Research on Arc Additive Repair Process and Microstructure and Properties of Al-Mg-Sc-Zr High Strength Aluminum Alloy

MA Juncheng; REN Xin; ZHU Hongbin; SHE Jie; LI Minggao; ZHANG Lijiao; GUO Xuhang

doi:10.7512/j.issn.1001-2303.2024.09.10

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Research on Arc Additive Repair Process and Microstructure and Properties of Al-Mg-Sc-Zr High Strength Aluminum Alloy
Vol. 54, Issue 9, Pages: 77-84(2024)
Published： 25 September 2024 ，
DOI： 10.7512/j.issn.1001-2303.2024.09.10
稿件说明：

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马俊成，任欣，祝弘滨，等.Al-Mg-Sc-Zr高强铝合金电弧增材修复工艺及组织性能研究［J］.电焊机，2024，54（9）：77-84.

MA Juncheng, REN Xin, ZHU Hongbin, et al.Research on Arc Additive Repair Process and Microstructure andProperties of Al-Mg-Sc-Zr High Strength Aluminum Alloy[J].Electric Welding Machine, 2024, 54(9): 77-84.
马俊成，任欣，祝弘滨，等.Al-Mg-Sc-Zr高强铝合金电弧增材修复工艺及组织性能研究［J］.电焊机，2024，54（9）：77-84. DOI： 10.7512/j.issn.1001-2303.2024.09.10.

MA Juncheng, REN Xin, ZHU Hongbin, et al.Research on Arc Additive Repair Process and Microstructure andProperties of Al-Mg-Sc-Zr High Strength Aluminum Alloy[J].Electric Welding Machine, 2024, 54(9): 77-84. DOI： 10.7512/j.issn.1001-2303.2024.09.10.

摘要

针对Al-Mg-Sc-Zr高强铝合金焊丝，分别采用脉冲CMT（CMT-P）、脉冲MIG（MIG-P）与变极性TIG（TIG-V）对轨道交通常用5083铝合金材料进行修复，对比研究不同电弧增材工艺修复样件的微观组织及力学性能。结果表明：Al-Mg-Sc-Zr高强铝合金焊丝在三种电弧增材修复工艺下均能形成细小的等轴晶组织，且焊缝区分布着大量Al

（Sc，Zr）粒子，这些粒子能够有效细化晶粒尺寸并提高力学性能。修复样件抗拉强度均可达母材强度的90%以上，其中，CMT-P热输入最小，基体强度受热输入影响损失最小，仅1.3%，修复的5083铝合金抗拉强度为293 MPa，达到母材强度的94%；TIG-V及MIG-P热输入相对较大，修复后抗拉强度分别为283 MPa、290 MPa，但基材强度受热影响损失较大，分别为16%、8.7%。

Abstract

The text discusses the reparation of commonly used 5083 aluminum alloy materials for railway transportation using Al-Mg-Sc-Zr high-strength aluminum alloy welding wires. The study compares the microstructure and mechanical properties of different process-repaired samples using pulse CMT (CMT-P) and pulse MIG (MIG-P) melting pole arc welding

as well as non-melting pole arc welding with variable polarity TIG (TIG-V).

Results

show that the repaired areas formed by different arc repairprocesses using Al-Mg-Sc-Zr high-strength aluminum alloys are distributed with a large number of Al

(Sc

Zr) particles

which significantly refine the grain structure of the repaired area. In addition

all repaired specimens have tensile strengths above 90% of the base materials. Among them

CMT-P has the smallest heat input

causing minimal loss to matrix strength due to thermal cycling

at only 1.3%. The repaired 5083 aluminum alloy using this method gets a tensile strength as high as 293 MPa

which reaches 94% of the base material's strength; TIG-V and MIG-P have relatively larger heat inputs and achieve 283 MPa and 290 MPa tensile strengths after being repaired respectively. However

both methods result in greater losses to matrix strength due to thermal cycling

about 16% and 8.7% respectively.

关键词

Al-Mg-Sc-Zr高强铝合金电弧增材修复工艺显微组织力学性能

Keywords

Al-Mg-Sc-Zr high strength aluminum alloyarc additive repair processmicrostructuremechanical properties

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