5083-H321铝合金板材生产工艺研究

Technical Study on 5083-H321 Aluminum Alloy Sheet

摘要: 通过正交试验法与极差分析法研究了冷变形量、稳定化退火温度、稳定化退火时间对5083铝合金板材力学性能的影响，试验结果表明：在冷变形量为10%~25%、退火温度140℃~200℃、保温时间0.5~3 h范围内，三因素对力学性能的影响主次顺序为：冷变形量 > 稳定化退火时间 > 稳定化退火温度。3 mm厚5083-H321铝合金优选工艺范围为：变形量20%~25%、退火制度160℃~180℃/2h。进一步研究表明，当冷变形量为20%、退火制度为180℃/2h时，试样可获得最佳的综合性能：抗拉强度为328 MPa、屈服强度为256 MPa、延伸率为16.4%，晶间腐蚀质量损失量为18.7 mg/cm2，腐蚀深度为48 um。

Abstract: The effects of cold deformation, stabilizing annealing temperature and stabilizing annealing time on the mechanical properties of 5083 aluminum alloy sheet were studied by means of orthogonal experiment and range analysis in this paper. The results indicated that the significance of three factors in affecting the mechanical properties of 5083 aluminum alloy sheets was in a descending order as: cold deformation, stabilizing annealing time, stabilizing annealing temperature, when cold deformed 20% - 25%, then under annealing processing, 140˚C - 200˚C/0.5 h - 3 h, treated. The optimum range of 5083-H321 aluminum alloy sheets was 20% - 25% cold deformation and 160˚C - 180˚C/2h annealing treatment. Further study showed that the best comprehensive properties could be obtained after 180˚C/2h annealed, the results were listed as follows: the tensile strength of 328 MPa, yield strength of 256 MPa, the elongation was 16.4%, intergranular corrosion mass loss was 18.7 mg/cm2, corrosion depth of 48 um when the cold deformation of 20% and annealing at 180˚C/2h.