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NTN bearing steel is mainly used in the manufacture of rolling body and rolling of NTN bearing ring.
Because the NTN bearing should have long life, high precision, low calorific value, characteristic of 6203Lu Bearing Specs high speed, high rigidity, low noise, high wear resistance, so the requirements of NTN bearing steel should have: high hardness, uniform hardness, high elastic limit, high contact fatigue strength, toughness, must be a certain hardening corrosion performance resistance, in the atmosphere of the lubricant. In order to achieve the performance requirements, the NTN bearing steel chemical composition uniformity, non metallic inclusion type and content, carbide size and distribution, and other demanding decarburization.

NTN bearing steel in general to high quality, high performance and multi species development direction. NTN bearing steel according to 6203Lu Bearing Specs the characteristics and application environment is divided into: high carbon chromium bearing steel NTN, NTN bearing steel, carburized high temperature bearing steel NTN, stainless steel and special NTN bearing NTN bearing materials used.
As the demand to adapt to the high temperature, high speed, high load, corrosion resistance, anti radiation, developed a series of new NTN bearing steel with special performance needs. In order to reduce oxygen content in bearing steel NTN, the development of smelting technology of vacuum melting, electroslag remelting, electron beam remelting NTN bearing steel. While smelting large quantities of NTN bearing steel by electric arc furnace smelting, develop into various types of furnace and furnace refining.
At present, with capacity of 6203Lu Bearing Specs more than 60 tons of furnace + LF / VD or RH + NTN + rolling bearing steel continuous casting production process, so as to achieve the aim of high quality, high efficiency, low energy consumption. In the heat treatment process, by car type furnace, bell type annealing furnace of continuous annealing furnace atmosphere into the controlled heat treatment. At present, the continuous heat treatment furnace type for the longest 150m, nodular structure of production of NTN bearing steel processing stability and uniform, decarburized layer of small, low energy consumption.