HARDOX400 wear-resistant steel plate

Wear-resistant steel plate consists of two parts: a low-carbon steel plate and an alloy wear-resistant layer, with the alloy wear-resistant layer generally accounting for 1/3 to 1/2 of the total thickness. During operation, the base provides comprehensive properties such as strength, toughness, and plasticity to resist external forces, while the alloy wear-resistant layer provides the wear resistance required for specific working conditions.

The alloy wear-resistant layer and the base plate of the wear-resistant steel plate are metallurgically bonded. Through specialized equipment and automatic welding processes, high-hardness self-protecting alloy welding wire is uniformly welded onto the base plate, with composite layers ranging from one to two or even multiple layers. During the composite process, due to the different shrinkage ratios of the alloys, uniform transverse cracks appear, which is a significant characteristic of wear-resistant steel plates.

The alloy wear-resistant layer is mainly composed of chromium alloy, with additional alloying elements such as manganese, molybdenum, niobium, and nickel. The microstructure shows carbides distributed in a fibrous pattern, with the fiber direction perpendicular to the surface. The microhardness of the carbides can reach HV1700-2000 or higher, and the surface hardness can reach HRC58-62. The alloy carbides exhibit strong stability at high temperatures, maintaining high hardness and excellent oxidation resistance, allowing for normal use up to 500°C.

The wear-resistant layer can appear in forms such as narrow tracks (2.5-3.5mm), wide tracks (8-12mm), and curves (S, W). It is primarily composed of chromium alloy, with additional alloying elements such as manganese, molybdenum, niobium, nickel, and boron. The microstructure shows carbides distributed in a fibrous pattern, with the fiber direction perpendicular to the surface. The carbide content is 40-60%, the microhardness can reach HV1700 or higher, and the surface hardness can reach HRC58-62.

Wear-resistant steel plate is mainly divided into three categories: general-purpose, impact-resistant, and high-temperature resistant. The total thickness of wear-resistant steel plate can be as thin as 5.5 (2.5+3) mm and as thick as 30 (15+15) mm. Wear-resistant steel plate can be rolled into wear-resistant pipes with a minimum diameter of DN200, and can be processed into wear-resistant elbows, wear-resistant tees, and wear-resistant reducers.

Wear-resistant steel plate has high wear resistance and good impact performance, and can be cut, bent, welded, etc. It can be connected to other structures through welding, plug welding, bolt connections, etc. It offers time-saving and convenience in maintenance scenarios and is widely used in industries such as metallurgy, coal, cement, power, glass, mining, building materials, and brick and tile. Compared to other materials, it offers high cost-effectiveness and has gained increasing favor from various industries and manufacturers.

Hardness, HRC

Wear-resistant layer thickness ≤4mm: HRC54-58;

Wear-resistant layer thickness >4mm: HRC56-62

Appearance Parameters

Flatness: 5mm/M

1. Excellent Wear Resistance The chemical composition of the alloy wear-resistant layer contains 4~5% carbon and up to 25~30% chromium. The microstructure shows Cr7C3 carbides with a volume fraction exceeding 50%. The macrohardness is HRC56~62, and the hardness of chromium carbide is HV1400~1800. Since the carbides are distributed perpendicular to the wear direction, the wear resistance is more than double that of cast alloys with the same composition and hardness. The wear resistance compared to several typical materials is as follows: (1) Compared to low-carbon steel: 20~25:1 (2) Compared to as-cast high-chromium cast iron: 1.5~2.5:1
2. Good Impact Resistance The base plate of the wear-resistant composite steel plate is made of tough materials such as low-carbon steel or low-alloy stainless steel, reflecting the advantages of bimetallic materials. The wear-resistant layer resists wear from the medium, while the base plate bears the load, resulting in good impact resistance. It can withstand impacts and wear in material handling systems, such as high-drop hoppers.
3. Good Heat Resistance The alloy wear-resistant layer is recommended for use at temperatures ≤600°C. If vanadium, molybdenum, and other alloys are added to the wear-resistant layer, it can withstand high-temperature wear up to ≤800°C. Recommended usage temperatures are as follows: Ordinary carbon steel base plate is recommended for use at temperatures not exceeding 380°C; low-alloy heat-resistant steel plate base (such as 15CrMo, 12Cr1MOV, etc.) is recommended for use at temperatures not exceeding 540°C; heat-resistant stainless steel base plate is recommended for use at temperatures not exceeding 800°C.
4. Good Corrosion Resistance The alloy layer of the wear-resistant composite steel plate contains a high percentage of metallic chromium, providing certain rust and corrosion resistance. It can prevent coal sticking in applications such as coal chutes and hoppers.
5. Complete Variety of Specifications Wear-resistant steel plates come in a full range of specifications and varieties, with a commercial series. The thickness of the wear-resistant alloy layer ranges from 3~20mm. The thickness of the composite steel plate can be as thin as 6mm, with no upper limit. Standard wear-resistant steel plates are available in sizes of 1200 or 3800×12000mm, and can also be custom-made according to user requirements. Wear-resistant steel plates are currently divided into three types: general-purpose, impact-resistant, and high-temperature resistant. Orders for high-temperature wear-resistant and impact-resistant composite steel plates must specify the type.
6. Convenient Processability Wear-resistant steel plates can be cut, bent or rolled, welded, and drilled, and can be processed into various components like ordinary steel plates. Cut wear-resistant steel plates can be welded together to form various engineering structures or parts.
7. Functions and Features Weldable, excellent wear resistance.