SU926054A1 - Master alloy - Google Patents

Description

I

The invention relates to ferrous metallurgy, in particular to ligatures used for alloying gray iron, used for the manufacture of parts and tools, for example, hobbing and finishing disks.

Known ligature JV of the following composition, weight:

Nickel2-20

Molybdenum10-50

Silicon5 20

Manganese1- 0

Chrome10-50

A disadvantage of the known ligature is poor digestibility due to the high melting point.

Closest to the proposed technical essence and the achieved effect is a master cast iron, containing, wt.%:

Molybdenum 5-60

Silicon1-15

Bszr -25 ..

Aluminum1-15

2

Carbon to 0, 15 Nickel Else The disadvantages of the famous ligature. poor absorption of alloying elements by cast iron and low furs. nical properties.

When doping gray cast iron of the basic chemical composition, weight,%: carbon 3 ,; silicon 2; manganese 0.6; the rest of the iron, the known alloying of the alloying elements was,%: molybdenum 82, boron 62, nickel 91. The alloyed cast iron has the following mechanical properties: flexural strength of 8 kg / mm; ultimate tensile strength of 23.5 kg / mmt relative elongation s, oT ..

The purpose of the invention is to improve the assimilation of alloying elements by cast iron and increase its mechanical properties.

The goal is achieved by the fact that a master alloy containing molybdenum, copper, aluminum, boron, carbon and

nickel, additionally contains honey and iron in the following ratio of components, weight; ..:,

Noli (5den)

60

30 1

Silicon

15

Aluminum

0.5 3

3.0

Copper

thirty

8.0

Iron

0.5

Bor 0.1

2.5

Carbon

0.05-0.3

Nickel

The introduction of copper into the composition of the ligature reduces the temperature of its melting to, which approximates the temperature of its melting to the temperature of the pig iron at the release

260544

iZ a furnace or cupola. This contributes to the rapid dissolution of the ligature in the molten iron and increase the absorption of alloying elements. The introduction of iron into the composition of the ligature also improves the absorption of alloying elements and improves the mechanical properties of cast iron.

Example. The ligature is used to to alloy gray iron with the following basic chemical composition, weight D: carbon G, silicon 2.0; manganese 0.6, iron the rest.

The compositions of ligatures used 15 for alloying gray iron are presented in the table.

Claims (1)

Claim A master alloy containing molybdenum, 50 silicon, aluminum, boron, carbon and nickel, characterized in that, in order to improve the assimilation of