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锰灰铸铁是一种强度高、耐磨、附液压的新材料。据报导,含锰1.5～3.0％且锰大于硅的灰铸铁,具有断口特别致密、加工性能好、抗生长快好,耐磨和耐液压等优点,特别适宜于制造耐磨类零件、液压件和机床类另件。我厂生产的高压泵体壳要求承压高,如溢流阀加工后最薄壁厚为5mm左右,液压试验规定需承压480kg/cm~2,10分钟内无渗漏。该件内孔无法铸出,是由50～60mm的实心体加工而成的。原工艺用湿型铸造,M级铸铁,长期存在渗漏问题。198年改用锰灰铸铁材质
Manganese gray cast iron is a high strength, wear-resistant, with hydraulic new material. It has been reported that cast iron with manganese content of 1.5-3.0% and manganese greater than silicon has the advantages of particularly compact fracture surface, good processability, fast growth resistance, abrasion resistance and hydraulic resistance. It is particularly suitable for manufacturing wear-resistant parts, hydraulic parts And another piece of machine tools. I plant the production of high pressure pump body shell requires high pressure, such as the relief valve after processing the thinnest wall thickness of about 5mm, hydraulic test pressure 480kg / cm ~ 2, 10 minutes no leakage. The hole can not cast the hole, is a 50 ~ 60mm solid body made of. The original process with wet casting, M-class cast iron, there is a long-term leakage problems. 198 year to use manganese gray cast iron material