Method of producing thin-walled castings
OwnerBoris Pavlovich Platonov, Anton Abramovich Ryzhikov +1inventors
InventorsBoris Pavlovich Platonov, Anton Abramovich Ryzhikov, Jury Borisovich Platonov
Life of this patent
Estimating the term…
Abstract
A method of producing castings comprising the steps of: pouring moulds with inoculated cast iron containing, by weight per cent: carbon 3.6-3.8, silicon 2.8-3.2, manganese up to 0.4, magnesium not more than 0.01, at a melt temperature ranging from 1420.degree. to 1450.degree. C, and subsequently cooling the cast iron. The thickness of walls of the castings is chosen so that the initial cooling rate is 10.degree.-14.degree. C/sec with a preset heat conductivity.
Claims1
A method of producing castings having thin walls and thick walls comprising the steps of:
- pouring inoculated cast iron consisting essentially of, by weight, 3.6-3.8% carbon, 2.8-3.2% silicon, up to 0.4% manganese, not more than 0.01% magnesium and the remainder being iron at a melt temperature within the range of from 1420.degree. to 1450.degree. C into moulds;
- and subsequently cooling portions of the cast iron with thin walls of the castings being up to 3 mm that the initial cooling rate is 10.degree.-14.degree. C/sec to form nodular cast iron in the thin-walled portions and simultaneously cooling portions of the cast iron with thick walls of the castings of a thickness that the initial cooling rate is 1.degree.-4.degree. C/sec to form gray cast iron in the thick-walled portions.
Dependencies are inferred from the claim text.