A Study on Thermal-Fatigue Behavior of Super Ferrite Stainless Steels

谷宇; 张晶晶; 张保亮

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A Study on Thermal-Fatigue Behavior of Super Ferrite Stainless Steels

更新时间：2026-01-21

- A Study on Thermal-Fatigue Behavior of Super Ferrite Stainless Steels
- Special Steel Vol. 35, Issue 1, Pages: 65-67(2014)
- 作者机构：
  
  1. 山西太钢不锈钢股份有限公司1炼钢二厂
  2. 技术中心,太原,030003
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：26 August 2013，
  
  Online First：06 September 2022，
  
  Published：06 September 2014
- 稿件说明：
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谷宇, 张晶晶, 张保亮. A Study on Thermal-Fatigue Behavior of Super Ferrite Stainless Steels[J]. Special Steel, 2014, 35(1): 65-67.
DOI：

谷宇, 张晶晶, 张保亮. A Study on Thermal-Fatigue Behavior of Super Ferrite Stainless Steels[J]. Special Steel, 2014, 35(1): 65-67. DOI：

摘要

研究了预处理铁水-90 t K OBM S-VOD-LF-板坯CC流程生产的1.5 mm冷轧超纯铁素体不锈钢409、429和441板材室温-1 000℃800次循环的热疲劳性能。结果表明

429钢(/%:0.009C

0.86Si

15.3Cr

0.47Nb)和441钢(/%:0.008C

0.45Si

17.9Cr

0.39Nb

0.18Ti)的热疲劳(800次循环的裂纹长度1.2 mm)明显优于409钢(/%:0.007C

0.40Si

11.2Cr

0.14Nb

0.10Ti)的热疲劳(800次循环的裂纹长度2.0 mm);在室温-1 000℃的冷热交替过程中钢的薄弱部位Fe元素会首先形成氧化物并剥落

从而产生裂纹。裂纹附近表面形成Fe

SiO

·Cr

复合氧化膜

阻碍裂纹进一步扩展。

Abstract

The thermal-fatigue behavior with 800 cycles of ambient-1 000℃ for 1. 5 mm cold-rolled sheet of 409

429 and 441 super ferrite stainless steels produced by pre-treaded metal-90 t K OBM S-VOD-LF-slab CC flow sheet for auto exhaust pipeline has been studied. Results show that the thermal-fatigue (crack length with 800 cycles- 1. 2mm) of steel 429 (/%: 0. 009C

0. 86Si

15. 3Cr

0.47Nb) and steel 441 (/%: 0. 008C

0.45Si

17. 9Cr

0. 39Nb

0. 18Ti) is better than the thermal-fatigue (crack length with 800 cycles- 2. 0 mm) of steel 409 (/% : 0. 007C

0. 40Si

11. 2Cr

0. 14Nb

0.10Ti) ； during reversing ambient-1 000 °C heating-cooling process

the Fe atoms in weak region of steel are first oxidized to form oxides and peel off from base metal

led to form crack

and the formed Fe

SiO

• Cr

oxide films near crack prevent crack further developing.

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