فهرست:
فصل اول مقدمه ................................................................................................. 1
فصل دوم :مروری بر منابع ............................................................................... 4
1-2- فولادهای کم آلیاژ و دارای استحکام بالا ............................................. 5
1-1-2- طبقه بندی فولادهای کم آلیاژ دارای استحکام بالا .............. 6
2-1-2- اثرات افزودنی های میکروآلیاژ کننده ................................... 8
3-1-2- انواع گوناگون فولادهای فریت – پرلیت میکروآلیاژ شده . 8
4-1-2- اثرات عناصر میکروآلیاژی روی مشخصه های به عمل آوری 18
5-1-2- به عمل آوری فولادهای پتک کاری میکروآلیاژ شده .......... 19
6-1-2- کنترل خصوصیات ..................................................................... 19
7-1-2-اثرات عناصر میکروآلیاژی شده روی پتک کاری ................. 20
2-2- مهندسی محصولات آهنگری فولادهای ساختمانی میکروآلیاژی ... 22
3-2- تبلور مجدد استاتیکی فولاد آستنیت تغییر شکل یافته و رسوب سینتیک القا شده در فولادهای میکروآلیاژی وانادیوم ........................................................................................ 35
1-3-2- تبلور مجدد استاتیکی ............................................................. 37
2-3-2- نمودارهای دما و زمان رسوب PTT ...................................... 48
3-3-2- مقایسه ی بین Tnr , SRCT ................................................. 51
4-2- ریز ساختار و ویژگی های فولاد کم آلیاژ مقاوم به دما...................... 54
1-4-2- ترکیب شیمیایی ....................................................................... 58
2-4-2-پردازش و عمل آوری ترمو مکانیکی....................................... 59
3-4-2- ریز ساختار ............................................................................... 62
4-4-2- تنش تسلیم دمای فزاینده ..................................................... 63
5-4-2- سختی ضربه ای ....................................................................... 65
6-4-2- مقاومت به دما............................................................................ 66
5-2- فرآیند ترمو مکانیکی و ریز ساختار فولاد میکرو آلیاژی و محصولات میله ای سیمی 68
1-5-2- میکروساختار و خواص آن ........................................................ 72
2-5-2- پیشرفت های بعدی ................................................................... 76
6-2- بهبود استحکام ضربه و خواص کششی در فولاد میکروآلیاژی آهنگری گرم وانادیوم – نیوبیوم از طریق کنترل میکروساختار .............................................................................. 77
1-6-2- خواص مکانیکی ............................................................................ 80
2-6-2- میکروساختار ............................................................................... 85
3-6-2- میکروساختار .............................................................................. 90
4-6-2- خواص مکانیکی ........................................................................... 93
فصل سوم:نتیجه گیری و پیشنهادات.............................................................. 95
نتیجه گیری ........................................................................................................ 96
پیشنهادات.......................................................................................................... 98
مراجع .................................................................................................................. 99
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