50Mn轴承钢本质晶粒度的研究

Research on Inherent Grain Size of 50Mn Bearing Steel

本文对 5 0 Mn轴承钢本质晶粒度的各种影响因素进行了研究。分析了使其本质晶粒度不合格的原因。提出了在现有正常生产条件下能够使 5 0 Mn轴承钢本质晶粒度级别合格的最佳酸溶铝含量范围。通过适当热处理也可以使酸溶铝含量过高的钢合格。最有效的方法是通过炼钢化学成分的控制 。

This paper makes research on some influencing factors of inherent grain size of 50Mn bearing steel,analysizes the reason for its unqualified inherent grain size.The optium range of acid-soluble aluminium content is put forward to satisfy the inherent grain size under the present production condition.By proper heat treatment,the steel having higher content of acid-soluble aluminium can also be made qualified.The most eflective method is to control the chemical composition on smelting to ensure the inherent grain size.