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石墨钢铸件可采用熔模铸造法在高温陶瓷型中浇注成型。铸件在型中缓冷时,大于共析成分的碳以石墨形态析出。提高硅含量并经相应的变质处理后,铸件可不进行石墨化退火。 本实验研究了热处理对铸造石墨钢机械性能和耐磨性的影响。 所研究的石墨钢成分:1.1～1.4％C,1.6～2.0％Si,0.4～0.6％Mn。在予热到500～600℃的陶瓷铸模中浇注的铸件,其铸态组织即铁素体—珠光体或珠光体基体和0.5～0.8％的球状石墨没有二次渗碳体。
Graphite steel castings can be cast in high temperature ceramic casting molding. Casting slow cooling in the type, greater than the eutectoid composition of carbon precipitated graphite. Improve the silicon content and the corresponding modification, the casting can not be graphitized annealing. The experiment studied the heat treatment on the mechanical properties and wear resistance of cast graphite steel. The studied graphite steel components were 1.1-1.4% C, 1.6-2.0% Si and 0.4-0.6% Mn. Castings which are cast in ceramic molds preheated to 500-600 ° C have no as-cast secondary cementite in the as-cast microstructure of ferrite-pearlite or pearlite matrix and 0.5-0.8% of spherical graphite.