Clad metal material refers to a composite material formed by metallurgical bonding at the interface using composite technology or metals with different chemical and mechanical properties, which greatly improves the thermal expansion, strength, fracture toughness and impact toughness of a single metal material. , wear resistance, electrical properties, magnetic properties and many other properties, so it is widely used in products widely used in petroleum, chemical industry, shipbuilding, metallurgy, mining, machinery manufacturing, electric power, water conservancy, transportation, environmental protection, pressure vessel manufacturing, food , brewing, pharmaceutical and other industrial fields.