SU834203A1 - High-strength cast-iron - Google Patents

Description

(54) HIGH-STRENGTH CAST IRON

Shock viscosity

kgSM / cm 3,6- 9,7

Hardness, HB, kgf / mm 197 -217

The disadvantages of conventional iron are low wear resistance, corrosion resistance and strength.

The purpose of the invention is to increase the wear resistance, durability and corrosion of cast iron in castings.

This goal is achieved by the fact that high-strength cast iron containing carbon, silicon, manganese, copper, an element selected from the group containing chromium, nickel, calcium, rare earth metals, magnesium and iron, additionally contains antimony, nitrogen and yttrium, and the group additionally contains titaa, zirconium, vanadium, niobium and boron, with the following ratio of components, weight,%:

Carbon 2.9 -4.1

Silicon1,2 -3,2

Manganese 0.3 -1.5

Copper0.05-0.5

Element selected

from the group containing chromium, titanium,

zirconium, vanadium,

niobium and boron 0.03-0.5

Nickel

0.01 -0.35 Calcium 0.03. -0.35

Rare earth

0.002-0.03 metals Magnesium 0.02 -0.04 0.01 -0.35 5 Antimony

Nitrogen0,002-0,04

Yttrium0,001-0,02

IronErest

Instead of chromium, high-strength cast iron may contain at least one element from the group consisting of titanium, zirconium, vanadium, niobium and boron in an amount of 0.03-0.5 wt.%.

An example). The proposed and: known cast irons are melted in electric arc furnaces, specimens are made for mechanical testing and molded hemming, obtained by pouring metal into cyxge liquid glass forms at 1380-1450 ° C. As a flux, during melting, a technical one is used. cryolite, and for desulfurization, calcined soda, i. I

In tavl 1 shows the chemical colc5 tav alloys in castings, and table. 2 mechanical and corrosion-erosion; properties.

table 2

It can be seen from the above data that the corrosion resistance and relative wear resistance of pre-alloyed cast iron exceeds the same indicators of the known alloy.

invention formula

High-strength cast iron containing carbon, silicon, manganese, copper,

an element selected from the group comprising chromium, nickel, calcium, rare earth metals, magnesium and iron, characterized in that, in order to increase wear resistance, strength and corrosion resistance, it additionally contains antimony, nitrogen and yttrium, and the group titanium and zirconium , vanadium, niobium and boron

The following ratio of components: s, wt.%:

2.9 -4.1

Carbon 1.2 -3.2

Silicon Qi3 -1.5

Manganese 0.05 -O, 5

Copper

Element selected

from the group containing chromium, titanium,

zirconium, vanadium,

0.03 -0.5

niobium and boron 0.01 -0.35

nickel 0.01 -0.35

Calcium

Rare earth

0.02 -0.03

metals

0.002-0.04 0.01 -0.35 0.002-0.04 0.001-0.02 Else

Sources of information taken into account during the examination

1. US patent 3981432, cl. 75-130, 1975.

2. Japanese Patent No. 51-6607, cl. 107-173, 1976.

3. 3. Copyright certificate CQCP 550458, cl. C 22 C 37/10, 1977.

Claims (1)

Claim Ductile iron containing carbon, silicon, manganese, copper. an element selected from the group consisting of chromium, nickel, calcium, rare-earth metals, magnesium and iron, 60 volts, in that, in order to increase wear resistance, strength and corrosion resistance, it additionally contains antimony , nitrogen and yttrium, and the group is titanium, 65 zirconium, vanadium, niobium and boron 0.002-0.04 0.01-0.35. 0.002-0.04 0.001-0.02 in the following ratio of components, wt.%: Carbon 2.9 -4.1 Silicon 1.2 -3.2 Manganese 0) 3 -1.5 Copper Item selected 0.05 -O ’, 5 from the group containing burning chrome, titanium, zirconium, vanadium, niobium and boron 0.03-0.5 Nickel 0.01-0.35 Calcium 0.01-0.35 Rare earth metals 0.02-0.03 Magnesium Antimony Nitrogen Yttrium <Iron