含铜低碳硅锰钢的连续冷却转变曲线及显微组织
Continuous Cooling Transformation Curves and Microstructures of Copper Bearing Low-Carbon Si-Mn Steel
摘 要
通过Gleeble-3800型热模拟试验机测出含铜低碳硅锰钢在不同冷却速率（1～150 ℃·s-1）下连续冷却的热膨胀曲线，绘制出该钢的连续冷却转变（CCT）曲线；结合金相观察及显微硬度测试分析了冷却速率对相变组织及硬度的影响。结果表明：冷却速率在1～5 ℃·s-1时，显微组织主要为铁素体+珠光体；当冷速为10 ℃·s-1时组织中出现马氏体，随着冷速增大，马氏体含量增多，珠光体发生退化并逐渐减少，铁素体总量减少，其中针状铁素体增加而多边形铁素体减少并消失；冷却速率超过120 ℃·s-1后，针状铁素体基本消失，显微组织为马氏体+少量残余奥氏体；试验钢显微硬度随冷却速率的增大而增加。
CCT曲线
显微组织
copper bearing low-carbon Si-Mn steel
continuous cooling transformation curve
microstructure
Abstract
The dilatometric curves of the copper bearing low-carbon Si-Mn steel at different cooling rates (1-150 ℃·s-1) were determined by Gleeble-3800 thermal mechanical simulator. And the continuous cooling transformation (CCT) curves of the steel were obtained. The effects of the cooling rates on the microstructure evolution and microhardness were also analyzed with the microstructure observation and hardness measurement. The results show that at the cooling rate between 1-5 ℃·s-1, the microstructure mainly consisted of ferrite and pearlite. The martensite appeared at the cooling rate of 10 ℃·s-1 and the content increased with the increase of cooling rate, meanwhile the pearlite degenerated and decreased and the content of ferrite also decreased, among which the acicular ferrite increased and polygonal ferrite decreased then disappeared. The acicular ferrite disappeared and the microstructure consisted of martensite and retained austenite when the cooling rate was higher than 120 ℃·s-1. The microhardness of the steel increased with the cooling rate increase.
中图分类号 TG156.1 DOI 10.11973/jxgccl201512023
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目（51574107）；河北省自然科学基金资助项目（E2014209191）；河北省教育厅科研项目（YQ2013003）；唐山市科学技术研究项目（14130228B）
收稿日期 2015/4/10
修改稿日期 2015/8/25
网络出版日期
作者单位点击查看
备注陈连生（1968-），男，河北唐山人，教授，博士。
引用该论文: CHEN Lian-sheng,MI Zhen-peng,TIAN Ya-qiang,SONG Jin-ying,WEI Ying-li,ZHENG Xiao-ping,XU Jing-hui. Continuous Cooling Transformation Curves and Microstructures of Copper Bearing Low-Carbon Si-Mn Steel[J]. Materials for mechancial engineering, 2015, 39(12): 98～101
陈连生,米振鹏,田亚强,宋进英,魏英立,郑小平,徐静辉. 含铜低碳硅锰钢的连续冷却转变曲线及显微组织[J]. 机械工程材料, 2015, 39(12): 98～101
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】徐光,王巍,张鑫强,等.金属材料CCT曲线测定及绘制［M］.北京:化学工业出版社, 2009.
【2】崔忠圻,刘北兴.金属学与热处理原理［M］.哈尔滨:哈尔滨工业大学出版社, 2004.
【3】SPEER J G, MATLOCK D K, DE COOMAN B C, t al.Carbon partitioning into austenite aftermartensite transformation［J］. Acta Materialia, 2003,51(9):2611-2622.
【4】SPEER J G, EDMONDS D V, RIZZO F C, t al.Partitioning of carbon from supersaturated plates of ferrite with application to steel processing and fundamentals of the bainite transformation［J］.Current Opinion in Solid State and Materials Science, 2004,8(3):219-237.
【5】江海涛,唐荻,米振莉.汽车用先进高强度钢的开发及应用进展［J］.钢铁研究学报, 2007,19(8):1-5.
