东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (2): 181-184.DOI: -

• 论著 • 上一篇    下一篇

V和V-N微合金化低碳钢碳氮化物的形变析出

王立军;王凯;任海鹏;刘春明;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-02-15 发布日期:2013-06-23
  • 通讯作者: Wang, L.-J.
  • 作者简介:-
  • 基金资助:
    中国金属学会-国际钒技术委员会资助项目;;

Precipitation behavior and effects of vanadium carbonitride in V and V-N microalloyed mild steel during multi-pass deformation

Wang, Li-Jun (1); Wang, Kai (1); Ren, Hai-Peng (1); Liu, Chun-Ming (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-02-15 Published:2013-06-23
  • Contact: Wang, L.-J.
  • About author:-
  • Supported by:
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摘要： 通过热模拟压缩实验考察了V和V-N微合金化低碳锰钢在860~740℃范围内多道次变形时的组织演变和碳氮化物析出规律及其相互影响.结果表明,含V钢中添加少量的N促进了变形奥氏体中V的碳氮化物(尤其是氮化物)的析出和形变诱导铁素体相变.V的碳氮化物析出降低了奥氏体中固溶的V,从而减弱了固溶V对形变诱导铁素体相变的抑制作用.碳氮化物析出在奥氏体的局部区域造成贫碳区,也促进了铁素体形核.在相同处理工艺下与V钢相比,V-N钢中铁素体内碳氮化物开始析出的时间短,析出相的数量多,长大速度慢,分布弥散.

关键词: V微合金化钢, V-N微合金化钢, 碳氮化物, 形变诱导铁素体相变

Abstract: The microstructure evolution and precipitation behavior of vanadium carbonitride were examined using a Gleeble 1500 thermal simulator, as well as their mutual effect in V and V-N microalloyed mild steel (0.1%C-1.0%Mn) during multi-pass deformation at 860-740°C. The result showed that adding a small amount of N to V microalloyed steel will expedite the precipitation of V(C, N), especially V-N in deformed austenite, and the deformation induced ferrite transformation (DIFT). But the concentration of V dissolved in austenite decreases because of the precipitation of V(C, N), thus weakening the effect of V on suppressing DIFT so as to expedite the ferrite nucleation. Moreover, the precipitation of V(C, N) causes locally the formation of carbon-poor region in austenite, thus expediting the ferrite nucleation further. Comparing with the V microalloyed steel under the same treatment conditions, the precipitation of V(C, N) within ferrites in V-N microalloyed steel requires shorter inoculation time with higher V(C, N) volume fraction, lower growth rate and wider dispersion.

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