Effect of microalloying on aging of a Cu-bearing HSLA-100 (GPT) steel

被引：8
|
作者：
Panwar, Sanjay
Goel, D. B. [1 ]
Pandey, O. P.
Prasad, K. Satya
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Roorkee 246667, Uttar Pradesh, India
[2] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India
[3] Thapar Inst Engn & Technol, Sch Phys & Mat Sci, Patiala 147004, Punjab, India
来源：
BULLETIN OF MATERIALS SCIENCE | 2006年 / 29卷 / 03期
关键词：
HSLA steel; microalloying; strain-induced aging; Cu-bearing steel;
D O I：
10.1007/BF02706498
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Investigations were carried out on aging of a IISLA-100 steel containing Cu as the major alloying element and Nb, Ti and V as microalloying elements. The aging process after varying amounts of cold deformation was followed by hardness measurements and microstructural changes were studied using light and electron microscopy. Presence of Ti activates the formation of (Nb, Ti)C precipitates and completely suppresses the precipitation of Cu. Even a solution treatment at 1100 degrees C is not sufficient to-completely dissolve,Nb and Ti in the matrix and undissolved (Nb, Ti)C precipitates were observed in oil quenched state. Strain induced aging at 400 degrees C causes simultaneous coarsening of existing precipitates and nucleation of fresh carbides, which results in multi-stage hardening in this steel. Strong precipitate-dislocation interactions cause retardation in recrystallization of deformation structure leading to retention of high hardness levels even on prolonged aging.
引用
收藏
页码：281 / 292
页数：12
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