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Casting Balls

Product Name:Casting Balls

Product Details:

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Detail

Product Quality Standard

1.The chemical composition of the high chromium type product should conform to the below table. We can also manufacture the product with special chemical composition in accordance with the requirements of the customers.

Code

Chemical Composition (Mass Fraction)

Cr

C

Si

Mn

Mo

Cu

V

Ti

P

S

ZQCrG1

10-16

2.0-3.5

≤1.0

0.5-2.5

≤1.0

≤1.0

≤0.3

≤0.15

≤0.1

≤0.1

ZQCrG2

16-22

ZQCrG3

22-28

 

2.The nominal diameter, allowable deviation, maximum diameter, minimum diameter of the cast grinding steel ball should be in accordance with the following table.

Nominal  Diameter

20

25

30

40

50

60

70

80

90

100

Allowable Deviation of Diameter

+2.0-1.0

+2.0-1.0

+3.5-1.0

Difference between the Maximum Diameter and Minimum Diameter

≤1.8

≤2.4

≤3.0

≤3.6

≤4.2

≤4.6

 

3.The high chromium type of product can be manufactured with the mechanical properties following the requirements of customers.

Code

Surface Hardness(HRC)

Impact Test(Ak)

Impact Fatigue life(Times)

ZQCrG1

≥58

≥3

≥10000

ZQCrG2

ZQCrG3

 

Surface Quality

The surface of the cast iron grinding ball is not allowed to have the casting defects such as the crack, and the obvious gas porosity, inclusion, shrinking cavity, cold shut, elephant skin, etc.

Internal Quality

It is not allowed to have the shrinkage cavity, shrinking porosity, gas porosity, inclusion, and other cavity defects on the section including plane pasting through the pouring gate and the ball center.

 

Testing Method and Inspection Rules

1. Impact Test

2. Rockwell Hardness Test Specimen Preparation

3. Chemical Composition Inspection

4. Surface Hardness Inspection

5. Internal Quality Inspection

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