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Product Details

High chromium balls are widely used steel balls, mainly used in metallurgical mines, cement plants, thermal power generation and other industries. High chromium balls have the characteristics of high hardness, low wear and less breakage, and are favored by customers.

Product specifications

Φ10-150mm

Application fields

various metal mines (gold mine, copper mine, iron mine, molybdenum mine, alumina mine, lead-zinc mine), cement plant, power plant and other grinding industries.

Chemical composition

Name	Type	Chemical composition
Name	Type	C	Si	Mn	Cr	P	S	Mo	Ni	Cu
High chromium balls	ZQCr10	2.0~3.3	0.3~1.20	0.3~1.5	10~11	≤0.10	≤0.06	Trace	Trace	Trace
	ZQCr15	2.0~3.3	0.3~1.20	0.3~1.5	15~16	≤0.10	≤0.06	Trace	Trace	Trace
	ZQCr20	2.0~3.3	0.3~1.20	0.3~1.5	20~21	≤0.10	≤0.06	Trace	Trace	Trace
	ZQCr25	2.0~3.3	0.3~1.20	0.3~1.5	25~26	≤0.10	≤0.06	Trace	Trace	Trace
	Other grades are temporarily omitted, please contact the staff for details.

Analysis of mechanical properties and metallographic structure:

Name	Type	Surface hardness（HRC）	Impact value（AK J/c㎡）	Metallographic structure	Falling ball impact fatigue life（3.5M）
High chromium balls	ZQCr10-ZQCr28	58~66	≥4	M+C	≤80	15000
					≥80	10000
M-Martensite,C-Carbide

process characteristics

1. The raw materials are all bearing steel scraps, which contain copper, molybdenum, nickel and other precious metal elements, which can effectively improve the basic structure of the product, make the grain more refined and the structure more compact. The sulfur and phosphorus content of the product is extremely low, and the product is not easy to peel off and deform during use; the surface is smooth and round.

2. Adopt single refining process. All products are processed and produced by intermediate frequency electric furnace, which effectively guarantees the stability of melting temperature.

3. The fully automatic pusher type heat treatment oil quenching production line is adopted, with advanced technology and good hardenability. The uniformity of hardness of the product is greatly improved, and the relationship between hardness and toughness is improved, thereby improving the wear resistance of the product.