轧制工艺对中碳锰钢的组织影响
Influence of Rolling Process on Microstructure of Medium Carbon Manganese Steel
李远征1,2, 刘清友2, 贾书君2, 刘荣佩1
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作者单位：(1. 昆明理工大学 材料科学与工程学院, 云南 昆明 650093; 2. 钢铁研究总院结构所, 北京 100081)
中文关键字：中碳锰钢； 珠光体； 热模拟
英文关键字：：medium carbon manganese steel; pearlite; hot compression simulation test
中文摘要：采用热模拟单道次压缩试验研究了形变温度、形变量及冷却速率对中碳锰钢的组织影响。结果表明：在高于A3点(779 ℃)的形变过程中，珠光体体积分数随形变温度的降低先增后减，且在860 ℃附近出现极大值。试样在860 ℃形变后，随形变量的增加，珠光体体积分数逐渐减小；而随冷却速率的提高(≤20 ℃/s)，奥氏体会发生伪珠光体转变，珠光体体积分数呈递增的趋势，同时铁素体晶粒得到细化且主要沿晶界分布，因此通过合理控制形变参数及冷速可获得较理想的铁素体 + 珠光体组织，提高材料的性能。
英文摘要：The effects of cooling rate, deformation temperature and reduction on the microstructure of medium carbon manganese steel were investigated by hot compression simulation test. The results show that, during deformation above A3(779 ℃), the volume fraction of pearlite firstly increases and then decreases with the decrease of deformation temperature, and reaches the maximum at 860 ℃. After deformation at 860 ℃, the volume fraction of pearlite decreases with the increase of deformation reduction, but increases with the increase of cooling rate (≤20 ℃/s), and the pseudo-pearlite can be found, also refines ferrite grain at pearlite boundary, so the proper combination of ferrite and pearlite can be obtained by controlling deformation parameters and cooling rate, witch improves the properties of the steel.