氧化铬5.2比重2.5莫氏硬度，增强摩擦力，因为高价格因而在世界的大多数地方不流行的。
Chromium Oxide Specific gravity 5.2, Moh hardness 2.5 Enhances friction, but not popular because of high price in most parts of the world.
对比分析了高速钢与高铬铁轧辊在热凸度、摩擦系数、氧化膜特征、抗事故性等方面的区别；
Some differences between the rolls of high-speed steel and high-chrome iron in hot crown, friction coellieient, characteristics of oxidative film and anti-accident and so on are analyzed.
本课题针对钛合金紧固件摩擦学性能的改善，将微等离子体氧化技术应用在钛合金紧固件表面改性上，以提高其可靠性和重复使用性。
In this paper, in order to improve reliability and repetitive-use properties of titanium fastening piece, microplasma oxidation method had been advanced on the surface technology.
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