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一、概述讨论胶管泵之前,先参阅一下柱塞泵。从图1可以看出,泵缸、柱塞、进出口阀和填料函是组成泵头的必需构件。这些构件也是与输送介质接触的部分。因此,当输送强腐蚀性介质或剧毒介质时,柱塞泵就会因腐蚀和泄漏二个因素而影响其使用。虽然也可改用隔膜泵、波纹管式泵 相似文献
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Cu-30Ni-xRE(x=0-0.213 wt.%) alloy was prepared by adding rare earths(RE) in melted Cu-30Ni alloy using metal mould casting method.The effects of RE on corrosion resistance of the alloy in simulated seawater were investigated using optical microscope,scanning electronic microscope with energy-dispersive spectrometer and electrochemical measurement system.The results showed that the corrosion resistance of Cu-30Ni alloy was greatly improved by adding proper amount of RE,whereas excess addition of RE worsened ... 相似文献
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一、前言风扇磨煤机是常用的高速磨煤机,广泛应用于电力、冶金系统。其主要磨损件冲击板,通常用高锰钢制造。由于在中、低冲击载荷磨损条件下工作的高锰钢零件,难以发挥其加工硬化的特点,故耐磨性并不高。因而造成钢材大量耗损,检修工作量大。还会使发电出力降低。为了提高在中、低冲击载荷工况条件下奥氏体锰钢的耐磨性,国内外学者做了大量试验研究工作,采用多种方法来强化奥氏体基体,增加抗磨质点,提高加工硬化速率等。本试验研究包括:减少含锰量(降至6~9%),以降低奥氏体的稳定性,提高加工硬化速率;适当提高含碳 相似文献
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Deformed high lead-brasses have excellent machining characteristics and good mechanical and physicalproperties.They are widely used in mechanical,clock-watch and pen-making field.Especially,they are suit-able for deep-hole machining.Because of their worse hot-working characteristics,there exists trouble inproduction process.It is reported that the rare earth metals could improve the hot-rolling property,but themechanism is still unclear. 相似文献
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谈荣生 《兵器材料科学与工程》1986,(5)
<正> 铝-镁系变形合金属于不可热处理强化的防锈铝合金,它具有中等强度、良好的塑性和焊接性以及高的耐蚀性。该系合金可采用冷变形提高其强度,特别是屈服强度,但塑性有所降低。加工硬化不会降低材料的高耐蚀性和良好的焊接性。它广泛用来生产管材、型材、板材等半成品,采用铝-镁合金生产线材,特别是细丝材时,由于加工硬化 相似文献
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