Study on Effective Parameters on Cold Forming of pressure vessel Sheets

Publish Year: 1397
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

IMES12_161

تاریخ نمایه سازی: 11 اردیبهشت 1398

Abstract:

In this study, the cold formation of pressure vessel sheet was investigated by using open-die pressingprocess. The rolled sheet of A516 Gr70 with thickness of 45 mm was selected. The radius of the die was6000 mm to pressing process. The process was carried out in three passes. In each pass, force of 600 tonswas applied. The process was performed in passes 1, and in order to reduce the effect of the springback and to check the effect of the repetition of formation process on mechanical properties andmicrostructure of the formed sheets. The results showed that the tensile strength, yield stress and hardnessare reduced at the first step of pressing process. In the following, the mechanical properties are increasedby repeating the pressing process in and passes. Microstructural analysis showed that the order ofrolling grains was disrupted and the orientation of the first grains would greatly change by performing thepressing process. By increasing the number of passes, the orientation of the grains become more uniformthat causes the enhancement of mechanical properties.

Authors

Mohammad Mahdi Esfahani

Master of Science in Material Engineering, Machine Sazi Arak

Ebrahim Roshanaei

Managing Director of Metallurgy Group Machine Sazi Arak

Alireza Nouri

Engineering Manager of Metallurgy Group Machine Sazi Arak

Mojtab Esmailzadeh

Assistant Professor, Persian Gulf University, Bushehr