高强度灰铸铁通常是在熔炼中将含碳、硅量较低的铁液过热到比较高的温度(1400℃以上),然后按生产孕育铸铁的正常工艺在出铁槽中加入孕育剂,使其经孕育处理来获得高强度铸铁。我厂生产出口加拿大、美国的轿车制动盘,共计28个品种,力学性能要求为:抗拉强度σ_b≥270MPa;硬度≥197～251HB。由于目前原材料供应厂家多、牌号复 High-strength gray cast iron is usually in the melting of carbon, silicon content of the lower liquid iron overheating to a relatively high temperature (1400 ℃ above), and then according to the normal production process of cast iron in the tundra by adding inoculant, It is bred to get high strength cast iron. I plant exports to Canada, the United States car brake discs, a total of 28 varieties, mechanical properties required for: tensile strength σ_b ≥ 270MPa; hardness ≥ 197 ~ 251HB. Due to the current supply of raw materials manufacturers, complex grades