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发明公开
CN107641779A 用于CNC加工的7系铝合金改善残余应力的热处理工艺 无效 - 驳回

用于CNC加工的7系铝合金改善残余应力的热处理工艺
摘要：
本发明提供了一种用于CNC加工的7系铝合金改善残余应力的热处理工艺，该工艺包括：固溶处理、淬火处理、时效处理。经本发明工艺热处理后的板材综合性能优越。抗拉强度：380~500MPa，屈服强度：360~470MPa，延伸率：10~18%，电导率：26~45%IACS，硬度：170~210HV，残余应力：-40~-2MPa；相同铝合金通过T6热处理的性能：抗拉强度：300~430Mpa，屈服强度：280~400MPa，延伸率：5~10%，电导率：20~30 IACS，硬度140~165HV，残余应力：-190~-70MPa。
摘要（英）：

The invention provides a heat treatment technology for improving residual stress of a 7-series aluminum alloy for CNC (Computerized Numerical Control) machining. The technology comprises: solid dissolving treatment, quenching treatment and ageing treatment. A sheet material subjected to heat treatment by the technology has excellent comprehensive performance. The sheet material has the tensile strength of 380MPa to 500MPa, the yield strength of 360MPa to 470MPa, the elongation percentage of 10 percent to 18 percent, the electrical conductivity of 26 percent IACS (International Annealed CopperStandard) to 45 percent IACS, the hardness of 170HV to 210HV and the residual stress of -40MPa to -2MPa; the same aluminum alloy has the following performance after being subjected to T6 heat treatment: the tensile strength is 300MPa to 430MPa, the yield strength is 280MPa to 400MPa, the elongation percentage is 5 percent to 10 percent, the electrical conductivity is 20 IACS to 30 IACS, the hardness is 140HV to 165HV and the residual stress is -190MPa to -70MPa.

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