D0I:10.13374/i.issnl00It03.2008.03.013 第30卷第3期 北京科技大学学报 Vol.30 No.3 2008年3月 Journal of University of Science and Technology Beijing Mar.2008 C和N含量对V微合金非调质钢静态再结晶量的 影响 辛彬楠) 刘国权2王安东) 1)北京科技大学材料科学与工程学院，北京1000832)北京科技大学新金属材料国家重点实验室，北京100083 摘要使用Gleeble-1500热/力模拟机，对四种V-N微合金非调质钢和一种非V一N微合金化对比钢进行了静态再结晶实 验研究.研究结果表明：当钢中C质量分数为0.33%时，V一N微合金钢的静态再结晶要比未V一N微合金化的对比钢有明显 滞后，尤以820~880℃温度范围内最为明显，因此钢中V析出物对道次间再结晶过程影响很大.进一步研究表明，V一N微合 金非调质钢道次间静态再结晶量受C含量的影响并不呈简单线性关系：在760~880℃温度范围内，道次间静态再结晶量在钢 中C质量分数为0.33%时均为极大值，而940℃下所有五种实验钢均完成了静态再结晶：钢中V析出物对道次间静态再结晶 的影响机制相当复杂，与其析出时机关系很大·在此C含量下且V和Ti量均近似相同的V一N微合金实验钢中，发现当N质 量分数从140×10-6增加到210×10-6时，该温度范围内道次间静态再结晶量下降14%~19%，N含量增加有明显抑制道次 间静态再结晶的作用， 关键词微合金非调质钢：热模拟：静态再结晶：析出 分类号TG111.7 Effect of C and N on static recrystallization in vanadium microalloyed non- quenched/tempered steels XIN Binnan),LIU Guoquan).WANG Andong 1)School of Materials Science and Engineering.University of Science and Technology Beijing.Beijing 100083,China 2)State Key Laboratory for Advanced Metals and Materials.University of Science and Technology Beijing.Beijing 100083.China ABSTRACT The Gleeble-1500 thermal/mechanical simulator was used to study static recrystallization in four non-quenched/tem- pered steels with V-N-microalloying and one non"microalloying base steel.The results show that in the V-N microalloyed steel with 0.33%C.the static recrystallization process was retarded markedly in comparison with that in the non-microalloying steel with the same C content.especially in the range of 820 to 880C.However,the relationship between C content and static recrystallization was not linear for the microalloyed steels studied.Compared that for the steels with lower or higher C contents.the inter pass static re- crystallization amounts in the 0.33%C steel were always the maximum within the temperature range of 760 to 880C.though all the five tested steels completed static recrystallization under 940C.Such results indicated that the effect of V-containing precipitates on the inter pass static recrystallization process was fairly complex and depended on when the precipitation occurs.When the mass frac- tion of N increased from 140X10-to 210X10-and the other compositions were almost the same,the inter"pass static recrystalliza- tion amount decreased by 14%to 19%in the temperature range of 820 to 860C.showing that the increase of N content would re- strain static recrystallization obviously. KEY WORDS microalloying non-quenched/tempered steel:thermo-mechanical simulation:static recrystallization:precipitation 控轧控冷是一种能够同时影响钢的塑性、韧性 和强度的材料加工方法，通过控轧控冷，可以控制 奥氏体的形变与再结晶，有效细化金相组织，控制碳 收稿日期：2006-12-07修回日期：2007-10-31 氮化物沉淀析出行为，使钢材的综合力学性能提高， 基金项目：国家自然科学基金资助项目(N。,50671010:N。 因而获得广泛应用山. 50271009):国际钒技术委员会(VANITEC)资助项目 作者简介：辛彬楠(1980一)，男，硕士研究生：刘国权(1952一)男， 钢材的控轧控冷技术是基于对热变形后的奥氏 教授，博士生导师 体相转变进行控制，从而在钢的轧后冷却过程中得C 和 N 含量对 V 微合金非调质钢静态再结晶量的 影响 辛彬楠1） 刘国权1‚2 王安东1） 1） 北京科技大学材料科学与工程学院‚北京100083 2） 北京科技大学新金属材料国家重点实验室‚北京100083 摘 要 使用 Gleeble-1500热／力模拟机‚对四种 V－N 微合金非调质钢和一种非 V－N 微合金化对比钢进行了静态再结晶实 验研究．