Austenite to polygonal-ferrite transformation and carbide precipitation in high strength low alloy steel

被引：1

作者：

Zhou, Xiaosheng ^{[1
]}

Dong, Ji ^{[1
]}

Liu, Yongchang ^{[1
]}

Liu, Chenxi ^{[1
]}

Yu, Liming ^{[1
]}

Huang, Yuan ^{[1
]}

Li, Huijun ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH | 2017年 / 108卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Polygonal ferrite; Cooling rate; Carbide; High strength low alloy steel; CONTINUOUS COOLING TRANSFORMATION; ACICULAR FERRITE; GRAIN-SIZE; LOW-CARBON; MECHANICAL-PROPERTIES; MICROALLOYED STEEL; PIPELINE STEEL; C ALLOY; MICROSTRUCTURE; TOUGHNESS;

D O I：

10.3139/146.111454

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

By differential scanning calorimetry measurement and microstructural examination, the effects of cooling rates on the kinetics and microstructure of polygonal ferrite transformation have been investigated in a high strength low alloy steel. The peak temperature of ferrite transformation exhibits an evident dependency on cooling rate. With the cooling rate decreasing, the ferrite fraction corresponding to the maximum transformation rate is decreased, as well as the size of polygonal ferrite grains. More ferrite is nucleated at lower cooling rate. On the basis of the effects of austenite grain size and carbide precipitation on ferrite formation, it is suggested that carbide precipitation plays a more dominant role in the kinetics of ferrite transformation. During austenite-ferrite transformation, the ferrite nucleation still proceeds, and the nucleation would not be saturated by pre-existing nuclei.

引用

页码：12 / 19

页数：8

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