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首页> 外文期刊>ISIJ international >Effect of Prior Structure to Intercritical Annealing on Rapid Formation of Ultrafine Ferrite + Austenite Structure and Mechanical Properties in 0.1%C-2%Si-5%Mn Steels
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Effect of Prior Structure to Intercritical Annealing on Rapid Formation of Ultrafine Ferrite + Austenite Structure and Mechanical Properties in 0.1%C-2%Si-5%Mn Steels

机译：现有结构对跨临界退火的影响超细铁氧体+奥氏体结构的快速形成和0.1％C-2％Si-5％MN钢的机械性能

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摘要

Ultrafine ferrite + austenite steels with the chemical composition of 0.1%C-2%Si-5wt%Mn show excellent strength (TS = 1 200 MPa) and high ductility (TEI=25%) balance, compared to conventional TRIP steels. This steel is expected as the third generation advanced high-tensile strength steels (AHSS). This steel can be produced by a simple intercritical annealing, however, longer annealing time is necessary to obtain appropriate ferrite + austenite structure. It is difficult to produce this steel by continuous annealing process. If the annealing time can be drastically reduced, this new TRIP steels can be commercialized. We focused on the effect of the prior microstructures before annealing on the formation of ferrite + austenite structure. The effect of the prior structure is not clear. Therefore, in this study, two kind of prior structures, ultrafine grained ferrite + cementite and martensite were used in 0.1%C-2%Si-5wt%Mn steels. It was found that the prior structure of ferrite + cementite can form large amount (20%) of austenite in a very short time (600 s). This is because cementite finely dispersed in the structure effectively acts as a preferential nucleation site of reverse transformed austenite and C and Mn are concentrated in cementite to enable a short time formation of austenite. Excellent strength-ductility balance (32 000 MPa%) which is superior to conventional TRIP steels is also obtained.
机译：与常规跳闸钢相比，UttraFine铁氧体+奥氏体钢的化学成分为0.1％C-2％Si-5wt％Mn显示出优异的强度（TS = 1 200MPa）和高延展性（TEI = 25％）平衡。这种钢材预计是第三代先进的高抗拉强度钢（AHS）。该钢可以通过简单的跨临界退火生产，然而，需要更长的退火时间来获得适当的铁氧体+奥氏体结构。通过连续退火过程难以生产该钢。如果退火时间可以大幅减少，则可以将这种新的绊脚石商业化。我们专注于现年微观结构在退火之前的形成，形成铁氧体+奥氏体结构。现有结构的效果尚不清楚。因此，在本研究中，两种现有的结构，超细颗粒铁氧体+渗碳丁系特和马氏体用于0.1％C-2％Si-5wt％Mn钢。结果发现铁氧体+渗碳物的现有结构可以在很短的时间内（600秒）形成大量（20％）奥氏体。这是因为在结构中精细地分散的渗碳石有效起作用作为逆转变化的奥氏体的优先成核位点，C和Mn浓缩渗碳液中，以使奥氏体的短时间形成。还获得了优异的强度 - 延展性平衡（32000MPa％）优于传统跳闸钢。

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  • 来源
    《ISIJ international》 |2020年第4期|764-773|共10页
  • 作者

    Takanobu ADACHI; Atsushi ITO; Hiroki ADACHI; Shiro TORIZUKA;

  • 作者单位

    Department of Materials and Synchrotron Radiation Engineering The Graduate School of Engineering University of Hyogo 2167 Shosya Himeji Hyogo 671-2280 Japan;

    Department of Materials and Synchrotron Radiation Engineering The Graduate School of Engineering University of Hyogo 2167 Shosya Himeji Hyogo 671-2280 Japan;

    Department of Materials and Synchrotron Radiation Engineering The Graduate School of Engineering University of Hyogo 2167 Shosya Himeji Hyogo 671-2280 Japan;

    Department of Materials and Synchrotron Radiation Engineering The Graduate School of Engineering University of Hyogo 2167 Shosya Himeji Hyogo 671-2280 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    TRIP; ferrite; austenite; Mn; short time formation; prior structure; ferrite+cementite; martensite; strength; ductility; intercritical annealing; synchrotron radiation; in-situ XRD; tensile test;

    机译：旅行;铁氧体;奥氏体;Mn;短时间形成;现有结构;铁素体+渗碳石;马氏体;力量;延展性;跨临界退火;同步辐射;原位XRD;拉伸试验;

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