Showing papers on "Microalloyed steel published in 1980"
TL;DR: In this article, a C-Mn steel and two micro-alloyed steels were subjected to controlled hot rolling followed by cooling in air or vermiculite to allow differentiation between cases in which transformation started after the end of rolling and those in which it started in the roll gap during deformation.
Abstract: A C–Mn steel and two microalloyed steels, one containing niobium and the other vanadium, were subjected to controlled hot rolling followed by cooling in air or vermiculite. The experiments were designed to allow differentiation between cases in which transformation started after the end of rolling and those in which it started in the roll gap during deformation. When transformation began after the end of rolling, austenite grains of the C–Mn steel were refined by recrystallization, while in the microalloyed steels austenite grains were elongated due to the absence of recrystallization. In all three steels ferrite grain refinement originated wholly from changes in size or shape of austenite grains and constancy of the ratio of austenite to ferrite grain sizes. Significant change in the transformation mechanism need not be invoked in order to explain the observed degrees of ferrite grain refinement. On the other hand, when transformation began during rolling, more efficient grain refinement was obta...
25 citations
01 Jan 1980
TL;DR: In this article, the authors reviewed metallurgical, welding procedural and other factors which control the toughness of heat affected zones (HAZs) and weld metals and dealt with C-Mn and C-mn microalloyed steel weldments in the as-welded condition.
Abstract: Recent information on metallurgical, welding procedural and other factors which control the toughness of heat affected zones (HAZs) and weld metals is reviewed. The paper deals with C-Mn and C-Mn microalloyed steel weldments in the as-welded condition.
7 citations