磨损层

The simulation test of determining the viscous resistance of the sucker rod with Ni-P-PTFE plating is conducted. The test result shows that the viscous resistance of Ni-P-PTFE plated rod in polymer solution is 20% less than that of the Ni-P plated rod, and the compound layer has better wear- and corrosion-resistance. There...

测定粘滞阻力的现场模拟实验表明，镀覆Ni P PTFE的仿抽油杆比常规镀Ni P的仿抽油杆在聚合物溶液中所受的粘滞阻力约小 2 0 %，且复合镀层具有优良的耐磨和耐蚀性，因此这种工艺对减少抽油杆磨损断裂事故，延长使用寿命具有重大意义

If the stone surface has been accidented or lacerated, polish the stone surface by using a reconditioning grinding disc with a proper number of eyes till it is even and smooth

清理干净石材表面污渍、腊层，并确保石材表面平整、光滑，若石材表面有划道或凹凸不平时，视磨损程度选用不同目数的翻新磨片打磨至石材表面平整、光滑

There are three primary types of wear:(1) abrasie, in which the harder of the surfaces produces grooes in the softer material,(2) adhesie, in which the softer material is transferred as a thin film onto the harder surface, and (3) fatigue, in which repetitie loading produces subsurface cracks and particles, or sheets of material subsequently delaminate and are lost from the surface.

磨损主要有三种类型：1、研磨，硬质表面在软质材料上造成沟槽；2、粘着，软质材料形成薄膜移覆于硬质物体的表面；3、疲劳，反复负载造成材料表面断裂及颗粒形成，或材料出现层裂并从表面脱落。

Using oxygen ethine flame spraying weld technology,taking Ni base alloy powder Ni O2C as material of spraying weld layer,the spraying weld prestrengthening to the sealing chute of No.

采用氧一乙炔火焰喷焊工艺，选择镍基合金粉末 Ni-O2 C作为喷焊层材料，对莱钢烧结厂 1#烧结机密封滑道，进行喷焊预强化，解决了高温烟气冲蚀和磨粒磨损问题。

The results showed that, the unsmoothed surface can change the ploughing to rolling when the surface are worn by abrasive.

在两体静载磨料磨损工况下，仿生非光滑耐磨复合层的耐磨性是45钢的 2 9倍。

WC particles also can make the abrasive particles obtuse ,consequently reduce the cutting of abrasive particles to the coating.(7) The coating surface with unsmoothed units make the abrasive particles change moving direction . They can change the ploughing to rolling and bring light longitudinal vibration contributing to reducing the shearing force when the surface are worn by abrasive particles.

具有非光滑结构单元的复合层表面使参与复合材料磨损的磨粒改变运动方向，使之由滑动变为滚动，产生有利于减小切向力的法向微振动，减少磨粒和复合材料的接触面积和作用时间，从而大大减轻了磨粒对复合材料表面的损伤。

As for the air percussive rotary drilling, because of its advantages of high ROP, long bit life, light WOB, reduced wear of drill collar, large cuttings, low drilling cost, low formation damage and no lost circulation, it has gained acceptance.

空气冲击回转钻井在一些特定的地层和井眼条件下具有高机械钻速、长钻头寿命、小钻压、较轻钻具磨损、大岩屑、低钻井成本、较轻油层污染和避免井漏等优点，因此很早就被钻井界接受。

The influence of the content of rare-earth La on microhardness and erosion corrosion-wear resistance of hot-dipped aluminizing layer was studied in this paper.

研究了稀土La及其加入量对热浸镀渗稀土铝合金渗层显微硬度及抗冲蚀腐蚀磨损性能的影响。

Through the elastic mechanics, fracture mechanics and FEM, the reason for intergranular and transgranular wear characteristics of PCD tool were analyzed and wear regions based on original diamond grain size were delimitated.

并根据实验研究与理论分析，建立了PCD刀具切削加工Al〓O〓颗粒耐磨层强化复合地板时的刀具磨损模型。

The experiment and theory proved that the wear resistance and fatigue resistance of the ductile iron crankshaft could be greatly improved,and also the uniform layer of hardness and residual stress could be obtained by the second method-the laser circumference continuously scans the neck of crankshaft,and the laser forms 45°angle with the central line of crankshaft to scan the partial filleted angle of the crankshaft.

实验与分析证明：采用轴颈周向螺旋扫描，过渡圆角处激光束与轴心线成45°角的部分圆角的激光扫描处理方法，更能获得较为均匀的硬化层和残余应力，从而达到了提高曲轴抗磨损，抗疲劳的综合机械性能。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。