SS304 Stainless Steel Clad Steel Plate

As a surface engineering technology, SS304 Stainless Steel Clad Steel Plate as a class of surface engineering materials have many characteristics, including the following advantages.

(1) Explosive welding process has low requirements for hardware facilities. Only metal raw materials, explosive welding explosives, and suitable sites are needed for explosive welding production of composite plates, without very precise equipment and subsequent maintenance.

(2) The explosive welding process is not complicated, and relevant operators can take up their posts only after simple training after firmly mastering the safety regulations

(3) The selection of material parameters is not strict, and it can be basically selected arbitrarily within the allowable range of explosive welding technology.

(4) The production scale of explosive welding clad plates can be very large, and the utilization rate of such factors as materials and time is very high.

(5) The bonding strength of explosive welded composite materials is very high, and even if it is subjected to various forms of post-processing, there will be no cracking or delamination that will affect the quality of composite plates

(6) Explosive welding can be combined with traditional processing technology. After processing explosive clad plates, the shape of plates can be changed without affecting the quality of clad plates to adapt to practical industrial applications

(7) After explosive welding, both raw materials and composite plates will harden, which will help to improve the corrosion resistance and wear resistance of materials to a certain extent, thus improving the strength of materials.

(8) The production of metal-clad plates by explosive welding can not only be a multi-layer composite but also not limited to a certain shape and style. In addition to producing flat composite plates, it can also produce composite pipes, composite bars, etc.

With the development of explosive welding technology, the SS304 Stainless Steel Clad Steel Plate

(9) produced are no longer limited to the composite of metal materials. By controlling the process parameters, some nonmetals, such as ceramics, can also form composite materials with metals by explosive welding, greatly expanding the application scope of the process.

 

There are many factors that affect the quality of explosive welding. In the traditional explosive welding process, the type of explosive, the way of explosive distribution, the way of initiation, the material properties and dimensions of clad plate and base plate, the distance between clad plate and base plate, and the type of foundation can all affect the bonding quality of clad plate. For the research of explosive welding process, predecessors have done a lot of work. With the increasing demand of modern industry for explosive welding composite plates, the research scope of explosive welding process is also increasingly common. The initiation methods can be roughly divided into the following four types: center point initiation, peach shaped edge point initiation, and "T" type linear wave initiation. Figure 14 shows four different initiation methods, and it can be seen from the figure that the wave fronts obtained by different initiation methods are also different point initiation peach shaped edge point initiation T "type initiation linear wave initiation Figure 1.4 Different initiation methods for explosive welding.

Fig. 1.4 Different Initiation Methods of Explosive Welding

(1) Center point initiation: This method has the advantage of convenient operation. There can be a relatively large gravity deflection interface waveform in the middle of the cladding plate, which can be symmetrically and uniformly distributed on the interface. However, the disadvantage of this method is very obvious: because of the initiation at the central point, there is a vertical collision zone with zero collision angle near the central initiation point, where there is no generation of interface waves and no bonding occurs. The size of the wave free zone is related to such factors as the thickness of the cladding plate, the mass of the explosive, the mass ratio R of the cladding plate, and the detonation velocity of the explosive. The larger the thickness of the cladding plate, the larger the wave free zone. The self acceleration process of low detonation velocity explosive from detonator initiation to stable detonation is long, so the range of wave free zone is large. For parts with holes in the middle, such as flanges, it is very suitable to use the center point detonation method

Peach shaped edge point initiation: this method is to lead the initiation point out of the cladding plate, so as to avoid the non combination caused by the vertical collision between the cladding plate and the substrate in the central area in the central initiation method. This method is convenient and suitable for explosive welding of circular clad plates. Figure 1.5 shows the finished composite plate produced by peach shaped edge point initiation Figure 1.5 The finished composite plate produced by peach shaped edge point initiation.

Figure 1.5 Finished composite plate produced by peach shaped edge point blasting

(3) "T" type initiation: this method is to add a strip of high detonation velocity explosive or detonating cord to the initiation end to improve the detonation wave front and reduce the curvature of the wavelet front. For rectangular cladding plates with small width, this method is suitable for explosive welding.

Linear wave initiation: this method can make all points at the initiation end detonate at the same time, which not only improves the welding quality of the initiation end, but also provides better conditions for the movement of the clad plate and collision with the substrate. For rectangular composite plates with large area, the explosive welding with this initiation method can obtain better results. A special initiation device is required to generate linear waves, that is, the linear wave generator as shown in Figure 1.6. It can be made by drilling equilateral triangular explosives (as shown in Figure 16 (a)), or by combining two explosives with different detonation velocities (as shown in Figure 1.6 (b))

Figure 1.5 Finished composite plate produced by peach shaped edge point blasting.

Fig. 1.6 Linear wave generator