Wear-resistant steel plate

- Jun 26, 2019-

Wear Resistant Steel Plate is a special sheet product designed for use under large-area wear conditions. At present, the commonly used wear-resistant steel plate is a plate made of a common wear-resistant layer with high hardness and excellent wear resistance by a surfacing method on the surface of ordinary low carbon steel or low alloy steel with good toughness and plasticity. product.

Wear-resistant steel, which has weather-resistant steel plate, seamless steel pipe, 304 stainless steel pipe, 9848 seamless steel pipe, 42crmo seamless steel pipe


Structural features

The wear-resistant steel plate is composed of a low-carbon steel plate and an alloy wear-resistant layer, and the wear-resistant layer of the alloy is generally 1/3 to 1/2 of the total thickness. When working, the base body provides comprehensive properties such as strength, toughness and plasticity against external forces, and the wear-resistant layer of the alloy provides wear resistance that meets the requirements of the specified working conditions.

The wear-resistant steel alloy wear layer and the substrate are metallurgically bonded. The high-hardness self-protecting alloy welding wire is uniformly welded on the substrate by special equipment, and the composite layer is layered to two layers or even multiple layers. During the compounding process, uniform transverse cracks occur due to different alloy shrinkage ratios. It is a remarkable feature of wear-resistant steel.

The wear-resistant layer of the alloy is mainly composed of chromium alloy, and other alloy components such as manganese, molybdenum, niobium and nickel are added. The carbides in the metallographic structure are fibrously distributed, and the fiber direction is perpendicular to the surface. The microhardness of carbide can reach above HV1700-2000, and the surface hardness can reach HRC58-62. The alloy carbide has strong stability at high temperature, maintains high hardness, and also has good oxidation resistance, and is completely used normally within 500 °C.

The wear-resistant layer has the following forms: narrow channel (2.5-3.5mm), wide channel (8-12mm), curve (S, W), etc.; mainly based on chromium alloy, and also added manganese, molybdenum, niobium, nickel, boron When other alloy components are present, the carbides in the metallographic structure are fibrously distributed, and the fiber direction is perpendicular to the surface. The carbide content is 40-60%, the microhardness can reach above HV1700, and the surface hardness can reach HRC58-62.

Wear-resistant steel plates are mainly divided into general-purpose, impact-resistant and high-temperature resistant types; the total thickness of wear-resistant steel plates can reach 5.5 (2.5+3) mm, and the thickest can reach 30 (15+15) mm; wear-resistant steel plates It can roll the wear-resistant pipe with the smallest diameter of DN200, and can be processed into wear-resistant elbow, wear-resistant tee and wear-resistant reducer.


Performance description

The wear resistance of the excellent wear-resistant alloy wear layer has a carbon content of 4 to 5%, a chromium content of 25 to 30%, and a volume fraction of Cr7C3 carbide in the metallographic structure of 50% or more, and a macro hardness of HRC56~ 62, the hardness of chromium carbide is HV1400~1800. Since the carbide is vertically distributed in the wear direction, the wear resistance is more than doubled even when compared with the cast alloy of the same composition and hardness. The wear resistance of several typical materials is as follows: (1) with low carbon steel; 20~25:1 (2) and as-cast high-chromium cast iron; 1.5~2.5:1

The substrate of a good impact-resistant wear-resistant composite steel plate is low carbon steel or low alloy. The toughness material such as stainless steel reflects the superiority of the bimetal. The wear layer resists the wear of the wear medium, and the substrate bears the load of the medium, so it has good impact resistance. Can withstand the impact and wear of high drop hoppers in material handling systems.

A good heat-resistant alloy wear layer is recommended for use under ≤600 °C. If alloys such as vanadium and molybdenum are added to the wear-resistant layer of the alloy, it can withstand high temperature wear of ≤800 °C. The recommended temperature is as follows: ordinary carbon steel substrate is recommended not to be used above 380 °C; low alloy heat-resistant steel plate (15CrMo, 12Cr1MOV, etc.) substrate is recommended not to be used above 540 °C; heat-resistant stainless steel substrate is recommended not higher than Use at 800 °C.

The alloy layer of a good corrosion-resistant and wear-resistant composite steel sheet contains a high percentage of metallic chromium, so it has certain rust and corrosion resistance. It can be used to prevent coal sticking when used in coal mining tanks and funnels.

The specifications and specifications of wear-resistant steel plate are all in full, and there are many varieties. The thickness of the wear resistant alloy layer is 3 to 20 mm. The thickness of the composite steel plate is as thin as 6 mm, and the thickness is not limited. The standard wear-resistant steel plate can be supplied in 1200 or 3800×12000mm, and can also be customized according to the user's requirements. Wear-resistant steel plates are now divided into three types: ordinary type, impact-resistant type and high-temperature type. It is necessary to order high-temperature wear-resistant and impact-resistant composite steel sheets.

Convenient Machinability The wear-resistant steel plate can be cut, bent or crimped, welded and perforated, and it can be processed into various parts that can be processed by ordinary steel sheets. The cut wear-resistant steel plate can be welded into various engineering structural parts or parts.

The function and characteristics can be welded and the wear resistance is good.

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