SU1011718A1 - Master alloy for steels and alloys - Google Patents

Abstract

LEGATURE FOR STEEL AND ALLOYS, containing lumpy, rare earth metals, aluminum, titanium, boron and nickel, characterized in that, in order to improve the mechanical properties of steel and wear-resistant w, and to exploit the durability of castings, it also contains vanadium at the following ratio and components , wt.%: 5-15 Rare earth 10–30 metals 5–25 Aluminum 5–10 Titanium 1–5 Bor 5–30 Vanadium Else Nickel §

Description

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This invention relates to metallurgy, in particular to silicon-free ligatures for steel and alloys.

Known ligature for steel and alloys 1 of the following composition, wt.%:

Calcium10-15

Rare earths10-30

Aluminum5-30

Vanadium5-30

Nickel15-50

The disadvantage of this ligature is the low wear resistance of the resulting castings.

Closest to the invention to the technical essence and the achieved result is the master alloy for steel and alloys 2 of the following composition, wt.%:

Calcium10-15

Rare earths20-30

Aluminum20-30

Titan5-15

Bor1-5

NickelEverything

The disadvantages of the known alloys are the low mechanical properties of the steel produced and the unsatisfactory wear resistance, and the effective resistance of the resulting castings from alloys.

The purpose of the invention is the improvement of the mechanical properties of steel and wear resistance, and the operational resistance of castings from alloys. This goal is achieved by the fact that a master alloy for steel and alloys containing calcium, rare earth metals, aluminum, the content of components, wt.%

 Composition No.

Ca T REM HA |, TiVB

offerable

25 18 30 22 10 14

5 1 2 3 4 5

7

eight

ten

15

11 Known

tan, boron and nickel, additionally contains vanadium in the following ratio of components, wt.%:

Calcium5-15

Rare earth

metals10-30

Aluminum. 5-25

Titan5-10

Bor1-5

Vanadium5-30

NickelEverything

Introduction to the composition of vanadium ligatures in the amount of 5-30 wt.% Increases the mechanical properties of steel and the wear resistance and operational durability of the obtained castings from alloys. The content of vanadium in the ligature less than 5 wt.% Does not provide the necessary concentration in the steel and does not improve its structure and properties. The content of vanadium 0 in the ligature of more than 30 wt.% Increases its concentration, which adversely affects the properties of steel and alloys due to the excessive formation of nitrides and oxides.

Example. The proposed ligature is introduced in the smelting of 45FL structural steel and chromium alloy for shot-cleaning castings. Steel is smelted in a 7-ton electric arc furnace, and 0 from pav - in a 900-kilogram furnace. In the casting process, the melt is treated with an additive of 0.3% of the proposed master alloy.

In tab. 1 shows the compositions of the proposed ligatures, and table. 2 and 3, respectively, the properties of the resulting steel and alloys.

Table 1

Ni

Rest

2 1

five

8 7 10 The same.

sixteen

3 5 3

21

25

5 6 7

thirty

2

table 2

Table 3

Claims (1)

LEGATURE FOR STEEL AND ALLOYS, containing calcium, rare earth metals, aluminum, titanium, boron and nickel, characterized in that, with a chain of increasing the mechanical properties of steel and wear resistance, and the service life of castings, it also contains vanadium in the following ratio of components, weight. %: Calcium 5-15 Rare earth - metals 10-30 Aluminum 5-25 Titanium 5-10 Boron 1-5 Vanadium 5-30 Nickel Rest § | with and * · one 1011718 2