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氮化硅陶瓷球Silicon nitride ceramic balls
发布日期:2018-8-23 
氮化硅陶瓷球Silicon nitride ceramic balls

轴承用氮化硅陶瓷球

氮化硅陶瓷球是一种非氧化气氛下的高温烧结高精度陶瓷。它具有高强度、高耐磨性、耐高温、耐腐蚀、耐酸碱、长期使用于海水、电绝缘等特点。性能良好。在800°C时,其强度和硬度几乎不变,其密度为3.20 g/cm 3,约为轴承钢重量的1/3,旋转时的离心力较小。可以实现高速运行。它还具有自润滑性能,可用于无润滑的高污染环境。成为陶瓷轴承和混合陶瓷球轴承的首选球。

陶瓷球的优点:

1。高硬度:普通GCr15轴承钢的维氏硬度为800 HV,氮化硅陶瓷球的硬度大于1700 HV

2、高耐磨性:以加工产品的加工为例,普通钢球铣削加工(剩余量为1毫米)约2-4小时,而氮化硅球加工至少需要150200小时。

3、耐腐蚀性:陶瓷材料的稳定性是最突出的,尤其是氮化硅球,几乎不与任何物质发生化学反应,广泛应用于石油、化工、食品等行业,需要接触强氧化剂和强还原剂。.

4、耐高温:陶瓷球在烧结过程中经历了几千摄氏度的高温高压,其内部分子结构非常稳定,排列非常密集,这使得其热膨胀系数很低。RCs改变其结构尺寸几乎没有效果。陶瓷球可以在1200摄氏度或更高的温度下工作,低温对它们的影响很小,因此它们广泛应用于航空航天工业。

5、重量轻:陶瓷球重量仅为普通钢球的50%60%,在轴承和航空航天领域有着广阔的应用前景。

6。自润滑:陶瓷球本身具有良好的自润滑性能,加工精度高。可达到G5G10级、耐磨、结构稳定、不易变形的陶瓷球,可应用于许多特殊行业。

7。绝缘:陶瓷具有良好的绝缘效果。

Silicon nitride ceramic balls for bearings
Silicon nitride ceramic balls are high temperature sintered high precision ceramics under non oxidizing atmosphere. It has high strength, high wear resistance, high temperature resistance, corrosion resistance, acid and alkali resistance, long-term use in seawater, electrical insulation and other characteristics. Good performance. At 800 degrees C, the strength and hardness are almost unchanged, the density is 3.20 g/cm 3, about 1/3 of the weight of bearing steel, and the centrifugal force is small when rotating. It can run at high speed. It also has self lubricating properties and can be used in non lubricating and highly polluting environments. It becomes the preferred ball for ceramic bearings and hybrid ceramic ball bearings.
The advantages of ceramic balls are:
1. High hardness: The Vickers hardness of common GCr15 bearing steel is 800 HV, and the hardness of silicon nitride ceramic ball is more than 1700 HV.
2. High wear resistance: Take the processing of processed products as an example, ordinary steel ball milling (the residual is 1 mm) about 2-4 hours, and silicon nitride ball processing at least 150-200 hours.
3. Corrosion resistance: the stability of ceramic materials is the most prominent, especially silicon nitride spheres, almost no chemical reactions with any substances, widely used in petroleum, chemical, food and other industries, need to contact strong oxidants and reducing agents. .
4. High temperature resistance: Ceramic balls undergo high temperature and pressure of several thousand degrees Celsius during sintering. The internal molecular structure is very stable and the arrangement is very dense, which makes the thermal expansion coefficient very low. RCs has little effect in changing its structural size. Ceramic balls can work at 1200 degrees Celsius or higher, and low temperatures have little effect on them, so they are widely used in the aerospace industry.
5. Light weight: The weight of ceramic balls is only 50%-60% of that of ordinary steel balls. It has broad application prospects in bearing and aerospace fields.
6. Self lubrication: ceramic ball itself has good self-lubricating property and high machining accuracy. It can reach G5, G10, wear-resistant, stable structure, not easy to deform ceramic balls, can be used in many special industries.
7. Insulation: ceramic has good insulation effect.
   

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