汽车用结构件7108挤压铝合金预时效制度研究

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中图分类号：U465.2+2 文献标志码：B DOI：10.19710/J.cnki.1003-8817.20240413

Study on Pre-Aging System of 71o8 Extruded Aluminum Alloy for Automotive Structural Parts

YangMing，LiChunliu，Zhu Xiao，Pan Yan，Jiang Xinwei （Liaoning Zhongwang Group，Liaoyang111000）

Abstract：To stabilize mechanical property of automotivestructural components made of 7-series extruded aluminum aloy，and enhance the finished product rate for subsequent deep procesing，this study uses the 7108 extruded aluminum alloyprofileofthestructuralpartfornew energyvehiclesas thetestmaterial，conducts three stages of processing，including natural aging，pre-aging and pre-aging + artificial aging，and confirms the influence of the optimal pre-aging system and pre-aging of 7108 extruded aluminum allyprofileof automotive structural part on the mechanical propertiesand intergranular corosion resistance of subsequent artificial aging.Theresults indicate that pre-agingcan efectivelycontrolthe increasein mechanical propertiesof71O8aluminum alloyprofilesundernatural conditions，thereby improving the machinability of the product.

Key words：71o8 aluminum alloy，Pre-aging method，Mechanical properties，Intergranular corrosion

1前言

随着环境及能源问题日益突出，节能减排是未来汽车行业的发展方向，铝代替钢可有效减轻汽车质量，达到节约能源的目的，因此，汽车用结构件采用铝合金已得到国内外汽车主机厂的广泛认可[1-3]。（剩余4336字）