1) austenite grain size
奥氏体晶粒尺寸
1.
?The dynamic recrystallization and austenite grain size after recrystallization in a new MnCr gear steel were studied at a strain up to 07, at a range of temperature from 850 to 1?150?℃, at strain rate from 01 to 1 s-1 and at initial austenite grain size from 70 to 150?μm using a Gleeble 1500 thermomechanical test system.
1～1s-1,变形温度为850～1150℃,原始奥氏体晶粒尺寸为70～150μm条件下的动态再结晶行为及再结晶后奥氏体晶粒尺寸的变化规律·研究结果表明:在一定的变形量下,变形速率、变形温度、奥氏体晶粒尺寸是影响再结晶的3个因素,只有变形条件Z小于上临界值Zc时才会发生动态再结晶·再结晶后奥氏体晶粒尺寸 D是由变形条件Z惟一地决定而与原始奥氏体晶粒大小无关,Z增加, D减小,二者符合关系式Z=A D-3。
2.
At the same time, effects of rolling temperature and deformed amount on austenite grain size in AH36 steel were also studied with duo mill.
在轧制温度一定时 ,变形量和钛含量增加 ,奥氏体晶粒尺寸减小。
2) austenite grain
奥氏体晶粒
1.
An improvement of the etching technique for displaying austenite grains in hull structure plate steel
船板钢奥氏体晶粒浸蚀显示方法的改进
2.
The austenite grains of the test steel are significantly refined after the microalloying process.
结果表明:经过钒-铌微合金化处理后,该钢的奥氏体晶粒得到显著细化;伴随着晶粒的细化,其冲击吸收功得到较大幅度的提高;在渗碳温度范围内长时间保温时不会发生奥氏体晶粒的异常长大;晶粒细化也使其渗碳层的组织和性能得到改善。
3.
The results show that when heating temperature is lower than 950℃,the experimental steel has a smaller grain dimension;when heating temperature is above 1100℃,the austenite grains grow rapidly.
研究了X70级管线钢在不同加热温度和不同保温时间下的奥氏体晶粒长大规律。
3) austenitic grain
奥氏体晶粒
1.
By means of high temperature microscope the phenomenon of austenitic grain growth in the low carbon steels(20 and 15CrMo) when heated in vacuum is observed,and its dynamic curves have been also graphied.
用高温金相显微镜观察了低碳钢 (2 0及 15CrMo钢 )在真空加热时奥氏体晶粒长大现象 ,绘制了它们的长大动力学曲线。
2.
By means of high temperature microscope to take a series of photomicrograph during heating specimen to the different temperture and graph its dynemie curves,the austenitic grain growth tendencies are compared.
用高温金相显微镜摄取了常用弹簧钢 (6 5 ,6 5Mn ,6 0Si2Mn及 5 0CrVA)奥氏体晶粒长大的系列显微照片 ,绘制了晶粒长大的动力学曲线 ,比较了奥氏体晶粒长大倾向。
3.
By means of high temperature microcope the phoromenon of athermal and isothermal growth of the austenitic grains in 65Mn steel during heating in vacuum is observed and studied.
采用高温金相显微镜观察 6 5Mn钢试样在真空加热时奥氏体晶粒的变温与恒温长大现象 ,绘出了奥氏体晶粒长大动力学曲线 ;分析了奥氏体晶粒内部的退火孪晶的各种形态及孪生变形特征。
4) ferrite grain size
铁素体晶粒尺寸
1.
Double experiments of controlled rolling/cooling process were carried out on a lab mill and the results showed that the effect of ferrite grain size on the mechanical properties is greater than that of pearlite morphology for the low-carbon cold heading steel.
对低碳铆螺钢采用两次控轧控冷试验,结果表明,铁素体晶粒尺寸比珠光体形态对低碳铆螺钢力学性能的影响要大。
2.
A study on effect of reversing cold rolling on texture and ferrite grain size of DX51D(LCAK steel) and DX54D(IF steel) has been done by simulating experiment of reversing and continuous cold rolling and annealing in the laboratory.
在实验室通过可逆式和连续式冷轧及退火模拟试验,研究了可逆式冷轧对DX51D(低碳铝镇静钢)和DX54D(无间隙原子钢)钢板织构及铁素体晶粒尺寸的影响。
5) grain size
晶粒尺寸
1.
Influence of wire rolling process parameters on austenite grain size of high carbon steel;
高碳钢线材轧制工艺参数对晶粒尺寸的影响
2.
Prediction of the flow behavior and grain size during forming for nickel alloy heavy forging;
镍基合金大锻件成形过程流变行为与晶粒尺寸预测
3.
