Effect of Austenitizing Temperature on Pearlite Transformation of a Medium-Carbon Steel

被引：1
|
作者：
Wu, G. H. [1 ]
Wu, K. M. [1 ]
Isayev, O. [1 ]
Hress, O. [1 ]
Yershov, S. [1 ]
Tsepelev, V [2 ]
机构：
[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Int Res Inst Steel Technol, Wuhan, Hubei, Peoples R China
[2] Ural Fed Univ, Ctr Liquid Met Phys, Ekaterinburg, Russia
来源：
METALLURGIST | 2019年 / 62卷 / 9-10期
关键词：
steel; phase transformation; pearlite; bainite; microstructure; Q-AND-P;
D O I：
10.1007/s11015-019-00756-4
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Pearlite transformation is a necessary step in the production of ultra-high strength wires and nanostructured bainitic steels. The initial austenite grain size has an important influence on the bainite and pearlite transformation. The effect of austenitizing temperature on the austenite-to-pearlite transformation in a medium-carbon steel was investigated by using a Gleeble 1500 simulator. The initial austenite grains coarsened from 33.7 to 68.5 m when the austenitizing temperature increased from 850 degrees C to 1100 degrees C. The phase-volume percentage and interlamellar spacing of the pearlitic microstructure decreased from 86.6% to 5.2%, and from 114 nm to 110 nm, respectively, in the same austenitizing temperature range. The starting temperature of the pearlite transformation was inversely proportional to the austenitizing temperature. The pearlite-transformation temperature range (43-48 degrees C) did not change visibly with austenitizing temperature. The Vickers hardness of the transformed microstructure (pearlite + martensite) was proportional to the austenitizing temperature.
引用
收藏
页码：1073 / 1080
页数：8
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