T122耐热钢平衡相转变的热力学计算和分析

特殊钢 ›› 2005, Vol. 26 ›› Issue (6): 16-17.

T122耐热钢平衡相转变的热力学计算和分析

曹金荣,刘正东,程世长,杨钢,谢建新

北京科技大学材料科学与工程学院，北京100083;
钢铁研究总院结构材料研究所，北京100081

收稿日期:2005-06-08 出版日期:2005-11-08 发布日期:2023-04-11
作者简介:曹金荣(1965-),男，高级工程师，在读博士，从事高效超临界(超超临界)火电机组用关键钢铁材料方面的研究。工作单位;钢铁研究总院结构材料研究所，北京100081。
基金资助:
本研究课题为国家高技术发展计划(863项目)资助项目(AA2003331060)

Thermodynamic Calculation and Analysis on Equilibrium Phases Transition in T122 Heat-Resistant Steel

Cao Jinrong, Liu Zhengdong , Cheng Shichang, Yang Gang，Xie Jianxin

School of Materials Science and Engineering, University of Science and Technology, Beijing 100083;
Central Iron and Steel Research Institute, Beijing 100081

Received:2005-06-08 Published:2005-11-08 Online:2023-04-11

摘要/Abstract

摘要： 采用Thermo-Calc热力学计算软件,对820~1 200℃时T122高铬耐热钢(%:0.11~0.12C,11.37~11.97Cr,1.90~1.93W,0.38Mo,0.86~0.90Cu,0.05Nb,0.19~0.20V,0.58~0.67N,0.002 3~0.002 8B)在820~1 200℃的热力学平衡相及合金元素Cr、Al、Ti对δ铁素体和主要析出相的影响进行了研究。结果表明,T122耐热钢残留有较多的δ铁素体,其主要析出相为M₂₃C₆、Laves和MX。在950~1 050℃时δ铁素体最少,其含量为15.7%18.9%。M₂₃C₆析出开始温度为940℃,Laves相为750℃,MX则较稳定为>1 250℃。Cr对δ铁素体含量影响很大,但对析出相影响较小。降低Al、Ti有助于降低δ铁素体含量,增加MX含量。

关键词: T122高铬耐热钢, Theimo-Calc软件, δ铁素体, 析出相

Abstract: The thermodynamic equilibrium phases in T122 heat-resistant steel (0.11 ~ 0.12C, 11.37 ~ 11.97Cr, 1.90〜1.93W, 0.38Mo, 0.86 〜0.90Cu, 0.05Nb, 0.19- 0.20V, 0.58- 0.67N, 0.002 3 〜0.002 8B) and the effect of alloying element Cr, Al, Ti on S ferrite and major precipitated phases at temperature between 820 °C and 1 200 °C have been studied by Thermo-Calc software. The results show that there is a large amount of S ferrite in T122 heat-resistant steel and the main precipitated phases in steel are ， Laves phase and MX, At temperature between 950 °C and 1 050 °C the amount of S phase is lowest, of which the content is 15.7% ~ 18.9% .The initial precipitated temperature for M₂₃C₆ is 940 °C , for Laves phase is 750 °C , but for MX is more than 1 250 °C which is a very stable phase. It is found that chromium has a great influence on formation of 8 ferrite and has minor influence on that of precipitated phases; to lower Al and Ti content is available to decrease 3 ferrite amount and increase MX phase amount.

曹金荣, 刘正东, 程世长, 杨钢, 谢建新. T122耐热钢平衡相转变的热力学计算和分析[J]. 特殊钢, 2005, 26(6): 16-17.

Cao Jinrong, Liu Zhengdong , Cheng Shichang, Yang Gang, Xie Jianxin. Thermodynamic Calculation and Analysis on Equilibrium Phases Transition in T122 Heat-Resistant Steel[J]. Special Steel, 2005, 26(6): 16-17.

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