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固溶溫度對(duì)7B50鋁合金組織與性能的影響
發(fā)布人:上海艾荔艾金屬材料有限公司bt990.com.cn
更新時(shí)間:2015-08-25
采用金相組織(OM)、掃描電鏡(SEM)、透射電鏡(TEM)以及力學(xué)性能測(cè)試研究固溶溫度對(duì)7B50鋁合金固溶程度、組織及力學(xué)性能的影響。
固溶溫度對(duì)7B50鋁合金組織與性能的影響Effects of solution temperature on microstructures and
properties of 7B50 aluminum alloy
采用金相組織(OM)、掃描電鏡(SEM)、透射電鏡(TEM)以及力學(xué)性能測(cè)試研究固溶溫度對(duì)7B50鋁合金固溶程度、組織及力學(xué)性能的影響。結(jié)果表明:在460~480
℃溫度范圍內(nèi),隨著固溶溫度升高,實(shí)驗(yàn)合金的殘余第二相粒子減少,固溶程度增加,相應(yīng)時(shí)效強(qiáng)化效應(yīng)增強(qiáng),再結(jié)晶程度變化不大;當(dāng)固溶溫度高于480
℃后,殘余第二相粒子的溶解沒(méi)有明顯提高,但再結(jié)晶程度加大,且合金組織發(fā)生過(guò)燒,力學(xué)性能明顯惡化;當(dāng)固溶溫度為480
℃時(shí),實(shí)驗(yàn)合金固溶較充分,再結(jié)晶程度不高,此時(shí)合金綜合力學(xué)性能最好,因此,7B50合金的最佳固溶溫度為480 ℃。
The effect of solution temperature on the solid
solubility, microstructure and mechanical properties of 7B50 alloy was studied
by optical microscopy (OM), scanning electron microscopy (SEM), transmission
electron microscopy (TEM) and tensile test. The results show that, with the
solution temperature increasing from 460 ℃ to 480 ℃,the amount of residual
phases decreases the solid solubility increases, and the recrystallization
hardly changes with increasing the solution temperature. The corresponding
ageing strengthening effect enhances. With the solution temperature increasing
above 480 ℃, the amount of residual phases has almost no change and the
recrystallization obviously increases. Alloy burnt obviously decrease the
mechanical properties. Complete dissolution of the particles in the 7B50 alloy
is obtained after solution treatment at 480 ℃.
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