Investigation on Precipitation transition in CGHAZ for TRIP Steels Containing Vanadium and Titanium
Two kinds of low-carbon low-silicon TRIP (Transformation Induced Plasticity) steels containing vanadium are designed using ThermoCalc software in the light of both thermodynamics and kinetics. TRIP heat treatment process of different steels is determined according to the calculation results respectively. Weld HAZ (Heat-Affected Zone) simulation tests indicate the weldability of TRIP steels is crucially sensitive to CE (carban equivelent) of the steel. However the impact toughness of CGHAZ (Coarse Grain Heat-Affected Zone) does not decrease drastically for TRIP steels microalloyed with Ti+V. The steel containing both of vanadium and titanium shows smaller grain size compared with that containing vanadium solely. This is because the precipitation of Ti/V carbonitride slows down the grain boundary motion speed and then retards the grain size coalescence in CGHAZ.
TRIP steel Precipitation transition Heat-affected Zone CGHAZ simulation
ZHANG Mei FU Ren-Yu B.C. De Cooman Li Lin
Dept. Mat. Sci. & Eng., Shanghai University, 149 Yanchang Road, 200072 Shanghai, China Graduate Institute for Ferrous Technology, Pohang University of Science and Technology, Pohang, Sout
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
915-918
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）