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首页> 外文期刊>Engineering Dimensions >Hard surface = a long life!
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Hard surface = a long life!

机译：坚硬的表面=使用寿命长！

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摘要

When Somerset pump manufacturer Marshalsea Hydraulics sought to increase its share of the offshore oh industry market, the company realised that to achieve this ft would need to extend the service life of its pumps. The pistons and seals of these pumps face severe demands, working at pressures in excess of 700 bars to supply equipment submerged at depths of 3000 metres or more. Marshalsea decided to coat the piston stems with Titanium Nitride (TiN) after plasma nitriding to ensure the coating has adequate support. With a hardness of more than 2000 HV, and extremely low coefficient of friction, the super-smooth TiN coating applied by Tecvac Limited quadrupled the average service life of the piston/seal assembly, for less than 3 per cent of the pump cost. This is a typical example of how advanced hard coatings can improve the performance of components in a "rubbing wear" situation. The idea is not new - hard chromium plate was known in the 19th Century, for example, but modem techniques such as PVD (Physical Vapour Deposition) have extended the range of metals and compounds that can be deposited, offering engineers a wide range of existing properties and finishes.
机译：当萨默塞特泵制造商Marshalsea Hydraulics寻求增加其在海上工业市场中的份额时，该公司意识到要实现这一目标，就需要延长其泵的使用寿命。这些泵的活塞和密封件面临着苛刻的要求，它们要在超过700巴的压力下工作，以供应沉入3000米或以上深度的设备。 Marshalsea决定在等离子氮化后用氮化钛（TiN）涂覆活塞杆，以确保涂层具有足够的支撑力。 Tecvac Limited所涂覆的超光滑TiN涂层具有超过2000 HV的硬度和极低的摩擦系数，其活塞/密封组件的平均使用寿命是原来的四倍，而成本却不到泵的3％。这是高级硬质涂层如何在“摩擦磨损”情况下改善组件性能的典型示例。这个想法并不新鲜-例如19世纪就已经知道硬铬板，但是诸如PVD（物理气相沉积）之类的现代技术扩展了可以沉积的金属和化合物的范围，为工程师提供了广泛的现有技术。属性和完成。

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