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Mg對(duì)S44660超級(jí)鐵素體不銹鋼鑄造組織及力學(xué)性能的影響
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作者單位:

1.沈陽(yáng)工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，遼寧 沈陽(yáng) 110870;2.中國(guó)科學(xué)院金屬研究所，遼寧 沈陽(yáng) 110016;3.空裝駐沈陽(yáng)地區(qū)第三軍事代表室，遼寧 沈陽(yáng) 110016

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中圖分類號(hào):

TG142.71

基金項(xiàng)目:

國(guó)家重點(diǎn)研發(fā)計(jì)劃（2021YFC2202402）


Effect of Mg on Cast Microstructure and Mechanical Properties of S44660 Super Ferritic Stainless Steel
Author:
Affiliation:

1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;2.Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, China;3.The Third Military Representative Office of Air Equipment in Shenyang, Shenyang 110016, China

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    摘要:

    為研究Mg對(duì)超級(jí)鐵素體不銹鋼的作用，調(diào)整S44660鋼Mg含量，制備未添加Mg及Mg質(zhì)量分?jǐn)?shù)為0.0002%、0.0004%、0.0010%的4種成分試驗(yàn)鋼，探究Mg對(duì)S44660超級(jí)鐵素體不銹鋼鑄造組織與力學(xué)性能影響。結(jié)果表明，0.0002% Mg S44660超級(jí)鐵素體不銹鋼平均晶粒尺寸由1.14 mm減小至約0.83 mm，隨著Mg含量進(jìn)一步提高至0.0004%和0.0010%，平均晶粒尺寸減小至0.62、0.59 mm左右，Mg對(duì)S44660鋼晶粒有細(xì)化作用；S44660超級(jí)鐵素體不銹鋼典型夾雜物類型為 Ti-O-N復(fù)合包裹型夾雜物，加入Mg后轉(zhuǎn)變?yōu)門i-O-Al-Mg-N復(fù)合包裹型夾雜物，夾雜物含量降低，同時(shí)尺寸減??；添加Mg后S44660超級(jí)鐵素體不銹鋼屈服強(qiáng)度和抗拉強(qiáng)度提高；Mg可以提高S44660超級(jí)鐵素體不銹鋼沖擊吸收功及硬度。

    Abstract:

    To study the effect of Mg on super ferritic stainless steel, the content of Mg in S44660 super ferritic stainless steel was adjusted, and four kinds of test steels without Mg and with Mg additions of 0.0002%, 0.0004% and 0.0010% (mass fraction) were prepared. The effects of Mg on the cast microstructure and mechanical properties of S44660 super ferritic stainless steel were studied. The results show that the average grain size of the steel decreases from 1.14 mm to about 0.83 mm after 0.0002% Mg is added, and with the further increase in Mg content to 0.0004% and 0.0010%, the average grain size decreases to about 0.62 and 0.59 mm. It is confirmed that Mg can refine the grain of S44660 steel. Typical inclusion type of the S44660 steel is Ti-O-N composite inclusion, while it changes into Ti-O-Al-Mg-N composite inclusion after adding Mg, and the inclusion content and size decrease at the same time. The yield strength and tensile strength of the steel increase after adding Mg. Therefore, Mg can improve the impact absorption energy and hardness of S44660 super ferritic stainless steel.

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范文杰,寧禮奎,常東旭,丁冬,李廣龍,劉恩澤,譚政,佟健,李海英,鄭志.Mg對(duì)S44660超級(jí)鐵素體不銹鋼鑄造組織及力學(xué)性能的影響[J].稀有金屬材料與工程,2025,54(3):747~754.[Fan Wenjie, Ning Likui, Chang Dongxu, Ding Dong, Li Guanglong, Liu Enze, Tan Zheng, Tong Jian, Li Haiying, Zheng Zhi. Effect of Mg on Cast Microstructure and Mechanical Properties of S44660 Super Ferritic Stainless Steel[J]. Rare Metal Materials and Engineering,2025,54(3):747~754.]
DOI：10.12442/j. issn.1002-185X.20230724

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  • 收稿日期:2023-11-14
  • 最后修改日期:2023-12-11
  • 錄用日期:2024-01-05
  • 在線發(fā)布日期: 2025-03-25
  • 出版日期: 2025-03-25