Special Steel Grinding Ball I

Coal Powder Grinding Ball Mill Machine

Forged steel ball is divided into carbon grinding steel ball, manganese grinding steel ball and special grinding steel ball. Forged steel ball is one of our advantage products. Diameter 20-70mm and 80-150mm steel ball are produced respectively by advanced automatic hot rolling and hot forging steel ball production line.

Description

 

This grinding ball is widely used all over the world. High volume hardness and less wearing. Quality is well accepted by the customers. Please kindly check the following detailed performance.

Chemical Composition C(%) Si(%) Mn(%) Cr(%) Cu(%) Mo(%) P(%) S(%)
0.72-0.80 0.17-0.37 0.8-0.9 0.5-0.6 ≤0.25 ≤0.3 ≤0.035 ≤0.035
Size 20-150mm(0.8inch-6inch)
Hardness Serious  Hardness
Standard Hardness 58-63HRC
High Hardness 62-65HRC
Impact Value ≥15J/CM^2
Balls Number ≥15000times
Microstructure M+C(C-Carbide  M-Martensite )

Other customized material

Series/Element C(%) Si(%) Mn(%) Cr(%) Cu(%) Mo(%) P(%) S(%)
80# 0.77-0.85 0.17-0.37 0.50-0.80 0-0.25 0-0.25 0-0.30 0-0.035 0-0.035
40Mn 0.37-0.44 0.17-0.37 0.70-1.0 0-0.25 0-0.25 0-0.30 0-0.035 0-0.035
40Mn2 0.37-0.44 0.17-0.37 1.40-1.80 0-0.25 0-0.25 0-0.30 0-0.035 0-0.035
70Mn 0.65-0.75 0.17-0.37 0.90-1.20 0-0.25 0-0.25 0-0.30 0-0.035 0-0.035
70Mn2 0.65-0.75 0.20-0.45 1.4-1.8 0-0.25 0-0.25 0-0.30 0-0.035 0-0.035
40Cr 0.37-0.45 0.17-0.37 0.50-0.8 0.80-1.1 0-0.25 0-0.30 0-0.035 0-0.035
70Cr2 0.65-0.75 0.20-0.30 0.75-0.90 0.55-0.70 0-0.25 0-0.30 0-0.030 0-0.030
B1 0.52-0.65 0.17-0.37 0.60-1.2 0-0.25 0-0.25 0-0.30 0-0.035 0-0.035
B2B 0.58-0.65 0.17-0.37 0.90-1.0 0.60-0.65 0-0.25 0-0.30 0-0.035 0-0.035
B4 0.60-0.65 1.60-1.70 0.70-0.80 0.70-0.80 0-0.25 0-0.30 0-0.035 0-0.035
B-6 0.75-0.85 0.2-0.40 0.90-1.0 0.85-0.95 0-0.25 0.06-0.13 0-0.035 02-0.035
B-6A 0.82-0.95 0.20-0.40 0.92-1.02 0.80-0.95 0-0.25 0.06-0.10 0-0.035 0-0.035
B-7 0.35-0.40 0.17-0.37 0.70-0.80 0.90-1.0 0-0.25 0-0.30 0-0.035 0-0.035
BV 1-1.06 0.17-0.37 0.9-1.0 0.55-0.65 0-0.25 0-0.30 0-0.035 0-0.035
GCr15 0.95-1.05 0.15-0.35 0.20-0.40 1.30-1.65 0-0.25 0-0.10 0-0.027 0-0.20
16Mn 0.13-0.19 0.2-0.6 1.2-1.6 0-0.30 0-0.25 0-0.03 0-0.03

Forged Steel Ball Production Process

1)Fully automatic production line of hot rolling steel ball
Raw material testing→Material on storage rack→automatic continued feeding device→furnace heating→
enter into rolling ball machine→automatic isothermal transfer→quenching system→steel ball heating preservation device→finished steel ball testing→package→transport to warehouse

2)Automatic production line of hot forging steel ball
Raw material testing→Material on storage rack→furnace heating→hot cutting→preforging→enter into rolling ball machine →automatic isothermal system transport
→quenching system→steel ball heating preservation device→finished steel ball testing
→package→transport towarehouse

3)Traditional production line of forged steel ball
Raw material testing→Cutting raw material→furnace heating→forging→automatic isothermal system→quenching system→steel ball heating preservation device→finished steel ball testing→package→transport to warehouse

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