珠光体

All in all, under the factors above, the depleted zone in pearlite steel would crack fragilely for formation of creep-flaw in low stress during operating at high temperature before designed expiration date.

异种钢的焊接接头在高温运行中，在高温和应力的作用下，珠光体的脱碳层会产生蠕变裂纹，发生低应力脆性断裂，从而导致接头的早期失效。

Based on the finite element analysis of single pearlitic colony with different interlamellar spacings,the reason of the interlamellar spacing is investigated,which plays an important role in the mechanics behavior of single pearlitic colony .

作者从对具有不同片层间距的珠光体团的有限元分析结果出发，定性分析了层间距对其力学性能及疲劳寿命的影响机制。

Through the comparison of this model with Miller and Smith's shear cracking model, it can be shown that the smaller the interlamellar spacing of pearlite is, the higher the resistance of crack initiation and propagation will be.

该模型与Miller和Smith提出的剪切开裂模型的比较可以说明，珠光体片层间距越细小，裂纹萌生和扩展的阻力越大。

Based on the non-classic theory of plasticity, the elastic and plastic constitutive relationship is established for peaelitic colony with finer interlamellar spacing, and the corresponding numerical method is also developed.

基于非经典塑性理论，建立了珠光体团的弹塑性本构方程，发展了相应的数值计算方法。

The finer the pearlitic interlamellar, the more the plastical deformation and the higher the ability of deformation strengthening.

珠光体原始片层间距越细小，塑性变形特征越显著，形变强化能力越高。

Pearlitic heat-resistant steel alloy elements are commonly used in chrome.

珠光体耐热钢中常用的合金元素有铬。

The dislocation configuration and other related details of pearlitic heat-resistant steel 12Cr1MoV were observed and analyzed by using transmission electron microscope.

用透射电子显微镜对12Cr1MoV珠光体耐热钢的位错组态和其他细节进行了观察和分析。

The microstructure changes of pearlitic eutectoid steel induced by cold rolling were investigated by using SEM, TEM and XRD etc.

用SEM、TEM及XRD等方法研究了共析钢中珠光体经40%—90%的冷轧变形后所产生的显微组织变化。

Cr1MoV and Cr5Mo are three common types of pearlitic heat resistant steel and widely used for high temperature tubes in petro-chemical industry, so it is necessary to develop a set of computer aided decision-making system for safety evaluation of tubes.

20钢、12Cr1MoV和Cr5Mo是 3种常用作石化企业高温炉管材料的珠光体耐热钢，开发和应用计算机决策支持系统对高温管线进行安全评估是非常必要的。

As the steel carbon and alloy elements working together to make it extremely easy to lead in the welding hardened organization, welding poor performance should be this, pearlitic heat-resistant steel in general preheating before welding, after welding tempered.

由于钢中碳和合金元素的共同作用，使其在焊接时极易形成淬硬组织，焊接性能较差，应此，珠光体耐热钢一般焊前进行预热，焊后进行回火处理。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。