Thermodynamic Calculation and Analysis on Precipitated Phases in Heat-Resistant Steel T91

郝珊; 李国忠; 王福明; 李长荣

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Thermodynamic Calculation and Analysis on Precipitated Phases in Heat-Resistant Steel T91

更新时间：2026-01-21

- Thermodynamic Calculation and Analysis on Precipitated Phases in Heat-Resistant Steel T91
- Special Steel Vol. 29, Issue 3, Pages: 16-18(2008)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 江阴兴澄特种钢铁有限公司，江阴,214429
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：09 November 2007，
  
  Online First：21 December 2022，
  
  Published：21 December 2008
- 稿件说明：
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郝珊, 李国忠, 王福明, et al. Thermodynamic Calculation and Analysis on Precipitated Phases in Heat-Resistant Steel T91[J]. Special Steel, 2008, 29(3): 16-18.
DOI：

郝珊, 李国忠, 王福明, et al. Thermodynamic Calculation and Analysis on Precipitated Phases in Heat-Resistant Steel T91[J]. Special Steel, 2008, 29(3): 16-18. DOI：

摘要

采用Thermo-Calc热力学计算软件

对191耐热钢(%:0.09C、8.57Cr、0.90Mo、0.19V、0.08Nb、0.04N)600～1600℃存在的平衡相M

和MX进行了热力学计算。结果表明

T91钢600～1600℃主要平衡析出相为M23C6和MX

开始析出温度860℃

MX为1200℃。MX相中首先析出富Nb碳氮化物

随后析出富V碳氮化物。随钢中Nb、V、N含量的提高

MX的数量和平衡开始析出温度均有提高

其中N的影响最为显著。

Abstract

The equilibrium phases M

and MX existing in heat-resistant steel T91 (0.09C

8. 57Cr

0.90Mo

0.19V

0. 08Nb

0.04N) at 600 ~ 1 600 °C have been calculated by Thermo-Calc calculation software. Results show that the main equilibrium precipitated phases in steel T91 at 600 ~ 1 600 ℃ are M23C6 and MX

the initial precipitation temperature for M

is 860 °C and that for MX is 1 200℃ . In MX phase the rich Nb carbonitrides first precipitate then the rich V carbonitrides precipitate. With increasing Nb

V or N

the amount of MX and its equilibrium initial precipitated temperature increases

in which the effect of N is most obvious.

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