Heat Treating and Gas Nitriding


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DISCONTINUED PRODUCTS

Die Preheat Ovens

The Nitrex Die Preheating System safely preheats nitrided aluminum extrusion dies in a protective gas atmosphere, prior to placing them in presses. The key benefit is the properly controlled preheating process that prevents excessive oxidation of the die surface even if it is left in the preheating oven for extended periods of time. Once a die is loaded and its preheating cycle selected, the computer takes over all further operations until the die is ready to be unloaded.

A recent Nitrex study, undertaken to optimize the conditions of preheating, analyzed the effects of holding H13 steel in air and nitrogen at temperatures in the range from 450 to 600°C (842 to 1112°F) and times from 1 to 25 hours. It demonstrated that preheating the dies in a protective atmosphere of nitrogen could significantly reduce the deterioration of the surface.

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Die Preheat Control Systems

The Nitrex Die Preheating System system incorporates features like on-screen alarms, overheat protection control, automatic oven purge, troubleshooting and diagnostic help menus, process logging and archiving capabilities, automatic process restart in case of a power failure, and networking with the main production system.

Click here to view a modular front-loading oven with an automatic control system that monitors and controls all preheating stages and parameters such as temperature and gas flow, as well as elapsed / remaining time, in an automatic and continuous manner.

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