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過量的Fe2O3對鋁熱法制備微納結(jié)構(gòu)316L奧氏體不銹鋼組織和拉伸性能的影響
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蘭州理工大學(xué)

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國家自然基金Grant No. 51561020


Effect of Excess Fe2O3 in Reactions on Microstructure and Tensile Properties of Micro-nano Structure 316L Austenitic Stainless Steels Prepared by Aluminothermic Method
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State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology

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    摘要:

    不銹鋼結(jié)構(gòu)和成分的調(diào)節(jié)對其獲得良好綜合性能至關(guān)重要。本文為了使鋁熱反應(yīng)完全，降低316L ASSs中殘余Al的含量，在反應(yīng)粉體中加入了不同過量比的Fe2O3粉末，詳細(xì)分析了過量Fe2O3對316L奧氏體不銹鋼微納米組織和拉伸性能的影響。結(jié)果表明，隨著Fe2O3過量百分比的增加，鐵素體相的體積分?jǐn)?shù)顯著降低，而納米晶的體積分?jǐn)?shù)由87.4%提高到了93.4%，平均晶粒尺寸由32 nm降低到了22 nm。對比分析表明，鋁熱法制備316L ASSs的最佳工藝參數(shù)為添加過量比5.0 %的Fe2O3，在該條件下制備的單相奧氏體鋼，其抗拉強(qiáng)度為573.92 MPa，屈服強(qiáng)度為340.12 MPa，延伸率約為4.68%。

    Abstract:

    The regulation of structure and composition is very important for obtaining stainless steel with good comprehensive properties. In present paper, Fe2O3 powers with different excess ratios were added in reaction powders to make aluminothermic reaction completely and reduce the content of Al in the 316L ASSs. The effects of excess Fe2O3 in reactions on microstructure and tensile properties of micro-nano structure of 316L austenitic stainless steels were analyzed in detail. The results showed that, with the increase of Fe2O3 excess percentage, the volume fraction of ferrite phase reduced significantly while the volume fraction of nanocrystalline increased from 87.4 % to 93.4 % and the average grain size decreased from 32 nm to 22 nm. The comparative analysis showed that the Fe2O3 excess percentage of 5.0 % was the best process parameter for the 316L ASSs preparation by the aluminothermic method. For the single phase austenitic steel prepared under this condition, the tensile strength was 573.92 MPa, the yield strength was 340.12 MPa, and the elongation was about 4.68 %.

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王嬌,鄭月紅,魏瑩,喇培清,袁覓文,石玉.過量的Fe2O3對鋁熱法制備微納結(jié)構(gòu)316L奧氏體不銹鋼組織和拉伸性能的影響[J].稀有金屬材料與工程,2021,50(2):443~450.[Jiao Wang, Yuehong Zheng, Ying Wei, Peiqing La, Miwen Yuan, Yu Shi. Effect of Excess Fe2O3 in Reactions on Microstructure and Tensile Properties of Micro-nano Structure 316L Austenitic Stainless Steels Prepared by Aluminothermic Method[J]. Rare Metal Materials and Engineering,2021,50(2):443~450.]
DOI：10.12442/j. issn.1002-185X.20200002

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  • 收稿日期:2020-01-02
  • 最后修改日期:2020-06-08
  • 錄用日期:2020-06-09
  • 在線發(fā)布日期: 2021-03-09
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