Wear-resistant ceramic material for the production of studs


(57) Abstract:

Usage: the invention relates to the production of cultural goods, household products, in particular, to the manufacture of studs for cars and trucks. The inventive anti-skid spikes are made of wear-resistant ceramic material containing oxides of aluminum, silicon, chromium and manganese, in the following ratio, wt. %: Al2O390,0 - 98,5; SiO20,8 - 4,0; Cr2O30,2 - 2,0; MnO 0.5 to about 4.0. table 1.

The invention relates to the production of cultural goods, household products, in particular the production of studs for cars and trucks.

Known anti-skid spike containing steel washer head and the insert of cemented carbide material [1]

To the disadvantage of a thorn include the high cost, the use of hydrocarbon compounds based on tungsten, sophisticated manufacturing technology thorn, including turning head flange and the subsequent brazing head with insert.

Known wear-resistant ceramics based on aluminum oxide [2]

However, the high sintering temperature (more than the pure aluminum oxide.

Also known wear-resistant ceramic material on the basis of the oxides of aluminum, silicon, chromium and manganese in the following ratio, wt. Al2O393,6 of 96.2 SiO22,0-3,2 Cr2O30,3-0,7 MnO 1.5 to 2.5 [3]

The disadvantage of this material is not sufficiently high wear resistance due to high content of stekloobrazuyuschego additives (SiO2, Cr2O3, MnO).

The purpose of the invention to simplify the manufacturing technology of thorns and reducing their cost.

This objective is achieved in that the anti-skid spikes are made of wear-resistant ceramic material on the basis of oxides of aluminum, silicon, chromium and manganese in the following ratio, wt. Al2O396,3-98,5 SiO20,8-1,90 Cr2O3of 0.2-0.3 MnO 0.5 to 1.5

The introduction of the pottery small quantities stekloobrazuyuschego additives allows to obtain high-density material at sintering temperature 1540-1560aboutWith no significant reduction in wear resistance compared to pure aluminum oxide.

P R I m m e R. Produced studded from the ceramic compositions according to the invention and outside the formula. As ishodnikami technical GOST 2912-79 and manganese carbonate GOST 7205-77. The components were weighed with regard to the content of the basic substance. After a joint grinding components with subsequent calcination at 1400aboutWith carried out secondary grinding. From the resulting powder by the method of slip casting followed by firing in a furnace at 1550aboutWith produced spikes. The wear resistance of thorns was assessed by the reduction of their mass after test in vivo on the truck KAMAZ-5320". The data given in the table.

As can be seen from the table, the reduction in the content of Al2O3below the 96.3 wt. causes a noticeable increase in wear of a thorn that, apparently, is connected with the decrease in the hardness of the ceramic material.

With increase in the content of Al2O3over to 98.5 wt. it is impossible to obtain a dense material by sintering at 1550aboutWith that also causes increased wear. The use of the composition of the ceramic material according to the invention allows to obtain a wear-resistant spikes by sintering at 1550aboutC. This greatly simplifies the technology of their production and thereby reduces the cost.

WEAR-resistant CERAMIC material FOR the PRODUCTION of STUDS containing Al2O3, SiO2, Cr2O/SUB>O3- 96,3 - 98,5

SiO2- 0,8 - 1,9

Cr2O3- 0,2 - 0,3

MnO - 0,5 - 1,5


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EFFECT: corundum-based articles with improved strength and heat resistance.

7 cl, 2 tbl

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EFFECT: refractory material sintered at 16000C with decreased opened porosity and increased mechanical strength.

2 tbl

FIELD: non-iron metallurgy, in particular cladding of metal plunge.

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EFFECT: cladding of improved strength.

2 cl, 4 tbl, 1 ex

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EFFECT: enhanced efficiency.

1 tbl, 4 ex

FIELD: metallurgy.

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14 cl, 7 dwg

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3 cl, 1 tbl

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2 tbl

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EFFECT: refractory material with bulk stability, high mechanical strength and low oxidation susceptibility.

2 tbl

FIELD: abrasive materials.

SUBSTANCE: invention is destined to provide high-strength corundum materials suited to manufacture of abrasive disks. Method of invention comprises preparing alumina-zirconium blend, fusing it from below and introducing reducer under surface of melt through the bed of blend in the second half-melting, tapping melt, and crystallization and cooling thereof. When being tapped and crystallized melt is protected against contact with air oxygen. Crystallizer contains metal vessel with upright metallic plates mounted inside the vessel with gaps between them. Crystallizer further has a holder to mount plate set. Outline of the lower part of plates follows outline of the vessel bottom. In the top part of each plate, V-shaped cut is made so that all cuts form together longitudinal groove to pour melt.

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3 cl, 1 dwg, 1 tbl

FIELD: refractory materials.

SUBSTANCE: invention relates to manufacture of corundum refractory articles based on mullite-corundum binder and used in linings of heat assemblies employed in variant industry fields. Method of invention comprises preparation of blend by way of moistening grainy corundum constituent with suspension of activating mullite-forming additive in industrial-grade lignosulfonate aqueous solution followed by mixing with finely ground corundum constituent, formation of articles from thus prepared blend, drying thereof, and firing at 1200-1500°C. Activating mullite-forming additive is finely ground silica/alumina mixture in eutectic weight ratio 94.5/5.5, respectively, used in amount 2-4% of the weight of total content of corundum constituents.

EFFECT: reduced power consumption on production of corundum refractory products due to lowered (by 200-500°C) firing temperature and reduced refuse.

1 tbl