Preparation method of copper alloy additive based on electron beam powder forming
An electron beam, copper alloy technology, applied in the field of additive manufacturing, can solve the problems of large arc heat source action area, poorly controllable heat flow distribution, large operating speed limit, etc., to avoid overheating or spheroidization, reduce residual stress, The effect of high energy utilization
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Embodiment 1)
[0032] What the present embodiment prepares is Cu-10Al-4Fe copper alloy cube, and the preparation method based on electron beam powder spreading comprises the following steps:
[0033] ①Use CAD to establish a three-dimensional solid model of Cu-10Al-4Fe alloy cube, and then use layered software to divide the three-dimensional solid model into thin slices with a thickness of 0.75mm to obtain STL format files, and then import the obtained STL format files into electron beam rapid prototyping machine rapid prototyping software.
[0034] ② Turn on the power, reset all data to zero, and check whether there is enough Cu-10Al-4Fe alloy powder in the powder box. Adjust the forming platform and fill it with craft powder. The forming platform is 30-35mm away from the bottom of the scraper, which is about the thickness of the substrate.
[0035] ③Put the cleaned base plate in the center of the process powder on the forming platform, and fit it with the thermocouple; adjust the base pla...
Embodiment 2)
[0043] The rest of the preparation method based on electron beam powder spreading and forming of the present embodiment are the same as in Example 1, except that:
[0044]In step ①, use CAD to establish a three-dimensional solid model of Cu-10Al-4Fe alloy cube, and then use layered software to divide the three-dimensional solid model into slices with a thickness of 0.50 mm to obtain STL format files.
[0045] Step ⑦ When melting the cross section, the beam current value of the electron beam linearly scans the cross section from 5.5mA (330kW) to 7mA (420kW) incrementally over time, and the increment speed is 0.2mA / s.
Embodiment 3)
[0047] The rest of the preparation method based on electron beam powder spreading and forming of the present embodiment are the same as in Example 1, except that:
[0048] In step ①, use CAD to establish a three-dimensional solid model of Cu-10Al-4Fe alloy cube, and then use layered software to divide the three-dimensional solid model into slices with a thickness of 0.60mm to obtain STL format files.
[0049] Step ⑦ When melting the cross-section, the beam current value of the electron beam linearly scans the cross-section from 5.5mA (330kW) to 7mA (420kW) with time, and the increment speed is 0.3mA / s.
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