SU551100A1 - Paint for rods - Google Patents

Description

(54) PAINT FOR RODS

one

The invention relates to the field of foundry, namely to paints intended for mold cores.

Known paint for mold cores, containing boric acid, a filler, a stabilizer and a binder. However, such paints do not prevent the ingot from being welded to the surface of the mold.

Closest to the described image of the technical essence and the achieved result is a paint containing a refractory filler, a datolite concentrate, a binder, a stabilizer and water 2j.15

The aim of the invention is to increase the durability and uniformity of the coating.

The goal is achieved by the fact that the known coating contains, as: 20 refractory filler, electrocorundum, sulphite-yeast paste as a binder, and asbestos as a stabilizer at the following ratio of ingredients, wt.% :. 25

Electrocorundum 2O-27

Sulfite yeast brew 2-4 Datolite concentrate 27-40

Asbestos5-9

WaterEverything

Datolite concentrate has the following chemical composition, wt.%:

15-16

Coio

33-34

Mg-0,2-0,4

, 3-2,5

TeO0,8-1,2

Ae, 0,1,6-1,8

C-QZ3,2-3,4

Si Oj Else.

Datolite concentrate serves as a modifying component, saturating the working layer of cast iron of molds with boron.

Electrocorundum is a granular inert filler that forms the cermet layer on the working surface of the mold and contributes to the mass transfer of boron to the casting metal due to thermal filtration forces. Instead of electrocorundum, you can use staurolite.

Asbestos powder is a stabilizer that prevents sedimentation of the granular constituents of the paint and improves its covering ability when applied to the surface of the rod with a spray gun.

Sulfite-yeast brew (CJ) binder, providing the necessary strength of the paint layer. Water thinner paints to a specific weight of 1.5-1.8 g / cm.

The paint is sprayed on top of 10 nonstick paint onto a dried sulphite yeast mash

beats. weight 1.2 g / cm

Asbestos drip

Water

Technical alumina

Soda Ash

Graphite

Clay refractory

Liquid glass

The durability of the paint layer (the number of heats that it holds)

Uniformity

The thickness of the paint layer, mm

A hot rod with a temperature of 10 ° -90 ° C and after 30-50 minutes thereafter, the mold is poured with cast iron.

The optimality of paint formulations is determined by the microstructure of samples exposed to paint.

In tab. 1 shows the compositions of paints according to the invention, and in table. 2 - ikhfaiiko.4ekhanicheskie and technological properties.

Table 1

3

4 9 27

7

33

35-40

2-4

2.5-4

2-4

2-5

table 2

12-15

Uniformity is insufficient

Claims (2)

0.2-0.4 The study of the microstructure of the stained specimens, as well as the data presented in the tables, showed that the composition No. 2. The proposed paint will increase the resistance of ingot molds to burn ingots and the formation of surface defects. Invention paint for rods, including a refractory filler, a datolite concentrate, a stabilizer and water, characterized in that, in order to increase durability and uniformity, it contains corundum as a refractory filler, sulphite yeast powder as a binder, and stabilizer asbestos in the following ratio of ingredients, weight,%: Electrocorundum 2 O -27 Sulfite-yeast mash2-4 Datolite concentrate 27-4O Asbestos 5-9 E I Remaining Sources of information taken into account during the examinations 1. Coll. Metallurgists number 2, 1974, p. 116-120. 2, Copyright certificate № 2O12675 / 22-2, 1974 (prototype).