Research on Superaudio MIG Assisted Triple Wire Arc Additive Manufacturing Process

ZHANG Jiaheng; HUANG Yi; GUO Shun; YANG Dongqing; YAN Dejun; LI Dong; WANG Kehong

doi:10.7512/j.issn.1001-2303.2023.02.10

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Research on Superaudio MIG Assisted Triple Wire Arc Additive Manufacturing Process
Vol. 53, Issue 2, Pages: 104-110(2023)
DOI： 10.7512/j.issn.1001-2303.2023.02.10

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张加恒，黄祎，郭顺，等.超音频MIG辅助三丝电弧增材制造工艺研究［J］.电焊机，2023，53（2）：104-110.

ZHANG Jiaheng, HUANG Yi, GUO Shun, et al.Research on Superaudio MIG Assisted Triple Wire Arc Additive Manufacturing Process[J].Electric Welding Machine, 2023, 53(2): 104-110.
张加恒，黄祎，郭顺，等.超音频MIG辅助三丝电弧增材制造工艺研究［J］.电焊机，2023，53（2）：104-110. DOI： 10.7512/j.issn.1001-2303.2023.02.10.

ZHANG Jiaheng, HUANG Yi, GUO Shun, et al.Research on Superaudio MIG Assisted Triple Wire Arc Additive Manufacturing Process[J].Electric Welding Machine, 2023, 53(2): 104-110. DOI： 10.7512/j.issn.1001-2303.2023.02.10.

摘要

多丝多弧的增材技术具有更高的成形效率，但是较大的热输入会影响形貌和性能，因而引入超音频电弧以达到细化晶粒并提高熔深的目的。以316L不锈钢作为试验材料，采用MIG焊工艺，自主搭建超音频三丝电弧增材制造平台，基于单丝单道模型，进行了三丝单道单层以及三丝单道多层增材工艺试验研究。结果表明，30 kHz超音频电弧可显著细化熔敷道组织并破坏树枝状结构，横向和水平平均抗拉强度分别提高了81 MPa和23 MPa，水平平均断裂延伸率从18.5%提升到39.3%，且整体提高试件的显微硬度。但若频率过高，超声波带来的能量会过高，从而减缓冷却速度，导致晶粒粗化。

Abstract

Multi-wire and multi-arc additive technology has higher molding efficiency. But large heat input will affect the morphology and performance, so the superaudio arc is introduced to refine the grain and improve the penetration depth. In this paper, 316L stainless steel was used as the test material and MIG welding process was adopted to independently build the superaudio triple-wire arc additive manufacturing platform. Based on the single-wire single-channel model, the experiments of triple-wire single-channel single-layer and triple-wire single-channel multi-layer additive process were conducted. The results show that 30 kHz superaudio arc can significantly refine the microstructure of the weld and destroy the dendritic structure, increase the average transverse and horizontal tensile strength by 81 MPa and 23 MPa respectively, increase the average horizontal fracture elongation from 18.5% to 39.3%, and improve the microhardness of the test piece as a whole. But if the frequency is too high, the energy brought by the ultrasonic wave will be too high to slow down the cooling rate, resulting in grain coarsening.

关键词

电弧增材制造超音频多丝多弧微观组织力学性能

Keywords

wire arc additive manufacturingsuperaudiomulti-wire and multi-arcmicrostructuremechanical properties

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