The ss clad plate is a composite plate steel plate formed by combining a carbon steel base layer and a stainless steel cladding layer. Its main feature is that carbon steel and stainless steel form a strong metallurgical combination, which can be processed by hot pressing, cold bending, cutting, welding, etc., and has good process performance. The base material of the stainless steel clad plate can use various ordinary carbon steels and special steels such as Q235B, Q245R, Q345B, Q345R, and so on.
Various grades of stainless steel such as 304, 316L, 321, and duplex stainless steel can be used as the coating material. The material and thickness can be freely combined to meet the needs of different users. Stainless steel composite plates have been widely used in petroleum, chemical, salt, water conservancy, and electric power industries. As a resource-saving product, stainless steel clad plate reduces the consumption of precious metals and greatly reduces the project cost. To achieve the perfect combination of low cost and high performance, there are good social benefits.
How is the Ss Clad Plate Produced?
How is stainless steel clad plate produced? There are two main methods for the industrial production of stainless steel clad plates, explosive clad and hot rolled clad. The production process of the explosive clad plate is to overlap the stainless steel plate on the carbon steel substrate, and the stainless steel plate and the carbon steel substrate are separated by a certain distance with a cushion.
Explosives are spread flat on the stainless steel plate, and the energy of the explosive explosion makes the stainless steel plate hit the carbon steel substrate at high speed, generating high temperature and high pressure so that the interface of the two materials can be solid-phase welded. Ideally, the shear strength per square millimeter of the interface can reach 400 MPa. The hot-rolled composite plate process is made by rolling the carbon steel base plate and the stainless steel plate in a physically pure state under high vacuum conditions. In the rolling process, the two metals diffuse to achieve complete metallurgical bonding.
Of course, to improve the wetting effect of the composite interface and increase the bonding strength, a series of technical measures must be taken in the physical and chemical treatment of the interface. The above two composite board manufacturing methods are by the GB/T-8165-1977 national standard. This standard is not equivalent to the Japanese JISG3601-1990 standard, and the main technical indicators are the same or higher than the Japanese standard.
What are the Technical Characteristics of the Explosive Clad Plate and Hot-Rolled Clad Plate?
So what are the technical characteristics of explosive clad and hot-rolled clad plates? Let me talk about the characteristics of explosive compounding:
1. Because explosive compounding is cold processed, it can produce many kinds of metal compound plates in addition to stainless steel clad plates, such as titanium, copper, aluminum, and so on.
2. Explosive compounding can produce stainless steel compound plates with a total thickness of several hundred millimeters, such as some large bases and tube plates. However, it is not suitable for the production of thinner-clad steel plates with a total thickness of less than 10mm. The three-explosion compound uses the energy production of explosives, which will cause vibration, noise, and smoke pollution to the environment.
However, the equipment investment is small, and there are hundreds of domestic explosive production plants. Due to the limitation of weather and other process conditions, the production efficiency of the explosive compounds is low.
Let’s talk about the Characteristics of the Hot-Rolling Composite Process:
1. It uses a large-scale medium plate rolling mill and a hot tandem mill for production, so the production efficiency is high and the supply speed is fast. The product format is large and the thickness can be freely combined. Stainless steel cladding thickness over 0.5mm can be produced. But the investment is large, so there are fewer manufacturers.
2. Due to the limitation of the rolling steel compression ratio, hot rolling production cannot produce composite steel plates with a thickness of more than 50mm, and it is not convenient to produce various small batches, circular composite plates, and other special-shaped composite plates. Advantages of hot-rolled composite panels 6, 8, and 10mm thin-gauge composite panels. Under hot continuous rolling conditions, it can produce composite coils, reduce production costs, and meet more user needs.
3. Under current technical conditions, the hot rolling process cannot directly produce titanium, copper, aluminum, and other non-ferrous metal composite plates.
In Conclusion
In summary, the two very different production processes have their characteristics and exist and develop at the same time to meet the diverse needs of different users. The explosive rolling method is a combination of the foregoing two processes, and will not be repeated.
Stainless steel clad plates have the characteristics of various carbon steels and stainless steel and are welcomed by users with their excellent performance-to-price ratio and have broad market prospects. But what’s interesting is that since the 1950s, after more than half a century of ups and downs in the development process, many people still don’t know it. More people have not used it. It should be said that the market for stainless steel composite panels is far from entering a mature period and is still in the development process. The exploration and efforts of scientific and technological workers to build a resource-saving society will never stop.