Austenite can be retained at ambient temperature in steels by alloying and processing control. The transformation from austenite to martensite occurs under a certain conditions : thermal or deformation. Stress-strain ...Austenite can be retained at ambient temperature in steels by alloying and processing control. The transformation from austenite to martensite occurs under a certain conditions : thermal or deformation. Stress-strain induced martensitic transformation is important to improve the plasticity of steels which is called transformation induced plasticity (TRIP). Strength-ductility balance of the steels is greatly superior to that of other high strength steels due to the TRIP effect. A new type of steels-TRIP steel is developed展开更多
HSLA steels constitute one of the main types of steels produced worldwide by Thin Slab Direct Rolling technologies (TSDR).Among microalloying elements,the most widely used are V,Nb and Ti.These elements play different...HSLA steels constitute one of the main types of steels produced worldwide by Thin Slab Direct Rolling technologies (TSDR).Among microalloying elements,the most widely used are V,Nb and Ti.These elements play different roles during the austenite evolution in TSDR.Regarding austenite conditioning before transformation,the limitations in the total reduction that can be applied in TSDR technologies need to be considered when composition/process parameters are selected.In this context,whereas an important number of studies have been focused on Nb microalloyed grades,a less systematic analysis has been performed concerning the role of vanadium on austenite conditioning.This paper analyzes these singularities taking into account different process parameter conditions,such as total reduction and initial rolling temperature.展开更多
文摘Austenite can be retained at ambient temperature in steels by alloying and processing control. The transformation from austenite to martensite occurs under a certain conditions : thermal or deformation. Stress-strain induced martensitic transformation is important to improve the plasticity of steels which is called transformation induced plasticity (TRIP). Strength-ductility balance of the steels is greatly superior to that of other high strength steels due to the TRIP effect. A new type of steels-TRIP steel is developed
文摘HSLA steels constitute one of the main types of steels produced worldwide by Thin Slab Direct Rolling technologies (TSDR).Among microalloying elements,the most widely used are V,Nb and Ti.These elements play different roles during the austenite evolution in TSDR.Regarding austenite conditioning before transformation,the limitations in the total reduction that can be applied in TSDR technologies need to be considered when composition/process parameters are selected.In this context,whereas an important number of studies have been focused on Nb microalloyed grades,a less systematic analysis has been performed concerning the role of vanadium on austenite conditioning.This paper analyzes these singularities taking into account different process parameter conditions,such as total reduction and initial rolling temperature.
