RU2635031C1 - Cast iron - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention relates to compositions of cast iron which can be used in machine-tool industry, mechanical engineering, in production of products of household purposes. Cast iron contains, wt %: carbon 2.0-2.9; silicon 1.0-1.7; manganese 0.1-0.5; magnesium 0.005-0.01; copper 1.7-2.1; praseodymium 0.07-0.11; niobium 0.45-0.55; aluminium 0.1-0.16; cobalt 2.7-3.1; rhenium 0.2-0.3; iron is the rest.

EFFECT: increased strength of cast iron.

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Description

The invention relates to the field of ferrous metallurgy, in particular to compositions of cast iron, which can be used in machine tools, mechanical engineering, in the production of household goods.

Known cast iron of the following composition, wt.%: Carbon 2.0-2.9; silicon 1.0-1.7; manganese 0.1-0.5; magnesium 0.01-0.05; copper 0.4-0.7; yttrium 0.01-0.04; praseodymium 0.02-0.05; niobium 0.05-0.25; aluminum 0.05-0.2; iron - the rest [1].

The objective of the invention is to increase the strength of cast iron.

The technical result is achieved by the fact that cast iron containing carbon, silicon, manganese, magnesium, copper, praseodymium, niobium, aluminum, iron, additionally contains cobalt and rhenium in the following ratio of components, wt.%: Carbon 2.0-2.9; silicon 1.0-1.7; manganese 0.1-0.5; magnesium 0.005-0.01; copper 1.7-2.1; praseodymium 0.07-0.11; niobium 0.45-0.55; aluminum 0.1-0.16; cobalt 2.7-3.1; rhenium 0.2-0.3; iron is the rest.

The table shows the composition of cast iron.

In the composition of cast iron, the components manifest themselves as follows. Cobalt, rhenium, copper, niobium increase the strength characteristics of the alloy. Aluminum, magnesium, praseodymium deoxidize the alloy.

Cast iron is smelted in blast furnaces and centrifugally cast in hot (400-500 ° C) metal molds coated with refractory clay. Castings are subjected to normalization at a temperature of 900-950 ° C and tempering at a temperature of 350-450 ° C.

Information sources

1. SU 1313887, C22C 37/10, 1987.

Claims (1)

Cast iron containing carbon, silicon, manganese, magnesium, copper, praseodymium, niobium, aluminum and iron, characterized in that it additionally contains cobalt and rhenium in the following ratio of components, wt.%: Carbon 2.0-2.9; silicon 1.0-1.7; manganese 0.1-0.5; magnesium 0.005-0.01; copper 1.7-2.1; praseodymium 0.07-0.11; niobium 0.45-0.55; aluminum 0.1-0.16; cobalt 2.7-3.1; rhenium 0.2-0.3; iron is the rest.