鈮微合金化對高Al冷軋TRIP鋼組織與力學性能的影響

徐錕; 劉國權

doi:10.13374/j.issn1001-053x.2009.10.013

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鈮微合金化對高Al冷軋TRIP鋼組織與力學性能的影響

doi: 10.13374/j.issn1001-053x.2009.10.013

徐錕¹,
劉國權^1,2

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 北京科技大學新金屬材料國家重點實驗室, 北京 100083

基金項目:

“十一五”配套研制項目(No.JPPT-115-2-712)

詳細信息

作者簡介:
徐錕(1978-),女,博士研究生;劉國權(1952-),男,教授,博士生導師,xk206@yahoo.com.cn

中圖分類號: TG142.1
計量
- 文章訪問數: 180
- HTML全文瀏覽量: 34
- PDF下載量: 8
- 被引次數: 0
出版歷程
- 收稿日期: 2009-01-17
- 網絡出版日期: 2021-08-09

Effect of Nb microalloying on the microstructure and mechanical properties of high-Al cold-rolled TRIP steel

XU Kun¹,
LIU Guo-quan^1,2

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 采用二段式鹽浴熱處理、金相顯微鏡(OM)、掃描電鏡(SEM)、X射線衍射(XRD)和拉伸實驗等方法,研究了添加0.025%微合金元素Nb對高Al(1.5%Al)冷軋相變誘導塑性鋼(TRIP)組織與性能的影響規律.結果表明:Nb微合金化使高Al冷軋TRIP鋼在連續退火后組織得到細化,殘余奧氏體含量及其碳含量比無Nb鋼均有所升高.含Nb鋼在370℃和400℃等溫后抗拉強度均大于650MPa,且總伸長率達到35%,具有優異的綜合力學性能.Nb微合金化,將本實驗所研究的高Al冷軋TRIP鋼的最優貝氏體區等溫溫度由400℃左右擴大到370~400℃,提高了生產的工藝穩定性.
- TRIP鋼 /
- 鈮 /
- 鋁 /
- 力學性能
Abstract: The effects of 0.025% Nb microalloying on the microstructure and mechanical properties of high-Al cold-rolled TRIP steel were investigated by means of two-stage salt bath heat treatment,optical microscopy(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD) and tensile test.The results indicate that the addition of Nb refines the microstructure after continuous annealing and increases the volume fraction and carbon content of retained austenite.The Nb-microalloyed high-Al TRIP steel treated at 370℃ or 400℃ has very excellent mechanical properties,the tensile strength is higher than 650 MPa and the total elongation is above 35%.The best isothermal bainitic transformation process of the Nb-alloyed TRIP steel is from 370℃ to 400℃,which is wider than that of the TRIP steel without Nb,at about 400℃.The consistency of the process is enhanced.
- TRIP steel /
- niobium /
- aluminum /
- mechanical properties