特殊钢
特殊鋼
특수강
SPECIAL STEEL
2014年
5期
47-49
,共3页
600 MPa低硅Nb-Ti微合金化双相钢%3.5 mm板%开发
600 MPa低硅Nb-Ti微閤金化雙相鋼%3.5 mm闆%開髮
600 MPa저규Nb-Ti미합금화쌍상강%3.5 mm판%개발
通过真空感应炉熔炼和浇铸的50 kg锭锻成40 mm× 150 mm坯和热轧成10 mm板以及热模拟试验研究了开发的低硅Nb-Ti微合金化双相钢(/％:0.082C,0.15Si,1.20Mn,0.010P,0.002S,0.020Nb,0.015Ti,0.045Al,0.003 5 N)静态和动态连续冷却转变(CCT)曲线、组织(11％马氏体+89％铁素体)和力学性能(抗拉强度682 MPa).并通过铁水脱硫-260 t BOF-LF-RH-230 mm×1 300 mm连铸-热轧工艺试制了低硅双相钢(/％:0.075C,0.15Si,1.16Mn,0.012P,0.003S,0.016Nb,0.015Ti,0.033Al,0.004 3 N) 3.5mm板.结果表明,精轧出口温度810℃,水冷至700℃,空冷4.5s,卷取温度150℃时,该钢的组织为15％马氏体+85％铁素体,晶粒度12～ 12.5级,抗拉强度672～692 MPa,伸长率24.0％～28.5％,屈强比0.65～0.67,钢板冲压成塑性能优良,制造的轿车轮辐弯曲疲劳性能15×104次.
通過真空感應爐鎔煉和澆鑄的50 kg錠鍛成40 mm× 150 mm坯和熱軋成10 mm闆以及熱模擬試驗研究瞭開髮的低硅Nb-Ti微閤金化雙相鋼(/％:0.082C,0.15Si,1.20Mn,0.010P,0.002S,0.020Nb,0.015Ti,0.045Al,0.003 5 N)靜態和動態連續冷卻轉變(CCT)麯線、組織(11％馬氏體+89％鐵素體)和力學性能(抗拉彊度682 MPa).併通過鐵水脫硫-260 t BOF-LF-RH-230 mm×1 300 mm連鑄-熱軋工藝試製瞭低硅雙相鋼(/％:0.075C,0.15Si,1.16Mn,0.012P,0.003S,0.016Nb,0.015Ti,0.033Al,0.004 3 N) 3.5mm闆.結果錶明,精軋齣口溫度810℃,水冷至700℃,空冷4.5s,捲取溫度150℃時,該鋼的組織為15％馬氏體+85％鐵素體,晶粒度12～ 12.5級,抗拉彊度672～692 MPa,伸長率24.0％～28.5％,屈彊比0.65～0.67,鋼闆遲壓成塑性能優良,製造的轎車輪輻彎麯疲勞性能15×104次.
통과진공감응로용련화요주적50 kg정단성40 mm× 150 mm배화열알성10 mm판이급열모의시험연구료개발적저규Nb-Ti미합금화쌍상강(/％:0.082C,0.15Si,1.20Mn,0.010P,0.002S,0.020Nb,0.015Ti,0.045Al,0.003 5 N)정태화동태련속냉각전변(CCT)곡선、조직(11％마씨체+89％철소체)화역학성능(항랍강도682 MPa).병통과철수탈류-260 t BOF-LF-RH-230 mm×1 300 mm련주-열알공예시제료저규쌍상강(/％:0.075C,0.15Si,1.16Mn,0.012P,0.003S,0.016Nb,0.015Ti,0.033Al,0.004 3 N) 3.5mm판.결과표명,정알출구온도810℃,수랭지700℃,공랭4.5s,권취온도150℃시,해강적조직위15％마씨체+85％철소체,정립도12～ 12.5급,항랍강도672～692 MPa,신장솔24.0％～28.5％,굴강비0.65～0.67,강판충압성소성능우량,제조적교차륜복만곡피로성능15×104차.