【6】周文浩,谢振家,尚成嘉,等.700 MPa级高强高塑低碳低合金钢的多相组织调控及性能［J］.金属学报, 2015,51(4): 407-416.
【7】任勇强,谢振家,张宏伟,等.前躯体组织对C-Si-Mn钢组织特征及力学行为的影响［J］.金属学报, 2013,49(12): 1558-1566.
【8】刘庆东.HSLA铁素体钢中Cu析出强化和奥氏体韧化的原子探针层析技术研究［D］.上海：上海大学, 2012.
【9】KIM S J, LEE C G, LEE T H, t al.Effect of Cu, Cr and Ni on mechanical properties of 0.15 wt.% C TRIP-aided cold rolled steels［J］. Scripta Materialia, 2003,48(5):539-544.
【10】向红亮,范金春,刘东,等.抗菌时效处理对含Cu双相不锈钢组织和性能的影响I.富Cu相的微观结构及演变规律［J］.金属学报, 2012,48(9):1081-1088.
【11】田亚强,张宏军,陈连生,等.低碳高强钢合金元素配分行为对残余奥氏体和力学性能的影响［J］.金属学报, 2014,50(5):531-539.
【12】陈连生,张健杨,田亚强,等.预先Mn配分处理对Q&P钢中C配分及残余奥氏体和力学性能的影响［J］.金属学报, 2014,51(5):527-536.
【13】王立军,蔡庆伍,余伟,等.低碳低合金钢的连续冷却相变组织特征及其形成机制［J］.材料工程, 2010（8）:29-33.
【14】蔡恒君,高喆,宋仁伯,等.低碳低合金高强钢的连续转变行为及其相变模型［J］.材料热处理学报, 2015,36(3):214-219.
【2】崔忠圻,刘北兴.金属学与热处理原理［M］.哈尔滨:哈尔滨工业大学出版社, 2004.
【3】SPEER J G, MATLOCK D K, DE COOMAN B C, t al.Carbon partitioning into austenite aftermartensite transformation［J］. Acta Materialia, 2003,51(9):2611-2622.
【4】SPEER J G, EDMONDS D V, RIZZO F C, t al.Partitioning of carbon from supersaturated plates of ferrite with application to steel processing and fundamentals of the bainite transformation［J］.Current Opinion in Solid State and Materials Science, 2004,8(3):219-237.
【5】江海涛,唐荻,米振莉.汽车用先进高强度钢的开发及应用进展［J］.钢铁研究学报, 2007,19(8):1-5.
【6】周文浩,谢振家,尚成嘉,等.700 MPa级高强高塑低碳低合金钢的多相组织调控及性能［J］.金属学报, 2015,51(4): 407-416.
【7】任勇强,谢振家,张宏伟,等.前躯体组织对C-Si-Mn钢组织特征及力学行为的影响［J］.金属学报, 2013,49(12): 1558-1566.
【8】刘庆东.HSLA铁素体钢中Cu析出强化和奥氏体韧化的原子探针层析技术研究［D］.上海：上海大学, 2012.
【9】KIM S J, LEE C G, LEE T H, t al.Effect of Cu, Cr and Ni on mechanical properties of 0.15 wt.% C TRIP-aided cold rolled steels［J］. Scripta Materialia, 2003,48(5):539-544.
【10】向红亮,范金春,刘东,等.抗菌时效处理对含Cu双相不锈钢组织和性能的影响I.富Cu相的微观结构及演变规律［J］.金属学报, 2012,48(9):1081-1088.
【11】田亚强,张宏军,陈连生,等.低碳高强钢合金元素配分行为对残余奥氏体和力学性能的影响［J］.金属学报, 2014,50(5):531-539.
【12】陈连生,张健杨,田亚强,等.预先Mn配分处理对Q&P钢中C配分及残余奥氏体和力学性能的影响［J］.金属学报, 2014,51(5):527-536.
【13】王立军,蔡庆伍,余伟,等.低碳低合金钢的连续冷却相变组织特征及其形成机制［J］.材料工程, 2010（8）:29-33.
【14】蔡恒君,高喆,宋仁伯,等.低碳低合金高强钢的连续转变行为及其相变模型［J］.材料热处理学报, 2015,36(3):214-219.
相关信息
