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The application of stainless steel composite panels in engineering design

2016-07-05

The stainless steel clad plate is a stainless steel precision plate made of a combination of a carbon steel base layer and a stainless steel clad layer. Its main feature is the solid metallurgical combination of carbon steel and stainless steel, which can be processed in various processes such as hot pressing, cold bending, cutting and welding, and has good process performance. For the base material of the stainless steel clad plate, various ordinary carbon steels and special steels such as Q235B, Q245R, Q345B, and Q345R can be used. Various grades of stainless steel such as 304, 316L, 321 and duplex stainless steel can be used for the cladding material. Material and thickness can be combined freely to meet the needs of different users. Stainless steel clad plates have been widely used in petroleum, chemical, salt, water and power industries. As a resource-saving product, the stainless steel clad plate reduces the consumption of precious metals and greatly reduces the project cost. Achieve the perfect combination of low cost and high performance, with good social benefits.

How is the stainless steel composite panel produced? There are two main methods for industrial production of stainless steel clad plates, explosive composite and hot rolling composite. The production process of the explosive composite plate is to superimpose the stainless steel plate on the carbon steel substrate, and the stainless steel plate and the carbon steel substrate are spaced apart by a certain distance. The energy of stainless steel precision sheet explosion causes the stainless steel plate to impact the carbon steel substrate at high speed, resulting in high temperature and high pressure, so that the interface between the two materials can be solid phase welded. In the ideal state, the shear strength per square millimeter of the interface can reach 400 MPa. The hot-rolled composite sheet process is formed by rolling a carbon steel substrate and a stainless steel plate in a physically pure state under high vacuum conditions. The two metal diffusions during the rolling process achieve a complete metallurgical bond. Of course, in order to improve the wetting effect of the composite interface and improve the bonding strength, a series of technical measures are taken in the physical and chemical treatment of the interface. Both of the above composite plate manufacturing methods implement 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.

So what are the process characteristics of explosive composite and hot rolled composite panels? Let me talk about the characteristics of explosive composite:


First, because the explosive composite is cold-worked, it can produce a variety of metal composite panels, such as titanium, copper, aluminum, etc., in addition to stainless steel composite panels.


Second, the explosive composite can produce stainless steel composite plates with a total thickness of stainless steel composite plates up to several hundred millimeters thick, such as some large bases and tube sheets. However, it is not suitable for the production of thin composite steel sheets with a total thickness of less than 10 mm. The three-explosive composite utilizes the energy production of stainless steel precision plates, which causes vibration, noise and smoke pollution to the environment. However, equipment investment is small, and there are hundreds of domestic explosion production plants. Explosive composite production is less efficient due to weather and other process conditions. In addition, the hot rolling composite process features: First, the use of large-scale plate mill and hot strip mill production, so high production efficiency, fast delivery. The product has a large format and a free combination of thickness. Stainless steel coating thickness of 0.5mm or more can be produced. But the investment is large, so there are fewer manufacturers. Second, due to the limitation of the compression ratio of the rolled steel, the hot-rolled production cannot produce composite steel plates with a thickness of more than 50 mm, and it is not convenient to produce various special-shaped composite plates of small batches and round shapes. Advantages of hot-rolled composite sheets 6, 8, 10 mm thin gauge composite panels. Under hot rolling conditions, it can produce composite coils, reduce production costs and meet more user needs.


3. Under the current technical conditions, the hot rolling process cannot directly produce non-ferrous metal composite plates such as titanium, copper and aluminum. In summary, the two different production processes have their own characteristics, and they exist and develop to meet the diverse needs of different users. The blast rolling method is a combination of the foregoing two processes and will not be described again.

The stainless steel clad plate has the characteristics of various carbon steel and stainless steel, and is welcomed by users with its excellent performance and price ratio, and has broad market prospects. But what's interesting is that since the 1950s, after more than half a century of development, many people still don't know about it. More people have not used it. It should be said that the market for stainless steel clad plates is far from maturing and still in the process of development. The exploration and efforts of science and technology workers to build a resource-saving society will never stop.


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Kunshan Minglida Stainless Steel Co., Ltd.

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Tel: 0512-55230411 turn 103

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