我厂在制造300吨摩擦压力机过程中,大胆采用球墨铸铁代替45#钢制造压力机的横梁取得成功。经一年多使用,效果良好。一、球铁横梁的机械性能及金相组织 300吨压力机球铁横梁(见照片4)重达3吨,在机械性能方面,不但要求有较高的强度和硬度,而且要求有较高的冲击韧性和延伸率。 I plant in the manufacture of 300 tons of friction press, the bold use of ductile iron instead of 45 # steel manufacturing presses beam success. After more than a year, the effect is good. First, the mechanical properties of ductile beams and microstructure 300 tons of press Ductile iron beams (see photo 4) weighing 3 tons, in terms of mechanical properties, not only requires higher strength and hardness, but also requires a higher Impact toughness and elongation.