耐磨性

Paper Pimian vehicle due to the strong wear resistance, the skin build extremely strict requirements.

汽车用皮因皮面大耐磨性强，对皮材要求极为严格。

Based on the practice of the use of φ95mm subsurface sucker rod pump in Shengtuo Oilfield in recent years, the causes of the failure of the pump are analyzed, and relevant precautions are put forward:(1)selecting oil wells with sufficient fluid supply for pumping;(2)under the condition of the pump efficiency being the same, the submergence depth of the pump being somewhat larger than that of the small pump, and 450～500m being feasible;(3)adopting Grade H ultrahigh-strength rod string and fixing a sinker bar at the bottom of the rod string;(4)selecting long stroke and low pumping speed, and more than 5m stroke and less than 6min-1 pumping speed being recommended;(5)adopting zirconium oxide valve ball and seat ＋ spray welded plunger ＋ nitrided barrel.

根据胜坨油田近几年采用φ95mm有杆抽油泵提液的实践，分析了造成这种抽油泵失效的原因，包括与其配套的脱节器失效、抽油杆断脱、泵漏、电动机不配套和生产管理不善等。为增强泵的提液能力和工作可靠性，提出5 项预防措施：(1)选择有充足供液能力的油井；(2)在保持相同泵效的情况下，泵的沉没度应略大于小泵，推荐按450～500m设计；(3)采用H级超高强度抽油杆柱，并在杆柱底部配置一定重量的加重杆；(4)采用长冲程、低冲次的参数匹配，推荐光杆冲程大于5m，冲次小于6min-1；(5)为提高泵筒、活塞和阀座的防腐耐磨性，推荐采用&氧化锆阀球和阀座+喷焊柱塞+氮化泵筒&的结构形式。

2 Surfacing materials and welding equipment selection According to the working conditions of valve, valve plate oriented shroud must ensure that sufficient high temperature strength, but also satisfy some wear resistance.

1.2堆焊材料和焊接设备的选择根据调节阀的工作条件，阀碟导向凸肩既要保证有足够高温强度，又要满足一定的耐磨性。

Vacuum fusion sintering,NiCrBSi self-fluxing alloy,rare earth element,microstructure,wear resistance

中文关键词：真空熔结；NiCrBSi自熔合金；稀土元素；微观组织；耐磨性

So screw, nut design is based on wear resistance.

因此螺杆、螺母的设计依据是耐磨性。

Based on the mutual effect between PDC cutter and rock during the rock-breaking, the analytical approach of rubbing contact finite element is given.

PDC具有很高的硬度和耐磨性，作为高效切削元件被广泛地用于破碎岩石。

After an excellent corrosion resistance, and good abrasion resistance, chloride ions in the medium containing anti-stress corrosion is also good.

既有良好的耐腐蚀性，又有良好的耐磨性，在含有氯离子的介质中抗应力腐蚀性能也很好。

After an excellent corrosion resistance, have good abrasion resistance, chloride ions in the medium containing anti-stress corrosion is also good.

既有良好的耐腐蚀性又有良好的耐磨性，在含有氯离子的介质中抗应力腐蚀性能也很好。

The results indicated that the carbon nanotubes covalently bonded by GMA.

而接枝的有机分子有效的改善了碳纳米管在PMMA复合材料中的分散性问题，从而提高了PMMA复合材料的耐磨性和介电性能。

The company has imported advanced equipment and can produce 200-litre annular barrel by using high density polyvinyl resin which is of high rigidity and abradability and can bear ambient pressure.

该公司获得专利技术，进口设备、采用具有钢性大，耐磨性及耐环境压力等特点的高密度聚乙烯树脂生产200升环型塑料桶。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。