Mechanical Bearing 6002

How to obtain the spheroidization structure is an important issue in the production of bearing steel, and controlled rolling and cooling is an important Mechanical Bearing 6002 production process of advanced bearing steel. The subsequent 720℃~730℃ recrystallization annealing was changed to 760℃ structure annealing.

Developed high-frequency hardening bearing steel, using ordinary medium-carbon steel or medium-carbon manganese, chromium steel to replace ordinary bearing steel through high-frequency heating and quenching, which not only simplifies the production process, reduces the cost, and increases the service life.4ppm, reaching the level of vacuum remelted bearing steel. If the eutectoid steel or high-carbon steel has a fine grain structure before hot working or can form fine grains during processing, it will exhibit superplasticity at a certain strain rate within the melting temperature range (0.6).

The oxygen content of bearing steel produced in Japan and Sweden has dropped below 10 ppm. At present, the longest type of continuous heat treatment furnace is 150m. Improve cleanliness (reduce the content of impurity elements and inclusions in steel), promote the small and uniform distribution of non-metallic inclusions and carbides in steel, and increase the contact fatigue life of bearing steel. In recent years, my country has also developed GCr4 bearing steel that can save energy, resources and impact resistance..　　

The fatigue life of GCr465 and SCM465 developed by Japan is 2~4 times higher than SUJ-2. Improving the cleanliness of bearing steel, especially reducing the oxygen content in the steel, can significantly extend the life of the bearing.　　 In recent years, Russia and Japan have adopted low-temperature controlled rolling (800℃~850℃).5 at 650°C. Japan and Germany have built high-cleanliness, high-quality bearing steel production lines, which has rapidly increased the output of steel and greatly improved the quality and fatigue life of steel. In this way, a structure with low hardness, good spheroidization and no network carbide can be obtained, and the key is to ensure that the intermediate drawing reduction rate is ≥14%.

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