C_2Cl_6除气剂-超声场联合处理对铝合金氢含量及力学性能的影响  

Effect of Combination of C_2Cl_6 Degasser and Ultrasonic Field on Hydrogen Content and Mechanical Properties of Aluminum Alloys

作　　者：贾征[1] 乐启炽[1] 张志强[1] 王红玲[1] 崔建忠[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《稀有金属材料与工程》2014年第6期1427-1431,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51074207;50974037);国家"十二五"科技支撑计划课题(2011BAE22B03);国家"十二五"科技支撑计划子课题(2012BAF09B01);国家"973"计划课题(2013CB632203);东北大学博士研究生科研创新项目(N100609002);中国博士后科学基金资助项目(20100471468)

摘　　要：研究了C2Cl6除气剂-超声联合处理对铝合金(Al-3.06%Si,Al-3.21%Mg和2024合金)氢含量及2024合金力学性能的影响。结果表明:联合处理可大幅度缩短超声除气时间。联合除气后对2024合金力学性能影响很大:铸锭的抗拉强度及延伸率比未除气时分别提高了28.3%及92.3%(最大增幅),除气处理对2024合金的屈服强度影响很小,仅提高6.7%(最大增幅)。另外,除气后断裂方式从脆性断裂向微孔聚集型断裂转变,最终提高了力学性能。The effects of combined C2Cl6 degasser and ultrasonic treatment on the hydrogen content in the Al-3.06%Si, Al-3.21%Mg and 2024 aluminum alloys and the mechanical properties of 2024 aluminum alloy were studied. The results show that the degassing time with a single ultrasonic treatment is greatly shortened by the combined treatment. Furthermore, the mechanical properties of the 2024 alloy are also significantly affected by the combined treatment： the tensile strength and elongation are increased by 28.3% and 92.3% （maximum increase）, respectively, compared with those without any treatment. However, the yield strength is slightly affected by the degassing treatment （with an increase of only 6.7%, maximum increase）. In addition, with the degassing treatment, the fracture mode is transformed from brittle fracture to microvoid coalescence fracture, improving the mechanical properties of the alloy.

关 键 词：超声除气 C2Cl6除气剂 铝合金 氢含量 力学性能 

分 类 号：TG663[金属学及工艺—金属切削加工及机床] TG146.21[一般工业技术—材料科学与工程]