电子束扫描波形对紫铜显微组织及力学性能的影响

张子阳; 王善林; 柯黎明; 左瑶

doi:10.15980/j.tzzz.2017.12.024

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电子束扫描波形对紫铜显微组织及力学性能的影响
Effects of Scanning Mode on Microstructure and Mechanical Properties of Copper Joint Fabricated by Electron Beam Welding
2017年37卷第12期页码：1361-1365
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.12.024

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[1]张子阳,王善林,柯黎明,左瑶.电子束扫描波形对紫铜显微组织及力学性能的影响[J].特种铸造及有色合金,2017,37(12):1361-1365.

Zhang Ziyang, Wang Shanlin, Ke Liming, et al. Effects of Scanning Mode on Microstructure and Mechanical Properties of Copper Joint Fabricated by Electron Beam Welding[J]. Special Casting & Nonferrous Alloys, 2017,37(12):1361-1365.
[1]张子阳,王善林,柯黎明,左瑶.电子束扫描波形对紫铜显微组织及力学性能的影响[J].特种铸造及有色合金,2017,37(12):1361-1365. DOI： 10.15980/j.tzzz.2017.12.024.

Zhang Ziyang, Wang Shanlin, Ke Liming, et al. Effects of Scanning Mode on Microstructure and Mechanical Properties of Copper Joint Fabricated by Electron Beam Welding[J]. Special Casting & Nonferrous Alloys, 2017,37(12):1361-1365. DOI： 10.15980/j.tzzz.2017.12.024.

摘要

对厚2mm的T2紫铜薄板进行真空电子束焊接

研究了不同扫描方式对焊缝表面成形、焊接接头微观组织和力学性能的影响。结果表明

在工作距离为300mm、加速电压为60kV、聚焦电流为502mA、焊接速度为800mm/min和电子束流为27mA情况下

对比添加了扫描方式的焊接

发现焊接过程中加入三角波扫描时

不但可以得到成形良好的焊接接头

而且焊缝的显微硬度值和焊接接头的抗拉强度均得到了改善。焊接接头的平均抗拉强度为178.8 MPa

其中最高抗拉强度为母材的85%

伸长率最高可达母材的84.5%

焊缝熔合区较整个焊缝区来说最为薄弱。

Abstract

Effects of scanning modes on welding surface forming

microstructure and mechanical properties of vacuum electron beam welding T2 copper sheet with 2 mm thick were investigated.The results reveal that at the fixed parameters

such as scanning distance of 300 mm

accelerating voltage of 60 kV

focusing current of 502 mA

welding speed of 800 mm/min and electron beam of 27 mA

the welding effects of welding joint with different scanning modes were analyzed comparatively.The results show that with adding triangle wave scanning

welded joints have the desirable forming quality

and hardness and tensile strength of the welding joint are improved

where the average tensile strength of welded joint reaches 178.8 MPa

and the maximum tensile strength can reach 85% of the base metal

meanwhile the elongation rate is 84.5% of the base metal.However

the strength and hardness of the welded fusion zone is the lowest.