Abrasion Resistant Castings

Abrasion-resistant castings are a type of cast iron or steel alloy designed to withstand wear and tear from abrasive materials like sand, dirt, and minerals. They are commonly used in industries such as mining, earth moving, and manufacturing, where components are subjected to high levels of abrasive wear. 

Types and Materials

Abrasion-resistant castings can be categorized into different groups based on their chemical composition. The most common types are:

• Ni-Hard: This group consists of nickel-containing alloys and has been a standard for abrasion resistance for decades.
• Hi-Chrome Iron: This group contains high levels of chromium and is often superior to Ni-Hard when both toughness and corrosion resistance are required.
• Wear-resistant cast steel: This type can be further divided into non-alloy, low-alloy, and alloy wear-resistant cast steel, with different compositions for various applications and heat treatments. 

These materials are often used for parts that are frequently in contact with abrasive substances, such as ball mill shell liners, impellers, and slurry pumps. 

The main applications are found in industries where heavy machinery is exposed to abrasive materials:

• Mining and Mineral Processing: Abrasion-resistant castings are essential for equipment that handles rocks, sand, gravel, and ores. Common parts include crushers, grinding mills, ball mill shell liners, impellers, and slurry pumps.
• Construction: Machinery in this sector, such as bulldozers, backhoes, and concrete mixers, requires durable parts that can handle rough environments and impacts.
• Cement Production: This industry uses these castings for parts like chain wheel segments, preheater tower components, and machinery that processes abrasive materials.
• Power Generation: Components in power plants, such as those in coal pulverizers, are often made from abrasion-resistant cast iron to handle mechanical wear and thermal stress.