise capable of large-scale production of Hastelloy X alloy powder for 3D printing. The material problem has become one of the problems restricting the development of 3D printing technology in my country.

Method used

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  • Preparation method of Hastelloy X alloy powder for 3D printing
  • Preparation method of Hastelloy X alloy powder for 3D printing
  • Preparation method of Hastelloy X alloy powder for 3D printing

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preparation example Construction

[0028] A preparation method of Hastelloy X alloy powder for 3D printing technology, comprising the following steps:

[0029] (1) Bar processing: according to the composition of Hastelloy X, Fe: 17% to 20%, Cr: 20.5% to 23%, Co: 0.5% to 2.5%, Mo: 8% to 10%, W: 0.2% to 1%, C: 0.05% ~ 0.15%, Si≤1%, Mn≤1%, P≤0.04%, S≤0.03%, melting to produce Hastelloy X alloy rods, and then processing the rods, according to the intermediate frequency induction The size of the coil determines the processing diameter of the Hastelloy X alloy bar. It is made into a bar with a diameter of 35-50mm, a length of 500-550mm, a V-shaped notch at one end, and a cone angle of 50°-80° at the other end. Hastelloy X alloy bar The structure after processing is as figure 1 shown;

[0030] (2) Smelting and atomizing: equipment for smelting and atomizing pulverization, such as figure 2 As shown, it includes a feeding mechanism 1 arranged up and down, a melting chamber 6 and an atomizing tower 4. The continuous ...

Embodiment 1

[0037] The preparation method of the Hastelloy X alloy powder that is used for laser selective melting technology (SLM), comprises the following steps:

[0038] (1) Bar processing: Process the Hastelloy X alloy bar to make a bar with a diameter of 35mm, a length of 500mm, a V-shaped notch at one end, and a 50° cone angle at the other end;

[0039] (2) Smelting atomization: the processed bar is fixed at the lower end of the feeding mechanism through the clamping mechanism. The alloy bar is lowered, and its tapered part extends into the induction coil; through the mechanical pump and the Roots pump in turn, the melting chamber and the atomization tower are vacuumed, and when the vacuum reaches 10 -2 ~10 -1 Pa, fill the melting chamber and atomization tower with inert gas until the pressure of the melting chamber reaches 10 5 About Pa; turn on the medium frequency induction power supply, heat the bar, the heating power is 40kW, and the bar will merge into liquid droplets or liq...

Embodiment 2

[0046] The preparation method of the Hastelloy X alloy powder that is used for laser stereoforming technology (LSF), comprises the following steps:

[0047] (1) Bar processing: Process the Hastelloy X alloy bar to make a bar with a diameter of 40mm, a length of 550mm, a V-shaped notch at one end, and a 60° cone angle at the other end;

[0048] (2) Smelting atomization: the processed bar is fixed at the lower end of the feeding mechanism through the clamping mechanism. The alloy bar is lowered, and its tapered part extends into the induction coil; through the mechanical pump and the Roots pump in turn, the melting chamber and the atomization tower are vacuumed, and when the vacuum reaches 10 -2 ~10 -1 Pa, fill the melting chamber and atomization tower with inert gas until the pressure of the melting chamber reaches 10 5 About Pa; Turn on the medium frequency induction power supply to heat the bar with a heating power of 20kW. After the bar is melted, it will merge into liquid...

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Abstract

The invention relates to a preparation method of Hastelloy X alloy powder for the 3D printing technology. The preparation method specifically comprises the steps of the vacuum electrode induction melting gas atomization technology, ultrasonic vibration screening, inert gas shielding airflow grading, vacuum degassing treatment and the like to prepare the Hastelloy X alloy powder suitable for the 3D printing technology. Compared with the prior art, the Hastelloy X alloy powder has the characteristics of low impurity content, low oxygen content, high degree of sphericity and the like, meets the performance requirements to powder material from different 3D printing technologies, and promotes the application development of the 3D printing technology.

Description

technical field [0001] The invention relates to a method for preparing metal powder, in particular to a method for preparing Hastelloy X alloy powder for 3D printing, and belongs to the field of additive manufacturing. Background technique [0002] 3D printing is a rapid prototyping technology based on digital model files, using powder, filamentary metal or polymer as raw materials, using laser or electron beam and other means to construct objects by layer-by-layer accumulation. This technology does not require blanks and molds, which not only simplifies the product design and verification procedures, but also shortens the product development cycle, improves production efficiency, and reduces product costs. 3D printing technology is a new high-tech industry with rapid development in the world, and its application fields are extremely wide, especially in the field of aerospace, which has broad application prospects. As the most cutting-edge and most potential technology in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08C22C19/05C22C30/00B33Y70/00
CPCB22F9/082B22F2009/0844B33Y70/00C22C19/055C22C30/00
Inventor 吴文恒杨启云吴凯琦祁海
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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