Publication: Estimation of ferrite grain size and mechanical properties of a 22MnVNb6 microalloyed low carbon cast steel
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Issued Date
2018
Resource Type
File Type
application/pdf
ISSN
3246051
Other identifier(s)
2-s2.0-85040762761
Rights Holder(s)
Scopus
Bibliographic Citation
Periodica Polytechnica Mechanical Engineering. Vol 62, No.1 (2018), p.83-89
Suggested Citation
Pluphrach G., Yamsai S. Estimation of ferrite grain size and mechanical properties of a 22MnVNb6 microalloyed low carbon cast steel. Periodica Polytechnica Mechanical Engineering. Vol 62, No.1 (2018), p.83-89. doi:10.3311/PPme.11458 Retrieved from: https://hdl.handle.net/20.500.14740/3886
Author(s)
Abstract
The ferrite grain size of a 22MnVNb6 microalloyed steel can be estimated by developing a relationship between ferrite grain size, austenitising temperature and cooling rate from austeni-tising time, temperature. An extended Hall-Petch relationship was used to estimate the yield stress from the estimation fer-rite grain size. Heat treatment as the annealing was used to improve the tensile and hardness properties of the steel. It was shown that the best combination of tensile and hardness properties were achieved when a higher austenitising temperature was used. Transmission electron and optical microscopy were used to study the morphology of ferrite and pearlite formed by the heat treatments. The microstructural studies showed that partition of grain by as-cast state was probably the reason for austenite and ferrite grain size improvement. Considering the experimental results, maximum errors of 14.5% and 7.5% were found in the estimation of ferrite grain size and tensile strength, respectively.
Subject(s)
Carbon
Ferrite
Grain size and shape
Hardness
Heat treatment
Light transmission
Low carbon steel
Manganese alloys
Mechanical properties
Microalloying
Niobium alloys
Steel metallography
Tensile strength
Ternary alloys
Vanadium alloys
Yield stress
Cooling rates
Ferrite grain size
Grain size
Hall Petch relationship
Maximum error
Micro-alloyed steels
Micro-structural
Transmission electron
Steel castings
Ferrite
Grain size and shape
Hardness
Heat treatment
Light transmission
Low carbon steel
Manganese alloys
Mechanical properties
Microalloying
Niobium alloys
Steel metallography
Tensile strength
Ternary alloys
Vanadium alloys
Yield stress
Cooling rates
Ferrite grain size
Grain size
Hall Petch relationship
Maximum error
Micro-alloyed steels
Micro-structural
Transmission electron
Steel castings