一、什么是二次再結(jié)晶，鋁板生產(chǎn)廠家為大家介紹一下：
　　1、 What is secondary recrystallization? The aluminum plate manufacturer will introduce it to you:
　　二次再結(jié)晶是5052鋁板再結(jié)晶基體中大部分晶粒生長趨勢小(相對穩(wěn)定)，只有少數(shù)晶粒能快速生長的現(xiàn)象。那么二次再結(jié)晶所需的棒材是什么呢?它是基體的穩(wěn)定，即阻礙了晶粒的正常生長。在那種情況下，因為某種周長，對吧?如果不阻礙晶粒的生長，它們將成為二次再結(jié)晶的核心。
　　Secondary recrystallization is the phenomenon that most of the grains in the recrystallized matrix of 5052 aluminum plate have a small growth trend (relatively stable), and only a few grains can grow rapidly. So what is the bar for secondary recrystallization? It is the stability of the matrix, which hinders the normal growth of grains. In that case, because of a certain perimeter, right? If they don't hinder the growth of grains, they will become the core of secondary recrystallization.

　　二、影響二次再結(jié)晶的幾個因素
　　2、 Several factors affecting secondary recrystallization
　　(1)分散體
　　(1) dispersions
　　彌散對晶粒的正常生長有更明顯的阻滯作用。物種阻滯及其分散、體積分數(shù)、分布、聚集和溶解?力。如果障礙小，晶粒就會正常生長。如果阻礙較大(如分散相的體積分數(shù)較大，則重結(jié)晶晶粒過早穩(wěn)定，不僅會阻礙正常生長，還會使部分晶粒難以獲得偶然生長的機會。只有在分散點上，對谷物生長的阻力才很強，而且由于某些原因(更重要的是溫度的升高)，它們在局部聚集或溶解，從而降低了對某些谷物生長的阻力。在這種情況下，這些晶?？赡艹蔀槎卧俳Y(jié)晶核。因此，由分散粒子引起的二次再結(jié)晶只能在退火溫度下逐漸開始聚集和粗化。當它溶解時，它可能會發(fā)生。鋁合金的二次再結(jié)晶與合金元素有關(guān)。鋁合金中的鐵?當錳、鉻等元素生成時，F(xiàn)eAl3、MnAl6、CrAl3等彌散相被阻斷。再結(jié)晶晶粒均勻生長。但當加熱到高溫時，少數(shù)晶粒的晶界會發(fā)生彌散。由于先溶解而消失，這些顆粒就會先迅速生長，形成幾個非常大的嗎?谷物。在一種條件下，錳、鉻等元素可以細化晶粒結(jié)構(gòu)，但在另一種條件下，它們可能促進二次再結(jié)晶，從而獲得較厚或不均勻的厚結(jié)構(gòu)。
　　Dispersion has the most obvious blocking effect on the normal growth of grains. Species retardation and its dispersion, volume fraction, distribution, aggregation and dissolution forces. If the barrier is small, the grains will grow normally. If the obstruction is large (for example, if the volume fraction of the dispersed phase is large, the recrystallized grains will be early stable, which will not only hinder the normal growth, but also make it difficult for some grains to obtain the chance of accidental growth. Only at the dispersion point, the resistance to grain growth is very strong, and because of some reasons (the most important is the rise of temperature), they gather or dissolve locally, thus reducing the resistance to the growth of some grains. In this case, these grains may become secondary recrystallization nuclei. Therefore, the secondary recrystallization caused by dispersed particles can only start to aggregate and coarsen gradually at annealing temperature. When it dissolves, it can happen. The secondary recrystallization of aluminum alloy is first related to alloy elements. When the elements such as manganese and chromium are formed, the dispersion phases such as feal3, mnal6 and cral3 are blocked. The recrystallized grains grow uniformly. However, when heated to high temperature, a few grain boundaries will disperse. Will these particles grow rapidly and form several very large grains as they dissolve and disappear first. In one condition, manganese, chromium and other elements can refine the grain structure, but in another condition, they may promote the secondary recrystallization, so as to obtain thicker or uneven thick structure.
　　(2)紋理
　　(2) texture
　　如果5052鋁板再結(jié)晶后產(chǎn)生再結(jié)晶織構(gòu)，就會產(chǎn)生“織構(gòu)制動效應(yīng)”。但在明顯的取向材料中，總是存在少量不同取向的晶粒。對吧?如果這些顆粒的大小很小或者等于平均大小，它們就會被周圍的顆粒吸收。如果這些取向的晶粒尺寸大于平均晶粒尺寸，就會發(fā)生生長并開始二次再結(jié)晶過程。原始再結(jié)晶織構(gòu)越完善，越抑制正常生長，二次再結(jié)晶越明顯。
　　If the recrystallization texture is produced after the recrystallization of 5052 aluminum plate, the "texture braking effect" will be produced. However, there are always a few grains with different orientations in the obviously oriented materials. Right? If these particles are small or equal to the average size, they will be absorbed by the surrounding particles. If the grain size of these orientations is larger than the average grain size, growth will occur and the secondary recrystallization process will begin. The more perfect the original recrystallization texture, the more inhibition of normal growth, the more obvious the secondary recrystallization.
　　(3)板厚度
　　(3) plate thickness
　　當5052鋁板的晶粒尺寸達到厚度的2-3倍時，正常的晶粒生長完全停止。但當各晶粒自由表面(平板表面)的表面能不同時，表面能較低的晶粒長大。由于再結(jié)晶晶粒在鋁板中的擇優(yōu)取向，它們中的大多數(shù)具有相似的自由表面能，只有少數(shù)具有一定取向差異的晶粒具有不同的表面能。這一小部分具有低表面能的晶粒將成為二次再結(jié)晶核。理論證明，在此條件下的二次再結(jié)晶不要求晶核尺寸大于平均晶粒尺寸，而僅要求表面能差。
　　When the grain size of 5052 aluminum plate reaches 2-3 times of the thickness, the normal grain growth stops completely. However, when the surface energy of the free surface (flat surface) of each grain is different, the grains with lower surface energy grow up. Due to the preferred orientation of recrystallized grains in aluminum plate, most of them have similar free surface energy, and only a few grains with certain orientation difference have different surface energy. This small part of grains with low surface energy will become the secondary recrystallization nucleus. It is theoretically proved that the second recrystallization under this condition requires only surface energy difference instead of the grain size larger than the average grain size.
　　(4)退火氣氛
　　(4) Annealing atmosphere
　　自由表面能與表面吸附有關(guān)，所以它不僅與退火溫度有關(guān)，而且與鋁板的退火氣氛有關(guān)。因此，同樣的材料可以通過改變氣氛來控制產(chǎn)生不同類型的二次再結(jié)晶。該材料被轉(zhuǎn)化為另一種二次再結(jié)晶。這種二次再結(jié)晶的轉(zhuǎn)變稱為三次再結(jié)晶。從現(xiàn)象上看，第三次再結(jié)晶是大晶粒與小晶粒的結(jié)合過程。
　　The free surface energy is related to the surface adsorption, so it is not only related to the annealing temperature, but also to the annealing atmosphere of aluminum plate. Therefore, the same material can be controlled to produce different types of secondary recrystallization by changing the atmosphere. The material is transformed into another secondary recrystallization. This transformation of secondary recrystallization is called tertiary recrystallization. From the phenomenon point of view, the third recrystallization is the combination process of large grains and small grains.
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　　The above is the relevant content introduced by the aluminum plate manufacturer for you. To learn more, please visit the website: http://www.jndclyxgs.com