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金属学报  1993, Vol. 29 Issue (10): 17-22    
  论文 本期目录 | 过刊浏览 |
200Cr12钢下贝氏体碳化物来源及形成机制
方鸿生;王家军;郑燕康;杨志刚
清华大学;清华大学;清华大学;清华大学
ORIGIN AND FORMATION OF LOWER BAINITIC CARBIDE IN STEEL 200Cr12
FANG Hongsheng;WANG Jiajun;ZHENG Yankang;YANG Zhigang Tsinghua University; Beijing
引用本文:

方鸿生;王家军;郑燕康;杨志刚. 200Cr12钢下贝氏体碳化物来源及形成机制[J]. 金属学报, 1993, 29(10): 17-22.
, , , . ORIGIN AND FORMATION OF LOWER BAINITIC CARBIDE IN STEEL 200Cr12[J]. Acta Metall Sin, 1993, 29(10): 17-22.

全文: PDF(1847 KB)  
摘要: 通过本文实验用钢的研究,证明了下贝氏体碳化物的来源用透射电镜(TEM)证实下贝氏体碳化物在下贝氏体铁素体宽面上巨型台阶前沿析出,且呈楔状形态,楔根(较粗的一端)源于巨型台阶前沿、楔尖指向奥氏体基体内部;随着离α/γ界面距离的增加,楔状碳化物截面逐渐变细,最后演变为楔尖状实验表明:下贝氏体碳化物优先在α/γ界面上巨型台阶阶面前沿形核,或在界面附近奥氏体侧形核,也可在贝氏体铁素体亚片条间奥氏体内形核,然后向相邻奥氏体基体一侧长大本文在实验基础上提出下贝氏体碳化物的形核长大模型
关键词 下贝氏体碳化物巨型台阶台阶机制200Cr12钢    
Abstract:Lower bainitic carbides in a steel 200Cr12 have been observed under TEM toprecipitate in front of superledges on the broad faces of lower bainitic ferrite plates, and to bewedge-shaped. The root of a wedge-shaped carbide originates at the junction of the riser andterrace of a superledge while the tip penetrates the austenite matrix. A lower bainitic carbidenucleates in front of the riser or in the γ matrix near the α/γ boundary, and also in theaustenite between two bainitic ferrite subplates. But wherever it nucleates, the carbide willgrow only towards the remained austenite. The nucleation and growth model of lower bainiticcarbides is proposed.
Key wordslower baintic carbide    superledge    ledge-wise mechanism steel 200Cr12
收稿日期: 1993-10-18     
基金资助:国家自然科学基金
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