研究结果表明：当钢中 C 质量分数为0∙33％时‚V－N 微合金钢的静态再结晶要比未 V－N 微合金化的对比钢有明显 滞后‚尤以820～880℃温度范围内最为明显‚因此钢中 V 析出物对道次间再结晶过程影响很大．进一步研究表明‚V－N 微合 金非调质钢道次间静态再结晶量受 C 含量的影响并不呈简单线性关系：在760～880℃温度范围内‚道次间静态再结晶量在钢 中 C 质量分数为0∙33％时均为极大值‚而940℃下所有五种实验钢均完成了静态再结晶；钢中 V 析出物对道次间静态再结晶 的影响机制相当复杂‚与其析出时机关系很大．在此 C 含量下且 V 和 Ti 量均近似相同的 V－N 微合金实验钢中‚发现当 N 质 量分数从140×10－6增加到210×10－6时‚该温度范围内道次间静态再结晶量下降14％～19％‚N 含量增加有明显抑制道次 间静态再结晶的作用． 关键词 微合金非调质钢；热模拟；静态再结晶；析出 分类号 TG111∙7 Effect of C and N on static recrystallization in vanadium microalloyed non￾quenched／tempered steels XIN Binnan 1）‚LIU Guoquan 1‚2）‚W A NG A ndong 1） 1） School of Materials Science and Engineering‚University of Science and Technology Beijing‚Beijing100083‚China 2） State Key Laboratory for Advanced Metals and Materials‚University of Science and Technology Beijing‚Beijing100083‚China ABSTRACT T he Gleeble-1500thermal／mechanical simulator was used to study static recrystallization in four non-quenched／tem￾pered steels with V-N-microalloying and one non-microalloying base steel．T he results show that in the V-N microalloyed steel with 0∙33％ C‚the static recrystallization process was retarded markedly in comparison with that in the non-microalloying steel with the same C content‚especially in the range of820to880℃．However‚the relationship between C content and static recrystallization was not linear for the microalloyed steels studied．Compared that for the steels with lower or higher C contents‚the inter-pass static re￾crystallization amounts in the0∙33％ C steel were always the maximum within the temperature range of760to880℃‚though all the five tested steels completed static recrystallization under940℃．Such results indicated that the effect of V-containing precipitates on the inter-pass static recrystallization process was fairly complex and depended on when the precipitation occurs．When the mass frac￾tion of N increased from140×10－6to210×10－6and the other compositions were almost the same‚the inter-pass static recrystalliza￾tion amount decreased by 14％ to19％ in the temperature range of 820to860℃‚showing that the increase of N content would re￾strain static recrystallization obviously． KEY WORDS microalloying non-quenched／tempered steel；thermo-mechanical simulation；static recrystallization；precipitation 收稿日期：2006-12-07 修回日期：2007-10-31 基金项 目：国 家 自 然 科 学 基 金 资 助 项 目 （ No．50671010；No． 50271009）；国际钒技术委员会（VANITEC）资助项目 作者简介：辛彬楠（1980－）‚男‚硕士研究生；刘国权（1952－）‚男‚ 教授‚博士生导师 控轧控冷是一种能够同时影响钢的塑性、韧性 和强度的材料加工方法．通过控轧控冷‚可以控制 奥氏体的形变与再结晶‚有效细化金相组织‚控制碳 氮化物沉淀析出行为‚使钢材的综合力学性能提高‚ 因而获得广泛应用［1］． 钢材的控轧控冷技术是基于对热变形后的奥氏 体相转变进行控制‚从而在钢的轧后冷却过程中得 第30卷 第3期 2008年 3月 北 京 科 技 大 学 学 报 Journal of University of Science and Technology Beijing Vol．30No．3 Mar．2008 DOI:10．13374／j．issn1001－053x．2008．03．013