Wear (Abrasion) Resistant Cast Steel

Wear-resistant (or abrasion-resistant) cast steel is a type of cast steel. It refers to the cast steel with good wear resistance. According to chemical composition, it is divided into non-alloy, low-alloy and alloy wear-resistant cast steel. There are many types of wear-resistant steel, which can be roughly divided into high-manganese steel, medium and low-alloy wear-resistant steel, chromium-molybdenum-silicon-manganese steel, cavitation-resistant steel, wear-resistant steel, and special wear-resistant steel. Some general alloy steels such as stainless steel, bearing steel, alloy tool steel and alloy structural steel are also used as wear-resistant steel under specific conditions.

Brief Information of Resistant Cast Steel

Category Alloy Steel
Definition A type of alloy steel with high hardness and anti-wearing performance
Heat Treatment Annealing, Normalizing, Quenching, Tempering (QT), Solid Solution
Alloy Elements Mn, Cr, Mo, Ni, C
Weldability Medium
Magnetic Medium
Typical Grades UNS J91109, UNS J91119, UNS J91129, UNS J91149, M13 Series
Applications Railway Trains, Construction Machinery, Grinding Ball

Medium and low-alloy wear-resistant steels usually contain chemical elements such as silicon, manganese, chromium, molybdenum, vanadium, tungsten, nickel, titanium, boron, copper, rare earths, etc. The liners of many large and medium-sized ball mills in the United States are made of chromium-molybdenum-silico-manganese or chromium-molybdenum steel. Most of the grinding balls in the United States are made of medium and high carbon chromium molybdenum steel. For workpieces that work under relatively high temperature (for example, 200~500℃) abrasive wear conditions or whose surfaces are subjected to relatively high temperatures due to frictional heat, alloys such as chromium molybdenum vanadium, chromium molybdenum vanadium nickel or chromium molybdenum vanadium tungsten can be used.

Abrasion is a phenomenon in which the material on the working surface of an object is continuously destroyed or lost in relative motion. Divided by the wear mechanism, wear can be divided into abrasive wear, adhesive wear, corrosion wear, erosion wear, contact fatigue wear, impact wear, fretting wear and other categories. In the industrial field, abrasive wear and adhesive wear account for the largest proportion of workpiece wear failures, and wear failure modes such as erosion, corrosion, fatigue, and fretting tend to occur in the operation of some important components, so they are getting more and more attention. Under working conditions, several forms of wear often appear at the same time or one after another, and the interaction of wear failure takes on a more complex form. Determining the type of wear failure of the workpiece is the basis for the reasonable selection or development of wear-resistant steel.

In addition, the wear of parts and components is a system engineering problem. There are many factors that affect wear, including working conditions (load, speed, movement mode), lubrication conditions, environmental factors (humidity, temperature, surrounding media, etc.), and material factors ( Composition, organization, mechanical properties), surface quality and physical and chemical properties of parts. Changes in each of these factors may change the amount of wear and even change the wear mechanism. It can be seen that the material factor is only one of the factors that affect the wear of the workpiece. To improve the wear resistance of steel parts, it is necessary to start with the overall friction and wear system under specific conditions to achieve the desired effect.

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