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IMPACT CRUSHER BLOW BARS
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IMPACTOR BLOW BARS
Blow bars are thick slabs of metal, typically some mixture of chrome, that are forged for the purpose of effectively breaking apart material like asphalt, concrete, limestone, etc.
Blow bar is a critical part during the crushing process with horizontal shaft impactor. Materials of the blow bars are usually selected according to the function of the impact crusher.
When set in the horizontal impact crushers, blow bars are inserted into the rotor and rotated at high speeds, making the whole rotor assembly spins repeatedly striking the material. During this process, the blow bar fractures the materials until it meets the appropriate size to fall out through the impact crusher chamber.
IMPACT CRUSHER BLOW BARS
Why Choose Our Blow Bars for Impact Crusher?
① We offer OEM interchangeable impact crusher parts & liners;
② We provide a wide range of optional materials for blow bars;
③ We produce more wear-resistant products;
④ We extend the service life of the impact crusher liners;
⑤ We provide more reasonable and competeable prices;
⑥ We provide more professional services and suggestions.
Genuine Alternative Spare Parts – Impact Crusher Blow Bars Made by NFLG MINING®
NFLG® offers different designs and manufactures various solutions of blow bar for an extensive range of OEM horizontal impact crusher brands including: Hazemag, Mesto, Kleemann, Rockster, Rubble Master, Powerscreen, Striker, Keestrack, McClosky, Eagle, Tesab, Finlay and others.
NFLG® “Genuine Alternative” blow bars are designed to extend wear life, provide a perfect interchangeable fitting for your impactor, and increase production rates while decreasing costs-per-ton.
Notice: The following table does not include all the accessories that we can produce. If you need bars from other brands, or know the OEM serial number of the blow bars that you are looking to replace, or can provide the drawing of the bars that you need to customize, please feel free to contact us by email or call.
Models
| Nordberg NP Series | Lokotrack LT Series | KLEEMANN | ROCKSTER |
|---|---|---|---|
| NP1313 NP1415 NP1620 NP2023 NP1110 BP13 NP15 NP20 | LT1110 LT1213 LT1213S LT1315 Nordtrack I908S | MR 110 Z EVO2 MR 122 Z MR 130 Z EVO2 MR 150 Z MR 170 Z MF 14 S MF 16 S | R700S R900 R1000S R1100S R1100DS |
| Finlay | Striker | TESAB | McCloskey |
| I-140 I-140RS I-120 I-120RS IC-110 IC-110RS IC-100 IC-100RS | HQ907 HQ910 HQ1112 HQ1312 HQR907 HQR910 HQR1112 HQR1312 | 623CT 1012T 1012TS 1412T | I44v3 I44Rv3 I54v3 I54Rv3 I34 I34R |
| HAZEMAG HPI-H Series | HAZEMAG HPC Series | HAZEMAG HSI Series | HTI Series |
| HPI-H 1010 HPI-H 1214 HPI-H 1414 HPI-H 1615 HPI-H 1618 | HPC-1414 HPC-1615 HPC-1618 HPC-1622 HPC-1822 HPC-2022 HPC-2025 HPC-2030 | HSI 1007 HSI 1010 HSI 1014 HSI 1414 HSI 1420 HSI 1625 HSI 1630 | HTI 1005 HTI 1010 HTI 1014 |
| HAZEMAG HPI Series | Eagle Crusher | RUBBLE MASTER | POWERSCREEN |
| HPI-1622 HPI-1822 HPI-2022 HPI-2025 HPI-2030 HPI-2225* HPI-2230 HPI-2530 | UM-04 UM-05 UM-15 UM-25 UM-45 UM-69 | RM 60 RM 70GO! 2.0 RM 90GO! RM 100GO! RM 120GO! RM V550GO! | TRAKPACTOR 230 TRAKPACTOR 230SR TRAKPACTOR 320 & 320SR TRAKPACTOR 550 TRAKPACTOR 550SR |
Metallurgy of the Blow Bars
NFLG impact crusher blow bars are available in a variety of metallurgies to accomodate your unique crushing needs. The range of metallurgies includes Manganese, Low Chrome, Medium Chrome, High Chrome, Martensitic and Composite Ceramic.
