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Jiangyin Dongbang Steel Ball Machinery Co.,Ltd

ADD:NO.42 Hua Lu Road, Huashi Town, Jiangyin City, Jiangsu Province

Tel:86-0510-86370386

Mobile:86-13812104338

Fax:86-0510-86370552

Email:grindingballsmedia@163.com

40mm Forged Grinding Balls for Ball Mill

40mm Forged Grinding Balls For Ball Mill Introduction DongBang brand 40mm forged grinding balls for ball mill, can be used for various mines, like Iron ore, Gold, Copper, Silver, etc. By our unique heatment technology, we promise you 63-65 HRC no breaking. Technical datas Application: 40mm...

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40mm Forged Grinding Balls For Ball Mill Introduction 
DongBang brand 40mm forged grinding balls for ball mill, can be used for various mines, like Iron ore, Gold, Copper, Silver, etc. By our unique heatment technology, we promise you 63-65 HRC no breaking.
图片71.png 
 

Technical datas
Application: 40mm Forged Grinding Balls For Ball Mill, the major grinding media for mineral process used for phase 2 ball mill
Certification: ISO9001, ISO14001, OHSAS18001, etc.
Material: Carbon alloy steel rods
Original: Jiangyin, Jiangsu, China
Market: Woldwide
Packing: export standard, Iron drum or Ton bag
Delivery date: Negotiable
Price: Negotiable
MOQ: 50 metric tons per ball size
Detailed quality performance of 40mm ball media for ball mill:

                                                                                Chemical Comments of Steel Rod Type: B2

C

Si

Mn

P

S

Cr

0.76-0.82

0.17-0.35

0.72-0.80

≤0.020

≤0.015

0.50-0.60

Ni

Cu

Mo

Alt

V


≤0.25

≤0.20


0.020-0.050



40mm Forged Grinding Balls For Ball Mill, Quality Performance

Ball Size

Surface Hardness

Core Hardness

Volume Hardness

40mm

62-64 HRC

61-63 HRC

61-64 HRC

Production Method: Steel rod heating by induction—Hot Rolling—Slow Cooling—Quenching—2nd quenching by our unique quenching chemical media—Cooling--Tempering

Or

                                                                                 Chemical Comments of Steel Rod Type: B2-1

C

Si

Mn

P

S

Cr

0.77-0.81

0.26-0.34

0.72-0.80

≤0.020

≤0.015

0.32-0.40

Ni

Cu

Mo

Alt

V


≤0.25

≤0.20

/

0.020-0.050

/


40mm Forged Grinding Balls For Ball Mill, Quality Performance

Ball Size

Surface Hardness

Core Hardness

Volume Hardness

40mm

61-63 HRC

60-62 HRC

60-63 HRC

Production Method: Steel rod heating by induction—Hot Rolling—Slow Cooling—Quenching—2nd quenching by our unique quenching chemical media—Cooling--Tempering


Core Technology:


New developed heat treatment technology on hot rolling grinding ball

In 2014, the specialists of JiangYin DongBang Steel Ball Machinery Co., Ltd, conducted a complex process of research on heat treatment on grinding balls, resulting in a technology has beed developed “DB-OC”. 


DB-OC is by the theory of oil cooling for steel products, but consider the hot rolled grinding balls is very hot, put into oil may cause fire disaster, we take more than 18 monthes to develop a special quenching chemical media to instead the oil, by this special quenching chemical media, it can improve the grinding ball quality on hardness and impact toughness a lot. 


By thousands of tests conducted and the results finally confirm that the technology of heat treatment: “DB-OC” can help to get high quality, totally can be improved 20-30% by use this special technology, show as below: 

1.Deeper quenching; 

2.Achieve higher hardness;

3.Very lower breaking rate;

4.Smaller martensite grain find under microscope. 

5.Microstructure picture as below:

图片72.jpg


Our Production Line Pictures: 

a)Automatic feeding device of induction furnace:

图片73.png

b)Induction furnace and rolling machine:

图片74.png

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