Forging rolling steel ball

Forging rolling steel ball

Nominal diameter(mm):Φ20

Weight of single ball in average(g):32

Surface hardness(HRC):60-65

Features

  Product performance:

  Uniform hardness

  Unbreakable

  Grinding resistant

  High impact value

  High combined efficiency of grinding mill

Specification

  Chemical element of forged steel balls:

 

Materials

C

Mn

Si

Cr

S

P

50Mn

0.48-0.56

0.70-1.0

0.17-0.37

≤0.25

≤0.035

≤0.035

60Mn

0.57-0.65

0.70-1.0

0.17-0.37

≤0.25

≤0.035

≤0.035

65Mn

0.60-0.70

0.90-1.2

0.17-0.37

≤0.25

≤0.035

≤0.035

75MnCr

0.70-0.85

0.7-0.8

0.17-0.37

0.20-0.60

≤0.030

≤0.030

B2-1

0.55-0.70

0.65-0.85

0.15-0.30

0.7-1.10

≤0.020

≤0.020

B3

0.58-0.66

0.68-0.8

1.7-1.9

0.78-0.9

≤0.030

≤0.030

B6

0.75-0.9

0.8-1.02

0.17-0.37

0.88-0.98

≤0.035

≤0.035

 

Specification of forged steel Grinding balls

 

Nominal diameter

Diameteical
Tolerance

Weight of single ball in average

Surface hardness

Impact toughness

(mm)

(mm)

(g)

(HRC)

(j/cm2 )

Φ20

+2      -1

32

60-65

 

 

 

≥12

Φ25

64

Φ30

110

Φ40

263

Φ50

513

Φ60

+3    -2

888

57-62

Φ70

1410

Φ80

2104

Φ90

2996

Φ100

4110

Φ110

+4    -2

5457

55-60

Φ120

7102

Φ130

9030

Φ140

+4    -3

11278

Φ150

13871

 

  Package:

  Jumbo bag(1000KG) Iron drum(850-900KG)

Application
  •   Application fields:

      Industries of cement building material,metallurgical selection in mine,grinding coal in powder plant,chemical industry.

      Production process of steel ball:

      1.The stock the grinding steel balls is hot-rofled bars with various compositions.

      2.Bars are reheated to a proper temperature in a continuous reheat furnace before rolled.

      3.After a red hot bar is conveyed into the skew rolling mill,it rotates forward between two rolls with special spiral passed.As this process continues,it is gadually rolled into steel balls.A single skew rolling mill can produce 60-360 steel balls per minute.

      4.The hot steel balls are transported directly to the online heat treatment equipment,specially designed for steel balls quenching and tempering.Steel balls can obtain very high and uniform hardness.

      5.Finished steel balls characterized by the precise dimension and geometry,better anti-wear properties and mechanical properties.

      6.The products which passed inspection are transported the finished products storehouse and then delivered to customers after packed.

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