Production technology for bearing steel wire rod

Abstract

The invention discloses a production technology for a bearing steel wire rod. The production technology comprises the following working procedures of blank pretreatment, billet steel heating, high-pressure water de-scaling, rough and intermediate rolling and pre-finishing rolling, finish rolling, reducing and sizing rolling, on-line finish product diameter measurement, spinning, air-cooling and finishing. Bearing steel is composed of, by weight, 0.95 percent-1.05 percent of C, 0.25 percent-0.45 percent of Mn, 0.15 percent-0.35 percent of Si, less than or equal to 0.02 percent of P, less than or equal to 0.006 percent of S, 1.45 percent -1.6 percent of Cr, less than or equal to 0.1 percent of Ni, less than or equal to 0.13 percent of Cu, less than or equal to 0.002 percent of Ti, less than or equal to 0.04 percent of Al, 0.05 percent of Mo, less than or equal to 0.001 percent of Ca and the balance being Fe. By the adoption of the controlled rolling and cooling technology, the process control over the bearing steel wire rod is performed to obtain properly spheroidized granular P texture. Good Carbide uniformity is achieved, and surface quality and dimension accuracy are stable. In a bearing steel wiredrawing factory, one ball can be drawn to form the finished steel wire in a one-off mode, so that production efficiency is substantially enhanced, and meanwhile the production cost is lowered.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to a production process of wire rods, in particular to a production process of bearing steel wire rods. Background technique [0002] In the prior art, bearing production enterprises use bearing steel wire rods (wires) such as GCr15 as raw materials to make steel balls, balls, needle rollers, etc., because the plasticity index of bearing steel wire rods is poor, generally the bearing steel wire rods need to be processed Two times of spheroidization and two times of drawing, the production cost is relatively high, and the uniformity of carbides and surface decarburization are difficult to control, which affects the service life of the bearing. Contents of the invention [0003] In view of the shortcomings of the above prior art, the purpose of the present invention is to provide a production process for bearing steel wire rods. The bearing steel wire rod obtained by this production process ...

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Problems solved by technology

[0002] In the prior art, bearing production enterprises use bearing steel wire rods (wires) such as GCr15 as raw materials to make steel balls, balls, needle rollers, etc., because the plasticity index of bearing steel wire rods is poor, generally the bearing steel wire rods need to be processed Two times of spheroidization and two times of drawing, the production cost is high, and the carbide uniformity and surface decarburization are difficult to control, which affects the service life of the bearing

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