Controlled Cooling and Controlled Rolling Method for Carbide Network Control of Bearing Steel Wire Rod
一种控冷控轧、碳化物的技术,应用在钢铁制造领域,能够解决高温差、增加炼钢成本、增加炼钢难度等问题,达到温度均匀、冷却速度快、冷却时间短的效果
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Embodiment 1
[0032] The production specification is Φ18mm high-carbon chromium bearing steel wire rod. The wire rod is rolled into the specified specification by high-speed wire rod and then spun into loose coils. The carbide network control is carried out according to the following process parameters: the temperature of the entering and reducing sizing machine (ie, the final rolling temperature) is 830°C-870°C, and the spinning temperature of the wire rod is 810°C-850°C; the wire rod passes through the water bath online after spinning Controlled cooling by isothermal quenching, the temperature of the water bath is 90°C-97°C, and the cooling time of the water bath is 20s-80s; the temperature of the outlet water after the wire rod is cooled by the EDC water bath is 620°C-630°C. After the wire rod comes out of the water, add a cover to cool slowly. The holding time is 30min-60min, and slowly cool to 430°C-470°C. After taking out the cover, the collection rolls were air-cooled to room tempera...
Embodiment 2
[0036] The production specification is Φ13.5mm high-carbon chromium bearing steel wire rod, and the wire rod is rolled into the specified specification by high-speed wire rod before spinning. The carbide network control is carried out according to the following process parameters: the temperature of the entering and reducing sizing machine is 800°C-850°C, and the spinning temperature of the wire rod is 800°C-840°C; The temperature is 90°C-97°C, and the cooling time in the water bath is 20s-60s; the temperature of the outlet water after the wire rod is cooled by the EDC water bath is 620°C-630°C. After the wire rod comes out of the water, add a cover to cool slowly. The holding time is 40min-60min, and slowly cool to 420°C-450°C. After taking out the cover, the collection rolls were air-cooled to room temperature.
[0037] The chemical composition of the product: C 0.98%, Si 0.29%, Mn 0.31%, Cr 1.45%, Mo 0.01%, Ni0.02%, Al 0.025%, P 0.012%, S 0.001%, Cu 0.09%, Ca 0.0001%, O 0...
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