珠光体的

Fining pearlite, therefore, is one of the most effective method to further improve the contact fatigue properties of PD3 rail steel.

因此，细化珠光体是进一步提高接触疲劳抗力的有效途径。

The results show that,hardness ofslideway is correlated with content and lamella inferval distance of pearlite.

结果表明，珠光体含量和片层间距是影响导轨硬度的主要因素。

For welding pearlite hot resisting steel which working temperature is below 540℃, like 12CrMoV.

焊接工作温度在540℃以下的珠光体耐热钢（如12CrMoV）。

Pearlite obviously occurs in the structure under lower cooling speed(2℃/s).

冷却速度较低( 2℃/ s)时，组织中出现明显的珠光体。

The results show that the interlamellar spacing of pearlite is decreased progressively during the cold drawing.

试验结果表明，随着拉拔变形应变量的增大，珠光体片层间距逐渐减小，钢丝强度随之升高。

The present paper analyzes causes to the breakdown of the wire rod such as the central shrinkage cavity and carbon segregation, surface transverse cracks, harmful structure of bulky pearlite and web shaped carbonide and puts forward a few relevant measures for improvement in the physical product quality and reduction of fracture rate of the wire rod including proper control of the casting temperature,drawing speed, intensity of secondary cooling as well as adjustment of the intensity of control rolling and accelerated cooling and optimization of the drawing parameters.

通过对中心缩孔和碳偏析、表面横裂纹、粗大珠光体或网状碳化物不良组织等引起断丝原因的分析，提出通过合理控制浇注温度、拉速、二冷强度、控轧控冷强度及拉拔工艺参数等措施，改进盘条实物质量，降低断丝率。关键词 SWRH82B/SAE1080；脆断；质量分析；工艺控制

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 test result shows that the mechanical properties of the dual-phase structure are much higher than those of ferritic plus pearlitic structures, that the dual-phase structure is of better corrosion resistance in some cases for Ca_2 has corrosion-moderating effects, and that hot-rolling dual-phase structure of the low-carbon Mn-Si steel wit...

试验结果表明：双相组织的力学性能远高于通常的铁索体+珠光体组织；在一定条件下，双相组织具有更好的耐蚀性，Ca_2有明显的缓蚀作用；采用台阶淬火工艺，不含Cr、Mo的低碳锰硅钢也易于获得热轧双相组织。

The strength of HSLA steel with ferritic plus pearlitic mierostruetures has attained the limited value of 450～500MPa by traditionally microalloying treatment and TMCP. In order to further improve the strength grade, low carbon bainitic steel plates should be developed.

通过采用形变热处理工艺和微合金化，在保证高韧性和优异的焊接性能的条件下，具有铁素体珠光体组织的低碳低合金高强度钢的屈服强度可以达到500～550MPa的极限水平。

In ECAP route C, in order to accommodate the severe shear deformation the deformation form of lamellae cementite in pearlitic steel include periodical bending, periodical shearing and shearing fracture etc .

在C方式ECAP变形中，珠光体钢65Mn中的渗碳体以周期性的弯曲变形，周期性的剪切变形，剪切断裂等形式协调ECAP的强烈塑性变形。

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。