Recent Innovations in Alloy Design and Processing of Microalloyed Steels
Abstract:
The present review describes some of the principal developments with regard to alloy chemistry and processing technology of microalloyed steels which have been made within the past ten years. The progress during this period has been coloured by advances in steel production - improved control over residuals, continuous casting, rapid cooling technology etc., as well as by more stringent specifications and user demands - enhanced weldability, formability and machinability, more cost effective alloying, minimization of heat treatment and so on. Concerning alloy design, attention is focussed on the following: microalloying with Ti, boron in ultra low-carbon (bainitic) steels and in heat-treatable steels, vanadium-nitrogen grades, and various developments of engineering steels (e.g. microalloying for hardenability in QT-steels, ferrite-pearlite forging grades, coldfinished bars etc). As regards the developments in processing technology for microalloyed steels, consideration is given to controlled cooling of plate, recrystallization hot rolling, direct quenching and controlled cooling in association with forging for elimination of subsequent heat treatment, and to the application of thermo-mechanical treatment in the production of bars and profiles.
Keywords:
vanadium, microalloyed steel.
Author:
W. Roberts
Affiiation
lnstltutet ffir Metalltorskning, S-114 28 Stockholm, Sweden.
PDF:
Source:
Vanadium Structural Steels - Reprint of papers on vanadium steel from the proceedings of “ASM HSLA Steels Technology and Applications Conference, Philadelphia, USA, Oct., 1983, pp.1-33
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