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A laser melting and surface treatment technology, which is applied in the direction of additive manufacturing and additive processing, can solve the problems of low precision and large surface roughness
Active Publication Date: 2021-07-30
HARBIN INST OF TECH
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Problems solved by technology
[0004] The present invention aims to solve the technical problems of large surface roughness and low precision of existing selective laser melting AlSi10M
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specific Embodiment approach 1
[0031] Embodiment 1: This embodiment is an electrochemical surface treatment method for selective laser melting of AlSi10Mg alloy heat-treated products, characterized in that the method is specifically carried out according to the following steps:
[0032] 1. Use NaOH, EDTA and deionized water to prepare the electrolyte, and control the amount of NaOH to be 60-70g / L and the amount of EDTA to be 15-20g / L;
[0033] 2. Grinding the AlSi10Mg alloy, then pickling with pickling solution, rinse with running water immediately after pickling, and dry;
[0034] 3. The AlSi10Mg alloy treated in step 2 is electrochemically polished using a three-electrode system, the platinum sheet is the cathode, the AlSi10Mg alloy is the anode, the Ag / AgCl electrode is the reference electrode, and the electrolyte is prepared in step 1; rinse with running water immediately after polishing;
[0035] Fourth, ultrasonically clean the AlSi10Mg alloy processed in step 3 to complete the electrochemical surface...
specific Embodiment approach 2
[0036] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the amount of NaOH is controlled to be 60 g / L, and the amount of EDTA is 16.7 g / L. Others are the same as the first embodiment.
specific Embodiment approach 3
[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: the mass percentage of elements in the AlSi10Mg alloy described in step 2 is: Si: 10-11%, Mg: 0.2-0.3%, Fe: < 0.05%, Cu: ≤ 0.01%, Ni: ≤ 0.01%, Zn: ≤ 0.01%, Ti: ≤ 0.02% and the balance is aluminum. Others are the same as in the first or second embodiment.
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Abstract
The invention discloses an electrochemical surface treatment method for a selective laser melting AlSi10Mg alloy heat treatment product, and relates to the field of electrochemical surface finishing of metal materials. The technical problems that an existing selective laser melting AlSi10Mg alloy heat treatment product is large in surface roughness and low in precision are solved. The electrochemical surface treatment method comprises the following steps that an electrolyte is prepared from NaOH and EDTA; the AlSi10Mg alloy is subjected to polishing and acid pickling; and electrochemical polishing is carried out by adopting a three-electrode system. According to the electrochemical surface treatment method for the selective laser melting AlSi10Mg alloy heat treatment product, the roughness of the selective laser melting AlSi10Mg alloy heat treatment product is reduced from 12+/-2[mu]m to 3+/-2[mu]m through an electrochemical surface treatment technology, and an AlSi10Mg alloy heat treatment sample which is smooth in surface and shows metallic luster is obtained. The electrochemical surface treatment method is used for surface treatment of the AlSi10Mg alloy heat treatment product.
Description
technical field [0001] The invention relates to the field of electrochemical surface finishing of metal materials. Background technique [0002] Metal material additive manufacturing technology, also known as 3D printing technology, laser rapid prototyping technology, 3D printing technology is an emerging and rapidly developing rapid prototyping manufacturing technology, which is widely used in the manufacture of modern models in the fields of military industry, aerospace, biomedicine, etc. The outstanding advantages of molds and parts, etc. are that no or less machining or molds are required, and parts with complex structures and shapes can be directly generated from computer graphics data, which significantly shortens the product development cycle and improves the utilization and production efficiency of raw materials. reduce manufacturing cost. [0003] As a new aluminum alloy forming technology, selective laser melting technology is not only suitable for preparing vario...
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