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通过调整高碳当量灰铸铁中锰和硫含量,研究了锰硫比对其组织和力学性能的影响。结果表明,在本试验研究范围内,不同Mn/S高碳当量灰铸铁的微观组织均由A型石墨、珠光体和少量碳化物组成。随Mn含量的增加,石墨细化,珠光体片间距减小。Mn/S=14.7时,比例适中,A型石墨整体大小均匀。随着Mn/S增加,细小石墨增多,布氏硬度增大,抗拉强度先减小后增大。
By adjusting the content of manganese and sulfur in high carbon equivalent gray cast iron, the effect of Mn and S ratio on the microstructure and mechanical properties was studied. The results show that the microstructure of gray cast iron with different Mn / S high carbon equivalent weights is composed of type A graphite, pearlite and a few carbides within the scope of this study. With the increase of Mn content, graphite refinement, pearlite sheet spacing decreased. Mn / S = 14.7, the proportion of moderate, A-type graphite overall size. With the increase of Mn / S, fine graphite increased, Brinell hardness increased, the tensile strength first decreased and then increased.