DIV Deutscher Industrieverlag GmbH / Vulkan-Verlag GmbH
https://www.di-verlag.de/de/Zeitschriften/HEAT-PROCESSING/2017/04

Zeitschrift heat processing - Ausgabe 04/2017

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Beschreibung

"HEAT PROCESSING" is the international magazine for the entire field of industrial

furnaces, heat treatment processes, the efficient use of energy in thermoprocessing systems,

as well as being the international forum for interchange of knowledge and experience

between heat-processing industry suppliers and users.


heat processing - Ausgabe 04 2017

heat processing - Ausgabe 04 2017


Furnace technology for an integrated steel plant from a single source
FACHBEITRAG

Furnace technology for an integrated steel plant from a single source

Autoren: Christian Sprung / Caesar Sasse

All the furnace technology for the new steel complex built by Big River Steel in the U.S.A. was supplied by SMS group. This means all know-how for all heating and cooling processes along the entire process chain comes from a single source, ensuring maximum material quality. All furnaces have meanwhile been commissioned and are operating successfully.

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Increasing energy efficiency of industrial furnaces by usage of high temperature materials

Increasing energy efficiency of industrial furnaces by usage of high temperature materials

Autoren: Sylvia Otto / Wolfgang Adler / Bernhart Stranzinger / Roland Weiß / Arthur Lynen / Helmut Koch

Modern high temperature materials provide a demand reduction of energy and fuel for industrial furnaces. Exemplary three components will be described which can be produced from the materials CFC (for reducing atmosphere) and SiSiC (for oxidizing atmosphere). Fans out of those materials increase the convective heat transmission against steel components as the temperature rises, resulting in a reduction of times for heating and cooling. Fixture systems of those materials are more stable in shape and lead to lower reservoir losses during batch processes. Recuperators reach higher operation temperatures with these new materials.

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The day after tomorrow – the future of induction heating

The day after tomorrow – the future of induction heating

Autor: Valery Rudnev

Today’s metal working and heat treating shops must quickly adjust to a rapidly changing business environment, maximizing process flexibility and energy efficiency, yet still satisfy continuously increasing demands for higher-quality products. This article addresses these and other challenges faced by modern industry when applying induction systems for heating and heat treating. Several recently developed innovative processes and apparatus are reviewed and expectations for future technological developments are provided. This article is based on a keynote lecture presented at XVIII International UIE-Congress “Electrotechnologies for Material Processing” in Hannover, Germany, on June 6–9, 2017.

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Optimized quality control in induction hardening

Optimized quality control in induction hardening

Autoren: Michael Dawidowicz / Stefan Dappen

Induction hardening is well known for its good reproducibility. Nevertheless, the quality can also be influenced by several disturbances. In addition to factors like geometry, chemistry and the heat treatment history of the workpiece, the heat treatment parameters during heating and quenching have a major impact. We will show how the inductors and the heating process must be monitored in order to ensure reproducible heating sequences and which factors influence the heating quality. Cooling and quenching media, whose properties can be automatically monitored and stabilized within narrow bounds, ensure good inductor life time and constant quenching properties.

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New concept for low pressure carburizing in a production line

New concept for low pressure carburizing in a production line

Autoren: Matthias Rink / Markus Reinhold

Traditional atmospheric carburizing as well as low pressure carburizing (LPC) are well-established processes in the thermochemical heat treatment industry. Although atmospheric carburizing with oil quenching is widely used in the automotive industry more and more process development experts verify the opportunities to operate LPC lines using high pressure gas quenching (HPGQ). Due to its excellent heat transfer HPGQ with helium gas was so far the first choice for automotive gear applications. On the cost side it is expensive. This article presents heat treatment examples that demonstrate how components made of normal automotive or machining steel grades can be quenched efficiently in nitrogen.

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