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本文研究了含碳、氧、硫、铝、钙和锶孕育剂对铁水化学成份为C2．9~3．0%,Si1．6~1．7%,Mn0．3%,S0．01%和P0．02%铸铁凝固期间片状石墨形成的影响。每组熔炼中同时纪录一个陶瓷型中的4块试样的冷却曲线。比较了用不同的型内孕育剂与不孕育试样的过冷特性和显微组织。研究表明:铸铁的孕育效果反映在初生奥氏体技晶,共晶团数,石墨及共晶渗碳体的数量和分布以及基体中铁素体同珠光体的比值方面。用光学显微镜测定了这些组织影响的大小。将其结果与铸铁凝固期间的过冷特性作了比较。
In this paper, the effects of carbon in, oxygen, sulfur, aluminum, calcium and strontium inoculants on the chemical constituents of molten iron were investigated. The chemical composition of molten iron was C2.9-3.0%, Si1.6-1.7%, Mn0.3%, S0.01% Effect of P 0.02% Cast Iron on the Formation of Flake Graphite During Solidification. Record the cooling curve of four samples in one ceramic type simultaneously in each batch of smelting. The undercooling characteristics and microstructure of different inoculants and inoculation samples were compared. The research shows that the inoculation effect of cast iron is reflected in the primary austenite technology, the number of eutectic clusters, the number and distribution of graphite and eutectic cementite, and the ratio of ferrite to pearlite in the matrix. The effect of these tissues was measured by light microscopy. The results were compared with the overcooling characteristics of cast iron during solidification.