Effect of Finished Rolling Cooling Rate on Structure of Microalloy Non Quenched-Tempered Steel 34Mn2VN

Special Steel ›› 2006, Vol. 27 ›› Issue (6): 24-26.

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Effect of Finished Rolling Cooling Rate on Structure of Microalloy Non Quenched-Tempered Steel 34Mn2VN

Zhang Yusheng^1,2,Liu Yazheng¹,Liu Zhao³,Qiao Aiyun²,Li Xiao²，Jing Yinong²

1 School of Materials Science and Engineering,University of Science and Technology,Beijing 100083;
2 Seamless Steel Tube Plant,Baotou Iron and Steel(Group)Co Ltd,Baotou 014040;
3 Department of Machinery and Electricity,Hebei University of Engineering,Handan 056038

Received:2006-05-30 Online:2006-11-01 Published:2023-03-02

热轧冷却速率对微合金非调质钢34Mn2VN组织的影响

张玉胜^1,2，刘雅政¹，刘照³ ，乔爱云²，李晓 ²，井溢农²

1 北京科技大学材料学院，北京100083;
2包钢集团公司无缝钢管厂，包头014040;
3河北工程大学机电学院，邯郸056038

通讯作者: 刘雅政
作者简介:张玉胜(1968-),男，高级工程师，硕士研究生，1992年东北大学毕业，从事冶金材料研究。

Abstract

Abstract: Dynamic continuous cooling transformation(CCT)curves and structure transition of non quenched-tempered steel 34Mn2VN(0.30~0.34C,1.20～1.70Mn,0.014～0.018N,0.07～0. 12V)at 950℃ with average strain rate 2 s-¹and 15% strain, then cooling with 0.1～45 ℃/s different rate have been studied by Cleeble-1500 thermal simulation machine. The results obtained that as cooling rate was controlled within 0.8~2.0 ℃/s,the fine ferrite and minor bainite structure was obtained, it had higher impact toughness. Commercial production application showed that the impact energy of φ139.7×7.7(mm) and φ114.0×6.4(mm) steel tubes produced with that cooling rate was 47.8～50.9 J.

Key words: Non , Quenched-Tempered , Steel , 34Mn2VN,Dynamic , CCT , Curves,Structure,Impact , Toughness

摘要： 用Gleeble-1500热模拟试验机研究了非调质钢34Mn2VN(%:0.30～0.34C、1.20～1.70Mn、0.014～0.018N、0.07～0.12V)在950℃、平均应变速率2s^-1、应变15%后以0.1～45℃/s不同冷却速率下冷却的动态CCT曲线和组织转变。结果得出,当冷却速率控制在0.8～2.0℃/s时所得到细小的铁素体和少量贝氏体组织,具有较高的冲击韧性。生产应用表明,采用该冷却速率生产Φ139.7×7.7(mm)和Φ114.0×6.4(mm)管材的冲击功为47.8～50.9J。

关键词: 非调质钢34Mn2VN, , 动态CCT 曲线, 组织, 冲击韧性

Zhang Yusheng, Liu Yazheng, Liu Zhao, Qiao Aiyun, Li Xiao, Jing Yinong. Effect of Finished Rolling Cooling Rate on Structure of Microalloy Non Quenched-Tempered Steel 34Mn2VN[J]. Special Steel, 2006, 27(6): 24-26.

张玉胜, 刘雅政, 刘照, 乔爱云, 李晓, 井溢农. 热轧冷却速率对微合金非调质钢34Mn2VN组织的影响[J]. 特殊钢, 2006, 27(6): 24-26.

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Effect of Finished Rolling Cooling Rate on Structure of Microalloy Non Quenched-Tempered Steel 34Mn2VN

热轧冷却速率对微合金非调质钢34Mn2VN组织的影响

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