【摘要】 为提高球铁曲轴材料的综合性能,试验了下列措施:①采用感应炉熔炼,净化铁液;②选用合理的化学成分,加入适量的Cu、Mo合金元素;③选用低稀土球化剂FeSiMg8RE3;④采用盖包球化处理法和复合孕育处理;⑤采用部分奥氏体化正火处理。结果是25 mm厚Y试块的σb达到836.6～844.6 MPa,δ达到5.2%～7.4%。更多还原

【Abstract】 With the purpose to increase comprehensively properties of nodular iron for making crankshafts,the following measures were tried: a) melting in induction furnace;b) adopting proper chemical composition,and adding proper amount of Cu and Mo as alloying elements;c) adopting low rare earth content nodularizing alloy FeSiMg8RE3;d) adopting Tundish ladle nodularizing process and compound inoculation;e) adopting normalizing treatment with incomplete austenizing heating.As a result,the comprehensive mechanical properties of 25 mm Y-block reached: σ b 836.6～844.6 MPa,δ 5.2%～7.4%.更多还原