所属分类：行业资讯 发布时间：2021-04-16 11:03:13 来源：http://www.lcnmb500.com 浏览量：
Steel plate is a kind of flat steel poured with molten steel and pressed after cooling. It is flat and rectangular, and can be directly rolled or cut from wide steel strip. According to the thickness of steel plate, thin steel plate < 4mm, medium thick steel plate 4 ~ 60mm, extra thick steel plate 60 ~ 115mm, steel plate rolling, hot rolling and cold rolling. The width of thin plate is 500-1500 mm; the width of thick plate is 600-3000 mm.
According to the type of steel, there are ordinary steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron sheet; according to the purpose, there are oil barrel plate, enamel plate, bulletproof plate, etc.; according to the surface coating, there are galvanized plate, tin plate, lead plate, plastic composite plate, etc.
Wear resistant steel plate: wear resistant steel plate refers to the special plate products specially used for large area wear conditions. The commonly used wear-resistant steel plate is made of a certain thickness of alloy wear-resistant layer with high hardness and excellent wear resistance on the surface of low carbon steel or low alloy steel with good toughness and plasticity by surfacing. In addition, there are cast wear-resistant steel plate and alloy quenched wear-resistant steel plate.
Structural characteristics of wear-resistant steel plate: the wear-resistant steel plate is composed of low-carbon steel plate and alloy wear-resistant layer, and the alloy wear-resistant layer is generally 1 / 3 ~ 1 / 2 of the total thickness. The matrix provides the strength, toughness, plasticity and other comprehensive properties to resist external forces, and the alloy wear-resistant layer provides the wear resistance to meet the requirements of specified working conditions.
The alloy wear-resistant layer of wear-resistant steel plate is metallurgically bonded with the substrate. Through special equipment and automatic welding process, the high hardness self-protection alloy welding wire is evenly welded on the base plate, and the number of composite layers is one to two or even more. In the process of composite, due to the different alloy shrinkage ratio, uniform transverse cracks appear, which is a significant feature of wear-resistant steel plate.
The wear-resistant layer 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 distributed in fibrous form, and the fiber direction is perpendicular to the surface. The micro hardness of carbide can reach hv1700-2000 and the surface hardness can reach HRC58-62. The alloy carbide has strong stability at high temperature, high hardness and good oxidation resistance. It can be used normally within 500 ℃.
The wear-resistant layer is mainly composed of narrow channel (2.5-3.5mm), wide channel (8-12mm), curve (s, w), etc.; it is mainly composed of chromium alloy, and other alloy components such as manganese, molybdenum, niobium, nickel, boron, etc. are added at the same time. The carbide in the metallographic structure is fibrous, and the fiber direction is perpendicular to the surface. The content of carbide is 40-60%, the microhardness can reach hv1700, and the surface hardness can reach HRC58-62.