SU908899A1 - Deoxidizing and alloying alloy - Google Patents

Description

(S) ALLOY FOR DECOMPOSITION AND ALLOYING

I

The invention relates to ferrous metallurgy, more specifically to compositions for the alloying of steel and cast iron.

Known alloy IJ for deoxidation and alloying of iron-based alloys of the following composition, wt.%:

Carbon 0.2-3

Silicon 0.6-17

Manganese 0.5-8

Chromium

Nickel 0.1-7

Vanadium 3-10

Niobium 0.5-15

Iron Else

A disadvantage of the alloy is that it contains expensive and scarce components of nickel and niobium.

The closest to the proposed technical essence and the achieved effect is an alloy, 2 for deoxidation and alloying of iron-based alloys of the following composition, wt.%:

2

Silicon 8-36

Manganese 0.5-10

Chrome 6-35

Carbon 0.3-

0.3-3 aluminum

Copper 10-32.5

Titanium 0.5-2.8

Niobium 0.3-6

Tantalum

Iron Else

ten

The disadvantage of this alloy is that it contains scarce and expensive components: niobium and tantalum.

In addition, niobium and tantalum VLIs are strong carbide-forming components, which leads to the bleaching of iron castings.

The purpose of the invention is to reduce the cost of the alloy and increase the strength and impact resistance of cast iron.

The goal is achieved by the fact that the alloy for deoxidation and alloying containing silicon, manganese, chromium, carbon, aluminum, copper and titanium, iron, additionally contains vanadium in the following ratio, weight D:

Silicon 0.2-2

Manganese 0.2-2

Chrome 0.05-2

Vanadium 0, -2

Carbon 0.8-5

Aluminum 0.05

Copper 0.03-1.5

Titanium 0.05 Iron Rest

The use of this alloy allows deoxidation with aluminum and alloying with chromium, vanadium, titanium, copper, and thereby significantly improve the properties of castings.

The low content of sulfur and phosphorus in the alloy (,. Od.) And its use in the amount of 2Q-kQ% of the metal fill, improves the properties of the metal by reducing the effect of harmful impurities.

An example. The proposed alloy in the amount of 30 from metal offered 0.2 0.2 0.05 O, i 0.8 0.8 0.05 1 222251 1.2 1.0 1.2 0.6 0.6, O 0.8 0.8 Known 8.0 0 , 5 6 - 0,3 0,3 C 5 36 10 35 - 3

the fillings are introduced into

ne4bj known alloy is introduced into the ladle before pouring the metal, then a small amount of metal is poured (before the alloying alloy is coated); incubated for 30 seconds, then poured with the remaining metal.

The amount of alloy in the bucket machining is determined based on

obtaining chemical composition of cast iron of a similar composition obtained using the proposed alloy. The assimilation of chemical elements for the proposed alloy by 15-20%

higher than for the famous.

Table 1 shows the compositions of the proposed and known alloys / used for alloying pig iron. .

Table 2 shows the chemical composition and properties of alloyed iron.

The data given in Table 2 shows that the proposed alloy can significantly increase the strength and impact resistance of cast iron.

Table 1 Ostal0, 03 0.05 nue 1.5 + The same 1.0 0.7 100.5 0.3 0.05, 5 2.8 6 3

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Claims (1)

g J-in n Claim of the Invention An alloy for deoxidation and alloying containing silicon, manganese, chromium, carbon, aluminum, copper, titanium, iron, characterized in that, in order to reduce the cost and increase the strength of the iron, it further contains vanadium in Ratio of components, weight: Silicon 0.2-2 Manganese 0.2-2 908899 5 pr to № 8 Chrome 0.05-2 Vanadium Q, -2 Carbon 0.8-5 Aluminum 0, Copper 0.03-1 , 5 Titanium 0.05 Iron Else Sources of information cited in the examination 1. USSR author's certificate 997, cl. C 22 C 35/00,. USSR author's certificate 59509, cl. C 22 C 35/00, 1978.