珠光体

Microstructure evolution in eutectoid steel during warm deformation in the temperature range from 600 to 700℃ was investigated by simulating hot compression test, SEM and thermomagnetic measurement. The effects of deformation and subsequent annealing on the spheroidizing of pearlite, refining of microstructure and dissolution of cementite were studied.

利用热模拟压缩变形、SEM和热磁法实验，研究了共析钢在600~700℃变形过程的组织演变规律，探讨了变形及随后保温过程对珠光体球化、组织超细化和渗碳体溶解、再析出的影响。

It is necessary to study the weldability of the bainite rail.The temperature field analysis was simulated by FEM.

文中对贝氏体与珠光体钢轨异种钢接头的焊接温度场进行了有限元分析，并且进行了试验测定。

As the deformation temperature decreases and strain value increases, the microstructure after cooled to room temperature inclined to be equiaxed ferrite and pearlite.

随着变形温度的降低和变形量的增大，变形后冷却过程倾向于得到等轴状的铁素体加珠光体的组织。

As final heat-treatment, normalizing can fine the grains, uniform the organization, reduce the ferrite in hypoeutectoid steel, increase pearlite and also fine the grains, so the strength, hardness and also toughness to be increased.

作为最终热处理，正火可以细化晶粒，使组织均匀化，减少亚共析钢中铁素体含量，使珠光体含量增多并细化，从而提高钢的强度、硬度和韧性。

The results show that with the finishing temperature at 950 ℃, as the cooling rate increases, interlamellar spacings of pearlite is reduced; as cooling rate reaches 5℃/s, martensite precipitates.

结果表明，随着冷却速度的加快，高碳钢SWRH77B在950℃变形时，其珠光体的片层间距变细；冷却速度达到5℃/s时，有马氏体组织析出。

The test results show that the contact fatigued microstructure characters mainly the reduction of pearlitic interlamellar spacing, the formation of different type of substructures as well as the deformation and fracture of cementitic lamellar in pearlite.

结果表明，PD3钢轨钢接触疲劳变形组织的主要特征是：珠光体片层间距的减小；不同类型亚结构的形成；渗碳体的变形与断裂。

Properties of pearlitic steel and austenitic stainless steel compound pipes TIG welded joint are studied in this paper.

研究了珠光体钢和奥氏体不锈钢复合管钨极氩弧焊接头的性能。

When the retained austenitic content is lower than 10%,the wear resistance will be reduced greatly due to in situ transformation of_(23)C_6 to M_3C and pearlitic structure forming.

当残留奥氏体含量低于10%时，由于23C6发生向M3C型碳化物的原位转变，相应的组织转变为珠光体，导致耐磨性急剧下降。

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。

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。