si3n4 or zro2 ceramic bearings

 

 

CS CERAMIC CO.,LTD High precision zirconia /ZrO2 ceramic ball

How a Ball is Made

 

Heading: In the first step, heading machines cut wire into short lengths and form it into spherical shapes between dies.

 

Deflashing: The flash line, a ridge left by the forming dies, is removed as balls roll between heavy, cast iron plates.

 

Soft Grinding: Similar to deflashing, except that a grinding stone is used to improve precision.

 

Heat-treating: Carbon steel balls are next carburized and hardened. Heat treatment imparts the desired hardness and case depth.

 

Descaling: This step removes the residues and by-products from the heat-treating process.

 

Hard Grinding: Slow, meticulous grinding assures proper sizing and sphericity, with tolerances as close as ¡À.0001".

 

Lapping: Several proprietary lapping processes can bring balls to the requirements of ISO 3290 Grade 10 - 48.

 

Finishing: Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, for increased wear resistance and product longevity.

 

Inspection: All products pass through at least two 100% inspection stages, using proprietary, automated inspection processes

 

We are the professional manufacturer of steel grinding ball. Our products have been exported to more than 40

countries in the world and all have enjoyed a great reputation.  The specification of our products as following:

1.Chemical composition:

Item	C	Cr	Si	Mn	S	P	Cu	Mo	Ni	Hardness
Element	0.6-1.2%	¡Ü 1.0	0.15-0.6	0.6-1.5	¡Ü 0.04	¡Ü0.04	¡Ü0.1	¡Ü0.25	¡Ü0.1	55-65

 

Item	Material: ZrO2	Bearing Steel
Density (g/cm3)	6.05	7.85
ThermalExpan (10­-6/k)	10.5	12.5
Max Use Temperature ¡ãC	750	300
Water Absorption (%)	0	0
Corrosion Resistance	Excellent	Poor

Chemical Analysis

Element	Compositions				Crucible Backup
	3001	1651	2004	2290	1859	3001
SiO2	1.5	0.4	27.0	0.3	0.6	1.2
CaO	0.2	3.1	0.3	0.3	4.5	0.2
MgO	2.7	0.4	0.2	0.1	4.5	2.2
Fe2O3	0.1	0.1	0.2	0.1	0.2	0.2
Al2O3	0.8	0.4	0.5	0.3	0.25	0.7
TiO2	0.1	0.1	0.2	0.1	0.2	0.2
Y2O3	- - -	- - -	- - -	5.2	- - -	- - -
ZrO2	94.6	95.5	71.6	93.6	89.75	95.3

Physical Properties

	Compositions				Backup Sizing
	3001	1651	2004	2290	1859	3001
Density	4.6g/cc	4.2g/cc	3.6g/cc	4.5g/cc	-8+100 Tyler mesh Size	-8+28 Tyler mesh Size
Porosity	18%	25%	16%	23%
MOR @R.T.	3500psi	2400psi	4300psi	2400psi

CS CERAMIC High precision zirconia /ZrO2 ceramic ball

How a Ball is Made

 

Heading: In the first step, heading machines cut wire into short lengths and form it into spherical shapes between dies.

 

Deflashing: The flash line, a ridge left by the forming dies, is removed as balls roll between heavy, cast iron plates.

 

Soft Grinding: Similar to deflashing, except that a grinding stone is used to improve precision.

 

Heat-treating: Carbon steel balls are next carburized and hardened. Heat treatment imparts the desired hardness and case depth.

 

Descaling: This step removes the residues and by-products from the heat-treating process.

 

Hard Grinding: Slow, meticulous grinding assures proper sizing and sphericity, with tolerances as close as ¡À.0001".

 

Lapping: Several proprietary lapping processes can bring balls to the requirements of ISO 3290 Grade 10 - 48.

 

Finishing: Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, for increased wear resistance and product longevity.

 

Inspection: All products pass through at least two 100% inspection stages, using proprietary, automated inspection processes

 

We are the professional manufacturer of steel grinding ball. Our products have been exported to more than 40

countries in the world and all have enjoyed a great reputation.  The specification of our products as following:

1.Chemical composition:

Item	C	Cr	Si	Mn	S	P	Cu	Mo	Ni	Hardness
Element	0.6-1.2%	¡Ü 1.0	0.15-0.6	0.6-1.5	¡Ü 0.04	¡Ü0.04	¡Ü0.1	¡Ü0.25	¡Ü0.1	55-65

Shipping:               We do international shipping for clients