Modelling for grain size and flow stress of magnesium alloy based on BP neural network;
基于BP神经网络的镁合金晶粒尺寸及流变应力模型
6) crystallite size
晶粒尺寸
1.
Determination of crystallite size and strain by X-ray powder
晶粒尺寸和应变的X射线粉末衍射法测定
2.
The effects of the amount of Gd~ 3+ -doping and calcination temperature on the photocatalytic activity for photocatalytic degradation of methylene blue (MB) in aqueous solution, phase structure, crystallite size, surface texture properties of the nanopowders were investigated,and t.
研究了Gd3+掺杂量和焙烧温度对样品光催化降解亚甲基蓝的活性、相结构、晶粒尺寸和表面织构特性的影响,并结合表面光电特性和表面组成等探讨了Gd3+掺杂对纳米TiO2的光催化活性的影响机制。
3.
The effects of pHinitial value, hydrothermal temperature and hydrothermal time on the morphology, crystal phase and crystallite size of TiO2 powder were investigated.
研究了反应初始pH值、水热反应温度和水热反应时间对TiO2形貌、物相和晶粒尺寸的影响。
补充资料：奥氏体晶粒
奥氏体晶粒
austenite grain
aoshrt一J一ngl-奥氏体晶粒(austenite grain)钢在奥氏体化时所得到的晶粒。此时的晶粒尺寸称为奥氏体晶粒度。 分类奥氏体晶粒有起始晶粒、实际晶粒和本质晶粒3种不同的概念。(1)起始晶粒。指加热时奥氏体转变过程刚刚结束时的晶粒，此时的晶粒尺寸称为奥氏体起始晶粒度。(2)实际晶粒。指在热处理时某一具体加热条件下最终所得的奥氏体晶粒，其尺寸大小即为奥氏体实际晶粒度。(3)本质晶粒。指各种钢加热时奥氏体晶粒长大的倾向，晶粒容易长大的称本质粗晶粒，晶粒不易长大的称本质细晶粒。通常在实际金属热处理条件下所得到的奥氏体晶粒大小，即为该条件下的实际晶粒度，而一系列实际晶粒度的测得即表示出该钢材的本质晶粒度。据中国原冶金工业部标准YB27一77规定，测定奥氏体本质晶粒度是将钢加热到93oC，保温3~8h后进行。因此温度略高于一般热处理加热温度，而相当于钢的渗碳温度，经此正常处理后，奥氏体晶粒不过分长大者，即称此钢为本质细晶粒钢。 显示方法绝大部分钢的奥氏体只是在高温下才是稳定的。因此欲测定奥氏体晶粒就得设法将高温状态奥氏体轮廓的痕迹在室温下显示出来，常用的显示奥氏体晶粒的方法可归纳为渗入外来元素法、化学试剂腐蚀法和控制冷却速度法3种。(1)渗入外来元素法。如渗碳法和氧化法，是利用奥氏体晶界优先形成渗碳体和氧化亚铁等组成物，形成网络显示出奥氏体轮廓。渗碳法一般适用于不高于0.3%C的渗碳钢和含不高于。.6%C而含碳化物元素较多的其他类型钢。氧化法却适用于任何结构钢和工具钢。(2)化学试剂腐蚀法。钢材经不同温度的淬火一回火处理后，磨光并用饱和苦味酸水溶液和新洁尔灭几滴浸蚀能抑制马氏体组织，促使奥氏体晶界的显示。或者直接用盐酸1~smL、苦味酸(饱和的)和乙醇浸蚀，使马氏体直接显示出来，利用马氏体深浅不同和颜色的差异而显示出奥氏体的晶粒大小，此法适用于合金化程度高的能直接淬硬的钢。(3)控制冷却速度法。低碳钢、亚共析钢、共析钢、过共析钢可控制冷却速度使钢的奥氏体周围先共析析出网状铁素体、网状渗碳体，或使屈氏体沿晶界少量析出以显示出奥氏体晶粒。 测定方法测定奥氏体晶粒度常用比较法和统计法。比较法测定奥氏体晶粒度是根据YB27一77级别图与之相比较。标准晶粒度分8级，1一4级属粗晶粒，5一8级属细晶粒，8级以上的10一13级为超细晶粒。此法均在100倍显微镜下观察。晶粒度级别N与晶粒大小之间符合n一ZN一’或澎一ZN刁的关系，式中n为在放大100倍下观察时，每6.45mm2视野中的平均晶粒数;n’为实际每lmmZ面积中平均晶粒数。
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参考词条