分析了高应力条件下弹簧疲劳断裂的主要原因以及用稀土控制弹簧钢夹杂物形态的局限性.指出了MnO-Al2O3-SiO2或CaO-Al2O3-SiO2三元塑性夹杂物的成分范围,并以60Si2CrVA为例确定与之相平衡的钢液脱氧条件,提出了相应的工艺措施.
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