Compacted graphite cast iron alloy and its method of making
AssigneeSinterCast AB
InventorBertil Isak Hollinger
Life of this patent
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Abstract
A process for producing a compacted graphite iron (CGI) article, comprising the steps of: (a) providing a CGI base iron having a composition comprising, in weight percentages, about 3.2 to 3.8 total C, 2.8 to 4.0 Si and the balance at least Fe and incidental impurities; (b) treating, controlling and casting the alloy in a manner known per se; (c) allowing the cast component to cool in the mould to a temperature of at least 775° C.; (d) cleaning the casting in a manner known per se and machining the casting to produce a finished article.
Claims8
A process for producing a finished article of compacted graphite iron (CGI) comprising:
- providing a CGI base iron, comprising, in weight percentages, about 3.2 to 3.8 total C, 2.8 to 4.0 Si, and the balance Fe and incidental impurities;
- treating, controlling and casting the CGI alloy;
- allowing the casting to cool in the mould to a temperature less than or equal to 775° C.;
- cleaning the casting;
- and
- machining the casting, by at least one of high speed boring, turning, milling, drilling, tapping and honing, to produce the finished article.
A finished article of compacted graphite iron (CGI), the article being obtained by:
- providing a CGI base iron, comprising, in weight percentages, about 3.2 to 3.8 total C, 2.8 to 4.0 Si, and the balance Fe and incidental impurities;
- treating, controlling and casting the CGI alloy;
- allowing the casting to cool in the mould to a temperature less than or equal to 775° C., cleaning the casting;
- and
- machining the casting, by at least one of high speed boring, turning, milling, drilling, tapping and honing, to produce the finished article.
A process for producing a finished article of compacted graphite iron (CGI) alloy comprising:
- providing a CGI base iron comprising, in weight percentages, about 3.2 to 3.8 total C, 2.8 to 4.0 Si, and the balance Fe and incidental impurities;
- treating, controlling and casting the CGI alloy;
- allowing the cast component to cool in the mould to a temperature less than or equal to 775° C.;
- cleaning the casting;
- and
- machining the casting, by high speed boring at a speed greater than 600 m/min, to produce the finished article.
Dependencies are inferred from the claim text.