Carborundum grains is a compound with the chemical formula SiC, and its crystal structure is a hexahedral lattice structure similar to diamond. It is an important advanced ceramic material with high hardness, thermal conductivity, chemical stability and wear resistance. Due to its excellent performance, it has been widely used in special fields, such as reactors and catalysts under high temperature and high pressure.

carborundum grains

chemical composition

Grade	Sic%	FreeC%	Si+SiO2%	Fe2O3	MgO%	H2O%
Sic75	75±4	2.5±1	17±2	3	0.16	<5
Sic65	65±4	4.5±1	23±2	4	0.12	<5
Sic55	55±4	4.8±1.5	28±3	5±2	0.1	<5
Sic45	45±4	5±2	31±3	7±2	0.1	<5

Size Range	Chemical Composition %
Size Range	SIC	F.C	Fe2O3
16#-90#	>98.50	<0.02	<0.60
100#-180#	>98.50	<0.30	<0.80
220#-240#	>98.50	<0.30	<1.20

Size Range	Chemical Composition %
Size Range	SIC	F.C	Fe2O3
20#-90#	>99.00	<0.20	<0.20
100#-180#	>98.50	<0.25	<0.50
220#-240#	>98.00	<0.25	<0.70

Model	Chemical Composition %
Model	SiC	Free Carbon	Fe2O3
SiC 98	98 min	0.2 max	0.60 max
SiC 97	97.0 min	0.3 max	1.20 max
SiC 90	90.0 min	1.0 max	1.20 max
SiC 88	88.0 min	4.0 max	1.5 max
Model-SiC Briquette	SiC	Al2O3	Fe2O3
SiC Briquette 70	70.0 min	5.0 max	3.0 max
SiC Briquette 65	65.0 min	5.0 max	3.0 max

The role of carborundum grains in steelmaking

1. Improve the hardness and wear resistance of steel

The hardness of carborundum grains is very high, about 3 times the hardness of steel. It can be used as the second phase in the steel compound to increase the carbide in the steel, thereby improving the hardness and wear resistance of the steel. In addition, carborundum grains can prevent oxidation, silicide and sulfidation reactions on the surface of the steel, thereby improving the corrosion resistance of the steel.

2. Reduce the brittleness of steel

As the carbon content in the steel increases, the hardness and brittleness of the steel will also increase. However, when carborundum grains is added to the steel, the brittleness of the steel will be reduced due to the optimization of the balance between hardness and toughness, thereby achieving the purpose of improving the toughness of the steel.

3. Improve the high temperature resistance of steel

Carborundum grains itself has good high temperature resistance, can maintain good stability and mechanical properties under high temperature conditions, and is not easy to rust. Therefore, during the high temperature treatment of steel, the addition of carborundum grains can maintain the stability of the steel and improve its wear resistance.

carborundum grains

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Carborundum Grains

chemical composition

The role of carborundum grains in steelmaking

1. Improve the hardness and wear resistance of steel

2. Reduce the brittleness of steel

3. Improve the high temperature resistance of steel