Industrial furnace in the production practice to select the quenching heating temperature of the workpiece, in addition to comply with the above general principles, but also consider the chemical composition of the workpiece, technical requirements, size and shape, the original organization and heating equipment, cooling media and many other factors, The heating temperature is adjusted appropriately. Such as alloy steel parts, usually take the upper limit, take the lower limit for the complex shape parts.
The quenching heating temperature selected by the new toughening process is different from the commonly used quenching temperature. For example, subcritical quenching is quenching of subeutectoid steels at a temperature slightly lower than that of AC3 after austenitizing, which improves toughness, reduces brittle transition temperature, and eliminates temper brittleness. Such as 45, 40Cr, 60Si2 and other materials made of industrial furnace temperature quenching heating temperature of AC3-(5 ~ 10 °C). Using high temperature quenching can obtain more lath martensite or make all lath martensite to increase strength and toughness. If 16Mn steel quenched at 940 °C, 5CrMnMo steel quenched at 890 °C, 20CrMnMo steel quenched at 920 °C, the effect is good.
High-carbon steel, low-temperature, rapid, short-time heating quenching, appropriate to reduce the quenching heating temperature of high-carbon steel, or the use of rapid heating and shorten the holding time method, can reduce the carbon content of austenite, improve the toughness of the steel. In order to complete the transformation of the internal and external parts of the workpiece, the dissolution of carbides and the homogenization of the austenite composition, it is necessary to keep the temperature at the quenching heating temperature for a certain period of time.
Original article reproduced please indicate the source: Copyright Jiangsu Gaochun Industrial Furnace Co., Ltd.
The quenching heating temperature selected by the new toughening process is different from the commonly used quenching temperature. For example, subcritical quenching is quenching of subeutectoid steels at a temperature slightly lower than that of AC3 after austenitizing, which improves toughness, reduces brittle transition temperature, and eliminates temper brittleness. Such as 45, 40Cr, 60Si2 and other materials made of industrial furnace temperature quenching heating temperature of AC3-(5 ~ 10 °C). Using high temperature quenching can obtain more lath martensite or make all lath martensite to increase strength and toughness. If 16Mn steel quenched at 940 °C, 5CrMnMo steel quenched at 890 °C, 20CrMnMo steel quenched at 920 °C, the effect is good.
High-carbon steel, low-temperature, rapid, short-time heating quenching, appropriate to reduce the quenching heating temperature of high-carbon steel, or the use of rapid heating and shorten the holding time method, can reduce the carbon content of austenite, improve the toughness of the steel. In order to complete the transformation of the internal and external parts of the workpiece, the dissolution of carbides and the homogenization of the austenite composition, it is necessary to keep the temperature at the quenching heating temperature for a certain period of time.
Original article reproduced please indicate the source: Copyright Jiangsu Gaochun Industrial Furnace Co., Ltd.
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