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本文说明了各种最终形变热处理对 Al-Zn-Mg-Cu 系合金机械性能的影响。其结果概述如下:1、用最终形变热处理的方法处理过的 Al-Zn-Mg-Cu 合金板材与用一般方法处理的板材相比,强度与延伸率的关系良好,强度更高。2、为了用最终形变热处理方法显著地改善机械性能,最好在淬火后进行充分的予时效,以30%以下的变形率进行温轧,然后在比一般 T6处理稍低的温度下最终时效。3、经过最终形变热处理的7178合金的强度与延伸率的关系比7075合金的更好。用最终形变热处理方法处理的7178合金板的屈服强度可增大到70公斤/毫米~2。4、用最终形变热处理方法处理过的7178高纯合金显出强度与延伸率的关系与一般纯度的金属相同。
This article describes the effects of various final heat treatments on the mechanical properties of Al-Zn-Mg-Cu alloys. The results are summarized as follows: 1. The Al-Zn-Mg-Cu alloy sheets treated by the final heat treatment have a good strength-elongation relationship and strength compared with those treated by the conventional method. 2. In order to significantly improve the mechanical properties by the ultimate deformation heat treatment, it is preferable to perform sufficient pre-aging after quenching, warm-rolling at a deformation rate of 30% or less, and then finish aging at a slightly lower temperature than the ordinary T6 treatment. The relationship between the strength and elongation of 7178 alloy after the final deformation heat treatment is better than that of 7075 alloy. The yield strength of the 7178 alloy plate treated with the final deformation heat treatment can be increased to 70 kg / mm2.4. The relationship between the strength and elongation of the 7178 high purity alloy treated with the final deformation heat treatment shows a relationship with the elongation The same metal.