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文献[1—3]表明,添加少量镁可以使铝合金的再结晶温度升高[1.2等]。仅在镁进入固溶体而不形成残余相粗大质点的情况下,再结晶温度才会升高[2]。本文阐述了镁含量对Al-6％Zn-(0.2～1.2)％Mg-0.6％Mn-0.2％Zr合金冷轧板组织的热稳定性之影响的研究结果。直径92毫米的铸锭是连续浇铸而成的。合金中铁和硅的含量不超过0.04％。用连续不断地向熔体中补配镁的方法使镁含量浮动于0.2～1.2％。共浇铸了9个铸锭,其成份差别仅仅是镁的含量不同。铸锭在460℃下进行24小时均匀化处理,随后在空气中冷却,然后再加热到360℃,并以0.02米/秒的速度挤压成截面为6×80毫米的带材。挤压后全部合金带材不管镁元素含量如何,都具有未再结晶的(多边化)组织。挤压后把部分
Literature [1-3] shows that adding a small amount of magnesium can make the recrystallization temperature of aluminum alloy increase [1.2, etc.]. The recrystallization temperature increases only when magnesium enters the solid solution without forming coarse particles of the residual phase [2]. In this paper, the effect of magnesium content on the thermal stability of cold-rolled Al-6% Zn- (0.2-1.2)% Mg-0.6% Mn-0.2% Zr alloy sheets was described. The 92 mm diameter ingot is cast in succession. Alloy iron and silicon content of not more than 0.04%. The method of continuously adding magnesium to the melt floats the magnesium content from 0.2 to 1.2%. A total of 9 cast ingots, the composition difference is only the content of magnesium is different. The ingot was homogenized at 460 ° C for 24 hours, then cooled in air and then reheated to 360 ° C, and extruded into a strip having a cross-section of 6 × 80 mm at a speed of 0.02 m / sec. All of the extruded alloy strip had unrecrystallized (multilateralized) texture regardless of the magnesium content. After squeezing the part