18-10-2014, 11:23 AM
Abstracts: This report is on improvement in Yield strength of deformed steel bar by quenching using Design of experiment (DOE). The production of high quality deformed steel bar for concrete reinforcement will reduce the construction cost. It is found that the bar produced having variation in yield strength, this major quality problem is considered for improvement. Yield strength of bar is deviated from standard value specified in IS: 1786-1985. Here the study is focused on the parameter design for cooling system, to control the process of quenching to get the desired Yield strength of deformed steel bar. The controlling parameters of cooling system were controlled to improve the Yield strength of bar produced. Taguchi method of Orthogonal Array was used to find the effect of parameter on output quality parameter such as yield strength. DOE by Taguchi approach was used for the improvement in Yield strength. We got satisfactory result of yield strength of deformed steel bar having minimum variation from its mean value. Thus the Yield strength of bar has been improved by controlling the Quenching process parameters at optimum level which was found from factor effect plot using DOE by Taguchi Method.