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馬氏體鋼中(Ti,Mo)C粒子的析出行為和強(qiáng)化效應(yīng)
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作者單位:

1.鋼鐵研究總院特鋼所;2.清華大學(xué)

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基金項(xiàng)目:

國(guó)家重點(diǎn)研究與發(fā)展計(jì)劃 No. 2016YFB0300104 ; No. 2016YFB0300102 ; No.2017YFB0304802


Precipitation behavior and strengthening effect of (Ti,Mo)C particles in a martensitic steel
Author:
Affiliation:

Institute for Special Steels, Central Iron and Steel Research Institute (CISRI)

Fund Project:

National Key Research and Development Program No. 2016YFB0300104 ; No. 2016YFB0300102 ; No.2017YFB0304802.

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    摘要:

    為了研究復(fù)合(Ti,Mo)C粒子的析出行為和強(qiáng)化效應(yīng)，本文選取了一種含鈦的Cr-Mo鋼作為研究對(duì)象，對(duì)此鋼分別進(jìn)行880 ℃和1350 ℃淬火并回火?；瘜W(xué)萃取相分析結(jié)果表明，當(dāng)淬火溫度為880 ℃時(shí)，(Ti,Mo)C粒子的尺寸主要分布在18-36，36-60，60-96 nm，這些粒子是在熱軋過(guò)程中析出的。當(dāng)淬火溫度為1350 ℃時(shí)，回火過(guò)程中新析出了1-5 nm的(Ti,Mo)C粒子，這些新析出的(Ti,Mo)C粒子產(chǎn)生了一個(gè)明顯的二次硬化平臺(tái)，析出強(qiáng)化量約為165 MPa。新析出的(Ti,Mo)C粒子中的Ti/Mo原子比隨回火溫度的升高而降低并穩(wěn)定在1左右。

    Abstract:

    To study the precipitation behavior and strengthening effect of (Ti,Mo)C particles, one Cr-MoSsteel with added Ti was austenitized at 880 ℃ and 1350 ℃ followed by oil quenching and tempering. The chemical extraction phase analysis results showed that some (Ti,Mo)C particles were found to have size distributions within the range of 18–36 nm, 36–60 nm, and 60–96 nm when the steel was austenitized at 880 ℃ and particles were precipitated during hot rolling. When the austenitized temperature was 1350 ℃, some new (Ti,Mo)C particles appeared with sizes ranging from 1–5 nm, precipitated during tempering. These (Ti,Mo)C particles demonstrated a distinct secondary hardening platform with a strengthening increment of approximately 165 MPa. The atomic ratio of Ti/Mo in the (Ti,Mo)C particles precipitated during tempering decreased to approximately 1 as the tempering temperature increased.

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靳曉坤,徐樂(lè),姚可夫,時(shí)捷,王毛球.馬氏體鋼中(Ti, Mo)C粒子的析出行為和強(qiáng)化效應(yīng)[J].稀有金屬材料與工程,2020,49(1):75~84.[Xiaokun Jin, Le Xu, Kefu Yao, Jie Shi, Maoqiu Wang. Precipitation behavior and strengthening effect of (Ti, Mo)C particles in a martensitic steel[J]. Rare Metal Materials and Engineering,2020,49(1):75~84.]
DOI：10.12442/j. issn.1002-185X.20180856

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  • 收稿日期:2018-08-10
  • 最后修改日期:2018-10-11
  • 錄用日期:2018-11-08
  • 在線發(fā)布日期: 2020-02-16
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