As materials rubbed across one another over a period of time, abrasion can occur. Abrasion can be intentional through processes like blasting, grinding, and sanding. But, unintentional abrasion can make components fail. Thus, proper materials must be used to make sure the surface doesn’t result in parts or structures break down unexpectedly. Generally, steel is resistant to abrasion; however, not all steels are equal. Abrasion-resistant steels are e especially made to prevent wear. Whether you need a steel channel, steel tubing, or any other steel products, you want to use abrasion resistant steel to ensure the quality of the product and maintain the integrity of your building.
How Abrasion-Resistant Steel is Made
This kind of steel is made out of alloying elements such as carbon, iron ore and others. The process includes melting the iron ore in a blast furnace to eliminate undesirable substances that the iron may have. At this stage, carbon and alloying elements are added. Abrasion resistant steel tends to have more amounts of alloying elements like carbon, manganese, and chromium. These are meant to ensure the steel is less susceptible to wear. Also, the molten pool is added with substances which can prevent oxidation. This process is followed by shaping, heat treating, and cutting the molten abrasion resistant steel.
How Steel Becomes Resistant to Abrasion
Abrasion resistant steel has a chemical composition which makes it more immune to wear than other kinds of steel. The abrasion resistance can be increased by adding other alloys. Carbon is meant to block discoloration which increases the steel’s strength and hardness. Also, extra carbon lets the steel form microstructures with increased hardness after being heated and quenched.
Moreover, the resistance of steel to abrasion has also to do with heat treatment. This steel should have a microstructure which let have significant hardness. Adding proper alloying elements can accomplish this in part but the steel should go through a heating process and a rapid quenching to form the microstructures like bainite and martensite which offers the steel the high hardness value required. It is important to ensure though that heating steel to a high enough temperature may cause an annealing effect. As a result, the steel will lose some of its hardness and resistance to abrasion.
Kinds of Abrasion Resistant Steel Grades
Typically, every grade is made to a certain Brinell hardness value. The AR400 is a common grade of this kind of steel. The “400” stands for the Brinell hardness value. Other grades include Ar450 and Ar500. These steel grades are used in applications like cement pouring and forming equipment, mining equipment, as well as excavation equipment.