Castings And Forgings Grinding Steel Ball With Material B2 And B3
1. Product introduction of grinding steel ball:
Grinding steel ball refers to the steel ball used for grinding mill
materials, actually is a kind of grinding body. It should be said
that wear-resistant steel ball is just a kind of ball grinding
steel ball, is not wear-resistant steel ball can also be called
grinding steel ball. Such as casting steel ball (high chromium
ball, medium chromium ball, low chromium ball), forging steel ball,
rolling steel ball, bearing steel ball can be called grinding steel
ball, where engaged in grinding operations can be called grinding
steel ball.
Steel balls are widely used in bearing, hardware, electronics, iron
art, mechanical equipment, electric power, mining, metallurgy and
other fields.
Castings And Forgings
2. Technical standard of grinding steel ball:
(1) Hardness test is the most important data for whether the
grinding steel ball is wear-resistant, which can be tested by
Rockwell hardness tester. Practice shows that the service life of
steel balls with HRC60 and above is more than twice of HRC40-50.
(2) Low chromium steel ball refers to chromium content ≤3.0%,
carbon content between 1.80%-3.30% of the steel ball is low
chromium ball, the national standard requirements of low chromium
ball hardness (HRC) must be ≥45 degrees above, if the use of low
chromium ball quality recommendations must use heat treatment
tempering or vibration aging treatment. If the test hardness (HRC)
is below 40 degrees, the low chromium ball hardness is insufficient
or overburning.
(3) Application field:
Grinding steel balls are widely used in metallurgical mines, cement
building materials, thermal power generation, flue gas
desulfurization, aerated concrete, magnetic materials, chemical
industry, coal water slurry, pellets, slag, ultrafine powder, fly
ash, calcium carbonate, quartz sand and other industries.
Castings And Forgings
3. Specification of grinding steel ball:
| Inch | Size | T weight(Kg) | Actual Diameter Range (mm) | Material | Surface hardness (HRC)+/-0.5
HRC | Core hardness (HRC)+/-0.5
HRC | Volume
Hardness (HRC)+/-0.5
HRC |
| 3/4 ” | D20MM | 0.039+/-0.005 | 19.3~22.3 | B2 | 63-66 | 62-64 | 63-66 |
| 1 ” | D25MM | 0.075+/-0.01 | 24.5~27.5 | B2 | 63-66 | 62-64 | 63-66 |
| 1 1/4 ” | D30MM | 0. 14+/-0.02 | 29.7~32.7 | B2 | 63-66 | 62-64 | 63-66 |
| 1 1/2 ” | D40MM | 0.31+/-0.04 | 39.6~43.6 | B2 | 63-66 | 62-64 | 63-66 |
| 2” | D50MM | 0.59+/-0.05 | 50~54 | B2 | 62-65 | 61-63.5 | 62-65 |
| 2 1/2 ” | D60MM | 1.0+/-0.05 | 60.4~64.4 | B2 | 62-65 | 59-61 | 61-64 |
| 2 1/2 ” | D65MM | 1.25+/-0.07 | 65.6~70.6 | B2 | 62-65 | 59-61 | 61-64 |
| 2 1/2 ” | D65MM | 1.25+/-0.07 | 65.6~70.6 | B3 | 61-63 | 58-60 | 58-62 |
| 3” | D75MM | 1.9+/-0. 1 | 76~81 | B2 | 61-63 | 59-62 | 60-63 |
| 3” | D75MM | 1.9+/-0. 1 | 76~81 | B3 | 61-63 | 58-60 | 58-62 |
| 3 1/2” | D90MM | 3. 1+/-0. 15 | 88~93.5 | B3 | 60-62 | 57-60 | 59-62 |
| 3 3/4” | D94MM | 3.5+/-0.2 | 92~97.5 | B3 | 60-62 | 57-60 | 59-62 |
| 4” | D100MM | 4. 1+/-0.2 | 98~103 | B3 | 60-62 | 57-60 | 59-62 |
| 4.2” | D105MM | 4.76+/-0.2 | 103~108 | B3 | 59-62 | 57-60 | 59-62 |
| 4.5” | D115MM | 6.3+/-0.2 | 113~118 | B3 | 59-62 | 57-60 | 58-62 |
| 5” | D125MM | 8.2+/-0.3 | 123~128.5 | B3 | 58-62 | 57-60 | 58-62 |
Castings And Forgings
Material
| | C | Si | Mn | P≤ | S≤ | Cr | Ni ≤ | Cu≤ |
| B2 | 0.72-0.86 | 0. 15-0.37 | 0.70-0.80 | 0.035 | 0.035 | 0.20-0.60 | 0.25 | 0.25 |
| B3 | 0.58-0.66 | 1.30- 1.90 | 0.40-0.80 | 0.035 | 0.035 | 0.70-0.90 | 0.25 | 0.25 |
Castings And Forgings
Castings And Forgings
Castings And Forgings
