Effect of Tempering Temperature on Mechanical Properties of Medium Carbon Steel

Tukur, S.A; Usman, Mustapha; Muhammad, Isyaku; Sulaiman, Noralfishah

doi:10.14445/22315381/ijett-v9p350

Cited by 24 publications

(19 citation statements)

References 11 publications

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“…It can also be observed that the black spots (non-metallic impurities) have been dissolved during the heat treatment. Martensite is observed as a mass of needle-like structures, which are very strong and hard, but very brittle, with the increase in hardness being attributable to the higher volume fraction of the harder martensite in the steel (Tukur et al, 2014). Microstructure after Tempering: Plate 7 shows the photomicrograph after tempering at 600 °C (previously quenched from 900 °C).…”

Section: Hardness and Tensile Strength After Heat Treatmentmentioning

confidence: 99%

“…This can be achieved practically by the process of heat treatment. According Tukur et al (2014), medium carbon steel in its tempered state, provides one of the best combinations of strength and toughness obtainable in medium carbon steels and that this makes tempering of martensite one of the most important heat treatments in modern steelmaking. Therefore, different combinations of time and temperature can give the desired mechanical properties during tempering, but temperature has the highest impact on tempering effect.…”

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confidence: 99%

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Evaluation of combined heat treatment techniques of testing hardness and tensile strength of mild carbon steel commonly used in Nigeria

Adamu¹,

Adamu²,

Salihu³

et al. 2019

Journal of Applied Sciences and Environmental Management

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This study investigated effect of combined heat treatment on the hardness and tensile strength of 0.25 -0.35 grade of medium carbon steel. Heat treatment at 900 °C for four hours was done and six specimens of each were then quenched in water. Results showed that the hardness and tensile strength ranged from 113.7 to 184.4 HB and from 383.84 to 621.2 N/mm 2 , respectively, for hardening temperature from 700 to 950 °C; and were from 180.2 to 125.5 HB and 594.7 to 4143 N/mm 2 , respectively, when the steel was quenched from 900 °C for tempering temperatures from 250 to 600 °C. The result of tempering (from 250 to 600 °C) when previously quenched (from 850 °C) steel showed decreasing values of hardness (from 400 to 248 HB) and of tensile strength (from 1320 to 819 N/mm 2 ). The microstructure of the normalized sample was observed to be finer and more homogenized than the one observed in the as-rolled condition of the sample. This invariably led to the higher hardness and tensile strength values recorded.

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Section: Hardness and Tensile Strength After Heat Treatmentmentioning

confidence: 99%

mentioning

confidence: 99%

Evaluation of combined heat treatment techniques of testing hardness and tensile strength of mild carbon steel commonly used in Nigeria

Adamu¹,

Adamu²,

Salihu³

et al. 2019

Journal of Applied Sciences and Environmental Management

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show abstract

“…The cementite acted as hydrogen trapping sites, which can limit the movement of hydrogen atoms and thus prevent HIE. 21) The tempered 10B21 screws are examined using XRD analysis; the results are shown in Fig. 9.…”

Section: Tempering Effect On Hie Susceptibilitymentioning

confidence: 99%

Effects of Tempered Microstructure and Hydrogen Concentration on Hydrogen-Induced Embrittlement Susceptibility of 10B21 Screws at Low Temperature

et al. 2018

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Secondary ion mass spectroscopy (SIMS) was used to examine the hydrogen atoms in low-carbon boron (10B21) steel screws. The effects of baking and tempering treatments on the hydrogen-induced embrittlement (HIE) susceptibility of the screws were investigated. SIMS results confirmed that hydrogen concentration decreased with increasing baking duration, and thus increased the engineering reliability of the screws. For low-temperature applications, 10B21 screws must be baked for a longer duration to prevent HIE. The observed tempered martensite was composed of ferrite and cementite, which could limit the movement of hydrogen atoms. At higher tempering temperature, the structure of the screw matrix became finer, reducing the HIE susceptibility. 10B21 screws tempered at a high temperature thus had good ability to resist lowtemperature HIE. [

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“…The purpose of their study was to investigate the influence of different quenching media on the hardened depth of AISI steel they demonstrated as to how these parameters can effect the hardness from the surface to the core of samples they concluded that the hardness of the quenched samples at certain depths can be estimated on the basis of heat transfer equations. S.A. Takur etal [8], worked on effect of tempering temperature of mechanical properties of Medium Carbon Steel. Most of the applications require that the quenched part be tempered so as to impact same toughness and further improve ductility.…”

Section: Litrature Reviewmentioning

confidence: 99%

Experimental Investigation on the Mechanical Properties of Al Alloy with Different Quenching Media

Rao¹

2017

IJRASET

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This paper examines the effect of microstructure and mechanical properties of aluminium alloy. Aluminium and its alloys have been indentified as an important and useful engineering material. It is attracted by its various unique properties, such as appearance, strength-to-weight ratio, excellent thermal properties, workability properties and good mechanical behaviour. In this experiment, there were 2 sets (7 samples each) aluminium alloy prepared. Prepared specimens quenched for one hour by two different media (water & cow urine). Specimens prepared to apply tensile, yield strength and hardness test and show the effect of medias cooling rate on mechanical properties and microstructure of all specimens examined. In water media tensile, yield strength and hardness were improved, cow urine contributed in decrease tensile and yield strength properties because grain size larger, but hardness slightly improved.

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Effect of Tempering Temperature on Mechanical Properties of Medium Carbon Steel

Cited by 24 publications

References 11 publications

Evaluation of combined heat treatment techniques of testing hardness and tensile strength of mild carbon steel commonly used in Nigeria

Evaluation of combined heat treatment techniques of testing hardness and tensile strength of mild carbon steel commonly used in Nigeria

Effects of Tempered Microstructure and Hydrogen Concentration on Hydrogen-Induced Embrittlement Susceptibility of 10B21 Screws at Low Temperature

Experimental Investigation on the Mechanical Properties of Al Alloy with Different Quenching Media

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