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自行车飞轮中的飞壳,是由低碳钢(牌号BD2F、BD3F)制成,其热处理技术要求为:渗碳层深0.30～0.50毫米,硬度HRA≥75。要满足表面耐磨、心部有一定韧性的使用性能要求。我厂自生产飞轮以来,没有沿用氰盐液体渗碳老工艺,而采用了气体渗碳工艺。根据飞壳的服役条件,我们认为飞壳是飞轮中的易损件,要进一步提高其使用寿命,关键在于提高飞壳的耐磨性。根据现有设备条件,对飞壳进行了滴注式气体碳氮共渗试验。通过试制和批量生产,已取得良好效果。
Flywheel flywheel shell is made of low carbon steel (BD2F, BD3F) made of its heat treatment technology requirements: Carburized depth 0.30 ~ 0.50 mm, hardness HRA ≥ 75. To meet the surface wear, the heart has a certain toughness of the use of performance requirements. I plant since the production of flywheel, there is no use of cyanide liquid carburizing the old process, and the use of gas carburizing process. According to the service conditions of the flying shell, we think the flying shell is a wearing part in the flywheel. To further improve its service life, the key is to improve the wear resistance of the flying shell. According to the existing equipment conditions, the fly shell was dripped gas carbonitriding test. Through trial production and mass production, has achieved good results.