RU2352679C1 - Steel - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: steel contains carbon, silicon, manganese, chromium, aluminium, yttrium, copper, barium, silver, beryllium and iron, at following ratio of components, wt %: carbon 0.06-0.1, silicon 0.2-0.4, manganese 0.3-0.5, chrome 0.3-0.5, aluminium 0.1-0.15, yttrium 0.03-0.08, copper 1.5-2.0, barium 0.008-0.012, silver 0.1-0.15, beryllium 0.001-0.003, iron - the rest.

EFFECT: steel plasticity increasing.

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Description

The invention relates to the field of metallurgy, in particular to compositions of steels that can be used in the automotive industry.

Known steel containing, wt.%: Carbon 0.12-0.1; silicon 0.01-0.1; manganese 0.3-0.6; chrome 2.0-2.5; aluminum 0.005-0.04; yttrium 0.0005-0.01; copper 0.01-0.25; barium 0.0005-0.01; iron the rest [1].

The objective of the invention is to increase the ductility of steel.

The technical result is achieved in that the steel containing carbon, silicon, manganese, chromium, aluminum, yttrium, copper, barium, iron, additionally contains silver and beryllium in the following ratio of components, wt.%: Carbon 0.06-0.1; silicon 0.2-0.4; manganese 0.3-0.5; chrome 0.3-0.5; aluminum 0.1-0.15; yttrium 0.03-0.08; copper 1.5-2.0; barium 0.008-0.012; silver 0.1-0.15; beryllium 0.001-0.003, iron - the rest.

The table shows the compositions of steel

Table Components Composition, wt.%: one 2 3 Carbon 0.06 0.08 0.1 Silicon 0.4 0.3 0.2 Manganese 0.5 0.4 0.3 Chromium 0.3 0.4 0.5 Aluminum 0.15 0.12 0.1 Yttrium 0,03 0.05 0.08 Copper 1,5 1.8 2.0

Table continuation Components Composition, wt.%: one 2 3 Barium 0.008 0.01 0.012 Silver 0.15 0.12 0.1 Beryllium 0.003 0.002 0.001 Iron rest rest rest Tensile strength, kg / mm ² ~ 100 ~ 100 ~ 100 Relative ~ 10 ~ 10 ~ 10 elongation,%

In steel, the components manifest themselves as follows. Chrome stabilizes carbides. Copper and silver harden the solid solution. Aluminum, yttrium and barium act as deoxidizers. Beryllium helps to chop grain.

Steel can be smelted using an acid converter (oxygen blast) process. The starting material for steelmaking is Bessemer cast iron and steel scrap.

Heat treatment of steel includes quenching at a temperature of 850 ° C in oil and tempering at a temperature of 530 ° C.

Information sources

1. JP 2005-133167, C22C 38/00, 2005.

Claims (1)

Steel containing carbon, silicon, manganese, chromium, aluminum, yttrium, copper, barium and iron, characterized in that it additionally contains silver and beryllium in the following ratio, wt.%:
carbon 0.06-0.1 silicon 0.2-0.4 manganese 0.3-0.5 chromium 0.3-0.5 aluminum 0.1-0.15 yttrium 0.03-0.08 copper 1.5-2.0 barium 0.008-0.012 silver 0.1-0.15 beryllium 0.001-0.003 iron rest