Experiments on deoxidation with al for ZL18A steels were carried out. The effect of s content on nonmetallicinclusion was observed.
对ZL 18 A钢进行了用铝脱氧、控制钢中夹杂物和酸溶铝含量的研究。
2
The results showed that the major cause of longitudinal surface cracking of 20 steel tube blanks was higher nonmetallicinclusion content in the steel than standard value.