锻压技术

上层板厚度对HC340/590DP-AlSi10MnMg自冲铆接接头力学性能的影响

英文标题：Influence of upper plate thickness on mechanical properties for HC340/ 590DP-AlSi10 MnMg self-piercing riveted joint

作者：覃清钰1 韦超忠1 张发晖1 廖祖煜2

单位：1.上汽通用五菱汽车股份有限公司广西新能源汽车实验室 2. 湖南湖大艾盛汽车技术开发有限公司柳州分公司

关键词：上层板厚度自冲铆接压铸铝合金热处理失效载荷能量吸收

分类号：TG306

出版年,卷(期):页码：2023,48(12):100-104

摘要：

为了探究上层板厚度对HC340/590DP高强钢和AlSi10MnMg压铸铝合金自冲铆接接头力学性能的影响，通过热处理提高了AlSi10MnMg压铸铝合金的伸长率，随后将其与不同厚度的HC340/590DP高强钢铆接，并测试接头的力学性能。实验结果表明，采用T7热处理工艺时，AlSi10MnMg压铸铝合金具有最优的铆接成形性能，其伸长率达到19%，相比铸态伸长率（11%）提升了72%。铆接过程中，铆钉刺穿上层板的压力随上层板厚度的增大而增大。当上层板厚度为0.8~2.0 mm时，SPR接头的失效载荷随上层板厚度先增大后减小，并且具有函数关系：y=e-1.02x2+ 3.41x-0.57。当上层板厚度为1.6 mm时，SPR接头具有最大失效载荷（9.8 kN）和最大能量吸收值（31.7 kJ）

In order to investigate the influence of upper plate thickness on the mechanical properties of self-piercing riveting （SPR）between HC340/590DP high-strength steel and AlSi10MnMg die-cast aluminum alloy, the elongation of AlSi10MnMg die-cast aluminum alloy was improved by heat treatment, and then riveted with HC340/590DP high-strength steel of different thicknesses,and the mechanical properties of joints were tested. The experimental results show that when using the T7 heat treatment process, AlSi10MnMg die-cast aluminum alloy has optimal riveting formability, with an elongation of 19%, which is 72% higher than the as cast elongation (11%). During the riveting process, the pressure of the rivet piercing the upper plate increases with the increasing of upper plate thickness. When the thickness of upper plate is 0.8-2.0 mm, the failure load of SPR joint first increases and then decreases with the increasing of upper plate thickness, and has the functional relationship: y=e-1.02x2+ 3.41x-0.57. When the thickness of upper plate is 1.6 mm, the SPR joint has the maximum failure load (9.8 kN) and the maximum energy absorption value (31.7 kJ).

基金项目：

广西科技重大专项（2023AA04004，2023AA04007）；柳州市科技计划项目（2020GAAD0601）

作者简介：覃清钰（1994-），男，博士，工程师 E-mail：qyqin17s@163.com 通信作者：韦超忠（1979-），男，学士，高级工程师 E-mail：Chaozhong.Wei@sgmw.com.cn

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