microalloyed steels
Study of the Effects of Micro and Nanolayered Structures on Mechanical Response of Microalloyed Steels
... study microalloyed steels, effects of precipitation and solid solution strengthening, first of all Nb solute elements, indicatively influence the microstructure ...the microalloyed ferrite and ...
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Processes, microstructure and properties of vanadium microalloyed steels
... However, the APFIM technique is only available in a few laboratories, and the probability of observing a particle in the small FIM specimen is low, which means that the statistics of particle size and distribution is ...
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Influence of AlN precipitation on thermodynamic parameters in Al V N microalloyed steels
... C-Al-V-N microalloyed steels at different austenitising temperatures was made by calculations based on experimental ...experimental steels has a more significant influence on these equilibrium ...
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Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging: Part I - Processing parameters, mechanical properties and microstructure
... in Steels V and V-N. Some values of the multiple microalloyed steels follow the same trend, while the addition of Nb or Ti, under some processing conditions, lead to a smaller grain size than the ...
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Thermomechanical processing route to achieve ultrafine grains in low carbon microalloyed steels
... cast microalloyed steels containing Nb (designated “Nb steel” ), and Nb and Ti (designated “Nb - Ti steel”), which were made by vacuum induction melting and cast into ingots having dimensions 220 mm × 65 mm ...
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The Influence of Titanium and Vanadium on Isothermal Growth Kinetics of Allotriomorphic Ferrite in Medium Carbon Microalloyed Steels
... first transformation in austenite decomposition during cooling, allotriomorphic ferrite affects indirectly the subsequent austenite phase transformations. Although several investigations have been reported in the ...
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Characterisation of strain-induced precipitation behaviour in microalloyed steels during thermomechanical controlled processing
... Microalloyed steels represent an important class of steel used in the automotive, construction, transportation and energy sectors. They are relatively easy to fabricate, and have good strength and toughness ...
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Evolution of precipitates, in particular cruciform and cuboid particles, during simulated direct charging of thin slab cast vanadium microalloyed steels
... niobium and nitrogen) which would normally be expected to contribute to dispersion hardening by precipitating in ferrite as a fine particle dispersion circa 2-15 nm in size. Zhou and Priestner 18 observed cruciforms in ...
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Microalloyed steels
... in microalloyed steels, which had been reported to have differing effects when used with additions of niobium compared to ...three steels containing nominally ...Ti-Nb steels, but containing a ...
179
The effect of molybdenum on interphase precipitation and microstructures in microalloyed steels containing titanium and vanadium
... Figs. 2 and 3 show the microstructure and the ferrite grain size. The Ti-microalloyed steels exhibited finer ferrite grain size than the V-microalloyed steels for both transformation ...
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Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging. Part 2 - chemical characterisation of dispersion strengthening precipitates
... The results presented here appear at odds with the thermodynamic predictions and indeed much of the historical perception for vanadium microalloyed steels undergoing a decomposition to ferrite i.e. the ...
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The effect of thermomechanical controlled processing on recrystallisation and subsequent deformation-induced ferrite transformation textures in microalloyed steels
... Microalloyed steels have been widely used in a variety of industrial sectors, such as construction, energy and automotive ...to steels with excel- lent formability, strength and toughness [3, ...the ...
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The Role of Inclusions and Austenite Grain Size on Intragranular Nucleation of Ferrite in Medium Carbon Microalloyed Steels
... S2 steels after full isothermal decomposition of austenite, is formed by pro- eutectoid ferrite (allotriomorphic and idiomorphic) and pearlite, in all the temperature range ...
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The role of zirconium in microalloyed steels
... 55 three steels, one set without a zirconium addition, the other with zirconium alone or in combination with niobium or vanadium. Steel8, with 0.072%Zr showed the highest toughness values. The effect of zirconium ...
104
Titanium microalloyed steels
... MA steels containing Ti, Ti–V and Ti–Nb, with different levels of ...Ti–Nb steels, 29 and ...Ti–V steels from ...the steels with Ti and Ti–V additions, but was not given for those with ...
204
Effect of the morphology of the martensite-austenite phase on fracture of the weld heat affected zone in vanadium and niobium microalloyed steels
... cases of cracking of both the blocky and the stringer-type of M-A particles were observed on the vertical sections close to the fracture surfaces and also on the fracture surfaces. Examples of cracking of the blocky M-A ...
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Vanadium microalloyed steel for thin slab casting and direct rolling
... V steels, increases the solution temperature of vanadium in austenite, resulting in precipitation of vanadium at higher temperatures during casting and ...containing steels, large dendritic particles were ...
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Containing Vanadium and Titanium Steel Research Status and Prospects
... Jiao Lan[17] studied the microstructure and properties of the heat affected zone of the micro Ti pipeline steel, and the addition of a little Ti to low alloy high strength steel and increase the strength of the steel, ...
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The Effects of Hot Deformation Parameters on the Size of Dynamically Recrystallised Austenite Grains of HSLA Steel
... In microalloyed steels, the effect of second phase particles on dynamic recrystallization depends on their size, shape and distribution in the matrix. If the secondary phase particles are fine and of high ...
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Effect of Boron on the Hot Ductility of Low Carbon Nb Ti Microalloyed Steel
... Hot tensile tests were performed to examine the effect of boron on the hot ductility of Nb-Ti-microalloyed steels. The equilibrium precip- itation in the steel was predicted by Thermo-Calc calculation. The ...
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