Select The Appropriate Material for Customized Blow Bars for Impact Crusher
The blow bar is a crucial consumable item for impact crushers, typically comprising a chrome-based mixture. The primary function of the blow bar is to repeatedly rotate at high speed to impact the aggregate, thereby breaking down materials such as asphalt, concrete, limestone, and others to achieve the desired particle size.
Typically, users select the appropriate blow bar material based on the specific functions of their impact crusher.
CAFU's impact crusher blow bar is available in a wide range of materials to suit your specific requirements, including manganese, low chrome, medium chrome, high chrome, martensitic and composite ceramic.
High Manganese Steel
Given the characteristics of manganese steel with an austenitic structure, high manganese steel is typically selected for less abrasive aggregates (e.g., limestone) and larger feed sizes in impact crusher applications.
Chromium Steels
The chrome steel blow bars for impact crusher is a crucial component, also known as an impact crusher plate hammer or hammer head. Typically, these bars are crafted from wear-resistant materials, such as high-chrome alloys, which offer high hardness and wear resistance, making them ideal for use in crushing ores, rocks, and other materials.
The key features and benefits of the chrome steel impact crusher striking bar include:
• The product is highly resistant to abrasion, made from high chrome alloy and other wear-resistant materials, which enable it to withstand the impact and abrasion of materials during the crushing process, thus prolonging its service life.
• This product offers high crushing efficiency thanks to its reasonable design, which effectively crushes materials into the required particle size, thereby improving crushing efficiency.
• It is highly adaptable and suitable for use with a wide range of materials, regardless of hardness or particle size.
When selecting a chrome steel impact crusher blow bar, it is essential to consider the following factors:
• Material characteristics, including hardness, particle size, and humidity, must be considered to ensure the percussion bar can meet the crushing requirements of the material.
• Crusher type: It should be noted that different type of impact crushers may require different sizes and shapes of blow bars.
Due to the low toughness of chrome steel, blow bars must undergo a heat treatment process and the parameters such as temperature range and annealing time must be strictly controlled in order to prevent the material from becoming brittle.
Martensitic Steels
The primary alloying elements of martensitic steels are iron, chrome, and carbon. While martensitic steels offer high strength and hardness, they have relatively poor plasticity and toughness. Consequently, during the heat treatment process, carbon is removed from the martensite in order to enhance the material's strength and wear resistance.
In terms of hardness and toughness requirements, martensitic steels occupy an intermediate position between manganese and chrome steels. They offer good wear resistance and good resistance to impact stresses. In case of weak impact capacity, martensitic steel should be preferred as it cannot harden the surface of manganese steel.
Alloy Steel & High Chromium Ceramic Composites
Alloy steel and high-chromium ceramic composites offer a unique combination of high wear resistance and extremely hard ceramics. The liquid metal is drawn into the porous ceramic network by the ceramic preform, which allows the composite to be formed.
This composite makes the blow bar particularly wear-resistant and also provides excellent impact resistance. The ceramic microhardness of the infiltrated composite is ≧1800HV, which significantly extends the service life by 80-100%.
As previously noted, the enhancement of steel wear resistance (hardness) is typically accompanied by a reduction in toughness (impact resistance). Consequently, when selecting blow bars for impact crusher, it is essential to consider the specific application environment holistically to identify the optimal alloy material for achieving the best overall performance.
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