Qi Zhang, Guanghui Chen, Yuemeng Zhu, Zhengliang Xue, and Guang Xu, Effect of heating temperature and atmosphere on the element distribution and microstructure in a high-Mn high-Al austenitic low-density steel, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2867-y
Cite this article as:
Qi Zhang, Guanghui Chen, Yuemeng Zhu, Zhengliang Xue, and Guang Xu, Effect of heating temperature and atmosphere on the element distribution and microstructure in a high-Mn high-Al austenitic low-density steel, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2867-y
Research Article

Effect of heating temperature and atmosphere on the element distribution and microstructure in a high-Mn high-Al austenitic low-density steel

+ Author Affiliations
  • Received: 12 October 2023Revised: 20 February 2024Accepted: 26 February 2024Available online: 27 February 2024
  • The element distribution and microstructure near surface of a high-Mn high-Al austenitic low-density steel were investigated after isothermal holding at temperatures ranging from 900°C to 1200°C in different atmospheres, including air, N2 and N2 + CO2 mixed atmospheres. The results show that no ferrite formed near the surface of the experimental steel during isothermal holding at 900°C and 1000°C in air, while ferrite formed near the surface when the isothermal temperature reached 1100°C and 1200°C. The fraction of ferrite was larger at 1200°C because more C and Mn diffused to the surface and exuded from steel, which then reacted with N and O to form oxidation products. The thickness of compound scale increased due to the larger diffusion rate at a higher temperature. In addition, after isothermal holding at 1100°C in N2, Al content near the surface reduced slightly, while the contents of C and Mn did not change. Therefore, no ferrite formed near the surface. However, the contents of C and Al near the surface reduced after holding at 1100°C in N2 + CO2 mixed atmosphere, resulting in a small amount of ferrite. The thickness of compound scale was found to be the thickest in N2, followed by N2 + CO2 mixed atmosphere, and the thinnest in air. Overall, the element loss and ferrite fraction were the largest after holding in air at the same temperature. The differences in element loss and ferrite fraction were small in N2 and N2 + CO2 mixed atmospheres, but the compound scale formed in N2 was significantly thicker. Based on these results, the N2 + CO2 mixed atmosphere is the most ideal heating atmosphere for industrial production of high-Mn high-Al austenitic low-density steel.

  • loading
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Share Article

    Article Metrics

    Article Views(94) PDF Downloads(10) Cited by()
    Proportional views

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return