Al、Ni对1Cr9Al(1-3)Ni(1-7)WVNbB合金相变与性能的影响  

Effect of Al and Ni on Phase Transformation and Properties of 1Cr9Al(1-3)Ni(1-7)WVNbB Alloy

作　　者：赵嫚嫚 国栋[1,2] 秦森 冯捷[1] 代永娟[1] Zhao Manman;Guo Dong;Qin Sen;Feng Jie;Dai Yongjuan(College of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;College of Mechanical Engineering,Tianjin Vocational and Technical Normal University,Tianjin 300222,China)

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050018 [2]天津职业技术师范大学机械工程学院,天津300222

出　　处：《稀有金属材料与工程》2021年第8期2823-2830,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51774108,51874116,52074193)。

摘　　要：为了研究Al对铁素体耐热钢相变与性能的影响规律,通过在已有合金T92的成分基础上进行Al元素的添加及改性添加剂Ni的调整制备出了新型高铝铁素体耐热钢,研究了不同Al元素含量的加入及热处理工艺下铁素体耐热钢相变温度与淬火组织晶粒尺寸、硬度及抗氧化性的关系。结果表明,实验钢的平衡相变点随着Al元素含量的增加而升高,且实验钢的奥氏体晶粒尺寸越大,起始温度(Ac1)和终止温度(Ac3)越高;钢中添加的Al、Ni元素总量在2.4%(质量分数)时,淬火后的奥氏体晶粒尺寸最小,且硬度最大;在650℃环境下,钢中添加3%Al比添加1%Al的抗高温氧化性能强;在750℃环境下,钢中所含改性添加剂Ni起到了一定的作用,Al-Ni比越大,钢便表现出了较强的抗氧化性。To study the effect of Al on the phase transformation and properties of ferritic heat resistant steel,a new type of high aluminium ferritic heat resistant steel was prepared by adding Al element and adjusting additive Ni on the basis of T92 alloy composition.The relationship between the phase change temperature of ferritic heat resistant steel with different Al contents under heat treatment processes and quenching organization grain size,hardness and oxidation resistance was studied.The results show that the equilibrium phase transition point of the experimental steel increases with the increase of Al content,and the Ac1 and Ac3 temperature of the experimental steel becomes higher with the austenite grain size becoming larger.When the total amount of Al and Ni elements added in steel is 2.4 wt%,the grain size of austenite after quenching is the smallest and the hardness is the largest.Adding 3 wt%Al makes the steel has stronger high temperature oxidation resistance than adding 1 wt%Al at 650℃.At 750℃,the modified additive Ni plays a certain role.The larger the Al-Ni ratio,the stronger the oxidation resistance of the steel.

关 键 词：铁素体耐热钢 AL含量 平衡相变温度 晶粒尺寸 硬度 

分 类 号：TG142.13[一般工业技术—材料科学与工程] TG142.23[金属学及工艺—金属材料]