冷却速率对直接淬火钢组织和性能的影响
Effect of Cooling Rate on Microstructures and Properties of Directly Quenched Steel
摘 要
对含微量硼的钢与无硼钢在不同冷速下直接淬火试样的组织进行了观察,分别测定了含硼钢与无硼钢的连续冷却转变(CCT)曲线,以及轧制后不同温度回火试样的拉伸强度.结果表明:硼的添加会使贝氏体转变Bs点降低,生成粗大的针状或板条状贝氏体组织,这种贝氏体组织越多,它的强度就越低;无硼钢在慢冷情况下(15 ℃/s),Bs点较高,易于形成粒状贝氏体组织,该组织与马氏体形成的混合组织使强度较高.为避免粗大贝氏体区,对于含硼钢,适宜采用快速冷却;而对于无硼钢,应尽量降低冷却速率.
冷却速率
贝氏体转变点
力学性能
direct quenching
cooling rate
bainite start point
mechanical property
Abstract
The microstructure of two kinds of directly quenched steel specimens was observed,CCT curves of them were measured,and tensile test was performed with tempered specimens at different tempering temperatures after rolling.The bainite start point (Bs) decrease when boron was added and bainite ferrite with large acicular or lathy shape led to low strength.However,for the boron free steel at a slower cooling rate,grain bainite is apt to be transformed because Bs was much higher than that of boron bearing steel.And this kind of bainite mixed with martensite can achieve good strength.Therefore,to avoid of large bainite transformation region,fast cooling rate is appropriate for the boron bearing steel,but for the boron free steel,lower cooling rate is preferable.
中图分类号 TG335 TG162.8
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收稿日期 2006/2/13
修改稿日期 2006/4/20
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备注梁晓军(1977-),男,江苏海门人,硕士.
引用该论文: LIANG Xiao-jun,JIAO Shi-hai,WANG Cong,JIANG Hong-sheng. Effect of Cooling Rate on Microstructures and Properties of Directly Quenched Steel[J]. Materials for mechancial engineering, 2007, 31(2): 16～18
梁晓军,焦四海,王聪,姜洪生. 冷却速率对直接淬火钢组织和性能的影响[J]. 机械工程材料, 2007, 31(2): 16～18
被引情况:
【1】郑英,张劲,范世通,邓运来, "基于辊底式喷淋淬火技术的铝合金分级淬火工艺",机械工程材料 38, 44-47(2014)
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参考文献
【1】Chiaki Ouchi.Development of steel plates by intensive use of TMCP and direct quenching processes[J].ISIJ International,2001,41(6):542-553.
【2】潘大刚.直接淬火工艺对中厚板组织性能的影响[D].沈阳:东北大学,2004.
【3】Lee Chang-sun,Choo Wung-yong.Effects of austenite condition and hardenability on mechanical properties of B-containing high strength steels[J].ISIJ International,2000,40(Suppl):S189-S193.
【4】Dhua S K,Mukerjee D,Sarma D S.Influence of thermomechanical treatments on the microstructure and mechanical properties of HSLA-100 steel plates[J].Metallurgical and Materials Transactions A,2003,34A(2):241-253.
【5】Chang Woong-seong.Microstructure and mechanical properties of 780 MPa high strength steels produced by direct-quenching and tempering process[J].Journal of Materials Science,2002,37:1973-1979.
【6】林慧国,傅代直.钢的奥氏体转变曲线——原理、测试与应用[M].北京:机械工业出版社,1988.
【7】方鸿生.贝氏体相变[M].北京:科学出版社,1999.
【2】潘大刚.直接淬火工艺对中厚板组织性能的影响[D].沈阳:东北大学,2004.
【3】Lee Chang-sun,Choo Wung-yong.Effects of austenite condition and hardenability on mechanical properties of B-containing high strength steels[J].ISIJ International,2000,40(Suppl):S189-S193.
【4】Dhua S K,Mukerjee D,Sarma D S.Influence of thermomechanical treatments on the microstructure and mechanical properties of HSLA-100 steel plates[J].Metallurgical and Materials Transactions A,2003,34A(2):241-253.
【5】Chang Woong-seong.Microstructure and mechanical properties of 780 MPa high strength steels produced by direct-quenching and tempering process[J].Journal of Materials Science,2002,37:1973-1979.
【6】林慧国,傅代直.钢的奥氏体转变曲线——原理、测试与应用[M].北京:机械工业出版社,1988.
【7】方鸿生.贝氏体相变[M].北京:科学出版社,1999.
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