جوشکاری همزن اصطکاکی فولاد زنگ نزن فریتی 430

نوع مقاله : علمی و پژوهشی

نویسندگان

دانشگاه صنعتی سهند تبریز

چکیده

جوش بدون درزی بر روی ورق 2 میلیمتری فولاد زنگ­نزن فریتی 430 با فرایند جوشکاری همزن اصطکاکی با سرعت چرخشی 400 دور بر دقیقه و سرعت پیشروی 50 میلیمتر بر دقیقه ایجاد گردید. مشاهدات ریزساختاری نشان داد که در ناحیه ریزساختاری متاثر از عملیات ترمومکانیکی جوش در اثر وقوع مکانیزم بازیابی دینامیکی کسر بزرگی از مرزدانه­های کوچک زاویه تشکیل شده است. از طرف دیگر در ناحیه همزده جوش در اثر وقوع تبلور مجدد دینامیکی دانه­های بسیار ریز به همراه کسر بزرگی از مرزدانه­های بزرگ زاویه ایجاد شده است. همچنین، تصویر قطبی محاسبه شده نشان داد که بافت برشی در ناحیه همزده توسعه یافته است.

کلیدواژه‌ها


عنوان مقاله [English]

Friction Stir Welding of 430 Ferritic Stainless Steel

نویسندگان [English]

  • sajad emami
  • Tohid Saeid
  • Rasoul Azari Khosroshahi
sahand university of technology
چکیده [English]

Friction stir welding was conducted on a 430 austenitic stainless steel plate with thickness of 2 mm. The welding procedure was performed at a welding speed of 50 mm/min and rotational speed of 400 rpm. Microstructure observations showed high fraction of low angle grain boundaries formed in the thermo mechanically affected zone through the occurrence of dynamic recovery. Severe grain refinement took place in the stir zone with the formation of high fraction of high angle grain boundaries through dynamic recrystallization. Calculated pole figure showed that shear texture developed in the stir zone.

کلیدواژه‌ها [English]

  • Friction Stir Welding
  • stainless steels
  • dynamic recovery
  • Dynamic Recrystallization
  • shear texture
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