ISSN：1003-8620

CN：42-1243/TF

主管：中信泰富特钢集团股份有限公司

主办：大冶特殊钢有限公司

特殊钢 ›› 2023, Vol. 44 ›› Issue (2): 12-16.DOI: 10.20057/j.1003-8620.2022-00094

• 试验研究 • 上一篇    下一篇

超级奥氏体不锈钢254SMo的均质化工艺研究

史咏鑫 1,2, 李 青1,2 , 钟庆元 1,2, 田 伟1,2 , 叶强1,2   

  1. 1. 中航上大高温合金材料股份有限公司，邢台 054800;
    2. 河北省特种合金再生工程技术研究中心，邢台 054800;
  • 收稿日期:2022-08-19 出版日期:2023-04-01 发布日期:2023-03-23
  • 作者简介:史咏鑫(1989-)，男，工程师，硕士；E-mail:shiyongxin198902@126.com

Study on Homogenization Process of Super Austenitic Stainless Steel 254SMo

Shi Yongxin1,2 , Li Qing1,2 , Zhong Qingyuan1,2 , Tian Wei1,2 , Ye Qiang1,2   

  1. 1. Avic Shangda Superalloys Company Limited, Xingtai 054800;
    2. Hebei Engineering Research Center for Special Alloy Regeneration, Xingtai 054800;
  • Received:2022-08-19 Published:2023-04-01 Online:2023-03-23

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摘要： 试验用超级奥氏体不锈钢254SMo(/%:0.011C,0.30Si,0.46Mn,20.25Cr,17.75Ni,6. 13Mo,0.64Cu,0.212N)采用20 t电弧炉+AOD+LF 精炼的工艺冶炼，研究了254SMo钢的铸态组织，发现枝晶间存在大量的析出相，其临近冒口钢锭头部中心的析出相尺寸最大，且呈网状分布。钢锭经1240℃ 8～40 h均质化处理后，锻造成 φ204 mm棒材，检验其析出相数量和点腐蚀速率。试验结果表明：随着均质化时间的延长，其析出相尺寸减小，数量减少，钢的点腐蚀性能提高；均质化12h+镦粗拔长+均质化12 h为最优均质化工艺。

关键词: 超级奥氏体不锈钢254SMo , 析出相 ；点腐蚀速率 ；均质化

Abstract: The tested super austenitic stainless steel 254SMo(/%:0.011C,0.30Si,0.46Mn,20.25Cr,17.75Ni,6.13Mo,0.64Cu,0.212N) is melted by 20 t electric arc furnace + AOD +LF refining,the as-cast microstructure of 254SMo steel has been studied. It is found that there are a large number of precipitates between dendrites,and the precipitates in the center of ingot head near hot top are the largest and distributed in a network. After homogenization treatment at 1240℃ for 8-40 h,the ingots are forged to φ204 mm bar,the quantity of precipitated phase and pitting corrosion rate are inspected. The experimental results show that with the prolongation of homogenization time,the size and quantity of precipitates decrease,and the pitting corrosion performanceof steel improves; Homogenization for 12 h + Upsetting and Stretching + homogenization for 12 h is the optimal homogenization process.

Key words: Super Austenitic Stainless Steel 254SMo , Precipitated Phase , Pitting Corrosion Rate , Homogenization

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