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淬火热处理是轴承生产过程中不可缺少的工序,是提高轴承机械强度、硬度、耐用度的有效手段。其方法通常是将铁合金加热到850℃左右,然后迅速投入冷却介质中去,在540℃左右铁合金的金相结构由奥氏体向马氏体转变,从而提高产品的硬度和强度。在淬火过程中,为使产品达到理想的硬度和强度,冷却速度即冷却介质的性能是产品质量好坏的决定性因素。由于水的冷却速度太快,容易造成工件变形和开裂;而动植物油使用寿命又太短。于是世界各国就广泛采用矿物油作为淬火介质,但矿物油的冷却性能不
Quenching heat treatment is an indispensable process in the production of bearings, is an effective means to improve the bearing mechanical strength, hardness, durability. The method is usually heated to about 850 ℃ ferrous alloy, and then quickly put into the cooling medium to go around 540 ℃ Ferroalloy metallurgical structure from austenite to martensite transformation, thereby enhancing product hardness and strength. In the quenching process, in order to achieve the desired product hardness and strength, the cooling rate of the performance of the cooling medium is a decisive factor in the quality of the product. As the water cooling rate is too fast, easily lead to workpiece deformation and cracking; and animal and vegetable oils life is too short. So all over the world, mineral oil is widely used as a quenching medium, but the cooling performance of mineral oil is not