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Storozheva, L. M.; Escher, K.; Bode, R.; Hulka, Klaus; Burko, D. A.

doi:10.1023/a:1019666003371

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…The reason for the higher BH in sample E is related to having the lowest amount for the Nb/C ratio. The closer the Nb/C ratio is to one, the more dissolved the carbon is and the more significant is its effect on the amount of BH [ 31 , 42 ]. Precipitates act as preferred sites for recrystallization.…”

Section: Resultsmentioning

confidence: 99%

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The Effect of Adding V and Nb Microalloy Elements on the Bake Hardening Properties of ULC Steel before and after Annealing

et al. 2023

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Bake hardening (BH) is a vital part of special steel production. Studies in this field have focused on steels under homogeneous yielding, but until now, none have been conducted on the phenomena that occur for steels under heterogeneous yielding. In the current study, the effect of adding Nb and V alloying elements on the strength of ultra-low carbon (ULC) steel after bake hardening was investigated. The effects of pre-strain, grain size, and recrystallization annealing temperature were analyzed, as well as the effect of Nb and V on the yield stress caused by the bake hardening process. For this purpose, five types of alloys with different V and Nb contents were melted, cast in an induction furnace, and subjected to hot hammering and hot rolling. Then, cold rolling was applied to the samples by ~80%. To eliminate the effects of cold working, tensile samples were subjected to recrystallization annealing at 750 and 800 °C for 30 min, and the samples were quickly quenched in a mixture of a NaCl solution and ice. The annealed samples were subjected to a pre-tensile strain in the range of 2–12% and then aged in a silicone oil bath at 180 °C for 30 min. Then they were subjected to a tensile test. The obtained results showed that with the increase of the pre-strain and the annealing temperature, the values of baking hardness increased. The presence of V in the composition of steel reduced the annealing temperature.

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Section: Resultsmentioning

confidence: 99%

“…In steels whose Nb/C ratio is ~0.8, recrystallization is performed faster. Moreover, after continuous annealing, the size of the ferrite grains is larger in steel whose Nb/C ratio is 0.8 [ 31 , 42 , 43 ]. The lower the Nb/C ratio, the higher the amount of BH due to the increase in the amount of dissolved carbon in the steel.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Adding V and Nb Microalloy Elements on the Bake Hardening Properties of ULC Steel before and after Annealing

et al. 2023

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“…[1,2] Bake-hardenable steels must contain a certain minimum fraction of C for the strength increment, as bake hardening occurs by static strain aging as a result of interstitial atom segregation to dislocations. [3]This property provides a capacity for a strength increase of approximately 30 to 60 MPa from the initial yield strength.…”

Section: Introductionmentioning

confidence: 99%

Bake Hardening Properties of Ultra-Rapid Annealed Ultra-Low Carbon Bake Hardening Steel

Liu

et al. 2014

AMR

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Ultra-rapid annealing (URA) experiments were carried out to study the effect of heating rate on the recrystallization kinetics, grain size and Bake-hardening (BH) properties of Ultra-low carbon Bake Hardening Steel annealing with different heating rates followed by gas cooling (about 100°C/s) with variation of soaking times. It was shown that the degree of grain refinement is controlled by the parameters of heating rates and soaking time of the Ultra-rapid annealing cycles. For the steels investigated, the final grain size decreases with increasing heating rate and increases with increasing soaking time. The effects of dislocation density, varied by means of non-temper rolling reduction and a temper rolling reduction of 1% on the Bake-hardening properties were investigated within an aging temperature of 170°C for 20 min.

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Insights on early recovery kinetics in ferrite - pearlite cold rolled high strength sheet steels

Janakiram

Phani²,

Ummethala³

et al. 2022

Materials Characterization

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Untitled

Cited by 7 publications

References 2 publications

The Effect of Adding V and Nb Microalloy Elements on the Bake Hardening Properties of ULC Steel before and after Annealing

The Effect of Adding V and Nb Microalloy Elements on the Bake Hardening Properties of ULC Steel before and after Annealing

Bake Hardening Properties of Ultra-Rapid Annealed Ultra-Low Carbon Bake Hardening Steel

Insights on early recovery kinetics in ferrite - pearlite cold rolled high strength sheet steels

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