滚珠钢要求有极高的可变强度,除了易见的或极小的但可以测出的表面缺陷决不允许外,钢的内部组织也应完全均匀,氧化物和硫化物的夹杂必须控制在最小的范围内,组织中所有这些细小的不均匀的现象,均应看做是极小的故障缺陷或内部断口,因此要求此种钢有很高的纯度。 Ball steel requires a very high variable strength, in addition to visible or minimal but measurable surface defects will not allow, the internal structure of the steel should be completely uniform, oxide and sulfide inclusions must be controlled at In the smallest range, all these small, inhomogeneous phenomena in the tissue should be considered as minor fault defects or internal fractures, requiring high purity of this steel.