SU834189A1 - Alloying composition - Google Patents

Description

one

The invention relates to the field of finding new ligatures for the treatment of cast irons, in particular, to obtain iron casting with high physicomechanical properties. Most closely to the proposed technical essence "the achieved result is the flj ligature of the following composition, wt.%: Niobium 0.15 - 0.3

Zirconium 0.75-0.85

Carbon 0.06-0.085

MolybdenumOther

The disadvantages of this ligature are the high cost due to the significant amount of molybdenum, as well as the fact that it has a high melting point, which is a consequence of the low absorption of its liquid iron. In addition, the content of a dan | NOM alloy of a small number of modifying elements-graftizers does not allow it to be used for the processing of cast irons in order to increase

their physico-mechanical properties and radiation-thin-walled castings without chilled.

The purpose of the invention is to increase the mastering of the master alloy during smelting, the mechanical properties of castings and the elimination of chill.

The goal is achieved by

Q that a ligature containing niobium, zirconium, carbon and mossbden additionally contains nickel, rare earth metals, tin and iron in the following coefficients, aec.t:

0.3-5.0

Niobium

S 0.1-2.6

Zirconium 0.3-0.9

Uglersd 3,0-28,5

Iikel

Rarely

0.5-3.5

metal1Sh

0 0.5-4.0

Tin 33.5-89.3

Iron

 Rest

Molybdenum

The conditions and experimental conditions are melted and tested ;;.

5 compositions of ligatures are given in table.1.

Table 1

The composition of the alloy corresponds to ed. with . The performance test of ligatures is carried out on the next cast iron, weight %: carbon 3.32 silicon l.f22} manganese 0.65} phosphorus 6.08 And jpefia 0.04. The cast iron is melted in an induction furnace with a capacity of 30 kg. The temperature of nugune during doping is within the limits of 1380-1400 C. The doping is carried out by immersing it

The degree of assimilation. Ligatures 85

29.5

30.0 25 1-30

46

30.2

24.9

29.8. No. 495381 ligatures before the release of iron on the bottom. The amount of ligature introduced is 1.0% by weight of the molten iron. For testing mechanical properties, cylindrical samples of diameter 10, 0, and 20 mm are poured. The chemical composition and properties of cast irons treated with known and proposed ligatures with a boundary content of the components are given in Table 2. Table 2

The composition and its cost of 1% of the proposed alloy of pig iron

0.5

0.6

235

Claims (1)

240 Claims of the invention Ligature, Sss; Nerbium niobium, zirconium, carbon and molybdenum, about tl of chanza, so that, in order to increase the mastering of the ligature during firing, to increase the mechanical properties of the ULIV CC and eliminate chill, it additionally contains nickel, rare earth metals, tin and iron in the following ratio of component weight,%: Niobium, 0.3-5.0 Zirconium, 0.1-2.6 Continued table. 2 Consumption 0.5% famous ligatures 5.0 0.5 230 242 0.3-0.9 Carbon 3.0-28.5 Nickel Rare-earth 0.5-3.5 Metals 0.5-4.0 Olozo 33.5-89.3 Iron Rest Molybdenum Information sources , which are taken into account under exgerty 1. USSR inventor's certificate 95381, cl. C 22 C 27/00, 1977.