要提高钢纤维浇注料韧性有什么方法
在测定了钢纤维浇注料的耐压强度,同时了解钢纤维浇注料的成分之后,耐火浇注料还有一个重要性质我们需要了解即韧性,其是控制耐火浇注料裂纹的一个有效途径,那么怎么提高钢纤维浇注料的韧性呢?
After measuring the compressive strength of steel fiber castables and understanding the composition of steel fiber castables, another important property of refractory castables is toughness, which is an effective way to control the cracks of refractory castables. So how to improve the toughness of steel fiber castables?
改善钢纤维浇注料韧性的方法,采取一定的措施,使材料形成某种显微结构,产生耗能机制,阻碍裂纹扩展,提高耐火浇注料的韧性。
In order to improve the toughness of steel fiber castables, some measures should be taken to form some kind of microstructures, generate energy dissipation mechanism, hinder crack propagation and improve the toughness of refractory castables.
钢纤维浇注料中存在结构缺陷,固有气孔和裂纹,在外力的作用下,裂纹容易起动,又缺乏耗能机制,易发生脆性破碎,增韧途径可以对显微结构进行控测,减小裂纹的尺寸,控制杂质和气孔的数量和分布等。也可以通过增加能量耗散机构和设置障碍,阻止裂纹扩展。相变增韧、显微裂纹增韧等都可产生耗能机构。弥散第二相颗粒,可使裂纹扩展遇到障碍,发生裂纹偏转增韧。这些措施都可以阻碍裂纹进一步扩展,提高材料韧性,从而提高耐火浇注料的抗热震性。
There are structural defects, inherent pore and crack in steel fiber castables. Under the action of external force, crack is easy to start and energy dissipation mechanism is lacking, brittle fracture is easy to occur. Toughening way can control the microstructure, reduce the size of crack, control the number dibanhw.37ix.com.cnbianyaqisx.37ix.com.cnmojuhp.37ix.com.cn mojujcj.37ix.com.cn mojugsn.37ix.com.cnmojuly.37ix.com.cnand distribution of impurities and pore, etc. Crack propagation can also be prevented by increasing energy dissipation mechanism and setting obstacles. Energy dissipation mechanism can be produced by phase transformation toughening and micro-crack toughening. Dispersion of second-phase particles can make crack propagation encounter obstacles and cause crack deflection and toughening. These measures can hinder further crack propagation and improve material toughness, thereby improving thermal shock resistance of refractory castables.