珠光体

The ΔKth decreases in value with the increase of either pearlite occurred in matrix or phosphorus content.

K_值随着基体中珠光体量、磷含量的增加而降低。

With the assumption of small thickness of lamella and small deformation as well as that both phases are elastoplastic, an elastoplastic constitutive description for the pearlitic colony is obtained based on non-classical theory of plasticity.

在小片层间距和各相材料均为弹塑性的假设下，采用有限元方法分析了垂直于片层方向上的材料响应特性及层厚的影响，并用非经典塑性理论推导了珠光体团的弹塑性本构方程。

Dissimilar metal welds between the austenitic stainless steel and Cr-Mo pearlitic heat-resistant steels are widely used in ...

国内外石油化工装置和电站的高温压力容器管线及锅炉蒸汽管道等大量使用Cr-Mo类珠光体热强钢。

The corresponding numerical algorithm is developed. The responses of pearlitic steel BS11 and single-phase hard-drawn copper subjected to asymmetrically cyclic loading are analyzed.

采用上述方法，分析了珠光体钢(BS11)和单相冷拉铜板受非对称循环载荷作用下的响应，分析结果和实验结果一致。

The results herein given are a preliminary approach in recent researches on the nodularity of pearlitic ductile cast iron and the relationship between the characteristic temperature values on the cooling curve and the nodularity is investigated.

本文介绍了热分析法测试珠光体球墨铸铁球化率的研究成果。指出冷却曲线上温度特征值与球化级别的对应关系。

1Cr5Mo, 12CrlMoV and 20# are three types of pearlitic heat resistant steel and widely used for high temperature tubes in petro-chemical industry, so their safety assessments are necessary for the sake of operation safety in high temperature cond.

以1Cr5Mo、12Cr1MoV和20钢三种常用作石化装置高温炉管材料的珠光体耐热钢为研究对象，针对其在高温服役中的安全评估问题，在以往工作的基础上，采用数据库和面向对象编程技术研究开发了一套高温管线安全评估决策支持系统，其目的是为大连石化公司数十套装置中加热炉辐射段管线与这三种材料相关的安全评估提供决策支持。

The experimental results denoted that the finer pearlite along the austenite boundaries in the as-cast Cr30Ni20NRE steel disappeared first under long-term and high-temperature service condition, and that an umber of Cr- richened carbides were formed due to unila-teral carburizing at long-term and high- temperature, consequently causing Ni to concentrate, bulging and calalyzing decomposition of the carburizing gas.

试验结果表明，长期在高温条件下服役，铸态Cr30Ni20NRE耐热钢中沿奥氏体晶界的珠光首先融入奥氏体，长期高温单边渗碳形成大量富铬碳化物，促使镍富集并起泡形成瘤状物，催化含碳气体的分解；表层瘤状物使辐射管表层疏松，表面积扩张，加快了碳向基体的渗入，提供了碳化物持续长大的条件，并引起沿碳化物周边开裂和奥氏体基体严重萎缩；合金元素的重新分布造成主合金元素铬和镍产生两极分化，镍和硅的富集促使石墨化，与侵入的氧形成内部氧化空洞和膨胀疏松，最终导致构件穿孔失效。

Crack foimed mainly in the soft ferritic phase, and then connected together through pearlite.

裂纹主要在软的铁素体内萌生，然后穿过珠光体连接。

A new ferrite-pearlite wheel steel with C and Si as main strengthening elements was developed aiming at the damage characteristics of heavy duty wagon wheel. With rational C and Si contents, the steel has high strength, relatively high toughness and reasonable phase transformation characteristics.

针对重载车轮的损伤特点，研制了一种以C、Si为主要强化元素的铁素体－珠光体型车轮新材料，通过C、Si含量的合理配合，使车轮材料具备了高强度并保持了较高的韧性，同时具有合理的相变特性。

The pearlite white iron has lower hardness and good machinability. It is used for making some parts of the sand pump to be worn not severely.

珠光体白口铸铁的硬度较低，加工性能较好，用於砂泵中某些磨损较少的部件。

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。