There are five main ways to improve the performance of gray cast iron，
Here we focus on the first way - the role of increasing the Si/C ratio:
one. The amount of pre-analyzed austenite increases,
which has the effect of strengthening the matrix;
two. The amount of graphite is correspondingly reduced,
which reduces the reduction and cutting effect of graphite;
three. The content of silicon in solid solution in ferrite increases,
which strengthens ferrite;
four. Due to the increase of silicon,
the white mouth tendency of molten iron is reduced;
five. The cutting performance is greatly improved;
six. The eutectic transition temperature is increased,
the pearlite is slightly coarsened,
and the excessive silicon-carbon ratio reduces the strength,
which is unfavorable for the strength performance;
seven. Shrinkage and leakage tendency may increase;
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Here we focus on the first way - the role of increasing the Si/C ratio:
one. The amount of pre-analyzed austenite increases,
which has the effect of strengthening the matrix;
two. The amount of graphite is correspondingly reduced,
which reduces the reduction and cutting effect of graphite;
three. The content of silicon in solid solution in ferrite increases,
which strengthens ferrite;
four. Due to the increase of silicon,
the white mouth tendency of molten iron is reduced;
five. The cutting performance is greatly improved;
six. The eutectic transition temperature is increased,
the pearlite is slightly coarsened,
and the excessive silicon-carbon ratio reduces the strength,
which is unfavorable for the strength performance;
seven. Shrinkage and leakage tendency may increase;
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