C2Cl6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 C2Cl6 Degasser and Ultrasonic Field on Hydrogen Content and Mechanical Properties of Aluminum Alloys

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。

Abstract:

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.