矿用圆环链25MnV钢凝固和冷却过程的组织性能预测  

Microstructure and Properties Prediction of Mining Used Ring Chain 25MnV Steel in Solidification and Cooling Process

作　　者：贺静[1] 朱永丽[1] 

机构地区：[1]重庆工程职业技术学院机械工程学院,重庆400037

出　　处：《热加工工艺》2013年第16期82-84,共3页Hot Working Technology

摘　　要：利用JMatPro软件计算了25MnV钢凝固和冷却过程的组织与性能,得到室温到熔化温度区间的热物理性能参数和部分力学性能的确定值,并进行了分析。结果表明：25MnV钢室温平衡组织为铁素体＋渗碳体＋M（C,N）＋M7C3;在360～703℃,存在高温铁素体相;在900～1453℃存在MNS;奥氏体转变温度687～798℃,固液相温度区间1451～1505℃;在连续冷却过程中当冷速大于100℃/s时,凝固组织中有少量贝氏体和铁素体生成;当冷速在100、0.1℃/s时,凝固组织主要为铁素体、贝氏体和珠光体。The microstmcture and properties of 25MnV steel during the solidification and cooling was calculated by JMatPro Software, and the determined value of thermo-physical properties parameters and mechanical properties between room temperature and melting temperature were obtained. The results show that the equilibrium microstructure of 25MnV steel at room temperature is ferrite ＋cementite ＋M （C,N）＋M7C3. At 360-703 ℃, there are high temperature ferrite phase presented. The MNS exists at 900-1453℃. The austenite transition temperature is 687-798℃, the solid-liquid phase temperature is 1451-1505℃. In the continuous cooling process, when cold speed is greater than 100 ℃/s. There is small amount of bainite and ferrite appearing in the solidification structure. When the cooling rate is between 100 and 0.1 ℃/s, the solidification microstructure is mainly composed of ferrite, bainite and pearlite.

关 键 词：25MNV钢 相图 CCT图 热物理性能 

分 类 号：TG113.1[金属学及工艺—物理冶金]