SU1294870A1 - Steel - Google Patents

Abstract

The invention relates to metallurgy, in particular, to the composition of steel used in the manufacture of crusher cheeks, and excavator bucket teeth. tracked tracks. The purpose of the invention is to increase the fracture toughness and mechanical properties of steel. This is achieved by the fact that the steel additionally contains rare-earth metals in the following ratio of components, wt%: carbon 1.25-1.4; manganese 12-15.0; silicon 0.3-1.0; chromium 1.1-1.3; Nickel 0.85-1.0; molybdenum 0.3-0.6; titanium 0.02-0.03; vanadium 0.018– 0.125; niobium 0.06-0.1; rare earth metals 0,015-0,08; iron else. Increasing the fracture toughness and mechanical properties provides a higher crack resistance of the steel, which increases the service life of the manufactured parts by 1.2-1.3 times. 2 tab. with (L

Description

reduce the number of deficient elements introduced into steel, such as niobium and titanium.

The mechanical properties of the steel are determined on cylindrical samples according to GOST 1497-73.

The chemical composition of the steel, fracture toughness and mechanical properties are given in Table. 1 and 2.

ten

The invention relates to metallurgy, in particular, to the composition of high-alloyed steel with special properties used in the manufacture of crusher cheeks, excavator bucket teeth, tracked tracks.

The aim of the invention is to increase the fracture toughness and the mechanical properties of the steel.

The introduction of rare earth metals into the steel at a selected ratio of the remaining elements leads to a fracture toughness and mechanical properties due to grinding -

austenitic grain, coagulation, and equal parts to be 1.2-1.3 times, the measured distribution of the carbide phase over the grain body. In addition, the addition of rare earth metals reduce the number of non-metallic inclusions on, .... . .. the grain boundaries, which contributes to the end, silicon, chromium, nickel, molybdenum, the viscosity of destruction. The introduction of titanium, vanadium, niobium, iron, and r-rare-earth metals in quantities less than 0.015 wt.% Does not have a significant effect on viscosity.

destruction, as well as on the strength

and plastic characteristics, exceeding the specified limit

(introduction of rare earth metals

in quantities greater than 0.08 wt.%)

does not provide strength 30

properties. In addition, the increase in the content of rare earth metals

more than 0.08 wt.% leads to the release of intermegallide compounds

R f

25

Increased fracture toughness and mechanical properties provide higher crack resistance of steel, which increases the service life of the invention. Formula of the invention Steel containing carbon is margaly so that, in order to increase fracture toughness and mechanical properties, it additionally contains rare earth metals in the following ratio of components wt.%:

Carbon

Manganese

Chromium

Nickel

Molybdenum

Titanium

X, as well as precipitation of rare-earth carbides, as a result of which the fracture viscosity and ductility decrease. Additional alloying of steel with rare earth metals allows

Vanadium

Niobium

Rare earth

metal.y

Iron

1.25-1, D

12.0-15.0 0.3-1.0 1, H1.3

0.85-1.0 0.3-0.6

0.02-0.03 0.018-0.125

0.06-0.1

0.015-0.08 Else Table 1

Chemical composition, mas.2 steel. С Т ИП Т Si I Сг Hi Т МО 1 Т1 Т Т Г Т Г М Т Fe

SostayO.

Value offer

 , ГЬ15,00,31,3J), 85

2t, 4 "21,01,1,0

31,35130,71,20,9

With beyond the H1 content of components

0.6 0.02 0.3 0.03

0.125 O, 012 0.1 0.023 0.08 0.018 0.02 0.06 0.05 0.05 0.015

0.5 0.025 0.063 0.015 0.08 0.03 0.035

1.52 15.3 1.26 1.4 1.3 1.18 10.6 0.25 1.0 0.7

0.7 0.038 0.132 0.022 0.12 0.054 0.1 0.2 0.0177 0, 014 0.011 0.03 0.02 .0.012

Famous

1.3 U, 2 0.6 1.0 0.92 0.4 0.12

Sulfur and phosphorus are also contained in steel as impurities.

reduce the number of deficient elements introduced into steel, such as niobium and titanium.

The mechanical properties of steel are determined on cylindrical samples according to GOST 1497-73.

The chemical composition of the steel, fracture toughness and mechanical properties are given in Table. 1 and 2.

-

Increasing the fracture toughness and mechanical properties provides a higher crack resistance of steel, which increases the service life of manufactured parts by 1.2-1.3 times, .... . .., silicon, chromium, nickel, molybdenum, en, vanadium, niobium, iron, o t-

Claims (1)

Claims of Carbon Steel, Marga-5 cast parts 1.2-1.3 times, .... . .. 0 natz, silicon, chromium, nickel, molybdenum, titanium, vanadium, niobium, iron, o t- thirty five characterized in that, in order to increase the fracture toughness and mechanical properties, it additionally contains rare earth metals in the following ratio, wt.%: Carbon Manganese Chromium Nickel Molybdenum Titanium 35 Vanadium Niobium Rare earth metal.y Iron 1.25-1, D 12.0-15.0 0.3-1.0 1, H1.3 0.85-1.0 0.3-0.6 0.02-0.03 0.018-0.125 0.06-0.1 0.015-0.08 Else Table 1 0.125 O, 012 0.1 0.023 0.08 The balance 0.018 0.02 0.06 0.05 0.05, 26 0.03. 0.35 0.6 Compiled by V. Brostrem Editor N. Lazarenko Tehred I.Popovich Proofreader A. Obruchar Order 565/29 Circulation 605 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5 Production and printing company, Uzhgorod, st. Project, 4 table 2 Podlisnoe