铝板生产厂家

哪些方面会影响到5052铝板二次再结晶?

来源:  发布时间:2020-04-17 13:39:55  

  一、什么是二次再结晶,铝板生产厂家为大家先容一下:
  1、 What is secondary recrystallization? The aluminum plate manufacturer will introduce it to you:
  二次再结晶是5052铝板再结晶基体中大部分晶粒生长趋势小(相对稳定),只有少数晶粒能快速生长的现象。那么二次再结晶所需的棒材是什么呢?它是基体的稳定,即阻碍了晶粒的正常生长。在那种情况下,因为某种周长,对吧?如果不阻碍晶粒的生长,它们将成为二次再结晶的核心。
  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.

铝板生产厂家
  二、影响二次再结晶的几个因素
  2、 Several factors affecting secondary recrystallization
  (1)分散体
  (1) dispersions
  弥散对晶粒的正常生长有更明显的阻滞作用。物种阻滞及其分散、体积分数、分布、聚集和溶解?力。如果障碍小,晶粒就会正常生长。如果阻碍较大(如分散相的体积分数较大,则重结晶晶粒过早稳定,不仅会阻碍正常生长,还会使部分晶粒难以获得偶然生长的机会。只有在分散点上,对谷物生长的阻力才很强,而且由于某些原因(更重要的是温度的升高),它们在局部聚集或溶解,从而降低了对某些谷物生长的阻力。在这种情况下,这些晶粒可能成为二次再结晶核。因此,由分散粒子引起的二次再结晶只能在退火温度下逐渐开始聚集和粗化。当它溶解时,它可能会发生。铝合金的二次再结晶首先与合金元素有关。铝合金中的铁?当锰、铬等元素生成时,FeAl3、MnAl6、CrAl3等弥散相被阻断。再结晶晶粒均匀生长。但当加热到高温时,少数晶粒的晶界会发生弥散。由于先溶解而消失,这些颗粒就会先迅速生长,形成几个非常大的吗?谷物。在一种条件下,锰、铬等元素可以细化晶粒结构,但在另一种条件下,它们可能促进二次再结晶,从而获得较厚或不均匀的厚结构。
  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)纹理
  (2) texture
  如果5052铝板再结晶后产生再结晶织构,就会产生“织构制动效应”。但在明显的取向材料中,总是存在少量不同取向的晶粒。对吧?如果这些颗粒的大小很小或者等于平均大小,它们就会被周围的颗粒吸取。如果这些取向的晶粒尺寸大于平均晶粒尺寸,就会发生生长并开始二次再结晶过程。原始再结晶织构越完善,越抑制正常生长,二次再结晶越明显。
  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
  当5052铝板的晶粒尺寸达到厚度的2-3倍时,正常的晶粒生长完全停止。但当各晶粒自由表面(平板表面)的表面能不同时,表面能较低的晶粒长大。由于再结晶晶粒在铝板中的择优取向,它们中的大多数具有相似的自由表面能,只有少数具有一定取向差异的晶粒具有不同的表面能。这一小部分具有低表面能的晶粒将成为二次再结晶核。理论证明,在此条件下的二次再结晶不要求晶核尺寸大于平均晶粒尺寸,而仅要求表面能差。
  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)退火气氛
  (4) Annealing atmosphere
  自由表面能与表面吸附有关,所以它不仅与退火温度有关,而且与铝板的退火气氛有关。因此,同样的材料可以通过改变气氛来控制产生不同类型的二次再结晶。该材料被转化为另一种二次再结晶。这种二次再结晶的转变称为三次再结晶。从现象上看,第三次再结晶是大晶粒与小晶粒的结合过程。
  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.
  以上是铝板生产厂家为大家先容的相关内容,想要了解更多内容,欢迎访问网站:
  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

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