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hi cr grinding media cast balls

hi cr grinding media cast balls

Dia.8mm-150mm Casting Iron Grinding Media Ball - Gaincin.com

Application: Mine,Ball Mill,Cement Plant,Power Station,Chemical Industry, Fertilizer, etc.
Material: Iron, Chrome Alloy, Iron Alloy
Dimensions: Dia.8mm-150mm(0.3”-6”)
Unbreakable: 0.5% MAX; Surface Hardness: 60-65HRC
Technology: Casting and Foundry

1.Features of Casting Grinding Ball

1) High Hardness: surface hardness of casting balls is to 60-68 HRC and volume hardness of foundry

steel balls is to 60-63 HRC;

2) High Impact Toughness: the impact toughness of high chrome grinding media is more than 12 J/cm2;

3) Low Broken Rate: the actual broken rate is not higher than 1%;

4) Wear-resistant: the grinding lost of chrome steel balls is 20-200g/ton.

2.Material and Chemical Composition of Casting Grinding Ball

Name

Model

Material

C

Si

Mn

Cr

S

P

GC-1

High Chrome

Cr-23-32%

2.0-2.8

≤1.0

0.5-2.0

23-32

≤0.01

≤0.01

GC-2

Cr-18-22%

2.0-2.8

≤1.0

0.5-2.0

18-22

≤0.01

≤0.01

GC-3

Cr-15-17%

2.2-3.0

≤1.0

0.5-2.0

15-17

≤0.01

≤0.01

GC-4

Cr-10-14%

2.2-3.2

≤1.0

0.5-2.5

10-14

≤0.01

≤0.01

GC-5

Medium Chrome

Cr-5-9%

2.1-3.2

≤1.2

0.5-1.5

5.0-9

≤0.01

≤0.01

GC-6

Low Chrome

Cr-1-4%

2.2-3.5

≤1.2

0.5-1.5

1.0-4

≤0.02

≤0.02

3.Physical Property of Casting Grinding Ball

Model

Hardness(HRC)

Impact Test

(Ak.J/cm2)

Endurance

Test Times(5m)

Microstructure

Quenching

Unquenching

High Chrome

≥60

≥58

≥17

≥15000

M+C

Medium Chrome

≥56

≥15

≥12000

P+C

Low Chrome

≥53

≥13

≥10000

P+C


4.Main Process of Casting Grinding Ball

(1)Raw material (2)Scientific Proportioning (3)Electric Furnace Smelting (4)Assay Before Furnace

(5)Mold Forming (6)Polishing (7)Heat Treatment (8)Qualified Products (9)Packing (drum/barrel or bag)

5.Applied Field

1)Cement Plant 2)Mine 3)Power station 4)Chemical Industries 5)Sag Mill, Ball mill

6.Specification of Casting Grinding Ball

1)High chrome cast balls Size:8mm-150mm

Hardness:HRC60-67; Chrome content:11-14%
2)Low chrome cast balls Size: 20mm-150mm
Hardness:HRC55-60; Chrome content:1-5%