التفاصيل البيبلوغرافية
| العنوان: |
STUDY OF MAIZE STARCH SOLUTION AS QUENCHING MEDIA FOR 0.62%C HIGH CARBON STEEL. |
| المؤلفون: |
DODO, R. M., AUSE, T., SHEHU, U., ABDULHAMID, S., ONOJA, K. K. |
| المصدر: |
Annals of the Faculty of Engineering Hunedoara - International Journal of Engineering; Nov2017, Vol. 15 Issue 4, p63-68, 6p |
| مصطلحات موضوعية: |
CORNSTARCH, QUENCHING (Chemistry), CARBON steel |
| مستخلص: |
A study of maize starch as a quenching medium for high carbon steel was carried out. Samples of high carbon steel were spheroidized annealed and then machined prior to the Hardening process. Maize starch of three different viscosities was prepared by adding varying amounts of water; such that the ratios of maize starch to water (m-w) were 1:39, 1:27.6 and 1:17.2. The samples were normalized and then austenitized at 800oC, soaked for 40 minutes and then quenched in water, engine oil and maize starch solutions (in the ratio mentioned above). Cooling curves of all the quenching media used were developed. Mechanical properties (hardness and impact strength) of the test samples were measured. The test results obtained, sample quenched in the maize starch solution (m-w [1:39]) showed highest hardness and lowest impact strength values. Microstructures of the quenched samples were analyzed using optical microscopy (OM) and scanning electron microscopy (SEM). In all the tests samples, martensite structure was observed. It was also observed that maize starch solutions with mixture ratio m-w (1:27.6) and (1:17.18) had quenching severity lower than that of engine oil. Maize starch solution ms-w (1:39) gives cooling rate close to that of engine oil. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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