特殊钢
特殊鋼
특수강
Special Steel
2015年
5期
55-58
,共4页
周雯%吴开明%王厚昕%郭爱民%邹德辉%李书瑞
週雯%吳開明%王厚昕%郭愛民%鄒德輝%李書瑞
주문%오개명%왕후흔%곽애민%추덕휘%리서서
Nb-Ti微合金化%Q370qE-HPS桥梁钢%连铸坯%正火Q370qE钢%热塑性
Nb-Ti微閤金化%Q370qE-HPS橋樑鋼%連鑄坯%正火Q370qE鋼%熱塑性
Nb-Ti미합금화%Q370qE-HPS교량강%련주배%정화Q370qE강%열소성
利用Gleeble 1500D热模拟试验机,对开发的Q370qE-HPS高性能桥梁钢(/％:0.09C,0.36Si,1.33Mn,0.013P,0.004S,0.036Nb,0.015Ti,0.022Als,0.33CEV)230 mm×1 400 mm连铸坯进行700 ～1 050℃的热塑性试验研究.结果表明,Q370qE-HPS高性能桥梁钢800～ 1050℃为高塑性区间,与传统正火工艺桥梁钢Q370qE(/％:0.14C,0.38Si,1.45Mn,0.012P,0.004S,0.028Nb,0.014Ti,0.023Als,0.38CEV)相比较,Q370qE-HPS钢高塑性的温度范围较大;700～ 800℃为低塑性区间,在此区间沿奥氏体晶界析出的铁素体膜使抗拉强度降低,尤其当晶界处存在Nb-Ti碳氮化物时,应力作用下容易产生裂纹和孔隙,从而使钢的热塑性降低.
利用Gleeble 1500D熱模擬試驗機,對開髮的Q370qE-HPS高性能橋樑鋼(/％:0.09C,0.36Si,1.33Mn,0.013P,0.004S,0.036Nb,0.015Ti,0.022Als,0.33CEV)230 mm×1 400 mm連鑄坯進行700 ～1 050℃的熱塑性試驗研究.結果錶明,Q370qE-HPS高性能橋樑鋼800～ 1050℃為高塑性區間,與傳統正火工藝橋樑鋼Q370qE(/％:0.14C,0.38Si,1.45Mn,0.012P,0.004S,0.028Nb,0.014Ti,0.023Als,0.38CEV)相比較,Q370qE-HPS鋼高塑性的溫度範圍較大;700～ 800℃為低塑性區間,在此區間沿奧氏體晶界析齣的鐵素體膜使抗拉彊度降低,尤其噹晶界處存在Nb-Ti碳氮化物時,應力作用下容易產生裂紋和孔隙,從而使鋼的熱塑性降低.
이용Gleeble 1500D열모의시험궤,대개발적Q370qE-HPS고성능교량강(/％:0.09C,0.36Si,1.33Mn,0.013P,0.004S,0.036Nb,0.015Ti,0.022Als,0.33CEV)230 mm×1 400 mm련주배진행700 ～1 050℃적열소성시험연구.결과표명,Q370qE-HPS고성능교량강800～ 1050℃위고소성구간,여전통정화공예교량강Q370qE(/％:0.14C,0.38Si,1.45Mn,0.012P,0.004S,0.028Nb,0.014Ti,0.023Als,0.38CEV)상비교,Q370qE-HPS강고소성적온도범위교대;700～ 800℃위저소성구간,재차구간연오씨체정계석출적철소체막사항랍강도강저,우기당정계처존재Nb-Ti탄담화물시,응력작용하용역산생렬문화공극,종이사강적열소성강저.
