A process control method for laser 3D printing of aluminum alloy modified by rare earth with low element burning loss

A rare earth modification and 3D printing technology, applied in the field of aluminum alloy materials, can solve the problems of difficult rapid heat conduction, rare earth element evaporation burning, rare earth element burning, etc., to improve the flow spreading performance, effectively control and reduce, reduce The effect of evaporative burn loss
CN107671289BActive Publication Date: 2019-09-10NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
12 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2019-09-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the field of aluminum alloy materials, and relates to a process control method for laser 3D printing of aluminum alloys modified and enhanced by low-element burning loss, including powder spreading and laser scanning; Defocus scanning is carried out in combination of the three; wherein, the partition differential scanning is to uniformly partition the two-dimensional scanning area to obtain a number of scanning blocks, and the block interval scanning is adopted during the scanning process; the intermittent Scanning means that during the scanning process, the laser beam stops scanning every time it travels a scanning vector distance, cools down for a period of time, and then continues scanning; the defocused scanning is to change the focal plane of the laser beam so that the focal plane is located below the formed substrate. It achieves effective control of the temperature of the molten pool in the laser 3D printing process through process regulation methods, and at the same time solves the problem of burning elements in laser additive manufacturing.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of aluminum alloy materials, and relates to a process control method for laser 3D printing of aluminum alloy modified and enhanced by rare earth with low element burning loss, in particular to a 3D printing process capable of realizing low element burning loss. Background technique

[0002] Due to its high specific strength and plasticity, good thermal and electrical conductivity and corrosion resistance, aluminum alloys are widely used in aerospace, traffic lights, ships and other industrial fields. In order to further improve the strength of aluminum alloy, it is usually achieved by adding trace elements to form fine dispersed precipitates in the matrix. Among them, the addition of rare earth elements is particularly significant. It can not only form fine precipitates, but also effectively improve the metallographic structure of the alloy, refine the grains, remove gases and harmful impurities in the alloy, reduce t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More