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因为夹杂物Al_2O_3和MnS能引起铝脱氧钢的各向异性,所以为了弄清楚Ca—Al脱氧剂对控制它们的形态的影响,对用Ca—Al脱氧的铝预脱氧钢作了许多试验,并讨论了以这种脱氧为特征的夹杂物形成的机理,其结果总结如下: 1)钢水中的夹杂物变成由Al_2O_3—CaO—CaS组成的低熔点夹杂物,其中CaS分布均匀。 2)钢锭中的夹杂物变成由Al_2_3—CaO—(CaS)组成的复合型夹杂物,其中CaS在周围沉积。有人认为这种复合型夹杂物是凝固过程中,由于溶解度的下降引起CaS的析出而产生的。 3)铜的各向异性由于控制了夹杂物的形状而得到改善。
Since the inclusions Al 2 O 3 and MnS can cause anisotropy of the aluminum deoxidized steel, many tests were conducted on the aluminum pre-deoxidized steel deoxidized with Ca-Al in order to clarify the influence of the Ca-Al deoxidizer on controlling the morphology thereof The formation mechanism of inclusions characterized by such deoxidation is discussed. The results are summarized as follows: 1) The inclusions in the molten steel become low-melting inclusions composed of Al 2 O 3 -CaO-CaS with uniform CaS distribution. 2) The inclusions in the steel ingot become complex inclusions composed of Al 2 3-CaO- (CaS), in which CaS is deposited. Some people think that this compound inclusions in the solidification process, due to the decline in solubility caused CaS precipitation arising. 3) The anisotropy of copper is improved by controlling the shape of inclusions.