Blow Bars For Impact Crusher

We have various kind of material solutions for blow bars to work in different conditions from low to high wear or impact, to reduce the cost for our customers.

Solutions for blow bars:

High manganese with ceramic inserts blow bars

High manganese blow bars are used for applications with large feeding size and high impact, but not suitable for high abrasive materials because of low wear resistance. With high hardness ceramic inserts, it will largely increase the hardness on the wear face and increase the service life.

Martensitic steel blow bars

Blow bars made of martensitic steel are used in primary or secondary crushing applications where high wear or impact both exists. In these applications the Mn steel is not suitable for its low hardness whereas chromium white iron is not durable for impact.

Martensitic steel with ceramic inserts blow bars

When inserted with high hardness ceramics, the martensitic steel blow bar is dramatically enforced for wear resistance on the wear surface. This makes them the ideal solutions used in primary or secondary crushing where wear and impact resistance are both required. The life time is doubled or longer on martensitic blow bars without ceramic inserts.

High chromium blow bars

The blow bars are made of white iron casting with 26%-28% chromium (Cr) contents. High Cr content provides very good wear resistance for the blow bar but naturally lack of impact toughness against shock. These blow bars are normally used in secondary or tertiary crushing applications where high abrasive is required with no harsh impact.

High chromium blow bars with ceramic inserts

When used in the same applications, the high chromium blow bars with ceramic inserts will largely increase the hardness on the wear face, as a results, the blow bars will obtain excellent wear resistance and much longer lifetime than blow bars in high chromium casting.

We provide genuine and after-market blow bars for many international brands, and custom-made solutions as well according to customers' specifications.

The Advantages of MMC Blow Bars

1. More wear resistant

Compared with conventional martensitic blow bars, MMC martensitic blow bar with ceramic inlays has higher hardness on the wear faces while no compromise on its strength of basic martensitic steel. It can be applied in most cases which conventional martensitic blow bars are used and obtains up to 2 times or longer life time of conventional martensitic blow bars.

2. Longer life time than conventional blow bars, hence less downtime and lower operation cost

Although chrome white iron blow bars is outstanding for its high hardness, in some cases of crushing very abrasive materials like granite, more wear resistant chrome blow bars are needed. MMC chrome white iron blow bar with ceramic inlays is a good solution for crushing such high abrasion materials. With further hardness increased by inlaying ceramics on wear faces, the blow bar can achieve as long as 2 times or longer service life of conventional chrome blow bars.

The Advantages of MMC Blow Bars

MaterialsRecommendationRisk of Breakage
Martensitic
  • Building rubble and concrete
  • Blasted limestone
  • The impact loads are too low to harden the manganese steel
  • A large proportion of unbreakable objects in the feed material
  • Very large feed material
Martensitic with ceramic
  • Recycling of building rubble with little to medium iron content
  • Asphalt
  • Natural stone
  • Large feed size
  • Very low abrasiveness, material fatigue can result after a too long service life
Chrome
  • Secondary crushing level for abrasive applications in natural stone
  • Smaller feed sizes, e.g. gravel
  • Unbreakable objects in the crushed material
  • Too large feed size
Chrome with ceramic
  • Secondary crushing level with natural stone or river gravel
  • Asphalt in case of smaller feed size (milled material) and without any iron content
  • Large feed size (primary crusher)
  • Iron content in the crushed materials (high risk of breakage)
Manganese
  • Very low abrasiveness, e.g. limestone
  • When there is a very high proportion of unbreakable objects in the feed materials (e.g. iron), or if other blow bars are not cost-effective
  • Very large feed size