SU618441A1 - Iron - Google Patents

Description

one

Joining is related to metallurgy, in particular to finding pig iron making o-blades in yamers for cleaning castings and arutt wear-resistant parts.

Closest to the invention of the technical essence and achievable. The result is cast iron of the following chemical composition, weight%:

2.5-2.9

0,5-O, 8

0.4-O, 7

1.0-1.5

5, O-7.0

0.1-0.25

0.05-0.15 0, OO8-O, O18 Else flj.

A disadvantage of the known cast iron is low wear resistance, which is caused by the unsatisfactory ratio between the viscous - austenitic UN and temperamous inclusions of carbide phases. The predominance of the latter in the metal structure leads to an increase in the brittleness of the metal and its chipping during operation.

The aim of the invention is to increase the wear resistance of cast iron under conditions of abrasive wear and increase the impact strength.

The goal is achieved by the fact that cast iron containing carbon, diamond manganese, nickel, chromium, vanadium, tvtan, boron and iron, additionally soothes beryllium and carbide torn in the following ratios of components, weight,%:

2.5-3.0

Carbon Silicon 0.5-0.8 1.0-2.0 Manganese 1.5-2.8 Nickel 5.0-7.0 Chromium 0.1-O, 3

Vanadium 0.1-0.2 Titanium 0.005-0.0155 Bor 0.3-O, 5

Beryllium 1., 5 Tory carbide Else

5 Iron

For the smoothness of the iron and fragility of the cast iron and about the rise of time and self-resisting. bryllium and kari b a tori are introduced into its composition. Beryllium coagulates the carbides of chromium, vanadium, titava, and also forms self-contained carbides possessing

high hardness and goodness.

The lower jspeaen KOBOeBipaoBB beryllium 0.3% is due to the fact that, with its lower footpath, the resistance of land to land C1 will change. Upper margin is O, S% is limited by the fact that when it is done, Chien increases the temperiness of Pavi Chu “(Guna to transcrystallization, decrease oropnosti and reduce ductility.

The thorium carbide is introduced into the grinding process, uniform distribution of the Tver Kios phases into a viscous austevite martenritic base, ensuring the tropic structure and increasing the strength of cast iron. Introduces 1.1% thorium carbide in the alloy.

sharply crushes the structural components of cast iron. With an increase in its ends of a 1% walkie-talkie above 1.5%, there is a micronogue distribution of these inclusions and a decrease in the resistance to aerosol resistance of the material.

Cast iron is produced in the induction meKiponetH.

For more affective absorption, beryllium and carbide are introduced into the cast iron before pouring into the ladle. In order to protect people from cpetaa from ZM zvnn b illn. is introduced in high ampoules.

The chemical composition, mechanical properties and abrasive resistance of the proposed and lime iron are given in the table.

Abrasive resistance was assessed by the test rovlagates of 20Xx 100x150 samples in medium a (Centralized emulsion (80% abrasive)), which are tabulated.

Invention Formula

Cast iron containing carbon, silicon, manganese, nickel chromium, vanadium, titanium, boron and iron, which was designed so that, in order to evaluate the wear resistance under abrasive wear and toughness conditions, it additionally contains beryl / 1Iy and tsfi carbide at the following cooTHOuieBHH components, wt. %

Carbon2.5-3.0

Silicon, 5-O, in

Manganese 1,2-2, O

1.5-2.5

Nickel 5.0-7.0

Chrome 0.1-O, 3

Vanadium 0,1,2

Titanium

0,005-0,01 is

Bor 0.3-0.5

Beryllium 1.1-1.5

Carbide torn Else

Iron Sources of information taken during the examination:

1, USSR Author's Certificate 484264, M. class. C 22 C 37/08, 76.