Wear-resistant composite steel significant features
1, high wear resistance alloy layer chemical composition of carbon content of 4 to 5%, chromium content as high as 25 to 30%, the microstructure of the Cr7C3 carbide volume fraction of more than 50%, macroscopic hardness HRC56 ~ 62 , The hardness of chromium carbide HV1400 ~ 1800, higher than the quartz sand hardness of HV800 ~ 1200. Due to the perpendicular distribution of carbides in the direction of wear, the wear resistance can be more than doubled even with cast alloys of the same composition and hardness. Compared with the wear resistance of several typical materials are as follows:
(1) with mild steel; 20 ~ 25:
(2) and high manganese steel; 5 to 10:
(3) and tool steel; 5 ~ 10:
(4) with cast high chromium cast iron; 1.5 ~ 2.5:
2, good impact resistance: the bottom of wear-resistant composite steel for low carbon steel or low alloy. Stainless steel and other ductile materials, reflecting the superiority of bimetal, wear-resistant layer of wear-resistant media wear and tear, the substrate to withstand the load of the medium, so have good impact resistance. Can withstand high material handling system hopper hopper impact and wear and tear.
3, better heat resistance: wear-resistant layer is recommended to use under ≤ 600 ℃ operating conditions, if the alloy layer by adding vanadium, molybdenum and other alloys, can withstand ≤ 800 ℃ high temperature wear and tear. The recommended temperature is as follows: ordinary carbon steel substrate recommended not higher than 380 ℃ working conditions; low alloy heat-resistant steel (15CrMo, 12Cr1MoV, etc.) substrate recommended not higher than 540 ℃ conditions; heat-resistant stainless steel substrate is recommended not higher than 800 ℃ working conditions.
4, good corrosion resistance Wear-resistant composite steel alloy layer contains a high percentage of metal chromium, it has a certain anti-rust and corrosion resistance. For coal billets and funnels and other occasions can be done to prevent sticky coal.
5, strong wear-resistant composite steel specifications full, variety, has become a commodity series. Wear-resistant alloy layer thickness of 3 ~ 20mm. The thickness of composite steel thinnest is 6mm, the thickness is not limited. Standard wear-resistant composite steel plate can provide 1200 or 1450 × 2000mm, but also according to user needs, according to the size of custom drawings processing. Wear-resistant composite steel is divided into ordinary type, impact-resistant and high-temperature-type three, ordering high-temperature wear-resistant and impact-resistant composite steel to be described.
6, easy processing performance Wear-resistant composite steel can be cut, leveling, drilling, bending and curling, which can be made of flat, arc, cone, cylinder. Cut the composite board can be welded into a variety of engineering structures or components. Composite board can also be heated with a touch of the mold into a complex shape. Wear-resistant composite steel plate can be fixed with bolts or welding equipment, easy replacement and maintenance.
7, high price performance than wear-resistant composite steel although the manufacturing costs increase, but several times the service life, making maintenance costs and downtime loss greatly reduced, the price performance than ordinary materials about 2 to 4 times higher. Material handling capacity, the more serious wear and tear of equipment factories and mines, the use of wear-resistant composite steel more obvious economic effect.