SU1397532A1 - Steel - Google Patents

Abstract

The invention relates to steels for the manufacture of castings of complex configuration, in particular the sides of the tractor. The purpose of the invention is to improve the technological properties and plastic characteristics of the alloy, which is achieved by the additional introduction of boron, yttrium and tellurium into the head. Steel has the following chemical composition, wt.%: Carbon 0,27-0,35 silicon 0,20-0,52; manganese 0.40-0.90; vanadium 0.06-0.15; boron 0,002-0,012; yttrium 0.01-0.07, tellurium 0.001-0.01; iron - steel The properties of the steel are as follows: tensile strength 325–345 MPa, yield strength 555–580 MPa, relative elongation 18–19%, relative narrowing 35–37%. B casting one crack. 2 tab. yu (L

Description

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The invention relates to metallurgy, namely, steel for the manufacture of castings of complex configuration, in particular the sides of the tractor.

The purpose of the invention is to increase the technological properties and plastic characteristics of the proposed steel.

The chemical composition of the investigated bottoms of the proposed and known steels is given in Table 1.

The details of the configuration similar to the sides of the tractor are molded from steel, alley in terrestrial forms. Details are checked for the presence of trepdan, and then templates are selected from the places of the most complex configuration, which examine the heterogeneity of chemical elements (carbon, manganese), as well as the mechanical properties after thermal processing (normalization from separate heating at 920 ° C),

The results of the surveys are presented in the scoreboard2.

Analysis of the research results showed that the introduction of modifying additives of boron, yttrium and tellurium to steel significantly increases the viscosity of steel, and also increases the uniformity of distribution of chemical elements throughout the volume

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Thus, not only does it improve the uniformity of properties, but it also largely prevents the formation of cracks.

Using the proposed steel for casting the sides of the tractor will not only increase the yield in their manufacture, but also significantly increase the reliability and durability of the products.

Claims (1)

Formula A shadow Steel, mainly for castings, containing carbon, silicon, manganese, vanadium and iron, is of great concern that, in order to penetrate technological properties, in particular characteristics, it additionally contains boron, yttrium and tellurium in the following ratio of ingredients , wt.%: 0.27-0.35 0.20-0.52 0.40-0.90 0.06-0.15 thirty Carbon Silicon Manganese Vanadium Boron Yttrium Tellurium Iron 0,002-0,012 0,01-0,07 0,001-0,010 Remaining Table 1 Known 0.30 0.32 Pred0, 86 0.09 Rest