【摘要】 本试验利用工业化固溶处理的7136铝合金挤压材，开展单级、双级和三级时效工艺研究。结果表明，不同的时效处理，材料的性能差异明显，单级时效处理强度最高，电导率较低，耐蚀性差；双级时效处理可在略微降低强度的前提下，电导率得到较大提升；三级时效（回归再时效）处理工艺复杂，实现合金强度、电导率和断裂韧性的良好匹配。7136铝合金挤压材最高抗拉强度达到700 MPa、伸长率为12%;回归再时效处理综合性能最好，可达到抗拉强度655 MPa,电导率21.9 MS/m,断裂韧性34.8 MPa·m^1/2。更多还原

【Abstract】 The single-stage, two-stage and three-stage aging processes were investigated on 7136 aluminum alloy extrusion material with industrial solution treatment. The results indicate that there are significant differences in the properties of the materials after different aging treatments. After single-stage aging treatment, the material has the highest strength, low conductivity, and poor corrosion resistance. After two-stage aging treatment, the strength slightly decreases and the conductivity significantly increases. The three-stage aging（regression re-aging） treatment is complex, and the strength, conductivity, and fracture toughness of the treated alloy match in a proper way. The 7136 aluminum alloy extrusion material has a maximum tensile strength of 700 MPa and an elongation of 12%. The comprehensive performance of the material reaches the best after regression re-aging treatment, with the tensile strength, conductivity, and fracture toughness reaching 655 MPa, 21.9 MS/m and 34.8 MPa·m^1/2.更多还原