1) deformation induced ferrite transformation
形变诱导铁素体相变
1.
A series of unidirectional compression tests of a low carbon steel Q235 were performed on a Gleeble 3500 thermal simulator, and the influences of strain, strain rate and deformation temperature (above the isothermal transformation temperature Ae3 from austenite to ferrite) on deformation induced ferrite transformation (DIFT) have been examined.
通过对低碳钢Q235的单向压缩实验,研究了应变、应变速率和变形温度(高于奥氏体铁素体平衡转变温度Ae3)对形变诱导铁素体相变的影响,通过光学显微镜、扫描电子显微镜和X射线衍射仪研究了热变形试样的微观组织结构,利用纳米压痕仪测定了形变诱导铁素体和先共析铁素体的纳米压痕硬度和弹性模量。
2.
In order to investigate the carbon diffusion during the deformation induced ferrite transformation, the electron probe microanalysis technique was used to measure the carbon concentration distribution in the microstructure of the specimen which experienced a hot compression process on the thermomechanical simulator (Gleeble 1500).
这表明在形变诱导铁素体相变过程中,碳没有发生明显的从铁素体向奥氏体扩散。
2) deformation induced ferrite transformation(DIFT)
形变诱导铁素体相变
1.
The microstructure evolution,precipitation behavior of carbonitride as microalloying element and its effects on deformation induced ferrite transformation(DIFT) of mild steels with various Nb,V(N) content were investigated on a Gleeble 1500 thermechanical simulator through multi-pass thermo-compression in the temperature range of 820～790℃ to simulate the finish rolling process of plates.
在Gleeble 1500热模拟机上,通过820~790℃温度范围内的多道次热压缩变形模拟了中厚板的精轧工艺,考察了不同铌、钒(氮)含量的低碳钢的组织演变过程、微合金元素的碳氮化物的析出行为和对形变诱导铁素体相变(DIFT)的影响。
3) deformation induced ferrite transformation
变形诱导铁素体相变
1.
Effects of the status of Nb in deformed austenite on deformation induced ferrite transformation (DIFT) have been studied with Gleeble 2000 simulator, optical microscopy, TEM on pipeline steel X65.
通过Gleeble2000热模拟实验机,研究了X65管线钢中Nb在变形奥氏体中的析出状态对变形诱导铁素体相变(DIFT)的影响。
2.
The microstructure evolution during deformation induced ferrite transformation (DIPT) for a Nb mi croalloyed low carbon steel was investigated by thermal simulating tests, then compared with the microstructure evolution during continuous cooling transformation of work hardening austenite.
本文利用热模拟单向压缩实验,研究了一种Nb微合金钢变形诱导铁素体相变(DIFT)组织演变的基本特征,并与变形奥氏体连续冷却相变中的组织变化进行了比较。
4) deformation induced transformation ferrite
形变诱导铁素体
1.
The deformation characters and the evolution of deformation induced transformation ferrite of low carbon steel were studied.
在Gleeble-3500型热模拟试验机上对Q235钢进行了单向压缩试验,研究了不同温度下低碳钢的变形特征以及形变诱导铁素体的演变行为和在保温过程中的变化。
2.
The deformation character and evolution of deformation induced transformation ferrite of low carbon steel were studied.
研究了不同温度下低碳钢变形特征以及形变诱导铁素体演变行为和在保温过程中的变化。
5) deformation induced ferrite
形变诱导铁素体
1.
Phase Transformation Mechanism,Structure and Property of Pro-eutectoid Ferrite and Deformation Induced Ferrite of Low Carbon Steel;
低碳钢先共析铁素体和形变诱导铁素体的相变机制、组织和性能
2.
The results show that deformation induced ferrite(DIF) can be obtained through suitable deformation for medium carbon steel as deformation raises the transformation temperature from austenite to ferrite.
结果表明,中碳钢通过形变可获得形变诱导铁素体(DIF);形变提高奥氏体向铁素体转变温度,随着形变温度的降低,DIF含量呈反“S”形增加,即先缓慢增加,随后快速增加,当DIF量超过平衡态铁素体量时,其增加趋势趋缓。
3.
The results show that the formation of ultra-fine grains is resulting from the common effect of dynamic recrystallization and deformation induced ferrite (DIF).
结果表明：超细晶铁素体的获得主要是形变诱导铁素体和铁素体动态再结晶两种机制共同作用的结果在８７Ｏ－７６０℃低温８０％变形可以获得的等轴均匀超细品铁素体。
6) deformation induced fer-rite transformation
形变诱导铁索体相变
补充资料：变形诱导相变
变形诱导相变
strain-induced phase transformation
b旧nx一ng youdoox旧ngb旧n变形诱导相变(strain一indueed phase trans-formation)钢中奥氏体因受到变形而提早发生相变的现象，是一种变形与相变之间关系的行为。钢在奥氏体未再结晶区域温度范围内轧制(锻造)变形时，奥氏体晶粒被压扁拉长，造成了晶界面积的增大和晶内变形能的增加，同时在晶粒内部形成了大量的变形带亚结构。这些都为奥氏体发生铁素体相变提供了优先形核的位置，促进了下~a相变，使之提前在较高的温度和较短的孕育时间内开始发生。除了F:(Ar3)点温度升高以外，整个CCT曲线都将因为奥氏体变形而向高温(向上)、短时(向左)方向移动。 在控制轧制过程中，随着变形温度的降低和变形量的增大，相变开始温度和终了温度升高的幅度以及相变开始时间和终了时间的缩短幅度增大。例如，含Nb低合金高强度钢在奥氏体未再结晶温度区域变形60写以上时可以使F。温度升高近100℃，因此在制定控制轧制、控制冷却工艺制度时必须考虑变形诱导相变的影响。 此外，利用变形诱导相变现象，适当控制热轧与轧后冷却工艺参数，在使Fs和Ff温度向高温和短时方向移动的同时，由于7~a相变中a数量的增多，造成了还未相变的奥氏体中发生碳富集而提高了奥氏体的稳定性，引起了7斗a和y~B(贝氏体)的两相分离型相变，为生产热轧双相钢提供了基本条件。 变形诱导相变现象的发现与研究是从20世纪70年代以来人们在控制轧制工艺的研究和应用中开始的。中国对变形诱导相变的研究始于80年代，是由冶金部钢铁研究总院首先进行的。这一现象的研究与提出将对人们理解与掌握形变热处理、控制轧制和控制冷却工艺中变形与相变的内在联系、研制新的钢材品种、开发新的生产工艺提供有力的依据。
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参考词条