热轧工艺对高铝铁素体耐热不锈钢组织性能的影响  

Effect of hot rolling process on microstructure and properties of ferritic heat- resistant stainless steel with high aluminum content

作　　者：李阳[1,2] 王琦 张威[1,2] 曾莉[1,2] LI Yang;WANG Qi;ZHANG Wei;ZENG Li(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron and Steel(Group)Co.,Ltd.,Taiyuan 030003,China;Technology Center of Shanxi Taigang Stainless Steel Co.,Ltd,Taiyuan 030003,China)

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003 [2]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《轧钢》2020年第2期23-25,45,共4页Steel Rolling

基　　金：山西省科技重大专项资助项目(20181101016)。

摘　　要：电站锅炉的连接件需具有优良的抗高温氧化性、冲击韧性和塑性,主要采用铁素体耐热不锈钢0.1C-18Cr-1Al-1Si制造,热轧工艺对其塑韧性能有至关重要的影响。采用热轧试验,研究了不同热轧工艺对铁素体耐热不锈钢0.1C-18Cr-1Al-1Si组织性能的影响规律。结果表明,热轧温度为700℃时,0.1C-18Cr-1Al-1Si热轧板的再结晶最充分;横纵轧和纵轧不同轧制方式下0.1C-18Cr-1Al-1Si板材小角度晶界比例均较高,边部小角度晶界出现频率更高;采用横纵轧工艺可以明显减轻0.1C-18Cr-1Al-1Si板材力学性能的各向异性。The connection parts of power station boilers need to have excellent high temperature oxidation resistance,impact toughness and plasticity,which are mainly manufactured by ferritic heat-resistant stainless steel 0.1 C-18 Cr-1 Al-1 Si plate.Its plasticity and toughess are mainy affected by hot rolling praess.Through hot rolling test,the effects of different hot rolling processes on the microstructure and properties of ferritic heat-resistant stainless steel 0.1 C-18 Cr-1 Al-1 Si were studied.The results show that the recrystallization of 0.1 C-18 Cr-1 Al-1 Si plate is the most sufficient at hot rolling temperature of 700 ℃.The proportions of small angle grain boundaries of 0.1 C-18 Cr-1 Al-1 Si plate are higher under cross-longitudinal rolling and longitudinal rolling modes,and the frequency of small angle grain boundaries at edges is higher.The anisotropy of mechanical properties of 0.1 C-18 Cr-1 Al-1 Si hot rolled plate can be significantly reduced by cross-longitudinal rolling.

关 键 词：铁素体耐热不锈钢 横纵轧 纵轧 开轧温度 组织 性能 

分 类 号：TG335.11[金属学及工艺—金属压力加工] TG142.71[一般工业技术—材料科学与工程]