我厂有一种铝合金冲压件,材料是LY12铝板,要求淬火、时效48h后抗拉强度σ_b≥410MPa。由于零件淬火后即进行冲压矫正工序,而此时自然时效还没到时间,抗拉强度还没达到峰值,故淬火效果好坏无法肯定。可是,四昼夜后零件已经全部进行了矫正,此时如果抗拉强度不合格,产品就无法挽救了,只好报废。 I plant an aluminum stamping parts, the material is LY12 aluminum, quenching, aging 48h tensile strength σ_b ≥ 410MPa. As part of the quenching after stamping correction process, but this time has not yet reached the natural aging, tensile strength has not yet reached the peak, so the quenching effect is not sure. However, four days and nights after the parts have been all corrected, this time if the tensile strength failed, the product can not be saved, had no choice but to scrap.