磨损

Meanwhile, it is also illustrates that the smaller chromium carbides have less restriction to formimg thin splats than larger ones, which beneficial to limit the size of pieces removed by impact of the sand particles, and the higher volume fraction of small chromium carbide may effect the erosion through enhancing interlamellar bonding of the splats which leads to increase the erosion resistance of the coating.

揭示了细小碳化物颗粒有利于获得扁平粒子厚度较小的涂层结构，可减小涂层冲蚀磨损过程中每次剥落的体积；较高含量的细小碳化物颗粒有利于提高涂层扁平粒子间的结合，从而提高涂层抗冲蚀磨损性吉臣。

Long time sliding causes fatigue failure of UHMWPE, a lot of big spalls are produced around the counterpart edge, debris from UHMWPE/PP blend does not show apparent increase with sliding time.

长的磨损时间导致UHMWPE疲劳破坏，产生大量的磨屑，而随磨损时间的延长，UHMWPE/PP表面的磨屑并无明显的增加。

So ,the temperature is quite essential for an engine to produce power .No engines can work well without suitable operating temperatures .If the engine runs too hot ,it may suffer form pre-ignition,while the air-fuel change is ignited prematurely from excessive combustion chamber temperature.Viscosity of the oil circulating in an over heating engine is reduced.Hot oil also forms varnish and carbon deposits may be drawn into the combustion chamber where it increases HC emission.This also causes poor performance and premature wear ,and may even result in engine damage.What is more,the behavior of the metals at excessively high temperature also differs from that at normal temperatures and can produce a condition in which the metal deforms slowly and continuously at a constant stress,If the engine runs too cold, the fuel will not vaporize properly.If liquid fuel reachees the cylinders,it will reduce lubrication by washing the oil from the cylinder walls and diluting the engin oil.This causes a loss ofperformance, an inrease in HC emissions, and premature engine wear.

所以，温度是很有必要的引擎来产生电力，没有引擎，可以工作，如果没有合适的操作温度，如果发动机运行太热，它可能遭受的形式预点火，而空气燃料的改变是点火过早过量燃烧室temperature.viscosity的石油流通的过度加热发动机是reduced.hot油价也构成了清漆和碳存款可能会被拖入燃烧室而增加hc的emission.this也造成业绩不佳和过早磨损，甚至可能导致发动机damage.what更重要的是，行为的研究金属在过高的温度也有不同，在正常温度下，可以达到的一个条件，其中金属变形速度缓慢，不断在恒应力，如果发动机运行太冷了，燃料价格将不会汽化properly.if液体燃料reachees气瓶，将减少润滑洗油从气缸壁和稀释器oil.this造成损失ofperformance ， inrease在hc排放，发动机过早磨损。

The self-lubricanting coating of nickel-coated graphite was prepared by oxygen-acetylene flame spraying technology and its friction and wear properties at room temperature were studied in a ball on disk test rig.

选用镍包石墨粉末，采用氧-乙炔火焰喷涂技术制备镍包石墨自润滑涂层，在球-盘摩擦磨损试验机上探讨了室温条件下镍包石墨自润滑涂层的摩擦磨损性能。

The abrasion and scuffing behaviour of Ni-base spray-welded coating containing WC by oxygen-acetylene was studied and compared with those of boride layer using a MM200 wear tester.

利用MM200型磨损试验机研究了氧-乙炔焰镍基碳化钨喷熔层的磨粒磨损和抗咬合特性，并与硼化物层进行了比较。

Saree, Sari,Sarees, saris,Fancy Sari,Silk Sari,Bridal Sari,Indian Sari,Bridal Outfit,Bridal Wear,Designer Sari,Indian Bridal Wear.

纱丽，纱丽，纱丽，纱丽，别致纱丽，丝绸纱丽，纱丽婚纱，印度纱丽，婚纱配备，婚纱磨损，设计师纱丽，印度婚纱磨损。

While a ball mill is working, balls in the mill are lifted, and then are thrown away with a certain velocity to collide raw material. But at the same time, balls and underboarding are also got collision which may make balls and underboarding fracture. Considering the tough lubrication condition and dust and prills have easy access to meshing zone of gears, the heavy abrasion on gear surface often appears in the upstage gear of open-gear transmission of ball mill.

当球磨机正常运转时，磨球被提升到一定高度后抛落，以一定的速度对物料产生冲击而粉碎物料，同时也对磨球和衬板自身产生冲击，这可能造成磨球和衬板的破球磨机的末级开式齿轮传动，由于润滑条件差，粉尘、金属颗粒容易进入啮合区，齿面常常出现严重磨损，导致齿廓形状发生变化，最后因齿厚磨损过多而折断。

According to the conditions under the oil well and the technical requirements,the pump structure is changed from the plunger form to the piston form to compensate the wear in running of the piston ring by elasticity of itself.

活塞式抽油泵是目前普遍采用的采油设备，由于泵筒发生不同程度的磨损，导致在抽油过程中出现泄漏，根据油田井下的工况和技术要求，在不改变泵筒的前提下，把柱塞式结构改成活塞式结构，靠活塞环自身的弹性力来补偿工作运行中的磨损，所研制的活塞环，经油田的实际应用，收到良好的应用效果

Since the rotary plunger pump piston at each stroke can randomly rotate constantly change with the pump plunger cylinder contact surface, so that circular plunger gradually wear uniform or scaling at the same time, sand from the plunger and pump barrel between discharge and resolved accumulation Materials abrasion caused by wear and serious positioning rod release.

自旋转柱塞抽油泵可使柱塞在每一冲程中随机转动，不断地改变柱塞与泵筒的接触面，使柱塞圆周逐渐均匀磨损的同时将砂粒或结垢从柱塞与泵筒之间排出，解决了磨蚀材料聚集所引起的严重定位磨损及杆柱脱扣

In the present work,Cu nanoparticles with an average size of 20-50 nm were dispersed in diesel fuel oil . A injection pump plunger was in-situ repaired on a 12PSDB75 fuel injection pump by applying auto-reconditioning function of Cu nanoparticles. Mophologies and typicle element distributions of the plunger piston surface before and after repair were analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy.

将平均粒径为20~50nm的铜粉均匀分散到柴油中，在12PSDB75型喷油泵试验台上利用纳米铜微粒的磨损自修复性能，在不拆卸零件的情况下对磨损失效的喷油泵柱塞偶件进行了原位修复，利用扫描电镜、能谱仪等对修复前后柱塞表面进行了形貌与微区成分分析。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