Abstract:High-aluminum ferritic heat-resistant stainless steel as a new type of low-cost structural material is mainly used in the supercritical and ultra-supercritical thermal power generation.In order to clarify the mechanism of the effect of Al on the steel property,Al mass percent based on X10CrAlSi18 steel and obtained two different compositions of ferritic heat-resistant stainless steel was optimized. The microstructure was characterized by means of metallographic microscope (OM) and scanning electron microscope (SEM),and its mechanical properties were measured by hardness test and tensile test. The experimental results show that the increase of Al mass percent facilitates the recrystallization process and grain refinement.The Al element reduces the diffusion rate of carbon and inhibits the precipitation and aggregation of carbides. Besides that,with the increase of Al mass percent,the tensile strength,yield strength,and hardness of the material are improved,and the elongation is decreased.
魏统宇, 邹德宁, 张英波, 陈婉婉. 铝对高铝铁素体耐热钢组织与性能的影响[J]. 钢铁, 2020, 55(6): 80-83.
WEI Tong-yu, ZOU De-ning, ZHANG Ying-bo, CHEN Wan-wan. Effect of aluminum on microstructure and properties of high alumina ferritic heat resistant steel. Iron and Steel, 2020, 55(6): 80-83.
[1] Abe Fujio. Research and development of heat-resistant materials for advanced USC power plants with steam temperatures of 700 ℃ and above[J]. Engineering,2015,1(2):211. [2] 林富生,王治政,王宝忠,等.中国电站用耐热钢及合金的研制、应用与发展[J].动力工程学报,2010,30(4):235.(LIN Fu-sheng,WANG Zhi-zheng,WANG Bao-zhong,et al. Development,application and development of heat-resistant steels and alloys for power stations in China[J]. Journal of Power Engineering,2010,30(4):235.) [3] 周荣灿,范长信.超超临界火电机组材料研究及选材分析[J]. 中国电力,2005,38(8):41.(ZHOU Rong-can,FAN Chang-xin. Research and material selection analysis of ultra-supercritical thermal power unit materials[J].China Electric Power,2005,38(8):41.) [4] Paul V T,Saroja S,Vijayalakshmi M. Microstructural stability of modified 9Cr-1Mo steel during long term exposures at elevated temperatures[J]. Journal of Nuclear Materials,2008,378(3):273. [5] 宁保群,刘永长,乔志霞,等. 应力对T91铁素体耐热钢低温相变过程的影响[J]. 钢铁,2007,42(9):71.(NING Bao-qun,LIU Yong-chang,QIAO Zhi-xia,et al. Effect of stress on low temperature phase transformation of T91 ferritic heat resistant steel[J]. Iron and Steel,2007,42(9):71.) [6] 张敏娟,郑宏光,张小农,等. 铝对铁素体不锈钢的组织和力学性能的影响[J]. 热加工工艺,2011(20):54.(ZHANG Min-juan,ZHENG Hong-guang,ZHANG Xiao-nong,et al. Effect of aluminum on microstructure and mechanical properties of ferritic stainless steel[J]. Thermal Process Technology,2011(20):54.) [7] 刘辉. 热轧高铝310S耐热钢的组织和性能及铝元素的作用机制[D]. 兰州:兰州理工大学,2012.(LIU Hui. Microstructure and Properties of Hot-Rolled High-Alumina 310S Heat-Resistant Steel and the Mechanism of Action of Aluminum[D]. Lanzhou:Lanzhou University of Technology,2012.) [8] 胡平. 超(超)临界火电机组锅炉材料的发展[J]. 电力建设,2005,26(6):26.(HU Ping. Development of boiler materials for ultra (super) critical thermal power units[J]. Electric Power Construction,2005,26(6):26.) [9] 李秋鹤,王刚,陈礼清. 轧制方式对SUS430铁素体不锈钢组织和性能的影响[J]. 钢铁,2016,51(10):41.(LI Qiu-he,WANG Gang,CHEN Li-qing. Effect of rolling method on microstructure and properties of SUS430 ferritic stainless steel[J]. Iron and Steel,2016,51(10):41.) [10] 王振,刘建华,余晓艳. La、Ti处理对FeCrAl不锈钢凝固组织的影响[J]. 钢铁钒钛,2013(3):101.(WANG Zhen,LIU Jian-hua,YU Xiao-yan. Effect of La and Ti treatments on solidification structure of FeCrAl stainless steel[J]. Steel Iron Vanadium Titanium,2013(3):101.) [11] 石淑琴,谷南驹,古原忠,等. 铝元素抑制超高碳钢中网状碳化物析出机理[J]. 材料热处理学报,2005,26(4):79.(SHI Shu-qin,GU Nan-ju,GU Yuan-zhong,et al. Mechanism of aluminum element inhibiting the precipitation of reticulated carbides in ultra-high carbon steels[J]. Journal of Materials Heat Treatment,2005,26(4):79.) [12] 姜延飞,王宝奇,宋晓艳,等. 铝合金化对超高碳钢先共析碳化物析出行为的影响[J]. 热加工工艺,2005(2):1.(JIANG Yan-fei,WANG Bao-qi,SONG Xiao-yan,et al. Effect of aluminum alloying on precipitation behavior of pre-eutectoid carbide in ultra-high carbon steel[J]. Thermal Engineering,2005(2):1.) [13] 李江.钢铁材料的晶粒细化研究[J].钢铁技术,2007(2):29.(LI Jiang. Research on grain refinement of steel materials[J]. Steel Technology,2007(2):29.) [14] Jin J E,Lee Y K. Effects of Al on microstructure and tensile properties of C-bearing high Mn TWIP steel[J]. Acta Materialia,2012,60(4):1680. [15] 刘奎. 退火态12Cr13不锈钢显微组织及其对冲击韧性的影响[J]. 金属学报,2011,47(7):912.(LIU Kui. Microstructure of annealed 12Cr13 stainless steel and its effect on impact toughness[J]. Journal of Metals,2011,47(7):912.)