RU2448185C1 - Cast iron - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: cast iron contains the following components, wt %: carbon 3.5-4.0; silicon 0.8-1.2; manganese 0.8-1.2; chrome 0.1-0.15; barium 0.001- 0.002; vanadium 1.2-1.4; molybdenum 0.2-0.3; boron 0.09-0.13; stannum 0.001-0.002; indium 0.001-0.002; antimony 0.001-0.002 and iron is the rest.

EFFECT: increasing cast iron thermal resistance.

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Description

The invention relates to the field of metallurgy, and in particular to compositions of cast iron, which can be used in the manufacture of products operating under thermocyclic loads.

Known cast iron composition, wt.%: Carbon 2.5-4.0; silicon 0.8-2.5; manganese 0.3-1.5; chrome 0-1.5; barium 0-0.2; vanadium 0-1.0; molybdenum 0-0.8; iron - the rest [1].

The objective of the invention is to increase the heat resistance of cast iron.

The technical result is achieved by the fact that cast iron containing carbon, silicon, manganese, chromium, barium, vanadium, molybdenum, iron, additionally contains boron, tin, indium and antimony in the following ratio of components, wt.%: Carbon 3,5-4, 0; silicon 0.8-1.2; manganese 0.8-1.2; chrome 0.1-0.15; barium 0.001-0.002; vanadium 1.2-1.4; molybdenum 0.2-0.3; boron 0.09-0.13; tin 0.001-0.002; indium 0.001-0.002; antimony 0.001-0.002; iron is the rest.

The table shows the composition of cast iron.

Table Components Composition, wt.%: one 2 3 Carbon 3,5 3,7 4.0 Silicon 1,2 1,0 0.8 Manganese 1,2 1,0 0.8 Chromium 0.1 0.13 0.15 Barium 0.002 0.0015 0.001 Vanadium 1,2 1.3 1.4 Molybdenum 0.3 0.25 0.2 Boron 0.09 0.11 0.13 Tin 0.001 0.0015 0.002 Indium 0.002 0.0015 0.001 Antimony 0.001 0.0015 0.002 Iron rest rest rest Heat resistance cycles not less than 170 not less than 170 not less than 170

The increase in heat resistance of cast iron is achieved due to the manifestation of the complex influence of the components present in its composition. Manganese inhibits the release of graphite, contributes to the grinding of perlite. The combined introduction of vanadium and molybdenum strengthens the metal base of cast iron. Carbides are stabilized by boron and chromium. Barium acts as a deoxidizing agent. Tin, indium and antimony contribute to the grinding of grain, prevent the formation and development of cracks at temperature extremes.

Cast iron is smelted in electric furnaces and molds are cast. The castings are subjected to low-temperature annealing at a temperature of 600 ° C to relieve linear stresses.

Information sources

1. JP 61-026754 A, C22C 37/08, 1986.

Claims (1)

Cast iron containing carbon, silicon, manganese, chromium, barium, vanadium, molybdenum, iron, characterized in that it additionally contains boron, tin, indium and antimony in the following ratio of components, wt.%: Carbon 3,5-4,0 ; silicon 0.8-1.2; manganese 0.8-1.2; chrome 0.1-0.15; barium 0.001-0.002; vanadium 1.2-1.4; molybdenum 0.2-0.3; boron 0.09-0.13; tin 0.001-0.002; indium 0.001-0.002; antimony 0.001-0.002; iron is the rest.