An introduction was made on the technical requirements of vermicular graphite iron,detailed description was given to the wire injection-related parameters setting and process control of using cerium-based light rare earth wire to produce brake drum and problem of vermicularizing degeneration.Under the condition of other chemical compositions being basically unchanged,through using Y-based heavy RE having more strong vermicularizing effect and anti-degeneration capacity to replace Ce-based light RE,made the metallurgical structure to meet requirements,graphite was mainly vermicular shape,vermicularizing rate≥50％,no flake graphite,matrix structure being mainly pearlite+ferrite,free carbide ≤ 1％,free carbide+phosphide eutectic≤4％,and the mechanical properties being qualified.
关键词
蠕墨铸铁/制动鼓/蠕化衰退/钇基重稀土
Key words
vermicular graphite iron/brake drum/vermicularizing degeneration/Y-based heavy RE
维普
万方数据