大量粗片状珠光体的形成与吐丝前后的冷却速度过慢等因素有关。
Formation of large quantities of the flake perlite is closely dependent on the extremely low cooling rate before and after wire-drawing.
一般地，片状珠光体的强度高于粒状珠光体、塑性低于球状珠光体。
In general, the strength of carbon steel containing lamellar pearlite is higher than that of carbon steel containing nodular pearlite, but the ductility of the former is lower than that of latter.
粒状珠光体的硬度和冲击韧性均优于层片状珠光体，但耐磨性逊于后者。
Both hardness and impact toughness of the granular pearlite are better than that of lamellar pearlite, but the latter has a better wear resistance.
而铌元素的加入增大了过冷奥氏体的稳定性，相变点温度降低，并且推迟珠光体的转变。
But Nb adding increases the under-heating austenite stability, reduces the temperature of phase transformation point and postpones the transformation of pearlite.
作为结果的组织结构是初步的共析铁素体(在共析反应前的铁素体)和部分珠光体的混合物。
The resulting structure is a mixture of primary or pro-eutectoid ferrite (ferrite that formed above the eutectoid reaction) and regions of pearlite.
RE偏聚使珠光体转变的开始温度降低，从而减小珠光体的片层厚度及层间距，并导致粒状珠光体的形成。
The C-RE segregation lowers the transformation temperature of pearlite, which lessens the thickness of lamellas and lamellar spacing of pearlite and induces the granular pearlite.
研究结果表明，铌含量的提高抑制了珠光体的形成，促进了针状铁素体的形成，细小的碳氮化铌析出相增多；
The results show that niobium increment retains the formation of pearlite and makes fraction of acicular ferrite and fine niobium carbonitride niobium increase.
同时稀土与低熔点合金元素的加入，是强烈促进珠光体的元素，具有稳定珠光体的作用，提高了奥氏体化温度；
The austenitizing temperature was raised by addition of RE and low melting-point alloy which were the elements of strongly promoting and stabilizing the pearlite.
模拟溶液各离子含量成倍增加后，退化珠光体的阳极电流密度升高，电化学交流阻抗值降低，局部腐蚀效应增大。
As the ion contents of the soil simulation solution doubled, the anodic dissolution of degenerated pearlite increases, and the local impedance of the electrode decreases.
结果表明，对于亚共析钢，在中温区变形、保温后可使先共析铁素体和珠光体组织大大细化，显著改善钢中铁素体和珠光体的分布状况；
The results show that, in hypoeutectoid steels, deformation at medium temperature may fine the structure and improve the distribution of ferrite and pearlite greatly;
结果表明，强磁场明显促进了珠光体的转变， 珠光体的转变量随磁场强度的升高而增加， 磁场作用时间的延长也会使珠光体转变量增加。
The results show that high magnetic field obviously accelerates pearlite transformation, and the quantity of pearlite increases with the increase of magnetic field intensity and holding time.
进而分析了脉冲电场作用下基体中石墨晶核的数量增加，有效地缩短了珠光体分解时碳原子的扩散距离，从而加速了第二阶段石墨化过程中珠光体的转变。
The result indicated that transformation of perlite was accelerated and the quantities of ferrolites was increased under the function of impulse electric field at second stage graphitization.
应用电子衍衬技术和扫描电镜等手段，对共析珠光体轨钢的微观结构和断裂过程，进行了观察和分析。
The microstructure and fracture process of an eutectoid pearlitic steel have been observation and analysed by means of electron-diffraction-contrast technique and SEM.
就像以前说的一样，当缓慢冷却到这温度时所有剩余奥氏体转化为珠光体。
As before, any remaining austenite transforms to pearlite upon slow cooling through this temperature.
高于此点，由于超过共析点钢完全由珠光体和退火状态的渗碳体组成，硬度增加并不多。
Above this point the hardness can be increased only slightly, because steels above the eutectoid point are made up entirely of pearlite and cementite in the annealed state.
使用状态的组织为细晶粒的铁素体—珠光体，强度比普通碳素结构钢Q235高约20%～30%，耐大气腐蚀性能高20%～38%。
Using the state of the organization for the fine grain ferrite pearlite, strength than ordinary carbon structural steel Q235 about 20% ~ 30%, high atmospheric corrosion resistance of 20% ~ 38%.
含铁碳化物或含碳铁的固体溶体，冷却可形成珠光体或马氏体。
A solid solution of ferric carbide or carbon in iron; cools to form pearlite or marten site.
钢中珠光体转变属典型的扩散型共析转变。
Pearlitic transformation in steel is a typical diffusion eutectoid transition.
珠光体钢轨钢的组织与性能之间的关系、合金元素的作用机理一直是人们不断研究的课题。
Relationship between microstructure of pearlitic rail steels and mechanical properties, and the effects of alloying elements are subject, which people have always been studying.
最后讲述了珠光体生长的台阶机制及一些非铁碳合金的共析组织。
At the last, the steps mechanism of pearlitic growing and some eutectoid structures of non Fe-C alloys are pointed out.
结果表明，这种黑色团状异常组织是由片间距不同的团状珠光体组成。
The experimental results show that this block and black round structure is composed of pearlite blocks with variable plate intervals.
因而有必要研究珠光体耐热钢的损伤规律及安全评估技术。
Therefore it is necessary to research the damage law and security access technology of the pearlite heat resistant steels.
该方程不仅适合微合金中碳钢的铁素体和珠光体组织，而且也适合高碳微合金钢的珠光体组织和低碳微合金钢的铁素体组织。
The equations suit not only ferrite and pearlite in microalloyed medium carbon steel but also pearlite in high carbon microalloyed steel and ferrite in low carbon microalloyed steel.
认为，油管失效是由于微电池腐蚀造成的，腐蚀先在钢管外表面能构成电池回路的珠光体晶粒中进行，然后逐渐扩展到周围的晶粒。
Micro cell corrosion originally carried out in pearlites on the external surface of the pipe where micro cell circuit could be formed, and gradually developed and spreaded.
组织分析发现，未溶碳化物可成为珠光体转变的核心，促进珠光体转变。
The microstructure analyses find that remaining carbide could be a nucleus of pearlite transformation and accelerate pearlite transformation.
结果表明：珠光体裂纹萌生与扩展方式取决于珠光体层片和拉伸轴的位向关系。
The results indicate that the crack initiation and propagation mechanism depends on the orientation of pearlite lamellae with respect to the tensile axis.
应用MARC/MENTAT商用有限元软件，对铁素体/珠光体钢的单向拉伸过程进行了有限元模拟。
The flow stress of ferrite/pearlite steel under uniaxial tension was simulated with finite element method (FEM) by applying commercial software MARC/MENTAT.
结果表明在相当大的冷却速度范围内，可获得稳定体积百分含量的细片状珠光体加铁素体组织。
The result shows that in a great scope of cooling rates, constant percentage of fine pearlite and ferrite can be obtained.
特定过冷度下的层片间距与正向界面推移速率的关系是珠光体生长动力学的主要问题。
The relationship between the lamellar spacing and the edgewise growth velocity under the specific undercooling is the core of growth kinetics.
通过二次随流孕育，稳定生产铸态珠光体球铁曲轴的生产工艺。
Crankshafts of as cast pearlite ductile iron have been produced stably by double random inoculation.
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