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Fe-Cr-Mn系超細(xì)晶奧氏體不銹鋼的形成機(jī)制及其組織與耐蝕性能研究
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1.西安工業(yè)大學(xué)材料與化工學(xué)院;2.西安交通大學(xué)金屬材料強(qiáng)度國(guó)家重點(diǎn)實(shí)驗(yàn)室

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國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51271143)


Study on formation mechanism, microstructure and corrosion resistance of Fe-Cr-Mn-based ultra-fine grain austenitic stainless steel
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1.Xi’an Technological University,Xi’an;2.State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an

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    摘要:

    采用高能研磨誘導(dǎo)的機(jī)械合金化方法制備了Fe-Cr-Mn系不銹鋼合金粉末；對(duì)MA合金粉末分別進(jìn)行了退火和熱壓燒結(jié),分析了過(guò)程中的相變規(guī)律,并對(duì)燒結(jié)獲得的奧氏體不銹鋼合金進(jìn)行了組織和耐蝕性能研究。結(jié)果表明：MA獲得的不銹鋼合金粉末由亞穩(wěn)態(tài)的納米晶鐵素體構(gòu)成；退火/熱壓燒結(jié)后,鐵素體逐漸轉(zhuǎn)變?yōu)闊崃W(xué)上更加穩(wěn)定的奧氏體,相變溫度介于650 °C到700 °C之間；對(duì)MA粉末在900 °C、200 MPa條件下熱壓燒結(jié)1 h,獲得的Fe-Cr-Mn系奧氏體不銹鋼平均晶粒尺寸為亞微米級(jí)且表現(xiàn)出高硬度和良好的耐蝕性能,其硬度值約為535 HV、極化電壓和極化電流分別為-0.28 V和1.43×10-9 A.cm-2。

    Abstract:

    Fe-Cr-Mn-based stainless steel alloy powder was prepared by mechanical alloying method, which is induced by high energy milling. The milled powders were respectively annealed and sintered via hot pressing sintering method, and the phases evolution, microstructure and corrosion resistance were respectively analysed. It is found that the Fe-Cr-Mn-based stainless steel alloy prepared by mechanical alloying is mainly composed of metastable nanocrystalline ferrite phase. After annealing or hot pressing sintering, ferrite phase will transform into austenite phase, and the transformation temperature range from 650 °C to 700 °C. The powder milled for 16 h is hot pressed at 900 °C and 200 MPa for 1 h for bulk alloy. The average grain size of pressed bulk alloy is submicron, which displays high hardness and good corrosion resistance. The hardness, polarization voltage and polarization current are respectively 535 HV, -0.28 V and 1.43×10-9 A.cm-2.

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孫崇鋒,黨曉鳳,席生岐,李建平,高圓,郭永春,楊忠,白亞平. Fe-Cr-Mn系超細(xì)晶奧氏體不銹鋼的形成機(jī)制及其組織與耐蝕性能研究[J].稀有金屬材料與工程,2021,50(2):600~606.[Chongfeng Sun, Xiaofeng Dang, Shengqi Xi, Jianping Li, Yuan Gao, Yongchun Guo, Zhong Yang, Yaping Bai. Study on formation mechanism, microstructure and corrosion resistance of Fe-Cr-Mn-based ultra-fine grain austenitic stainless steel[J]. Rare Metal Materials and Engineering,2021,50(2):600~606.]
DOI：10.12442/j. issn.1002-185X.20200411

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  • 收稿日期:2020-06-11
  • 最后修改日期:2020-08-02
  • 錄用日期:2020-08-04
  • 在線發(fā)布日期: 2021-03-09
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