【摘要】：用Formastor-F型熱膨脹儀測定了U76CrRE鋼的CCT曲線;研究了冷卻速率對鋼組織和硬度的影響。結(jié)果表明,U76CrRE鋼發(fā)生珠光體轉(zhuǎn)變的臨界冷速為2.00℃/s;當(dāng)冷速小于等于2.00℃/s時,得到的組織為珠光體和少量鐵素體;當(dāng)冷速大于2.00℃/s時,轉(zhuǎn)變產(chǎn)物中出現(xiàn)馬氏體;實驗鋼的硬度隨冷速的增加而增大。U76CrRE稀土鋼軌在溫度略高于522℃進行等溫轉(zhuǎn)變時可獲得片間距細小的珠光體組織,硬度可滿足熱處理鋼軌的性能要求。
[Abstract]:The CCT curve of U76CrRE steel was measured by Formastor-F thermal expansion instrument, and the effect of cooling rate on the microstructure and hardness of U76CrRE steel was studied. The results show that the critical cooling rate of pearlite transformation in U76CrRE steel is 2.00 鈩，

本文編號：2352534