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Academy of Mining Sciences of Ukraine
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Bimetallic (hardfacing, clad,overlaid) wear resistant plate (hardfaced plate,clad plate,overlaid plate) is a double-layer metal material composed of two different metals - steel and alloys which are firmly connected to each other and it is a unified whole.

The layers have different functions and in accordance with these terms they are called – thebasicand deposited layer. Basic layer assumes mechanical loads and deposited layer has high wear resistance and has protective function.

Bimetallic plates SWIP (hardfaced plate, clad plate,overlaid plate)  are plates, the basis of which can be either a plain low carbon steel or heat resistant steel. Special wear resistant coating is applied on the basic layer with the help of robotic powder cladding.

Overlay of bimetallic plates SWIP may contain carbides:  Fе3С; Мn3С; Сr7С3; W2С; WС; VС; ТiС; В4С, Мо2С, and also carboborides, nitrides of iron and alloying elements. In the process of surfacing we use materials both of domestic and foreign manufactures. This allows to choose the desired composition of deposited metal, based on the terms of the equipment’s work, nature and intensity of wear as well as individual customer’s wishes.

The hardness of the deposited layer of bimetal after Rockwell is 58-62 HRC, the hardness of carbides – up to 1400 HRV.Characteristics of the layer may have different parameters of hardness and wear resistance, depending on the customers specification.

The maximum temperature at which you can use bimetallic lining is up to 600 degrees ?. If necessary, technical specialists of  Steel Work LLC can develop technology to protect equipment operating under higher temperature regimes.

A characteristic feature of bimetal products is their high strength. Steel Work LLC uses an exclusive patented technology of bimetallic wear resistant plates SWIP manufacture, which provides high hardness of the material. Bimetallic plate is an ideal material for the manufacture and repair of working parts and components subjected to intensive wear.

The undeniable advantage of the bimetal is ability to produce spare parts almost of any shape according to customer’s drawings, including rolling and bending. Wear resistant plates SWIP can be used in a wide range of industrial equipment. Assembly, connection and fastening of bimetallic products on the protected surface is made either by welding or using bolts, pins, etc.

Application of bimetallic wear resistant plates has a number of advantages in comparison with simple metal. In some cases it’s possible to create a set of operational properties unattainable in simple metals, steel or alloys.

Application of bimetallic wear resistant plates SWIP is efficient for the following reasons:

  • Ability to protect the equipment from any type of wear;
  • A significant extension of equipment service life by improving the durability of the protected surface;
  • Reducing the weight of the lining of equipment up to 50% and consequently increasing of productivity of equipment;
  • Reducing operating costs for maintenance of equipment and consequently reducing production costs;
  • Simplicity of installation of bimetallic plates.

One of the main reasons of improved wear resistant bimetallic plates produced by «Steel Work» Ltd is completely automatic process of surfacing, which allows controlling all its parameters: value of welding current, arc voltage, electrode flight, welding speed stability, temperature of deposited layer, and the speed of transverse movement of the electrodes.

Steel Work  LTD takes responsibility for trouble-free operation of repaired equipment during the warranty period.

Explosive Welding (EW)

Steel Work LLC collaborates with The E.O. Paton Electric Welding Institute in the field of explosive welding (EW) fabricating and distribution.

Explosion welding (EW) is a breakthrough technological process. It is a solid state (solid-phase) one where welding is accomplished by component acceleration at extremely high velocity through the use of chemical explosives.

Bimetal is widely utilized for production of reactors, parts of heat treatment equipment, different vessels  and other products for oil, chemical  and other industries.

The process of EW is most commonly utilized to clad carbon steel plate (carrying out structure bearer functions) with a thin layer of corrosion resistant material (e.g., stainless steel, nickel alloy, titanium, zirconium, etc.).

The Advantages of EW bimetal fabrication are:

  • explosion welding can produce a bond between two metals that cannot be welded by conventional means;
  • keeping mechanical properties for the steels and alloys unchanged (tensile strength of the bimetal plate is always firmer of the less solid metal used in the EW (Explosive Welding) compound);
  • gaining the most possibly tight fusion between metals;
  • absence of  weak areas causing by other methods of metal welding;
  • time and cost effective process;
  • volume flexible manufacturing.