Journal ArticleDOI
Effect of prior-austenite grain size and transformation temperature on nodule size of microalloyed hypereutectoid steels
Reads0
Chats0
TLDR
In this paper, the effect of prior-austenite grain size and transformation temperature on nodule size and colony size of hypereutectoid steels containing 1 pct carbon with different levels of vanadium and silicon was investigated.Abstract:
The effect of prior-austenite grain size and transformation temperature on nodule size and colony size of hypereutectoid steels containing 1 pct carbon with different levels of vanadium and silicon was investigated. Specimens of the various steels were thermally processed at various temperatures ranging from 900 °C to 1200 °C and transferred to salt bath conditions at 550 °C, 580 °C, and 620 °C to examine the structural evolution of pearlite. The heat-treatment work showed that for only the hypereutectoid steel without vanadium there was a continuous grain boundary cementite network, the thickness of which increased with increasing reheat temperature. Analysis of the thermally processed hypereutectoid steels also indicated that the prior-austenite grain size and transformation temperature controlled the nodule size, while the colony size was dependent on the latter only.read more
Citations
More filters
Journal ArticleDOI
Dissolution and precipitation behaviour in steels microalloyed with niobium during thermomechanical processing
TL;DR: In this article, the thermomechanical processing of high strength low allow (HSLA) steels during low-temperature roughing, followed by rapid reheating to higher temperatures was investigated to better understand the Nb dissolution kinetics in austenite, and the subsequent precipitation behavior during the final finishing passes.
Journal ArticleDOI
Thermomechanical processing route to achieve ultrafine grains in low carbon microalloyed steels
TL;DR: In this paper, a new thermomechanical processing route is described for a microalloyed steel, with roughing deformation below the recrystallisation-stop temperature (T5), followed by a rapid reheat to 1200°C for 10s, and then finish deformation at the same temperature as the rough deformation.
Journal ArticleDOI
Effect of vanadium on the high-cycle fatigue fracture properties of medium-carbon microalloyed steel for fracture splitting connecting rod
TL;DR: In this article, the effect of V up to 0.45% on the high-cycle fatigue properties of medium-carbon microalloyed (MA) steel 37MnSiVS, for the development of new crackable MA forging steel with excellent fatigue properties was investigated.
Journal ArticleDOI
Development of high strength ductile hypereutectoid steel by cyclic heat treatment process
TL;DR: In this article, a homogenizing annealed 1.24-wt% carbon steel was subjected to cyclic heat treatment process that consisted of repeated short-duration (6min) holding at 894°C (above Acm temperature) followed by forced air cooling.
Journal ArticleDOI
Microstructure of Hot Rolled 1.0C-1.5Cr Bearing Steel and Subsequent Spheroidization Annealing
TL;DR: In this paper, the effect of final rolling temperature and cooling process on the microstructure of 1.0C-1.5Cr bearing steel was studied, and the relationship between the micro-structure parameters and subsequent spheroidization annealing was analyzed.
References
More filters
Book
Steels, Microstructure and Properties
TL;DR: In this article, the authors studied the effects of alloying elements in iron-carbon alloys and the formation of martensite, bainite reaction and acicular ferrite reaction.
Journal ArticleDOI
The effect of morphology on the strength of pearlite
A. R. Marder,B. L. Bramfitt +1 more
TL;DR: In this paper, the effects of various morphological features on the strength of high-purity pearlite were studied, and a continuous cooling mode of transformation from different austenitizing temperatures was used to produce variations in average nodule diameter and minimum interlamellar spacing.
Journal ArticleDOI
Thermodynamics of the fcc Fe-Mn-C and Fe-Si-C alloys
TL;DR: The activity of carbon in austenitic Fe-Mn-C and Fe-Si-C alloys has been studied by equilibration with controlled CH4-H2 atmospheres at temperatures in the range 848° to 1147°C and for composition up to about 60 pct Mn and 7 pct Si.
Journal ArticleDOI
Strengthening mechanisms in vanadium microalloyed steels intended for long products
TL;DR: In this paper, the role of vanadium, nitrogen and carbon in controlling the microstructures and strength of steels designed for hot rolled long products was investigated, and it was confirmed that nitrogen is a very reliable alloying element, increasing the yield strength of V-microalloyed steels by some 5 MPa for every 0.001% N, essentially independent of processing conditions.
Journal ArticleDOI
Dynamic recrystallization of austenite in microalloyed high carbon steels
TL;DR: In this paper, the authors used the Zener-Hollomon relationship to predict the critical strain for dynamic recrystallization of 1% carbon, alloyed with high silicon and microalloying levels of vanadium.