燕山大学学报Issue(3)：196-200,205,6.DOI:10.3969/j.issn.1007-791X.2013.03.002
高 Nb 微合金钢连续冷却转变行为的研究
Continue cooling transformation behaviors of high-Nb microalloyed steel
摘要
Abstract
The effects of hot deformation and relaxation process on the continue cooling transformation (CCT) diagrams of a high-Nb microalloyed steel are determined by the means of the thermal simulation on a Gleeble-3500 thermal mechanical simula-tor. The results show that the hot deformation shifts the CCT curves to up and left, promoting the phase transformation with the refinement of the microstructure. The recovery and recrystallization involved in the relaxation process after hot deformation de-creases the deformation energy and, consequently, the refinement effect of the deformaton decreases, leading to coarse micro-structures at room temperature. Moreover, the amount of dissovled Nb and C in austenite decreases due to the precipitation of Nb, which weakens the restraining effect of Nb and C on phase transforntion and results the increase of the phase transformation tem-perature.关键词
Nb 微合金钢/CCT 曲线/变形/弛豫Key words
Nb microalloyed steel/CCT diagram/deformation/relaxation分类
矿业与冶金引用本文复制引用
曹雅彬,肖福仁,乔桂英,廖波..高 Nb 微合金钢连续冷却转变行为的研究[J].燕山大学学报,2013,(3):196-200,205,6.基金项目
国家自然科学基金资助项目（51171162）；河北省自然科学基金资助项目 （）
