Forgeable ferrite cast iron

Abstract

The invention relates to forgeable ferrite cast iron, which is characterized by comprising the following components by weight percent: 95.00 to 95.50 percent of iron, 2.30 to 2.55 percent of carbon, 1.50 to 1.80 percent of silicon, 0.45 to 0.65 percent of manganese, less than 0.20 percent of sulfur, less than 0.06 percent of phosphorus, 0.005 to 0.012 percent of bismuth and less than 0.06 percent of chromium. According to the principle of low carbon, medium or high silicon, reasonable manganese and sulfur ratio, strict control of bismuth and chromium, and as low phosphorus and sulfur as possible, the forgeable ferrite cast iron mixed according to the proportioning proposal has better mechanical property and machining property.

Description

technical field [0001] The invention relates to an alloy material, in particular to a ferritic malleable cast iron. Background technique [0002] The content of various elements in ferritic malleable cast iron directly affects its intrinsic quality, but no better ratio scheme has been found in the prior art. Contents of the invention [0003] The object of the present invention is to provide a ferritic malleable cast iron with better mechanical properties and processability. [0004] A ferritic malleable cast iron according to the present invention is characterized in that its composition is 95.00% to 95.50% of iron, 2.30% to 2.55% of carbon, 1.50% to 1.80% of silicon, and 0.45% to 0.65% of manganese by weight. %, less than 0.20% of sulfur, less than 0.06% of phosphorus, less than 0.005% to 0.012% of bismuth, and less than 0.06% of chromium. [0005] According to the principle of "low carbon, medium and high silicon, reasonable manganese-sulfur ratio, strict control of b...

AI Technical Summary

Problems solved by technology

[0002] The content of various elements in ferritic malleable cast iron directly affects its intrinsic quality, but no better ratio scheme has been found in the prior art