工艺参数对2A12T4铝合金挤压棒材晶间腐蚀及力学性能的影响  

The influence of process parameters on intergranular corrosion and mechanical properties of 2A12T4 aluminum alloy extruded bars

作　　者：贺文秀[1] 臧旭 满正良 刘兵[1] 聂长发 王青 张欣蕊 王晨阳 HE Wenxiu;ZANG Xu;MAN Zhengliang;LIU Bing;NIE Changfa;WANG Qing;ZHANG Xinrui;WANG Chenyang(Northeast Light Alloy Co.,Ltd.,Harbin 150060,China;The First Military Representative Office of the Air Force Equipment Department Stationed in Shenyang,Shenyang 110000,China;College of Materials Science and Engineering,Jiamusi University,Jiamusi 154007,China)

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060 [2]空军装备部驻沈阳地区第一代表室,辽宁沈阳110000 [3]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007

出　　处：《轻合金加工技术》2024年第8期16-21,共6页Light Alloy Fabrication Technology

摘　　要：采用正交试验研究化学成分、挤压工艺、热处理工艺对2A12T4铝合金挤压棒材晶间腐蚀及力学性能的影响。结果表明,挤压温度是影响2A12T4铝合金挤压棒材力学性能的主要因素,挤压温度越高,棒材的抗拉强度及屈服强度越高,伸长率越低。淬火转移时间是影响棒材晶间腐蚀的主要因素,淬火转移时间越短,晶间腐蚀深度越小,当转移时间为10 s时,只发生轻微点蚀,棒材满足用户及标准要求。The influence of chemical composition, extrusion process, and heat treatment process on the intergranular corrosion and mechanical properties of 2A12T4 aluminum alloy extruded bars was studied with orthogonal tests. The results show that extrusion temperature is the main factor affecting the mechanical properties of 2A12T4 aluminum alloy bars. The higher the extrusion temperature, the higher the tensile strength and yield strength of the bars, and the lower the elongation. Quenching transfer time is the main factor affecting intergranular corrosion of bars. The shorter the quenching transfer time, the less deeper the intergranular corrosion. When the transfer time is 10 seconds, only slight pitting corrosion occurs, and the bar meets the user′s and standard requirements.

关 键 词：2A12T4铝合金 挤压 热处理 晶间腐蚀 力学性能 正交试验 

分 类 号：TG146.21[一般工业技术—材料科学与工程]