首页|挤压速度对双坯料连续挤压6063铝合金焊合性能的影响

挤压速度对双坯料连续挤压6063铝合金焊合性能的影响

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在双坯料连续挤压过程中,由于两根坯料汇合而形成挤压焊缝.通过显微组织观察、拉伸试验、扫描电镜研究挤压轮转速对6063铝合金焊缝显微组织形貌和性能的影响,并通过有限元仿真分析焊合参数.结果表明,在连续挤压过程中,坯料外表面的氧化物对金属焊合有显著影响,随着挤压速度的增加,等效应变速率明显增加,造成焊合面上的氧化物的破碎程度增加.提高挤压速度所引起的高温加速焊合界面形成冶金结合,部分焊合线逐渐消失,焊合界面上未达到冶金结合的焊缝所占比例逐渐降低.随着挤压速度的增加,焊缝试样的抗拉强度和伸长率均增大.
Effects of extrusion speed of continuous extrusion with double billets on welding performance of 6063 Al alloy
During continuous extrusion, the welds were formed at the confluence of two billets. Influences of extrusion wheel rotational speed on micromorphology and properties of welds of 6063 Al alloy were investigated through microstructure observation, tensile test, and SEM analyses. Welding parameters were analyzed using finite element simulation. Results indicated that metal welding was remarkably affected by oxide on outer surface of the double billets during continuous extrusion. Degree of oxide breakage on the welding surface increased due to the evident increase in effective strain rate with increasing extrusion speed. The high temperature induced by increased extrusion speed accelerated the formation of metallurgical bonding. A portion of weld seam lines slowly disappeared, and the proportion of the welding interface that failed to reach metallurgical bonding was also gradually reduced. Tensile strength and elongation of the weld specimen increased with the increase of extrusion speed.

continuous extrusion6063 Al alloyextrusion speedwelding performance

赵颖、裴久杨、郭丽丽、运新兵、马怀超

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大连交通大学 连续挤压教育部工程研究中心,大连 116028

连续挤压 6063铝合金 挤压速度 焊合性能

authors are grateful for the financial supports from the National Natural Science Foundation of Chinaauthors are grateful for the financial supports from the National Natural Science Foundation of ChinaDepartment of Education Fund Item of Liaoning Province,China

5170506251675074JDL 2019021

2021

10.1016/S1003-6326(21)65598-X

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(6)
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