李潇欢,崔国伟,陈思含,梁田,邢炜伟,马颖澈,王平,吴进明,李国斌.硅对高硅奥氏体不锈钢析出相的影响[J].稀有金属材料与工程,2022,51(8):2769~2776.[Xiaohuan Li,Guowei Cui,Sihan Chen,Tian Liang,Weiwei Xing,Yingche Ma,Ping Wang,JinMing Wu,Guobin Li.Effect of Silicon on Precipitates of High-Silicon Austenitic Stainless Steel[J].Rare Metal Materials and Engineering,2022,51(8):2769~2776.]
硅对高硅奥氏体不锈钢析出相的影响
投稿时间:2021-07-07  修订日期:2022-07-19
中文关键词:  高硅奥氏体不锈钢  硅含量  σ  显微硬度测试  Cr3Ni5Si2
基金项目:Postdoctoral Research Funding Project of Zhejiang Province (ZJ2020017)
中文摘要:
      采用XRD、TEM和压痕变形等方法研究了Si含量(4%~8%,质量分数)对高硅奥氏体不锈钢(ZeCorn)显微组织的影响。结果表明,Si含量的增加会导致ZeCor合金的相组成发生变化:ZeCor-4%Si合金组织为单相奥氏体(γ相),ZeCor-6%Si合金主要含γ相和少量σ相,在ZeCor-8%Si合金中主要析出Cr3Ni5Si2相和少量σ相。此外,Cr3Ni5Si2σ相相比具有更高的硅、镍含量。显微硬度HV高达7840 MPa的Cr3Ni5Si2相是典型的硬脆相,该相的析出将大大提高ZeCor-8%Si合金中γ基体的显微硬度。ZeCor合金中γ基体的强化机制如下:固溶强化是ZeCor-6%Si合金的主要强化机制,而Si的固溶强化和Cr3Ni5Si2的析出强化机制都大大提高ZeCor-8%Si合金中的γ基体的显微硬度。在ZeCor-8%Si合金中,Cr3Ni5Si2相起显著作用。
Effect of Silicon on Precipitates of High-Silicon Austenitic Stainless Steel
英文关键词:high-silicon austenitic stainless steel  silicon content  σ-phase  micro-hardness tester  Cr3Ni5Si2 phase
英文摘要:
      The effect of silicon contents (4wt%~8wt%) on microstructure of high-silicon austenitic stainless steel ZeCor was investigated by XRD, TEM and indentation deformation. Results show that increasing Si content leads to the phase constitute change of ZeCor alloy: the microstructure is single-phase austenite (γ phase) in ZeCor-4wt%Si alloy, γ phase with a small quantity of σ-phase in ZeCor-6wt%Si alloy, and as for the ZeCor-8wt%Si alloy, the main precipitations are Cr3Ni5Si2 phase and a bit σ-phases. In addition, the Cr3Ni5Si2 phase has a higher silicon and nickel content than the σ-phase. The Cr3Ni5Si2 phase with a micro-hardness HV as high as 7840 MPa is a typical hard and brittle phase, and the precipitation of such phase can greatly increase the micro-hardness of the γ matrix in the ZeCor-8wt%Si alloy. The strengthening mechanism of γ matrix in ZeCor alloy is as follows: the solid solution strengthening is the main strengthening mechanism in ZeCor-6wt%Si alloy, while the solid solution strengthening of Si and the precipitation strengthening of Cr3Ni5Si2 greatly increase the micro-hardness of the γ matrix in ZeCor-8wt%Si alloy, and the Cr3Ni5Si2 phases have a great effect.
作者单位E-mail
李潇欢 东北大学 1900537@stu.neu.edu.cn 
崔国伟 东北大学  
陈思含 中国科学院金属研究所  
梁田   
邢炜伟 中国科学院金属研究所  
马颖澈 中国科学院金属研究所  
王平 东北大学  
吴进明 浙江大学  
李国斌 浙江信得达特种管业有限公司  
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