As shown in the figure, an increase in the steel’s wear resistance (hardness) is usually accompanied by a reduction in toughness (impact resistance) of the material.
MANGANESE STEEL
The wear resistance of manganese steel with austenitic structure is attributable to the phenmenon of work hardening. The impact and pressure load results in a hardening of the austenitic structure on the surface. The initial hardness of manganese steel is approx. 20 HRC. The impact strength is approx. 250J/cm².
After the work hardening, the initial hardness can thereby reach upto approx. 50 HRC. The deeper-set, not yet hardened layers thereby provide for the great toughness of this steel. The depth and hardness of the work-hardened surfaces depend on the application and type of manganese steel.
Manganese steel has a long history. Today, this steel is used mostly for crusher jaws, crushing cones and crushing shells (mantles & bowl liners). In the impact crusher, it is only recommended to use manganese blow bars when crushing less abrasive and very large feed material (e.g. limestone).
CHROME STEEL
With chrome steel, the carbon is chemically bonded in the form of chromium carbide. The wear resistance of chrome steel is based on these hard carbides of the hard matrix, whereby the movement is hindered by offsets, which provides for a high degree of strength but at the same time less toughness.
To prevent the material from becoming brittle, the blow bars must be heat-treated. It must thereby be observed that the temperature and annealing time parameters are exactly adhered to. Chrome steel typically has a hardness of 60 to 64 HRC and a very low impact strength of 10 J/cm².
To prevent breakage of chrome steel blow bars, there may not be any unbreakable elements in the feed material.
NFLG Chrome Iron Blow Bars Elements
| High Chrome Casting Material Chemical Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Code Elem | Cr | C | Na | Cu | Mn | Si | Na | P | HRC |
| KmTBCr4Mo | 3.5-4.5 | 2.5-3.5 | / | / | 0.5-1.0 | 0.5-1.0 | / | ≤0.15 | ≥55 |
| KmTBCr9Ni5Si2 | 8.0-1.0 | 2.5-3.6 | 4.5-6.5 | 4.5-6.5 | 0.3-0.8 | 1.5-2.2 | 4.5-6.5 | / | ≥58 |
| KmTBCr15Mo | 13-18 | 2.8-3.5 | 0-1.0 | 0-1.0 | 0.5-1.0 | ≤1.0 | 0-1.0 | ≤0.16 | ≥58 |
| KmTBCr20Mo | 18-23 | 2.0-3.3 | ≤2.5 | ≤1.2 | ≤2.0 | ≤1.2 | ≤2.5 | ≤0.16 | ≥60 |
| KmTBCr26 | 23-30 | 2.3-3.3 | ≤2.5 | ≤2.0 | ≤1.0 | ≤1.2 | ≤2.5 | ≤0.16 | ≥60 |
MARTENSITIC STEEL
Martensite is a completely carbon-saturated type of iron that is made by quick cooling-off. It is only in the subsequent heat treatment that carbon is removed from the martensite, which improves the strength and wear properties. The hardness of this steel ranges between 44 to 57 HRC and the impact strength between 100 and 300 J/cm².
Thus, with regard to hardness and toughness, martensitic steels lie between manganese steel and chrome steel. They are used if the impact load is too little to harden the manganese steel, and/ or good wear resistance is required along with good impact stress resistance.
METAL MATRIX WITH CERAMIC COMPOSITES
Metal Matrix Composites, combine the high resistance of the metal matrix with extremely hard ceramics. Porous preforms made of ceramic particles are produced in the process. The metallic molten mass penetrates into the porous ceramic network. The experience and knowledge are particular to the casting process in which two different materials – steel with a thichness of 7.85 g/cm³ and ceramic with a thickness of 1-3 g/cm³ – are combined and there is a thorought infiltration.
This combination makes the blow bars especially wear-resistance but at the same time very impact-resistant. WIth blow bars made of composites from the field of ceramics, a service life that is three to five times as long as that of martensitic steel can be achieved.
☛ Learn More about NFLG™ MMC Ceramic Blow Bars.