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A laminate of two dissimilar metals, with different coefficients of thermal expansion, bonded together.



a metallic material consisting of two layers of heterogeneous metals or alloys (such as steel and aluminum, steel and niobium, aluminum and titanium, titanium and molybdenum). Bimetals are used to increase the strength or heat resistance of structures, to reduce their bulk while economizing on expensive or scarce materials, and to obtain materials with special characteristics when required. For example, in electrical and radio engineering, bimetals are widely used because the density of an alternating current is greater at the periphery of the conductor than at its core, and therefore it is sometimes expedient to coat the surface of a conductor made of cheaper material (steel or aluminum) with good conductive material (copper or silver). In instrument-making, the differences in temperature coefficients of expansion of the different metals in bimetallic plates are utilized. In machine-building, certain parts of machinery, such as bush bearings, are made of bimetals.

Bimetals are made primarily by simultaneous rolling or pressing of two slabs of different metals or alloys. The casting of a fusible metal onto a refractory one and the immersion of a refractory metal in a molten fusible one are also common. In electroplating, the layer of the more precious metal is applied electrolytically. The expensive and scarce harder alloys are applied to steel by electric heating (in the production of cutting tools, dies, and the like).

References in periodicals archive ?
Unlike the prior art (Ramaiah and others, 2004) that requires a starting probe and bi-metal switch to operate on probestart systems, the new technologically advanced energy saving lamp eliminates the need of starting probe within the arc tube and bi-metal switch inside the lamp while achieving reliably starting on both probe-start and pulse-start systems.
Was presented a new manufacturing and reconditioning concept for tools used at processing through plastic deformation, concept that consist of realization of bi-metal type modulated elements, interchangeable, cladded through welding in the areas (surfaces) subjected to wear with weld beads, using specially elaborated filler materials;
IC Enduro Bi-Metal Bandsaw Blades are engineered with a variable tooth set to maximize cutting performance while minimizing kerf loss.
With bi-metal cans having increased AMG's presence in the aluminum recycling industry, the company also ventured further into aluminum with its purchase of Shardal Castings Ltd.
British style embroidered badges were authorised but most ranks preferred to wear bi-metal similar to Australian pattern.
1 tons of newspapers, corrugated cardboard, PET and HDPE plastics and aluminum and bi-metal food cans in their own neighborhoods.
A new bi-metal bonding process for mold components, powder-metallurgy mold steels, and novel mold-filling analysis capabilities using the power of graphics supercomputing, were among the developments presented at last month's SPE Moldmaking and Mold Design RETEC in Rosemont, Ill.
The company offers technical literature on the care and feeding of band saw blades which includes information on blade overtensioning, guides, bi-metal blades, fatigue ratios and tips on how to extend blade life.
The Energy Plus uses a new digital thermostat that intelligently regulates wattage and fan speed to keep room temperatures consistent and comfortable, eliminating the large temperature swings, high energy consumption, and noise produced by basic on/off, bi-metal thermostats traditionally used with in-wall heaters.
Tenders are invited for Bi-Metal Endless Band Saw Blade Grade M42 Cutting Brand Size 4100 Mm X 27 Mm X 0.
Erik Meijer, President of Bourns Electronics, this acquisition provides Bourns with an attractive offering of protectors combining bi-metal switches and thermistors.
Never shoot green-tip or bi-metal bullets at a steel target of any kind because they will dimple and deform the target, radically increasing the likelihood of a ricochet.