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佛山液压件厂是生产各种压力阀、方向阀和流量阀的专业厂,过去铸件质量差,废品率高,后经晶粒细化处理和铸造工艺上的改进,产品质量有所提高,此后采用HT25—47铸铁生产工作压力为63 kg/cm~2的液压件,用HT30—54铸铁生产工作压力为70—320kg/cm~2的液压件,但由于HT30—54的碳硅含量低,收缩大、流动性大、补缩效果差,铸造较大的阀体,往往因缩裂或晶间疏松而报废。蠕虫状石墨铸铁具有比灰铸铁的强度高、壁厚敏感性小、耐磨,比球墨铸铁的铸造
Foshan Hydraulic Parts Factory is specialized in producing all kinds of pressure valves, directional valves and flow valves. In the past, the casting quality was poor and the rejection rate was high. After the grain refinement and the improvement of the casting process, the product quality improved. The HT25-47 cast iron is used to produce the hydraulic part with the working pressure of 63 kg / cm ~ 2. The hydraulic part with the working pressure of 70-320kg / cm ~ 2 is produced by the HT30-54 cast iron. However, due to the low carbon-silicon content of the HT30-54, Shrinkage, mobility, shrinkage effect is poor, casting a larger valve, often due to shrinkage or interstitial loose and scrapped. Worm-like graphite cast iron has a higher strength than gray cast iron, wall thickness sensitivity is small, wear-resistant, casting than ductile iron