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The titanium steel composite plate produced by explosion method and thick plate rolling method is a thick plate, mainly used as a corrosion-resistant structural material. Chemical equipment such as high-purity phthalic acid equipment and condenser tube plates are used in power generation equipment.The titanium steel composite plate manufactured by continuous hot rolling is a thin plate mainly used for lining marine steel structures, and its application field is marine civil engineering.

In the production of titanium steel clad plate, the common quality problems are: clad plate defects and welding defect. The former mainly includes insufficient bonding rate, local surface cracks in the titanium and steel layers, etc; The latter mainly includes pores, cracks, incomplete welding, and slag inclusion. Prevention and control measures 1. Composite plate defects 1) Adhere to the incoming material re inspection system, and the bonding condition of the composite board should be inspected one by one. It is a transition joint, flange, etc. For composite plates made of titanium material that do not consider strength, continuous 100% ultrasonic testing is required within a range of 50mm around the perimeter, and 200mm spacing testing is required for other areas. Other, 100% inspection. 2) When the plasticity of the composite plate is poor, it needs to be re annealed to eliminate stress, improve its performance, and prevent defects in subsequent production. 3) When bending operations are required for pulling plates such as drums and stamping heads, when the temperature is low, the bent parts should be preheated by flame to prevent bubbles or cracks. 4) When planing and drilling pipe holes, the cutting and drilling operations should be carried out from the titanium layer to the steel layer as much as possible to prevent tearing or forming cracks on the composite plate. 2. Welding defect 1) Welding the titanium layer requires argon gas with a purity of not less than 99.99% as the protective gas. In addition, welding wires are not allowed to have cracks or interlayers. 2) Carefully clean and handle the welding area of the workpiece before welding. When the ambient temperature is below 5 ℃, flame preheating should be used to preheat the base steel surface. 3) For titanium steel clad plate equipment, the titanium weld processing process is stick processing, that is, remove the titanium layer within 15mm of the edge of the clad plate. First weld the steel weld, and then use 50mm wide titanium Flat noodles to completely cover the steel weld. At the same time, weld the titanium layer and protect it with argon. 4) For micro cracks on the surface of the composite plate, the defects must be cleaned before repair welding. For small cracks, direct repair welding can be used. 5) For non bonding found during the production and inspection process, if the area is large, the material must be replaced. If the area is small, remedial measures can be taken. The non bonding area should be reinforced with titanium rivets, and the number of rivets should be minimized.

The base material of stainless steel composite plate can use various ordinary carbon steel and special steel such as Q235B, Q345R, 20R, etc. The cladding material can use various grades of stainless steel such as 304, 316L, 1Cr13, and duplex stainless steel. The material and thickness can be freely combined to meet the needs of different users. Stainless steel composite plates not only have the corrosion resistance of stainless steel, but also have the good mechanical strength and processing performance of carbon steel, making them a new type of industrial product. Stainless steel composite plates have been widely used in industries such as petroleum, chemical, salt, water conservancy and power. Stainless steel composite plates, as a resource saving product, reduce the consumption of precious metals and significantly reduce engineering costs. The combination of low cost and high performance has good social benefits.

How is stainless steel composite plate produced? There are two main methods for industrial production of stainless steel composite plates, explosive bonding and hot rolling bonding. The production process of explosive composite plates is to overlap stainless steel plates on carbon steel substrates, and a certain distance is separated between the stainless steel plates and carbon steel substrates using a cushion. The stainless steel plate is paved with explosives, and the energy of the explosive explosion causes the stainless steel plate to impact the carbon steel substrate at high speed, generating high temperature and pressure, which enables solid-state welding of the interface between the two materials. Ideally, the shear strength per square millimetre of the interface can reach 400 MPa.

The hot rolled composite plate process is formed by rolling carbon steel substrates and stainless steel plates in a physically pure state under high vacuum conditions. During the rolling process, the two metals diffuse to achieve complete metallurgical bonding. Of course, in order to improve the wetting effect of the composite interface and enhance the bonding strength, a series of technical measures need to be taken in the physical and chemical treatment of the interface. The above two manufacturing methods for composite plates are in accordance with the national standard GB/T8165-2008. This standard is not equivalent to the Japanese JISG3601-1990 standard, and its main technical indicators are the same or higher than the Japanese standard.

1. Due to the fact that explosive bonding is cold worked, it can produce many types of metal composite plates, such as titanium, copper, aluminum, and so on, in addition to stainless steel composite plates. 2. Explosive bonding can produce stainless steel composite plates with a total thickness of several hundred millimeters, such as some large bases and tube plates. However, it is not suitable for producing thinner composite steel plates with a total thickness of less than 10 mm. 3. Explosive compounding utilizes the energy of explosives to produce, which can cause vibration, noise, and smoke pollution to the environment. However, the equipment investment is low, and there are hundreds of explosion production factories in China. Due to the limitations of weather and other process conditions, the production efficiency of explosive bonding is relatively low.