pdf optimization of nb hsla microstructure using

Effect of Controlled Cooling on Microstructure and

advanced multiphase HSLA plate steel need further investigation in detail. As such, in this attempt, the simulations on TMCP of low-carbon Nb-Ti containing HSLA steel with different controlled cooling rates were performed. The effect of controlled cooling on the microstructure and tensile properties of all the samples was evaluated. 2. Effect of Controlled Cooling on Microstructure and Tensile The thermo-mechanical control processing (TMCP) of low carbon (C) Nb-Ti-containing HSLA steel with different cooling rates from 5 to 20 °C/s was simulated using a Gleeble 3500 system. The samples microstructure was characterized and the tensile properties measured.

Effect of Niobium on HAZ Toughness of HSLA Steels

Figures 3a ~ 3c show the optical microstructure of steels KT2, KT5 and KT8. A ll of them have the same Nb content (0.015%) and different carbon content 0.05,0.1,0.15% respectively. The effect of the increase in Carbon content shows similar effect as the increase in Nb content for steels KT4~KT6 which have medium carbon content. As the Effect of V and N on the microstructure evolution during Nb (wt %) N (ppm) aim max LCAK 0.045 0.22 - - - 50 LR-HSLA 0.045 0.8 0.04 0.013 80 100 HSLA 0.045 0.8 0.13 0.013 130 150 Therefore the question is:why are the LCAK and the LRHSLA sensitive to crackin- g and the HSLA is not. In this paper we will focus on the differences between LCAK and HSLA. 2. Short literature review Effects of Nb on the Microstructure and Mechanical Apr 13, 2011 · Abstract. In order to reduce the alloying cost, Mn-series low carbon water-quenched grain boundary allotriomorphic ferrite (F GBA)/granular bainite (B G) steels have been developed.The effect of 0.06 wt.% Nb on microstructure and mechanical properties of F GBA /B G steel was investigated. The result showed that the addition of 0.06 wt.% Nb improved the hardenability of the F GBA /B G steel

Formability of HSLA and EDDQ steels of tube products of

The HSLA steel sheet of thickness 1.6 mm and EDDQ steel of thickness 1.2 mm have been used. Experiment Procedure Chemical composition and tensile test The chemical compositions of the sheet metals studied were found out by spectrometry and presented in Table 1. The microstructure of HSLA and EDDQ steels considered for the study were obtained by Improved SCC Resistance of HSLA Steel in a Simulated Deep Feb 04, 2021 · The results show that the addition of Nb significantly decrease the SCC susceptibility of HSLA steel in a simulated deepsea environment, and the role of Nb could be attributed to the microstructure optimization and the strong hydrogentrap function of nanosized NbC precipitates with hydrogen activation energies up to 100.5 kJ/mol. Microstructure Evolution during Accelerated Cooling Mar 02, 2021 · An Nb-Ti low carbon HSLA steel with the application of Coiled Tubing steel in petroleum industry, was subjected to hot rolling followed by the subsequent cooling procedures including cooling and coiling. The effect of cooling rate and coiling temperature on final microstructure and texture was investigated via optical microscopy, SEM, and EBSD analyses. It was found that rolling at 800 °C

Microstructure Evolution of HSLA Pipeline Steels after

Chemical composition of the tested HSLA pipeline steel (wt. %). C Si Mn Ni Cr Mo Cu Al V Nb Ti 0.09 0.29 1.29 0.15 0.06 0.18 0.13 0.034 0.05 0.03 0.001 The simulation rolling experiments were performed on a Gleeble 1500 system (DSI, New York, NY, USA) equipped with a dilatometer. The simulation procedures are illustrated in Figure1. All simulation Modeling Macro-and Microstructures of Gas-Metal-Arc Welded HSLA-100 Steel Z. YANG and T. DEBROY Fluid flow and heat transfer during gas-metal-arc welding (GMAW) of HSLA-100 steel were studied using a transient, three-dimensional, turbulent heat transfer and fluid flow model. The temperature and velocity fields, cooling rates, and shape and size of the fusion and heat-affected zones (HAZs) were Preface THERMEC 2006 Scientific.NetOptimization of Nb HSLA Microstructure Using Advanced Thermomechanical Processing in a CSP Plant p.28 Development of New Actuators for Flapping Wing Flight

(PDF) Optimization of Nb HSLA Microstructure Using

API X-70 properties can readily be obtained by NUCOR using Nb HSLA steels and CSP processing in gauges up to 12.5mm(0.5 in.) and widths to 1575mm(62 in.), resulting in ERW pipe diameters of 500mm(20 in. Fig. 11Block diagram of different steelmaking routes up to the caster in TSC production micrograph of a) star-like particles and b) lines of