Study on the Influence of Vanadium on S30432 Austenitic Heat-resisting Steel
TU Youwang1, ZHU Lihui1, KE Zhigang1, ZHOU Renyuan1, SONG Ming2
1 School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China 2 China Special Equipment Inspection and Research Institute, Beijing 100029, China
Abstract: The effect of 0.18% V addition on S30432 austenitic heat-resistant steel was studied in this paper. Creep rupture time at 650 ℃ and hardness before and after crept at 650 ℃ of V-free and V-containing steels were compared. OM, SEM, TEM and Thermo-Calc software were used to study the influence of 0.18% V on the precipitates in S30432 steel. The mechanism of improving strength of V-containing S30432 heat-resistant steel was also analyzed. The results show that the addition of 0.18% V to S30432 steel leads in the increase of creep rupture time at 650 ℃ and hardness. Not only the grains become finer, but also there are more secondary MX particles in V-containing S30432. In particular, a large number of fine Z-phase(Cr(Nb,V)N) precipitate in V-containing S30432 steel. Because the solution temperature of V(C,N) is lower than Nb(C,N), the addition of V accelerates the dissolution of more MX and promotes the precipitation of fine Z-phase in V-containing S30432 steel. The precipitation strengthening of Z-phase is the main reason to improve the hardness and strength of V-containing S30432 steel.
作者简介: 涂有旺,上海大学硕士研究生,主要从事耐热钢组织和性能方面的研究。 朱丽慧,上海大学教授,博士研究生导师。1998年毕业于西安交通大学,获博士学位。主要从事超临界、超超临界锅炉用耐热钢、硬质合金刀具涂层等相关领域的研究。近三年在Metallurgical and Materials Transactions A, Materials Science and Engineering A, Surface & Coatings Technology等期刊发表学术论文20余篇,申请发明专利1项。与他人合著出版专著《超临界锅炉耐热钢研究》(第二作者,机械工业出版社)。以上海大学第一课题负责人参与完成的“锅炉长周期安全高效运行关键技术及其应用”项目荣获“教育部科学技术进步奖一等奖”(证书号2011-165)。
引用本文:
涂有旺, 朱丽慧, 柯志刚, 周任远, 宋明. 钒的添加对S30432奥氏体耐热钢影响的研究[J]. 材料导报, 2021, 35(20): 20113-20118.
TU Youwang, ZHU Lihui, KE Zhigang, ZHOU Renyuan, SONG Ming. Study on the Influence of Vanadium on S30432 Austenitic Heat-resisting Steel. Materials Reports, 2021, 35(20): 20113-20118.
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2021, Vol. 35 
