ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (2): 55-57.

• 组织和性能 • 上一篇    下一篇

0.33C-1.0Mn-0.8Si钢过冷奥氏体的连续冷却转变及组织细化

冯运莉,杨晓彩,张宁宁   

  1. 河北理工大学金属材料工程系,唐山 063009
  • 收稿日期:2008-09-08 出版日期:2009-04-01 发布日期:2022-12-05
  • 作者简介:冯运莉(1965-),女,工学博土,教授,钢铁材料组织和轧制工艺:
  • 基金资助:
    “河北省自然科学基金”资助项目(E2006000358)

Continuous Cooling Transformation of Overcooling Austenite and Structure Fining of 0.33C-1.0Mn-0.8Si Steel

Feng Yunli , Yang Xiaocai , Zhang Ningning   

  1. Metal Material Engineering Department,Hebei Polytechnic University,Tangshan 063009
  • Received:2008-09-08 Published:2009-04-01 Online:2022-12-05

摘要: 利用Gleeble-3500热模拟实验机测定了0.33C-1.0Mn-0.8Si钢的静态(不变形)与动态(变形)CCT (连续冷却转变)曲线,并观察了钢的组织。结果可见,形变可以提高铁素体转变的开始温度,但对转变终了温度基本没有影响,变形后过冷奥氏体的铁素体转变区扩大,动态Ar3的值比相同冷却条件下静态时Ar3高出近100℃,形变对Ar1的影响不明显;随着冷却速度的增大,铁素体晶粒由多边形状变成条状或长片状,珠光体团也变得更细小、弥散,且动态连续冷却组织比静态连续冷却组织细小。

关键词: 0.33C-1.0Mn-0.8Si钢, CCT曲线, 相变, 组织, 细化

Abstract: Static (non-deformation) and dynamic (deformation) continuous cooling transformation (CCT) curves of steel0.33C-1.0Mn-0.8Si was measured by Gleeble-3500 thermo-mechanical simulator,and structure of steel was observed. Results showed that the deformation of overcooling austenite could increase initial transformation temperature of ferrite,but had no obvious influence on temperature of completion of transformation,the zone of ferrite transformation of deformed overcooling austenite enlarged,and Ar3 value for deformed austenite was higher by 100 ℃ than that for non-deformed austenite while effect of deformation on Ar1 was no-obvious; and with increasing cooling rate,the morphology of fer- rite grain changed from polygonal to lath and long leaf structure and the pearlite colonies became more fine and dispersed, and the continuous cooling structure for deformed austenite was finer than that for non-deformed austenite.

Key words: 0.33C-1.0Mn-0.8Si Steel, CCT Curves,Phase Transformation, Structure, Refinement