特殊钢
特殊鋼
특수강
SPECIAL STEEL
2014年
3期
53-55
,共3页
程晓杰%李振%蔡阿云%乔建军%孙建华%赵爱民
程曉傑%李振%蔡阿雲%喬建軍%孫建華%趙愛民
정효걸%리진%채아운%교건군%손건화%조애민
IF钢%连续退火温度%力学性能%组织%织构
IF鋼%連續退火溫度%力學性能%組織%織構
IF강%련속퇴화온도%역학성능%조직%직구
试验用390 MPa级IF钢(/％:0.005C,0.04Si,0.35Mn,0.095P,0.005S,0.030Nb,0.016Ti,0.036Alt)0.8 mm冷轧板由4 mm热轧板冷轧生产.研究了连续退火温度780～820℃对该IF钢组织、织构和力学性能的影响.结果表明,当连续退火温度由780℃提高至820℃时,IF钢的屈服和抗拉强度分别由282 MPa和432 MPa降至249 MPa和405 MPa,伸长率A5o和塑性应变比rm分别从37.2％和1.45提高到41.7％和1.84,具有较好的深冲性能;但随退火温度升高,平面各向异性指数△r由0.44提高到0.65,铁素体晶粒尺寸增大,组织均匀变差,同时变形织构{112} <110>变弱,有利织构{111} <110>增强,{001} <110>变弱,综合考虑退火温度控制在820℃左右为宜.
試驗用390 MPa級IF鋼(/％:0.005C,0.04Si,0.35Mn,0.095P,0.005S,0.030Nb,0.016Ti,0.036Alt)0.8 mm冷軋闆由4 mm熱軋闆冷軋生產.研究瞭連續退火溫度780～820℃對該IF鋼組織、織構和力學性能的影響.結果錶明,噹連續退火溫度由780℃提高至820℃時,IF鋼的屈服和抗拉彊度分彆由282 MPa和432 MPa降至249 MPa和405 MPa,伸長率A5o和塑性應變比rm分彆從37.2％和1.45提高到41.7％和1.84,具有較好的深遲性能;但隨退火溫度升高,平麵各嚮異性指數△r由0.44提高到0.65,鐵素體晶粒呎吋增大,組織均勻變差,同時變形織構{112} <110>變弱,有利織構{111} <110>增彊,{001} <110>變弱,綜閤攷慮退火溫度控製在820℃左右為宜.
시험용390 MPa급IF강(/％:0.005C,0.04Si,0.35Mn,0.095P,0.005S,0.030Nb,0.016Ti,0.036Alt)0.8 mm랭알판유4 mm열알판랭알생산.연구료련속퇴화온도780～820℃대해IF강조직、직구화역학성능적영향.결과표명,당련속퇴화온도유780℃제고지820℃시,IF강적굴복화항랍강도분별유282 MPa화432 MPa강지249 MPa화405 MPa,신장솔A5o화소성응변비rm분별종37.2％화1.45제고도41.7％화1.84,구유교호적심충성능;단수퇴화온도승고,평면각향이성지수△r유0.44제고도0.65,철소체정립척촌증대,조직균균변차,동시변형직구{112} <110>변약,유리직구{111} <110>증강,{001} <110>변약,종합고필퇴화온도공제재820℃좌우위의.
