Special Alloy Steel

Special alloy steel refers to an iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements to ordinary carbon steel. Depending on the added elements and appropriate processing techniques, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic properties can be obtained.

The main alloying elements of alloy steel are silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron, rare earths, etc. Among them, vanadium, titanium, niobium, zirconium, etc. are strong carbide-forming elements in steel. As long as there is enough carbon, under appropriate conditions, their respective carbides can be formed. When carbon is lacking or under high temperature conditions, atoms will form. The state enters the solid solution; manganese, chromium, tungsten, and molybdenum are carbide-forming elements, part of which enters the solid solution in the atomic state, and the other part forms replacement alloy cementite; aluminum, copper, nickel, cobalt, silicon, etc. do not form Carbide elements generally exist in solid solution in an atomic state.

There are many types of alloy steel, which are divided into alloy structural steel, stainless steel, acid-resistant steel, wear-resistant steel, heat-resistant steel, alloy tool steel, rolling bearing steel, alloy spring steel and special performance steel (such as soft magnetic steel, permanent Magnetic steel, non-magnetic steel), etc.

In addition to iron, carbon and a small amount of inevitable silicon, manganese, phosphorus and sulfur elements, steel also contains a certain amount of alloying elements. The alloying elements in steel include silicon, manganese, molybdenum, nickel, nickel, vitriol and titanium. , niobium, boron, lead, rare earth, etc. One or more of them, this kind of steel is called alloy steel. Each alloy steel system varies with their respective resource conditions, production and use conditions. Foreign countries have developed nickel, nickel, and nickel in the past. Steel system, China has found an alloy steel system based on silicon, manganese, vanadium, titanium, niobium, boron, lead, and rare earths. Alloy steel accounts for about ten percent of the total steel production and is generally smelted in electric furnaces. Alloy steel can be divided into 8 categories according to its use. They are: alloy structural steel, spring steel, bearing steel, alloy tool steel, high-speed tool steel, stainless steel, heat-resistant and non-scaling steel, and silicon steel for electrical purposes.