High-yield-point white cast iron and manufacturing method thereof
A technology of white cast iron and manufacturing method, which is applied in the field of iron-carbon alloy, can solve problems such as failure, achieve the effect of improving yield point, improving mechanical properties, and meeting alternating loads
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[0020] The present invention will be further described below:
[0021] High yield point white cast iron, the chemical composition of white cast iron is as follows: C 7.7%~18%, Si 3%~15%, Mn 3.5~6.5%, P<0.006%, S<0.005% , the rest is Fe.
[0022] Its manufacturing method of high yield point white cast iron comprises the following steps:
[0023] (1) Preparation materials: C is 15%, Si is 10%, Mn is 5%, P<0.006%, S <0.005%, and the rest is Fe;
[0024] (2) Prepare the pouring model and open the sprue;
[0025] (3) putting the Fe in the step (1) into an induction furnace to melt to obtain liquid molten iron with a melting temperature of 1460-1510°C;
[0026] (4) Put 15% of C, 10% of Si and 5% of Mn in the molten iron in order to form liquid white cast iron;
[0027] (5) Liquid white cast iron is injected into the model;
[0028] (6) Heat preservation of liquid white cast iron, the heat preservation temperature shall not be lower than 650°C, and the heat preservation time sha...
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