高碳低合金耐磨钢过冷奥氏体组织转变和淬透性

发布时间：2018-06-01 15:43

  本文选题：淬透性曲线 + 连续冷却曲线　； 参考：《材料热处理学报》2015年12期

【摘要】：针对厚度超过140 mm的厚大耐磨工件,设计一种C含量为0.67%~0.73%的Mn-Cr系高碳低合金耐磨钢。利用DIL805A热膨胀仪结合金相—硬度法,测得了该钢的临界点温度A_(c1),A_(c3)以及Ms;并绘制了该材料的过冷奥氏体连续冷却转变曲线(CCT曲线);研究了过冷奥氏体连续冷却过程中组织转变规律;并且利用末端淬火实验研究了该钢的淬透性。结果表明:该钢的CCT曲线大大右移,临界冷却速度为5℃/s;测得了该钢淬透性曲线,淬透层深度达到36 mm,淬透性大大增加。
[Abstract]:A Mn-Cr high carbon low alloy wear-resistant steel with a C content of 0.67% and 0.73% was designed for the thick wear-resistant workpiece with a thickness of more than 140mm. Using DIL805A thermal expansion instrument combined with metallographic hardness method, The critical point temperature A / C _ 1 / A _ C _ (3) and Ms of the steel were measured, and the CCT curve of the supercooled austenite continuous cooling transformation curve was plotted, and the microstructure transformation law during the continuous cooling process of the supercooled austenite was studied. The hardenability of the steel was studied by end quenching experiment. The results show that the CCT curve of the steel is greatly shifted to the right, the critical cooling rate is 5 鈩，

本文编号：1964712