SU1712338A1 - Stone castings - Google Patents

Abstract

The invention relates to the manufacture of stone cast products. In order to increase the fluidity of the melt, as well as wear resistance and the temperature of the onset of deformation of products, stone casting contains. wt.%: 40.0-46.0 SiOa: 3.0-7.0 AhOa; 0.5-5.0 Re20; 20.0-25.0 FeO; 15.0-20.0 MgO; 0.5-2.5 CaO: 0.5-1.5 Na20: 0.2-1.5 kgO; 1.0 - 2.0 CrOoZ; 0.08-1.00 AsaOa and 0.05-0.60 F3. The melt viscosity at a generation temperature of 1150 ° C. 13-19 dPa s, liquidity with Herti viscometer is 45-48 mm, the temperature of the beginning of deformation of products 1105-1130 ° C. abrasion resistance is 0.06-0.08 kg / M ^, the compressive strength is 580-700 MPa. 2 tab.

Description

The invention relates to the production of stone products and can be used to make complex profile castings with a fine pattern, used to protect metal parts from abrasive wear.

Known stone casting, including, wt.% :;

510245.0-49.5:

A120Z10.0-14.0, ReaOz9 .0-11.7;

FeQ4.5-5.3;

MgO7.0-10.5; ;

CaO8.0-10.5:

Na20 + K202.1-3.1;

Сг20з 03-0,4.

The known composition has a lack of fluidity of the melt, low temperature deformation of products and low resistance to abrasive wear.

A closer technical solution to the claimed is stone casting, comprising, in wt.%:

Si0246.0-55.0; .

(L

0.3-3.0: 7.0-13.0:

with

7.0-24.0:

1.5-10.0: 0.1-0.5: 2.0-9.0: 5.0-12.0:

4.0-11.0:. 0.2-1.0: 0.5-3.0,

The known composition of stone casting is characterized by the production of a material, the main crystalline phase of which is a pyroxene-based solid solution (augite and akmit), which does not provide sufficient resistance to abrasive wear. In addition, the low liquidity of the melt at the temperature of generation does not allow for the production of complex-shaped castings due to the impossibility of filling such elements of the mold with such a melt.

The aim of the invention is to increase the fluidity of the melt, as well as the wear resistance and temperature of deformation of the products.

The invention is illustrated by the specific formulations given in tab. 1.

Properties of the described compositions are given in table 2

Making raw materials for obtaining data, stone casting uses production waste; slags of chloride electrofusion of gold-containing concentrates and the battle of chrome-magnesite brick,

The mixture is heated at 1300 ° C, the finished melt is produced in earth or metal forms in the usual way, adopted in the stone industry. Crystallization occurs during 15-60 minutes, depending on the thickness and configuration of the products.

The introduction of a complex additive AzaOz in the amount of 0.08-1.0 wt.% And ZOZ in the amount of 0.05-0.6 wt.% Together with Cg20z in the amount of 1.0-2.0 wt.% In petrurgical melts causes an increase catalytic effect and leads to a decrease (less than 10%) of the glass phase in the material.

The resulting composition in stone casting ensures the production of fine-grained olivine (crystal size 5-15 μm) dense uniformly crystallized material with a glass phase content of 58%. Chrome spinel and pyroxene are present in small quantities.

Increasing the fluidity of the melt suggests that the obtained stone casting is used for the manufacture of complex castings used to protect metal products operating at elevated temperatures from abrasive wear .;

Claims (1)

Claims of the invention: Stone / 1 casting including SI02, A120z, Re20z, FeO, MgO, CaO, Na20, K20 and Cr20z. characterized in that, in order to increase the fluidity of the melt, as well as the wear resistance and temperature of the onset of deformation of the products, it additionally contains AS203 and F3 with the following content of components, wt.%: SI0240.0-46.0 A120z3.0-7.0. ReaOz0, 5-5.0 FeO20.0-25.0 MgO15.0-20.0 CaO0,5-2,5 Na200,5-1,5 K200.2-1.5 Сг20з1.0-2,0 AS2030.08-1.00 ZOZ0,05-0.60 Table 1 Table 2 Water temperature : laziness charge, С1300 1300 1300 Crystallization temperature molded-v „13001200