Tapered roller bearings of the super good quality, so this was trouble. Many manufacturers wouldn't manufacture of bearing, only to ask for a professional technician will manufacture of bearing technology. Production of bearing has a lot of manufacturing process, which is the more technical heat treatment of bearing parts, both also foreign imports bearing manufacture, and domestically produced bearing manufacturing, are inseparable from the technology of bearing heat treatment.
According to tapered roll child bearing parts of chemical components, and shape, and size and the design requirements of mechanical performance of different, can used different of bearing quenching method, each species bearing steel has its fixed of c curve, bearing cooling media of select decided has quenching Hou of metallographic organization and mechanical performance, therefore must focus consider and specific analysis, actually many bearing parts of heat treatment defects of produced and cooling bearing media of select has directly of relationship, while also with specific of operation process about.
Workpiece in heat treatment furnace heated to fully after the austenite, to obtain the required organization and performance, the need for a quenching treatment. After cooling the workpiece to obtain martensite organizations, the cooling rate must be greater than the critical cooling rate, but too-rapid cooling rate and transformed the dramatic volume shrinkage of the workpiece, causing a great deal of stress. Access to martensite should enable the cooling rate as low as possible, ideal for cooling curve as shown in figure.
Choose a suitable quenching media is particularly important, it determines the tapered roller bearing quenching microstructure and properties after, quenching medium usually has three solid, liquid and gas, physical state changes when you press the bearing quenching media is divided into physical state changes in the physical state changes and not the class.
Tapered roller bearing details of heat treatment quality control machinery is the most stringent of the industry as a whole. Heat treatment of bearing parts in the past 20 years, much progress has been made, mainly in the following areas: a study on the basic theory of heat treatment; and study on the application of heat treatment process; the development of new heat treatment equipment and related technology.



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