The impact strength of S15A steel austenitized at the same temperature but cooled at different rate was determined.
测定了S15A钢经同一温度奥氏体化不同速度冷却处理后的冲击韧性。
2
The lower heat-treating temperature of the case results from the fact that hypereutectoid steels are normally austenitized for hardening just above the lower critical point.