Optimization of Strain Hardening Exponent in Hot Rolled Nb-microalloyed Steel Sheets Using Factorial Design

Publish Year: 1392
نوع سند: مقاله کنفرانسی
زبان: English
View: 1,146

This Paper With 6 Page And PDF Format Ready To Download

  • Certificate
  • من نویسنده این مقاله هستم

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این Paper:

شناسه ملی سند علمی:

ASCME07_270

تاریخ نمایه سازی: 4 اسفند 1392

Abstract:

Hot rolling is a metalworking process performed above the recrystallization temperature of the material and sometime in non-recrystallization area. In sheet metalforming, strain hardening exponent plays a crucial role. The purpose of this paper is to determine the influence of major hot rolling process parameters of roughing,finishing and coiling temperatures on strain hardening exponent of Nb-microalloyed steel sheet and optimizingthese parameters to obtain maximum strain hardening exponent. For this purpose, four levels for the above temperatures were chosen and 192 experiments wereconducted based on general full factorial design and three replication of experiment. Analysis of variance was done to determine the most significant factors affectingthe response and develop a mathematical model relating the above process parameters to the strain hardeningexponent. Based on calculations, optimum values of the parameters were obtained. It is observed that increasing the coiling and finishing temperatures causes an increaseof the strain hardening exponent. Also, microstructure analysis indicates that decreasing the coiling andfinishing temperatures effectively causes more grainrefinement of the microstructure, and the morphology is changed from polygonal ferrite to an acicular one.Findings of this research show that the predicted values obtained are close to the experimental value indicating suitability of the model.

Authors

Mohsen Ayaz

M.S. Student, Shahid Rajaee Teacher Training University/Department of Mechanical Engineering

Nasrollah Bani Mostafa Arab

Assistant Professor, Shahid Rajaee Teacher Training University/Department of Mechanical Engineering

Daavood Mirahmadi Khaki

Lecturer, Shahid Rajaee Teacher Training University/Department of Materials Engineering

Mohammadmorad Sheikhi

Assistant Professor, Shahid Rajaee Teacher Training University/Department of Mechanical Engineering

مراجع و منابع این Paper:

لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :
  • Zrnik, J., Kvackaj, T., Sripinproach, D., and Sri charoenchai, P., ...
  • Altan, T., 1985. Metal Forming; Fundamentals and Applications, Metals Park, ...
  • effect of grain size _ Theء [3] Morrison, W. B., ...
  • Antoine, P., Vandeputte, S., and Vogt, J., B., 2006. "Empirical ...
  • Umemoto, M., Liu, Z., G., Sugimoto, S., and Tsuchiya, K., ...
  • نمایش کامل مراجع