Heat processing technology of high-carbon carbon steel coil rod for steel wire rope

Abstract

The invention discloses a heat processing technology of a high-carbon carbon steel coil rod for a steel wire rope. The heat processing technology is characterized by comprising the following steps of: carrying out hot rolling, water passing and cooling and coiling on the high-carbon carbon steel coil rod with the diameter of 6mm-16.5mm so as to obtain coil rod; when the prepared coil rod reaches the temperature range of 820 DEG C-900 DEG C, rapidly throwing the coil rod in a salt groove to keep for 2 seconds-40 seconds in salt bath lower than sorbite temperature at constant temperature; and then putting the coil rod into salt bath or lead bath with the sorbite temperature range to keep at constant temperature for 5 minutes-15 minutes, taking out and cooling naturally, thereby completing the heat processing technology of the high-carbon carbon steel coil rod for the steel wire rope. The heat processing technology of the high-carbon carbon steel coil rod for the steel wire rope can effectively refine the sorbite clique size and interlayer spacing and can improve the uniformity of interlayer spacing; and the product has the advantages of high intensity plasticity, excellent fatigue resistance, long service and the like. The heat processing technology of the high-carbon carbon steel coil rod for the steel wire rope has an obvious effect of improving the high plasticity of a coil rod wire material.

Description

technical field [0001] The invention relates to a high-carbon carbon steel wire rod heat treatment process for steel wire ropes, and belongs to the technical field of heat treatment of metal wire rods for steel wire ropes. Background technique [0002] Existing steel wire rope manufacturing process, at first needs to manufacture steel wire and then carry out twisting into strand, finally synthesize into rope. At present, the raw material for manufacturing steel wire is mainly high-carbon carbon steel wire rod, with a diameter of 6-16mm. The wire rod is smelted into ingots, and then hot-rolled into wire rods. Since the cooling method after hot rolling determines the microstructure and mechanical properties of the wire rod, the cooling process after rolling not only has a decisive impact on the structure control and strong plasticity, but also significantly affects the drawing performance of the steel wire and the rope formation of the steel wire The final service performance...

AI Technical Summary

Problems solved by technology

Comparing the two processes, the lead-bath isothermally treated wire rod has a uniform sorbite structure layer spacing, and its strong plasticity is better than that of the air-cooled process, but the equipment investment is large and pollutes the environment.

Due to the fact that these current processes are directly isothermal in the sorbite region, the interlayer spacing will not be less than 100nm, and the size of the clusters is between 5 and 12mm, and the performance potential of the sorbite structure cannot be fully utilized, so that the existing steel wire ropes are used. The strong plasticity of high carbon carbon steel wire rod is not ideal