WCA September 2010

Furnaces and heat treatments

RI type inductive annealers Maschinenfabrik Niehoff and its subsidiary company NBM have completely revised and optimised the inductive-conductive annealers of the RI series. The

RI annealers are built in four different sizes and can be combined with rolling lines and drawing lines for the in-line heat treatment of round, flat and profiled wires with a diameter from 0.15mm to 5mm. Designed for an annealing power of 10kW up to 250kW, the RI annealers can now be applied for annealing temperatures of up to 1,000°C and are particularly suitable for wires made of metals with low electric conductivity, such as copper alloys, nickel and nickel alloys, precious metals and their alloys, composite wires and special material wires.

The revised design of the annealers includes the most recent energy-saving drives and energetically optimised components, corres- ponds to the current safety regulations of the machinery directive RL 2006/42/EG and features a completely new and functionally optimised machine design. The RI annealers work on the principle of an excitation voltage transformer. The induced electrical voltage generates an electric current which heats the wire and leads to a fine and homogeneous structure with good processing properties while ensuring a high wire surface quality. The contactless energy transfer principle ensures a high energy efficiency (80 to 90%).

RI 250 type inductive-conductive ❍ ❍ annealer in the new design

Maschinenfabrik Niehoff GmbH & Co KG – Germany Fax : +49 9122 977155 Email : info@niehoff.de Website : www.niehoff.de

Wire and strand annealing furnaces CM’s annealing furnaces are designed and manufactured for years of trouble-free service in the processing of wire, rod, strand and strip products. They are said to be ideal for copper, copper alloy, nickel, nickel chrome, titanium, stainless steel and refractory metals. Temperature ranges are available from 1,000°C (1,850°F) to 1,750°C (3,200°F). In addition to standard sizes, CM will modify existing designs to meet the customer’s particular process requirements. All furnaces are completely assembled, factory pre-tested and ready for immediate installation. All CM strand annealers are manufactured from heavy gauge steel with state-of-the-art electronics and an energy-saving combination of fibre and brick insulation. A staggered tube array allows a greater number of tubes in a more compact, energy efficient cavity, and minimises the temperature drop across the cavity to provide greater temperature uniformity and improved product quality. The processing tubes, available in a choice of alloys, are supported by silicon carbide plates to minimise sagging and horizontal drift.

All CM furnaces are available with water cooled tanks, fabricated from stainless steel and incorporating stainless tubes. Optional re-circulating systems with chillers are available. Gas manifolds permit the operator to individually control the flow of atmosphere into each tube. All units utilising combustible atmospheres include CM Furnaces’ own hydrogen/nitrogen safety system to prevent the unsafe operation of the equipment in the event of failure. SCR power controllers are utilised on each control zone and separate variable

Strand annealer from CM ❍ ❍ Furnaces

set point over temperature instrumentation is provided. Thermocouple alloys are selected depending on process and operating temperatures. A full array of ammeters and volt meters are supplied, including all controls, switches, relays, power transformers and other electrical components. All instrumentation is ready for immediate operation.

CM Furnaces Inc – USA Email : info@cmfurnaces.com

Fax : +1 973 338 1625

Website : www.cmfurnaces.com

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Wire & Cable ASIA – September/October 2010