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Multi-arc synergistic additive manufacturing method applicable to high-performance metal component

A metal component and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems that cannot meet the high performance requirements of large metal components, coarse grains of metal components, performance deterioration, etc., achieve high strength, reduce forming time, and improve forming efficiency effect

Active Publication Date: 2017-09-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the efficiency of arc fuse additive manufacturing is about 3kg / h-5kg / h (steel material), and its forming efficiency is higher than that of laser and electron beam types, but it is still efficient when forming large metal components. low
In addition, further studies have shown that during the accumulation process of arc fuses, heat accumulation tends to make the grains of the accumulated formed metal components coarse, resulting in performance deterioration, which cannot meet the high performance requirements of large metal components

Method used

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  • Multi-arc synergistic additive manufacturing method applicable to high-performance metal component
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  • Multi-arc synergistic additive manufacturing method applicable to high-performance metal component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The tensile strength of a key component of a ship is above 1000MPa, and the forming material has a high content of alloy elements. During the accumulation forming process, if the cooling rate is too fast, it is easy to produce a lamellar martensite structure with low toughness. In order to avoid the generation of lamellar martensite and obtain a high-toughness structure, the method of using 5-beam arc eutectic pool is used as an example to perform additive manufacturing. Specific steps are as follows:

[0044] 1) Adjust the distance between the 5 beams of arcs to ensure that the distance between them is 6mm (within 10mm is the state of the eutectic pool), and the angle between the arc gun body and the Z axis is 39°. At this time, the 5 beams of arcs are common molten pool state;

[0045] 2) Three-dimensional model establishment: use UG three-dimensional modeling software to draw three-dimensional CAD models of parts, and generate robot numerical control codes and formi...

Embodiment 2

[0053] A key component of a large building, the tensile strength of the component is above 500MPa, and the forming material is low-alloy carbon steel. In order to avoid excessive grain growth, the cooling rate from 800°C to 300°C cannot be too slow. Therefore, in order to obtain high-strength and high-toughness metal components, additive manufacturing is carried out in a 5-arc eutectic pool state. Specific steps are as follows:

[0054] 1) Adjust the distance between the 5 beams of arcs to ensure that the distance between them is 20mm (above 18mm is the state of the non-eutectic pool), and the angle between the arc gun body and the Z axis is 9°. At this time, the 5 beams of arcs are Non-eutectic pool state;

[0055] 2) Three-dimensional model establishment: use the three-dimensional modeling software Pro / E to draw the three-dimensional CAD model of the parts, and generate the robot numerical control code and the forming path software;

[0056] 3) Temperature field regulatio...

Embodiment 3

[0062] The key components of a large pressure vessel have a tensile strength above 780MPa, and the forming material is low-alloy carbon steel. It is necessary to avoid excessive growth of grains and to prevent the formation of immediate bodies, and the cooling rate from 800°C to 300°C should be moderate. Therefore, in order to obtain high-strength and high-toughness metal components, a 5-arc partial eutectic pool is used for additive manufacturing. Specific steps are as follows:

[0063] 1) Adjust the distance between the 5 beams of arcs to ensure that the distance between them is 12mm (the part of the eutectic pool is between 10mm and 18mm), and the included angle of the gun body posture is 25°. At this time, the 5 beams of arcs are part eutectic pool state;

[0064] 2) Three-dimensional model establishment: use UG three-dimensional modeling software to draw three-dimensional CAD models of parts, and generate robot numerical control codes and forming path software;

[0065...

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Abstract

The invention belongs to the relevant technical field of additive manufacturing, and particularly relates to a multi-arc synergistic additive manufacturing method applicable to a high-performance metal component. The method comprises the steps that multiple mutually-independent arc guns capable of executing X-Y-Z three-axis translation and angle rotation are arranged for the metal component to be formed, and therefore the relative positions and working states of the arc guns are freely changed; based on a three-dimensional model and a forming path of the metal component, the same or different metal wires are installed on wire feeding systems of the arc guns, and the multi-arc system additive manufacturing process for the metal component is executed by adopting some or combination of multiple modes of a common molten pool, a non-common-molten pool and a partial molten pool according to working condition requirements. By means of the multi-arc synergistic additive manufacturing method, the temperature field of deposited metal can be well adjusted, the metal structure is remarkably improved, the whole arc additive manufacturing process with the higher efficiency and higher quality is achieved, and the multi-arc synergistic additive manufacturing method is particularly applicable to special application occasions of high-performance large complex metal components.

Description

technical field [0001] The invention belongs to the technical field related to additive manufacturing, and more specifically relates to a multi-arc collaborative additive manufacturing method suitable for high-performance metal components. Background technique [0002] The so-called arc melting metal wire additive manufacturing technology is a rapid additive manufacturing method that uses an arc as a heat source to melt metal wire, and makes the melted wire continuously pile up and form according to the set forming path. As a small molten pool melting metallurgical technology, the arc additive manufacturing process has good mechanical properties and uniform chemical composition of the deposited layer metal. Compared with additive manufacturing technologies such as high-energy beams (laser and electron beams), arc additive manufacturing technology has the characteristics of low cost, high efficiency, and the formation of arbitrary curved surfaces in space, so it is suitable f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04
CPCB23K9/044
Inventor 余圣甫史玉升代轶励宋波张李超
Owner HUAZHONG UNIV OF SCI & TECH
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