Intercritical Treatment
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Intercritical Heat Treatment Temperature Dependence of Mechanical Properties and Corrosion Resistance of Dual Phase Steel
Abstract This study investigated the effect of intercritical heat treatment temperature on the tensile properties, work hardening and corrosion resistance of dual phase steel. Ferrite-martensite dual phase steel with different martensite volume fractions were obtained after heat treatment at different intercritical temperatures. Microstructure, mechanical pr
Mat. Res.. Publicado em: 17/01/2019
-
2. Estabilidad de la austenita retenida bajo condiciones de deformación en aceros multifásicos con bainita nanoestructurada
ABSTRACT A steel with nominal composition 0.25C, 1.9Si, 0.63Mn, 1.5Cr was manufactured using an induction furnace. The as-cast alloy was homogenized and the temperatures of austenite start (AC1) and finish (AC3) during heating were determined by dilatometric analyses. Two intercritical austenitization temperatures were selected, which were used to perform pa
Matéria (Rio J.). Publicado em: 19/07/2018
-
3. Fracture Toughness (K1C) evaluation for dual phase medium carbon low alloy steels using circumferential notched tensile (CNT) specimens
The fracture behavior of dual phase medium carbon low alloy steels produced using two different chemical compositions (A - 0.34C, 0.75Mn, 0.12Cr, 0.13Ni steel and B - 0.3C, 0.97Mn, 0.15Cr steel) was investigated using circumferential notched tensile (CNT) specimens. Intercritical treatments were performed on samples with composition A by 1) austenitizing at
Materials Research. Publicado em: 20/05/2011
-
4. Phase transformation studies af a low alloy steel in the (α + γ) phase region
This research work describes a thermo mechanical investigation of a low alloy steel treated in the (α + γ) phase region. The aim is to develop a high tensile, ductile microstructure that could have a wide range of engineering applications. Recent advances in the area of precipitation, recrystallization mechanisms, and α / γ transformations provide strong
Materials Research. Publicado em: 2010-03
-
5. Estudo da influência das temperaturas de austenitização nas propriedades mecânicas do ferro nodular austemperado a partir da zona crítica
In the present work the influence of austenitizing temperature on mechanical properties Austempered Ductile Iron from intercritical austenitizing temperature ranges was investigated. A heat treatment for development of material with improved mechanical properties for application in suspension parts is shown. Samples of alloyed ductile iron with a fully ferri
Publicado em: 2009
-
6. Evaluation of the transformation mechanisms and mechanical properties of ferrite: martensite microalloyed steels
The influence of starting point microstructures on the transformation mechanisms and mechanical properties of a micro alloyed steel after annealing in the alpha + gamma region have been investigated. Three different microstructures: austenite, pearlite in a ferrite matrix and martensite were used as starting point microstructures for the production of dual (
Materials Research. Publicado em: 2008-03
-
7. The effect of the intercritical heat tretament on the microstructure and mechanical properties of the API 5L X65 steel / Influencia de tratamentos termicos intercriticos na microestrutura e propriedades mecanicas do aço API 5L X65
The intercritical heat treatment effect on the microstructure and mechanical properties of the API 5L X65 steel, widely used in oil and gas pipeline, was investigated. Many researchers have suggested the existence of local brittle zones in the intercritical heat treatment zone (haz) of C-Mn and HSLA (high strenth low alloy) steels of single and multipass wel
Publicado em: 2006
-
8. Estudo das transformações de fase de aços TRIP ao Si-Mn microligados com Nb. / Phase transformations study on Nb microalloyed Mn - Si TRIP steels.
The phase transformation kinetics of five Nb microalloyed Si-Mn TRIP steels was studied under continuous cooling and isothermal treatments, using dilatometric techniques, morphologic characterization, Thermocalc computational thermodynamics and Dictra numerical simulation. WDS and EDS X-ray microanalysis and Dictra numerical modeling of C, Mn and Si distribu
Publicado em: 2003
-
9. Influencia da taxa de resfriamento nas propriedades mecanicas e no micromecanismo de fratura de um aço microligado com niobio e titanio / The effect of cooling rate on the mechanical properties and fracture micromechanisms in a low carbon microalloyed niobium-titanium steel
In the last years the plain low-carbon steels have been replaced by the microalloyed steels in several applications as ship structure, pipeline, and several other applications in the automobile industry. Nowadays, a lot of effort has been pointed out to obtain steels with microstructures to improve the relationship between strength and ITacture toughness. Th
Publicado em: 1997