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摘要：
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为了研究加热温度对退火态2219铝合金板材力学性能和微观组织的影响，在25~300 ℃温度范围内，对退火态2219铝合金板材进行单向拉伸试验。结果表明：退火态2219铝合金板材的强度随着加热温度的升高而降低，伸长率随着加热温度的升高显著增加，从室温状态下的31.50%升至300 ℃下的59.75%，塑性得到明显改善；退火态2219铝合金板材加热至一定温度再冷却至室温，然后进行固溶时效热处理，材料强度基本不发生变化，伸长率随加热温度的增加有所降低，从室温状态下的19.70%降至300 ℃下的15.04%，同时微观组织无明显差异，说明在一定温度范围内加热对2219铝合金板材的最终力学性能没有影响。
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In order to study the influences of heating temperature on the mechanical properties and microstructure for annealed 2219 aluminum alloy sheet, the uniaxial tensile test of annealed 2219 aluminum alloy sheet was carried out in the temperature range of 25-300 ℃. The results show that the strength of annealed 2219 aluminum alloy sheet decreases with the increasing of heating temperature, and the elongation increases significantly with the increasing of heating temperature from 31.50% at room temperature to 59.75% at 300 ℃, so the plasticity is significantly improved. However, after annealed 2219 aluminum alloy sheet is heated to a certain temperature and then cooled to the room temperature, and then subjected to solution aging heat treatment, the strength of material does not change basically, and the elongation decreases with the increasing of heating temperature from 19.70% at room temperature to 15.04% at 300 ℃. At the same time, there is no significant difference in microstructure, indicating that heating within a certain temperature range has no effect on the final mechanical properties of 2219 aluminum alloy sheet.
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基金项目：
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作者简介：
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张下陆（1985-），男，硕士，工程师，E-mail： zxl613@126.com
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参考文献：
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