SU939581A1 - Modifying agent - Google Patents

Description

(54) MODIFIER

one

The invention relates to ferrous metallurgy, in particular to complex modifiers used to produce pig iron in continuous, chill and centrifugal casting. Known modifier 1 for sensitive a, composition, wt.%

Rare earth metals 0.5-6.0

Barium 0.1-3.0

Aluminum0,1-5,0

Calcium .0.4-0.7

Strontium1-3

Zirconium1-5

Silicon45-55

Iron Else.

A disadvantage of the known modifier is low modifying ability.

The modifier contributes to the crystallization of cast iron in a metastable system and the production of casting with a low impact-cyclic strength.

The closest in technical essence and the achieved result to the proposed is a modifier for cast iron {2 following composition, RCC.%:

Cerium2-5

Aluminum20-30

Silicon30-35

Antimony6 -10

Barium5 -10

IronErest

A disadvantage of the known modifier is that it does not provide an increase in the dispersion of the structure and mechanical properties of cast iron.

ten

The purpose of the invention is to improve the mechanical properties of cast iron.

To achieve this goal, a modifier containing cerium, aluminum,

15 silicon, antimony, barium, iron, additionally contains lithium and calcium at the following ratio of compounds, wt.%:

Cerium2-17

AluminumP-25

20

Silicon17-33

Antimony6-12

Barium4-18

Lithium2 1 (S Calcium1-6 Iron3-27 Lithium and calcium are introduced into the modifier as effective deoxidizing agents and metal desulfuriators, contributing to the grinding of the dispersity of perlite and graphite in cast iron. Lithium together with calcium and cerium cnocoecfByeT form spheroidal graphite in cast iron in black iron in cast iron in black iron. The modifiers of the proposed (l-3) and known compositions (4), shown in Table 1, are used to modify the gray of increased strength at 93 4 for the manufacture of thin-walled casting in the chill mold. The modifiers are produced by a metal-thermal method. Modifiers are introduced into casting buckets with a capacity of 200 kg with cast iron, containing, wt.%: Carbon 3.2-3, silicon 2.1-2.5, manganese 0.4-0.6, phosphorus 0.05-0. 1, sulfur 0.030, 07, and iron else. Table 2 shows the results of testing and studying the structure of modified cast iron in a molten state.

. The proposed Prev.ge in table. 2 dannyh bye. that the proposed modifier makes it possible to increase the strength of cast iron by 4–20 kgf / mm and the impact strength by 0.4–2 kgf / cm

Claims (1)

Table 2 Claims of the invention A modifier containing cerium, aluminum, silicon, antimony, barium, iron, about tl and t. what. with the aim of pbvippp5939581 6 nor the mechanical properties of cast iron, it supplements Calcium 1 - 6 Telio contains lithium and calpne when trace-iron 3-27 th, ratio of components, wt.%: Cerium 2-17 Sources of Information Aluminum 11-25J taken into account in the examination Silicon 17-331. USSR Copyright Certificate №544706, Antimony 6-12kl. C 22 C 35/00, 1977. Barium 4-182. USSR author's certificate N 739125, Lithium 2-16kl. C 22 C 35/00, 1980.