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借助金相显微镜、透射电镜、拉伸测试、抗弹性能测试等手段研究T9I6新型形变热处理对2519A铝合金组织、力学性能和抗弹性能的影响。经T9I6工艺处理的2519A铝合金,其屈服强度、抗拉强度、伸长率分别达到501 MPa、540 MPa、14%。30 mm厚的2519A-T9I6铝合金板材的极限穿透速度达715 m/s。弹坑侧壁组织随着弹孔深度的变化而变化。T9I6热处理工艺中的断续时效阶段是2519A铝合金性能提升的关键。低温下的时效使得GP区变得密集,从而使得后续相的析出也变得更为密集、细小。
The effects of T9I6 new heat treatment on the microstructure, mechanical properties and anti-elastic properties of 2519A aluminum alloy were studied by means of optical microscope, transmission electron microscopy, tensile test and anti-elasticity test. The yield strength, tensile strength and elongation of 2519A aluminum alloy treated by T9I6 process are 501 MPa, 540 MPa and 14% respectively. The 30 mm thick 2519A-T9I6 aluminum alloy plate has an ultimate penetration of 715 m / s. The side wall structure of the crater varies with the depth of the bullet hole. T9I6 heat treatment process of intermittent aging stage is 2519A aluminum alloy key performance improvement. The aging at low temperature causes the GP zone to become dense, so that the precipitation of subsequent phases also becomes more dense and small.