Electron beam-friction-stir composite additive manufacturing method

A friction stir and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problem that electron beam-friction stir composite additive manufacturing technology has no relevant reports, and achieve the goal of eliminating internal defects, improving organizational properties, and improving workpiece organization. Effect

Inactive Publication Date: 2018-03-20
HARBIN INST OF TECH AT WEIHAI
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Problems solved by technology

[0004] Electron beam-friction stir composite additiv

Method used

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  • Electron beam-friction-stir composite additive manufacturing method
  • Electron beam-friction-stir composite additive manufacturing method

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Embodiment 1

[0027] Embodiment 1: This embodiment is realized through the following steps:

[0028] Step 1: Design the 3D model of the workpiece;

[0029] Step 2: Process the 3D model of the workpiece with slicing software and save it as an STL file;

[0030] Step 3: Start the electron beam additive manufacturing device to process the current slice;

[0031] Step 4: After the processing is completed, the stirring head performs friction stir processing on the slice;

[0032] Step 5: After the processing is completed, the workbench is lowered by one slice thickness;

[0033] Step 6: Repeat steps 3 to 4 for additive manufacturing.

[0034] Among them, the material used in additive manufacturing is 7075 aluminum alloy powder with a particle size of 0.5 μm to 15 μm.

[0035] Among them, the diameter of the spot in the electron beam additive manufacturing process is 0.001 mm to 25 mm.

[0036] Wherein, the line speed of electron beam additive manufacturing is 30mm / min-150mm / min.

[0037] W...

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Abstract

The invention provides an electron beam-friction-stir composite additive manufacturing method and belongs to the technical field of manufacturing of an additional material. The electron beam-friction-stir composite additive manufacturing method comprises the following technologic steps: manufacturing a layer of an electron beam additive material, and subsequently processing and modifying the layerof material by using a region-selected friction-stir processing method so as to obtain excellent tissues. In the additive manufacturing process, each layer is subjected to electron beam sintering andfriction-stir processing repeatedly so as to obtain a complicated work piece which is small in grain structure, excellent in mechanical property and less in internal defects. The electron beam-friction-stir composite additive manufacturing method provided by the invention can solve the problems that a conventional additive material manufactured work piece has solidified cracks and is uneven in tissues and poor in physical property; meanwhile, an additive manufacturing material can form nanometer crystals after the electron beam sintered additive manufactured layer is subjected to the friction-stir process, so the tissues of the work piece are improved, and the physical property of the work piece is improved. Besides, by region-selected friction-stir, internal defects formed in a sinteringprocess can be eliminated, second-phase dispersive distribution of the material is realized, and the tissue performances of the work piece are improved.

Description

technical field [0001] The invention relates to an additive manufacturing method, in particular to an electron beam-friction-stir composite additive manufacturing method, which belongs to the technical field of additive manufacturing. Background technique [0002] The selective sintering additive manufacturing technology is an advanced manufacturing technology that has developed rapidly in recent years. The 3D printing technology represented by it is called "the processing technology with industrial revolution significance". However, since the processing process is actually selected area micro-casting, the processed workpiece has problems such as large internal stress, micro-cracks, porosity, second phase segregation, and material spheroidization. These problems not only greatly deteriorate the microstructure and properties of the workpiece produced by selective sintering, but also seriously limit the application of this technology in actual production. [0003] Friction st...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y10/00B33Y40/00
CPCB33Y10/00B33Y40/00B22F10/00B22F10/36B22F12/53B22F10/66B22F10/25B22F10/28B22F10/38B22F10/50Y02P10/25
Inventor 周利于明润蒋智华杨海峰黄永宪冯吉才
Owner HARBIN INST OF TECH AT WEIHAI
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