The Study of the Impact of Nano Carbon Additives on Astm A53 Mild Steel During Machining

2nd International Conference on Engineering for Sustainable World

Afolalu, Sunday A.^1 ; Oluwaseyifunmi, Orenuga^1 ; Ongbali, Samson O.^1 ; Abioye, Abiodun A.^1 ; Okokpujie, Imhade P.^1 ; Oloyede, Olamilekan R^2

Mechanical Engineering Department, Covenant University, Ota. Ogun-State, Nigeria^1

Mechanical and Mechatronics Engineering Department, Afe Babalola University, Ado. Ekiti-State, Nigeria^2

关键词: Carbon additives;    carburization;    Elemental compositions;    High temperature;    Holding temperatures;    Muffle furnaces;    Palm kernel shells;    Surface hardness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/413/1/012028/pdf
DOI  :  10.1088/1757-899X/413/1/012028

来源: IOP

【 摘 要 】

In the world today, most of the treated steels were done using chemicals which in turn degrades rapidly. This study developed treated metal from ASTM A53 mild steel using pulverized palm kernel shell as carburizer and egg shell as energizer due to their high carbon and calcium carbonate content. Samples of hundred (100) pieces of ASTM A53 mild steel with dimensional size of 100 x 30 mm each were used. The elemental composition of the sample was checked using UV-VIZ spectrometric machine. Four sets of steel boxes were fabricated in the dimensions of 200 x 50 x 200 mm with two faces detachable and small extension for carrying the boxes at high temperature. Prepared samples buried in pulverized carburizer and energizer at a mixed percentage ratio of 80 to 20 were put together in a muffle furnace (2,500°C max) for case hardening at different holding temperature and time of (HT- 60, 90, 120 and 180 minutes) and (CT- 950, 1000, 1050, 1100°C). This procedure was repeated severally with varying holding time and temperatures. The initial experiment started from 950°C and rose up to1100°C. The hardness for surface, interface and core were taken using hardness tester. Surface hardness of 139.4 HV at holding temperature 980°C and time 180 minutes gave best increase of 43% over the control of 79.7 HV while hardness at interface and core were 146 HV and 147 HV with percentages increase of 9 and 15.3 was achieved. The findings in this study also confirmed that waste materials with some element of carbon can be used to replace foreign chemicals intended for the same purpose.