HEAT TREATMENT LINES
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HEAT TREATMENT LINES For Hot Formed Materials TENOVA. INNOVATIVE SOLUTIONS FOR METALS AND MINING

TENOVA LOI THERMPROCESS Tenova LOI Thermprocess is your global partner in the world of industrial furnace technology. Our clients appreciate our know-how and experience backed by hundreds of references and a history of about 100 years in the furnace sector. We offer highly advanced process technologies, high reliability, high-quality products and services, and a wide range of custom-tailored solutions for reheating and heat treatment plants for the metal industry. Tenova LOI Thermprocess is a member of the Tenova Group, leveraging a total staff of more than 2,500 forward-thinking employees...

Tenova and LOI – Since 1957 Leaders in Reheating Furnace Technology CUSTOM-ENGINEERED REHEATING FURNACES FOR C STEEL, STAINLESS STEEL OR SILICON STEEL: Tenova LOI Thermprocess and Tenova Italimpianti are the world leaders in industrial furnaces for the reheating of long or flat products as well as for forgings. The companies’ technical leadership is backed by the long histories of Italimpianti and LOI and confirmed by hundreds of reference plants in the following fields: • Pusher-Type Furnaces for blooms, slabs, billets and forgings • Walking Beam Furnaces for heavy-gauge plates, especially...

ADVANCED HEAT TREATMENT FOR PLATES & FORGINGS New material grades and increasingly stringent specifications for strength, corrosion resistance and forming are the result of the market trend towards leaner steel constructions. Tenova LOI Thermprocess is the world leader in industrial furnaces for the heat treatment of plates and forgings. We implement projects in these industries throughout the world. We supply custom-engineered, mathematically optimized heating and cooling systems that • precisely improve material properties and meet the requirements for microstructure changes defined in...

Quenching and Tempering of Heavy Plates GENERAL FEATURES Numerous references Tenova LOI Thermprocess has been the leading company in this field since the 1990s with more than 30 quench facilities and more than 50 furnace installations throughout the world. Plates can be produced with widths up to 4.9 m, thicknesses from 2 mm up to more than 150 mm and lengths up to 25 m. Tenova LOI Thermprocess Q&T lines for hardening, normalizing and tempering are ideal for mass producers as well as niche producers with small batches. Everything from a single source Comprehensive process know-how, design,...

Roller Hearth Furnaces for Normalizing (NF) NORMALIZING FURNACES Our normalising furnaces are the perfect supplement to Q&T lines in view of the rising demand for normalizing. Normalizing is the easiest way to influence the mechanical properties of carbon steel. For heavy plate normalizing, the process involves heating to normalizing temperature in a furnace to completely dissolve the carbon, which is present in the steel in the form of carbides at room temperature. Tenova LOI furnaces may be heated either by open burners firing directly into the furnace, or indirectly by radiant tubes. Our...

Stationary and Continuous Quenches  High-throughput continuous quench for heavy plates. QUENCHES The quenching facility is the key component of a LOI heavy plate Q&T line. Tenova LOI Thermprocess offers stationary (throughputs of up to 10 t/h) and Continuous Quench facilities (up to more than 100 t/h). A Stationary Quench can handle one plate at a time. This extremely short type of Quench can be combined for example with LOI oscillating Roller Hearth Furnaces. The key advantages of a Continous Quench are higher throughput, higher reproducibility and higher cooling uniformity. The...

iQuench® With its iQuench® technology, Tenova LOI Thermprocess offers a wide variety of quenching modes and a full range of heat transfer rates combined with a unique, powerful mathematical quenching model in an overall automation concept. A patented system of slit, full and flat stream nozzles as well as full cone nozzles is arranged in a complex configuration in successive cooling sections. They are precisely controlled in dependence of flow rate, water pressure and distance from the plate to guarantee the best possible mechanical properties and flatness over a wide range of thicknesses....

LOI PROPRIETARY SLIT NOZZLE SYSTEM The patented LOI system of slit nozzles, arranged in a complex configuration in succeeding cooling sections results in homogenous flow rates over the entire width. The combination of precisely designed equipment with an intelligent model makes iQuench® a unique and powerful masterpiece of engineering. The cooling system parameters are  dynamically adapted during treatment to guarantee not only excellent mechanical properties but also high flatness even of thin plates. Standard market slit nozzle LOI’s optimized slit nozz

Roller Hearth Furnaces for Tempering (TF) HIGH CONVECTION TECHNOLOGY (HCT) The HCT consists of open-, fired burners and horizontal recirculation systems which transfers the heat from the mixed flue/furnace atmosphere by convection. This high convection allows a temperature uniformity of ±3 K even at a material temperature of 200 °C. � Q&T line with NF, TF and Quench. TEMPERING FURNACES The tempering of carbon steel is the final step in the heat treatment process and influences the final material properties within a wide range. The precision of temperature control is the most important issue...

Rotary Hearth Furnaces ROTARY HEARTH FURNACES Tenova LOI Thermprocess is the world’s leading supplier of Rotary Hearth Furnaces for a variety of process applications and product types (even up to 67 m in diameter). Computerized fluid dynamic simulation and lab tests are used for the effective design of waste gas systems inside the furnace for special applications including the reheating of forgings. � Tenova LOI Thermprocess Rotary Hearth Furnace with zone separation for gas carburizing of gear parts and Q&T steels