Study on High Tensile Heavy Plate with V-N Microalloying Technology
The contrast experiment of rolling heavy plate in Shougang is carried out between V-N microalloyed and V microalloyed steel. It is confirmed that not only the strengthening effect of V element is improved, but also the ferrite grain size becomes smaller with the increase of nitrogen content in the V-contained steel. The results have demonstrated that it has no disadvange to the performances of the steel. The heavy plates, 60 mm and 70 mm thickness, are manufactured with V−N microalloying combined with controlled rolling replacing the heat treatment processes. The performances of plate meet the requirements of Q390E steel.
V-N; microalloying; heavy plate; controlled rolling.
X. Yang，Y. Jin，Q. Wang and G. Zhang
Shougang Research Institute of Technology
Application Technologies of Vanadium in Flat-rolled Steels –Vanitec Symposium, Suzhou, China, Oct. 2005, pp.64-68