Researched Friction Stir Welding Process of 6063-T5 Aluminum Alloy Radiator Thick Plate

DENG Qinghong

doi:10.7512/j.issn.1001-2303.2024.05.12

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Researched Friction Stir Welding Process of 6063-T5 Aluminum Alloy Radiator Thick Plate
Vol. 54, Issue 5, Pages: 85-91(2024)
Published： 25 May 2024 ，
DOI： 10.7512/j.issn.1001-2303.2024.05.12

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邓清洪.6063-T5铝合金散热器厚板搅拌摩擦焊工艺研究［J］.电焊机，2024，54（5）：85-91.

DENG Qinghong.Researched Friction Stir Welding Process of 6063-T5 Aluminum Alloy Radiator Thick Plate[J].Electric Welding Machine, 2024, 54(5): 85-91.
邓清洪.6063-T5铝合金散热器厚板搅拌摩擦焊工艺研究［J］.电焊机，2024，54（5）：85-91. DOI： 10.7512/j.issn.1001-2303.2024.05.12.

DENG Qinghong.Researched Friction Stir Welding Process of 6063-T5 Aluminum Alloy Radiator Thick Plate[J].Electric Welding Machine, 2024, 54(5): 85-91. DOI： 10.7512/j.issn.1001-2303.2024.05.12.

摘要

为探索大型宽幅翅片散热器铝合金厚板的FSW工艺，采用厚度为20.5 mm的6063-T5铝合金翅片散热器挤压型材作为试验材料，通过静龙门式二维生产型设备进行FSW。焊后利用光学显微镜、显微硬度仪和电子万能拉伸试验机对接头进行了金相分析、显微硬度分析和拉伸、弯曲力学性能测试。试验结果表明，在转速600 r/min，焊接速度140 mm/min的焊接工艺参数下，接头抗拉强度为158.0 MPa，为母材强度的87.7%；焊缝区相比母材有一定程度的硬度降低，接头存在两个明显的硬度软化区，分别是前进侧和后退侧热影响区，最低硬度值约33 HV；接头拉伸断裂方式为韧性断裂，接头弯曲到180°均不发生断裂。证明该FSW工艺可以获得表面成形良好、无宏观缺陷的焊接接头，其显微组织和力学性能测试结果满足工程应用要求。

Abstract

To explore the Friction Stir Welding (FSW) process for large-width fin radiator aluminum alloy thick plates

20.5 mm thick 6063-T5 aluminum alloy fin radiator extrusion profiles were used as test materials and welded using a static gantry-type two-dimensional production equipment. Post-welding

the joints were analyzed and tested using an optical microscope

a microhardness tester

and an electronic universal tensile testing machine for metallographic analysis

microhardness analysis

and tensile and bending mechanical property tests. The experimental results indicate that under the welding process parameters of 600 revolutions per minute (r/min) and a welding speed of 140 millimeters per minute (mm/min)

the tensile strength of the joints was 158.0 MPa

which is 87.7% of the base material's strength. The hardness in the weld zone was somewhat lower compared to the base material

with two distinct hardness softening areas present in the heat-affected zones (HAZ) on both the advancing and retreating sides

with the lowest hardness value being approximately 33 HV. The joints exhibited ductile fracture in tensile testing

and no fractures occurred when the joints were bent to 180°. This demonstrates that the FSW process can achieve well-formed

macroscopic defect-free welded joints

with microstructural and mechanical property results that meet the requirements for engineering applications.

关键词

6063-T5铝合金厚板搅拌摩擦焊焊接缺陷力学性能

Keywords

6063-T5 aluminum alloythick plate friction stir weldingwelding defectmechanical property

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