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This article was published in Metalworking, Thermal Processing, 2009, Issue 07
Combined heating furnace and its application in heat treatment of castings
In recent years, in order to meet the special requirements for steel castings in terms of strength and low temperature impact toughness in high-grade railways (including subways and light rails) and construction machinery at home and abroad, in addition to strict requirements on the chemical composition of steel castings, Quenching and tempering measures are also commonly used in heat treatment. To this end, in the absence of natural gas and city gas supply, the use of self-made gas heating, and then the combined flow of electric kiln heat, high-quality solution to the problem of quenching and tempering of special steel castings, better adapted The production requirements for high-performance steel castings at home and abroad have also achieved environmental protection and energy conservation. This paper introduces the structure of the combined heating furnace and its application in the heat treatment of high-grade castings.