SU740855A1 - Master alloy - Google Patents

Description

one

The invention relates to metallurgy and foundry industry, in particular to master alloys for the processing of cast iron,

Known ligature of the following composition, wt.%:

Hrom34-36

Manganese 29-31

Silicon10-12

Carbon 0.8-1.2

IronOther p ... Q

The disadvantages of the known ligature are high melting point and low degree of assimilation.

Closest to the described image-jij, the lining of the technical essence and the achieved effect is a ligature for cast iron of the following composition, weight,%

Chrome 10-40

Silicon 0.5-2.0 JQ

Carbon, O1-0, O8

Manganese41-75

Phosphorus 0,01- 0,5

IronEs rest 23.

The disadvantages of this ligature are a high pressing temperature, a low degree of assimilation and low fluidity, strength and antifriction properties of the pig iron treated with a ligature.

Known ligature has a temperature of p, chuleni 132O-1380 ° C, The mastery of ligatures of pig iron composition, wt.%: Carbon 3,38-3,47; silicon 1.64-1.73; manganese O, 6 1-0,66; sulfur O, 05; phosphorus 0.12; the remaining iron is 67-74%. After a ligature treatment, the cast iron has the following cBoifcTBa:

Strength at stretching, kg / mm 19.2-21.3 Flexural strength, kgf / mm 52.8-54.2 Strength, mm2.8-2.9 Elastic modulus, kgf / mm 1185О-1215О Coefficient Tldani without grease0,3-0,41

Relative value of enoskhuykotskoi1, 0-1,09

The relative value of fluidity at 1350 S1.0-1,17

Cast iron has a pearlitic microstructure with cement inclusions.

The aim of the invention is to reduce

melting point, an increase in absorption assimilation and an increase in liquid flow

strength and antifriction properties

cast iron.

To achieve the goal, the ligature for Chun Gong, containing chrome, silicon, manganese, carbon, phosphorus and iron, additionally contains copper and IWHK in the following ratio of components, wt.%: Chromium 2.5-32.0

Silicon8-38

Manganese 0.15-8.5

Carbon 0.2 -4.5

phosphorus 0.05-8.5

Copper6.0-30.0

Zinc 0.1 to 6.5

IronErest

Example. The ligature is used to treat cast iron of the following composition, E.%: carbon 3.38-3.47; silicon 1,641, 73; manganese 0.61-0.66; sulfur 0.05; phosphorus 0.12; iron else. The ligature is introduced in the amount of 1,, 15 wt.%.

In tab. 1 shows the compositions of the proposed ligatures

In tab. 2 shows the properties of the ligature and the properties of the treated ligature of iron.

From the data in the table it follows that the proposed ligature, compared with the known ligature, has a lower melting point, a higher degree of assimilation by the cast iron and ensures an increase in the fluidity, strength and antifriction properties of the cast iron.

Table 1 of the form of the invention Ligature, containing chromium, silicon, manganese, carbon, phosphorus and iron, is characterized in that, with a chain of lower melting temperature, an increase in the degree of absorption and an increase in fluidity, strength and antifriction properties of the iron, it additionally contains copper and zinc in the following ratio, wt.%: Chromium 2.5-32.0 Silicon 8.0-38.0 0.15 -8.5 M Arganese 0.2-4.5 Carbon O, 05 -8.5 Phosphorus 6.0-ZO, 0 0.1 -6.5 Else Iron Sources of information that are taken into account during the examination 1. Author's certificate of the USSR 174649, cl. C 22 C 35 / OO, 1964. 2. USSR author's certificate 372286, cl. C 22 C 35 / OO, 1974.

Claims (1)

claims ligature containing chromium, silicon, manganese, carbon, phosphorus and iron, characterized in that, with a chain for lowering the melting point, increasing the degree of assimilation and increasing the fluidity, strength and antifriction properties of cast iron, it additionally contains copper and zinc in the following ratio components, wt.%: Chrome 2.5-32.0 Silicon 8.0-38.0 M arganese 0.15 -8.5 Carbon 0.2-4.5 Phosphorus 0.05 -8.5 Copper 6.0-30.0 5 Zinc 0.1 -6.5 Iron Rest