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A method and system for additive manufacturing of stainless steel structural parts based on low-power laser-induced tig arc

An additive manufacturing and laser-induced technology, which is applied in manufacturing tools, laser welding equipment, metal processing equipment, etc., can solve the problems of low mechanical properties, improve mechanical properties, reduce anisotropic grain growth, and avoid heat accumulation. Effect

Active Publication Date: 2021-10-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TomasSKIBA and others, Microstructure and Mechanical Properties of Stainless Steel Component Manufactured by Shaped Metal Deposition. Research on 308 stainless steel TIG additive manufacturing, the tensile strength of the formed part is only 537MP, and its mechanical properties are still low

Method used

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  • A method and system for additive manufacturing of stainless steel structural parts based on low-power laser-induced tig arc
  • A method and system for additive manufacturing of stainless steel structural parts based on low-power laser-induced tig arc
  • A method and system for additive manufacturing of stainless steel structural parts based on low-power laser-induced tig arc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The following is an example of using 316 stainless steel to add material to the wall. The specific method is as follows:

[0065] For stainless steel additive manufacturing, because of its strong fluidity and poor metal thermal conductivity, the surfacing welding is unstable, and it is easy to cause problems such as laying down and irregular side forming. At this time, it is necessary to increase the amount of cutting, which will increase the material The amount of processing, there is unnecessary waste. Therefore, the introduction of low-power laser-induced arc is considered for the manufacture of stainless steel walls.

[0066] The manufacturing system selects Riton LWS-1000 with the maximum output power of 1000W as the low-power laser emission device, OTC ACCUTIG-500P welding machine and WF-007 multi-functional automatic argon arc wire filling machine (wire feeding device). The linkage gantry type welding tool clamps and fixes the laser output head, TIG welding torc...

Embodiment 2

[0075] Taking the accumulation of 304 stainless steel low-power laser-induced TIG arc composite additive manufacturing wall as an example, the low-power laser and TIG arc composite additive manufacturing system consists of welding gantry tooling, a laser with a maximum power of 1000W, a TIG welding machine and a wire feeding device. constitute.

[0076] Specific implementation method:

[0077] Use SolidWorks software to make a 3D model, and then import it into EasyPrint 3D software for path planning, slice the model, and generate a processing path.

[0078] The substrate is made of Q235 plate of 300mm×300mm×25mm, the surface of the substrate is polished and milled, cleaned with absolute ethanol and fixed on a horizontal workbench, and the substrate is preheated at 160°C.

[0079] The welding wire type is ASTM304 stainless steel, the diameter is 1.2mm, the shielding gas is ordinary argon gas, and the shielding gas flow rate is 30L / min.

[0080] Adjust the welding current of t...

Embodiment 3

[0085] Taking the accumulation of 308 stainless steel low-power laser-induced TIG arc composite additive manufacturing wall as an example, the low-power laser and TIG arc composite additive manufacturing system consists of Riton LWS-1000 laser, OTC-TIG welding machine and wire feeding device and OTC Welding robot pose.

[0086] Specific implementation method:

[0087] Use 3dsmax software to make a 3D model, and then import it into RepetierHost software for path planning, slice the model, and generate a processing path.

[0088] The substrate is made of 200mm×200mm×10mm Q235 plate, the surface of the substrate is ground and milled, cleaned with absolute ethanol and fixed on a horizontal workbench, and the substrate is preheated at 80°C.

[0089] The welding wire is ER308L stainless steel with a diameter of 0.8mm.

[0090] The welding current is 100A, the welding speed is 200mm / min, the wire feeding speed is 800mm / min, the laser power is 100W, and the shielding gas flow rate i...

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Abstract

The invention provides a method and manufacturing system for additive manufacturing of stainless steel structural parts based on low-power laser-induced TIG arc. Angle relationship, the stainless steel welding wire is fed into the molten pool through an additional wire feeding device, it is stably melted and spread on the processed substrate, and the surfacing is carried out according to the planned route, and the stainless steel workpiece with the required structure is formed layer by layer. The invention effectively improves the arc additive manufacturing process through the addition of low-power laser, increases the arc stability, reduces the irregular flow of the molten pool, effectively improves the side wall roughness of the additive wall, improves the forming quality, and reduces the residual machining The amount increases the utilization rate of materials. The invention has the characteristics of high efficiency and energy saving, and has the characteristics of outstanding speed, high precision, short cycle and low cost in manufacturing complex large-scale components.

Description

technical field [0001] The invention belongs to the technical field of metal additive manufacturing, and relates to an additive manufacturing method, in particular to a low-power laser-induced TIG arc-based additive manufacturing method and manufacturing system for stainless steel structural parts. Background technique [0002] Stainless steel has good formability, simple preparation, wide sources, low cost, good mechanical properties, high structural strength, good corrosion resistance and atmospheric corrosion resistance. For example: 316 austenitic stainless steel can be used in the manufacture of ship hull parts, aircraft parts and nuclear capacitor steel pipes due to its good elongation; 304 stainless steel is resistant to high temperature, has good processing performance and high toughness, and is widely used in industry, furniture decoration industry and Food and medical industry; 309 stainless steel has good corrosion resistance and high temperature resistance, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/348B23K26/342B23K26/70
Inventor 刘黎明张兆栋宋刚王红阳李旭文张炼
Owner DALIAN UNIV OF TECH
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