40mm Large Steel Ball For Ball Mill Introduction
DongBang brand 40mm large steel ball 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 Large Steel Ball For Ball Mill 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 Large Steel Ball 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 Large Steel Ball 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—Screw Rolling Forging—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 Large Steel Ball 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—Screw Rolling Forging—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:
Our Production Line Pictures:
a)Automatic feeding device of induction furnace:
b)Induction furnace and rolling machine:
