查询词典 pearlite

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。

The product introduces the pearlite is one kind of volcanic eruptions acidic lava, after cools the vitreous humor rock which suddenly becomes, because it has the pearl crevasse structure to acquire fame.

珍珠岩是一种火山喷发的酸性熔岩，经急剧冷却而成的玻璃质岩石，因其具有珍珠裂隙结构而得名。

The product introduces the pearlite is one kind of volcanic eruption's acidic lava, after cools the vitreous humor rock which suddenly becomes, because it has the pearl crevasse structure to acquire fame.

珍珠岩 是一种火山喷发的酸性熔岩，经急剧冷却而成的玻璃质岩石，因其具有珍珠裂隙结构而得名。

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

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。

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。

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。

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。

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。

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。