Effects of different spinning temperatures and different water tank water amount distributions(high-medium-low,high-low-high)on the microstructure and properties of SWRH82B high carbon steel wire rod were investigated.The results show that when the spinning temperature is increased to910±10 ℃ and the water in the water tank is distributed according to high-low-high,the temperature difference between the core and the surface of the wire rod increases from 18 ℃ to 30 ℃,the cooling rate of the core of the wire rod is improved,the formation of network cementite is reduced,the detection rate of network cementite is reduced from 70％to 5％,and the grade of network cementite is reduced from grade E to grade C.At the position of 1/4 diameter of wire rod,the lamellar spacing of the sorbite decreases from 153 nm to 138 nm,and the tensile strength of wire rod increases from 1174 MPa to 1187 MPa.For continuous drawing the rod fromφ6.5 mm to φ2.1 mm,the breaking rate is reduced from 9 times/100 t to 1 time/100 t,which effectively improves the drawing performance of hot rolled wire rod.
high carbon steelwire rodnetwork cementiterolling processdrawing properties
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