Material Requirements for Wear-Resistant Parts of Crushers in Mining Applications

In the mining industry, crushers are subjected to extreme conditions involving high-impact forces, abrasive materials, and corrosive environments. The selection of materials for wear-resistant parts is crucial to ensure the durability and performance of these machines. This article explores the key material requirements for wear-resistant parts of crushers in mining applications.

Impact Resistance and Toughness

High-Manganese Steel for Strong Impact Zones

High-manganese steel, such as Mn13 and its variants like Mn13Cr2, is widely used in mining crushers due to its excellent impact resistance and toughness. This material exhibits a phenomenon known as work hardening, where its surface layer rapidly hardens under the influence of large impact or contact stresses. This hardening process significantly enhances the wear resistance of the material, making it ideal for high-impact zones like the breaking walls and concave surfaces of cone crushers, as well as the jaw plates of jaw crushers.

The work-hardening index of high-manganese steel is several times higher than that of other materials, allowing it to maintain high wear resistance even under severe impact conditions. However, it’s important to note that high-manganese steel requires sufficient impact force to trigger its work-hardening mechanism. In applications with low impact or contact stresses, its wear resistance may not be fully utilized.

Alloy Steel for Balanced Performance

Alloy steels, including low-carbon medium-alloy and medium-carbon low-alloy steels, offer a balanced combination of strength, hardness, and toughness. These materials are often used in areas where both impact resistance and wear resistance are required, such as the hammer heads of hammer crushers and the impact plates of impact crushers.

By adjusting the composition and heat treatment process, alloy steels can achieve high hardness and good toughness simultaneously. This makes them suitable for withstanding the repeated impacts and abrasive wear encountered in mining operations. Additionally, alloy steels can be tailored to specific applications by varying the content of elements like chromium, molybdenum, and nickel to enhance their corrosion resistance and other properties.

Wear Resistance and Hardness

High-Chromium Cast Iron for High-Wear Areas

High-chromium cast iron is renowned for its exceptional wear resistance, making it an ideal choice for high-wear areas of crushers. This material contains a high percentage of chromium, which forms hard carbides within the matrix, providing a protective layer against abrasive wear. High-chromium cast iron is commonly used in the manufacture of grinding balls, liners for ball mills and autogenous mills, and the wear plates of hammer crushers.

The hardness of high-chromium cast iron can reach 58HRC or higher, ensuring long-lasting performance even under severe abrasive conditions. However, its relatively low toughness makes it susceptible to brittle fracture under high-impact loads. Therefore, high-chromium cast iron is best suited for applications where the primary wear mechanism is abrasion rather than impact.

Martensitic Wear-Resistant Steel for Versatile Applications

Martensitic wear-resistant steels, such as those with a martensitic matrix structure, offer a good balance of wear resistance and toughness. These materials are suitable for a wide range of applications in mining crushers, including the liners of cone crushers and the wear parts of hammer crushers.

Martensitic wear-resistant steels achieve their high hardness through heat treatment processes like quenching and tempering. This allows them to resist abrasive wear while maintaining sufficient toughness to withstand impact loads. Additionally, these steels can be further enhanced by adding alloying elements like chromium and molybdenum to improve their corrosion resistance and other properties.

Corrosion Resistance and Chemical Stability

Stainless Steel for Corrosive Environments

In mining operations where the crushed materials contain corrosive substances like acids or salts, stainless steel becomes an essential material for wear-resistant parts. Stainless steel contains chromium, which forms a passive oxide layer on the surface, protecting the material from corrosion. This makes it ideal for applications in wet grinding processes or where the crushed materials are highly corrosive.

Stainless steel can be used in various parts of crushers, including the liners, hammer heads, and impact plates. Its excellent corrosion resistance ensures long service life and reduces the need for frequent replacements, thereby lowering maintenance costs. Additionally, stainless steel’s good mechanical properties, such as strength and toughness, make it suitable for withstanding the impact and abrasive wear encountered in mining operations.

Composite Materials for Enhanced Performance

Composite materials, which combine two or more different materials with distinct properties, offer enhanced performance in terms of wear resistance, corrosion resistance, and mechanical properties. For example, metal-ceramic composites can combine the high hardness and wear resistance of ceramics with the toughness and ductility of metals, making them ideal for high-wear and high-impact applications in mining crushers.

Another example is rubber-metal composites, which combine the excellent wear resistance and elasticity of rubber with the strength and rigidity of metals. These composites are often used in low-wear and low-impact areas of crushers, such as the side liners and dust seals, where they can provide effective protection against abrasive wear while reducing noise and vibration.

Tangshan Polarislink Advanced Materials Technology Co., Ltd. was established in 1996 and is located in Tangshan, Hebei Province, China. The company is a source manufacturer specializing in wear parts for mining machinery. Relying on its own core factory, the company has been deeply engaged in heavy manufacturing for nearly 30 years, forming a stable industrial foundation centered on manufacturing capability.

The main products include high manganese steel hammers, jaw plates, bushings, mantles, impact plates, high chromium blow bars, cast steel bushings （Mn13/Mn13Cr2，Mn18/Mn18cr2，Mn22/Mn22Cr2） and various other wear-resistant castings, which are widely used in mining crushing, sand and aggregate production, cement and building materials industries. The company is certified by CE and ISO9001, and is capable of long-term batch supply and high-standard customized delivery.

The manufacturing base covers about 100,000 square meters, with a building area of 36,000 square meters, and is equipped with a complete production system including melting, casting, machining, heat treatment and final inspection. With 11 medium-frequency furnaces of 2–10 tons, 2 refining furnaces of 25 tons, 18 heat-treatment furnaces and more than 30 large CNC machines, the annual comprehensive capacity exceeds 50,000 tons, enabling stable production of large, high-strength and high-wear-resistant industrial castings.Official website address:https://www.polarislink.net/