SU633660A1 - Paint for casting moulds - Google Patents

Description

(54) PAINT FOR CASTING FORMS

J633660

Zyg total .; 2.-4.2Si02; no more than 0.5 (rejOj -Pj no more than 0, ZDE20 and the rest.

The internal surface of the chill molds, heated to 250–350 ° C, is painted with a spray gun in order to obtain a layer of dried paint with a thickness of 0.4 mW1. Coating consumption for dyeing one COKILE is 90-110 cm,

Cleaned and fused surface of the rollers in the inductor NGW to 850-1150 O) The part is lifted into the inductor and its rotation in the heating process at the installation is carried out

The name of the material

21.07.0 8.0 10.0i2.0 12.5 10.5- 0.3 0.5 7, 10.5 3.20.01 0.05 2.03.5 4.0 -1, 4 1.5 3.06.0 6.5 0.2 - The Rest

automatically, jiiw dap / willows use cast iron of the following composition, Bec ..; 2.90-3.30 C; 1.1-1.35 5; 0.8-1.3ALp; 0.4-0.6 SG; 0.05-0.09 S and 0.08 R. The cast iron temperature during casting was in the range of 1330-1370 ° C. To obtain uniform surfacing conditions in the casting process, the part rotates together with the pinn and the metal is poured into the gap between the surface of the part and the mold .

Hgachichesky with "giving paints and iix properties are presented in tab. Table I 2 respectively

Table 1

Properties

11ГГ „ПЛ

table 2

4. Sedimentacisashiness (cm) after 7 h after 24 h 5. Skininess of the coating, 6. Uniformity of the coating layer when sprayed 7. Interaction with the flux is mutually effective

Coating compositions 3 and 5 have an optimal composition and provide a slight melting of the coating, little interaction with the coating with a flux, optimal conditions for the {{steel} deposition of the weld metal, obtaining the required microstructure and increasing fuchical mechanical properties.

. When the content of pyrophyllite is less than 0.5 wt.%, Its effect on the properties of the coating is insignificant, and when the content is more than 10.0 wt.% Ter, 0b-1.081, 09 1.10 is good and weak.

Increased binder consumption, which leads to the formation of gas holes in the weld metal.

Silvery graphite is used to reduce bonding between the coating particles and reduce the removal of castings from metal molds. When the content of graphite is less than 0.05 wt.%, Its action is insufficient, and if it is more than 3.5 weight,%, it worsens the bond of the coating with the surface of the mold and leads to its partial washing off with liquid metal.

Entering into the coating - sulfite-alcohol stillage (if 1.1-1-1.2 eliminates the clay component. Bard in an amount of 1.5 wt.% Is used when the content in the coating is expanded perlite at the lower limit. Containing less than 1, 5% by weight of bards covering capacity of the coating is insufficient. The content of bards at the upper limit is used when introducing into the coating composition 12.0% of pearlkg and 10.0% of perophyllite. When using bards in quantities greater than 6.0% by weight, there is an increased gas evolution and the appearance of gas pockets in the weld talle.

When the content of the coating is less than 8 wt.% Of the expanded perlite, its thermal insulation properties are low and do not provide for the study of the optimal microstructure and its hundred guided metal. When the content of perlite more than 12.0 weight.% Suspension pacTBqp

the coating is made thick and n.riox () is applied to the surface of the metal mold.

Implementation of the invention will allow for galvanization. to stabilize the processes of crystallization of the liquid metal and increase its resistance to the material by 2.5–3.5 times, as well as to obtain the economic effect of replacing the earth forms with a metal with a paint in the amount of 1.87–2.93 rubles. on one restored SYA1OGNYY skating rink.

Claims (1)

1. USSR author's certificate number 442002 class. B 22 C 3/00, 1972.