Heating process before rolling to control the size of titanium inclusions in hypereutectoid cord steel wire rod
A technology of heating process and cord steel, applied in the direction of manufacturing tools, heat treatment furnaces, heat treatment equipment, etc., can solve the problem of sensitive size of brittle inclusions, and achieve the effect of small size, reliable process and high feasibility
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Embodiment 1
[0019] A pre-rolling heating process for controlling the size of titanium inclusions in hypereutectoid cord steel wire rods. First heat the continuous casting slab of hypereutectoid cord steel to 1150~1200℃ in the steel rolling heating furnace for 4~6 hours, then cool the hypereutectoid cord steel slab heated at high temperature to the hypereutectoid Analysis of the normal rolling temperature of cord steel. Then enter the high wire rolling mill for rolling.
[0020] The hypereutectoid cord steel described in this example is SWRH82A, and its continuous casting slab is: the impurity element Ti in the molten steel before casting is 4~6ppm, and the N is 35~40ppm, and the molten steel is cast into 150×150mm by continuous casting machine 2 billet.
[0021] The normal starting temperature of the hypereutectoid cord steel described in this embodiment is 1000-1020°C.
Embodiment 2
[0023] A pre-rolling heating process for controlling the size of titanium inclusions in hypereutectoid cord steel wire rods. First heat the continuous casting slab of hypereutectoid cord steel to 1200~1250℃ in the steel rolling heating furnace for 2~4 hours, then cool the hypereutectoid cord steel slab heated at high temperature to the hypereutectoid Analysis of the normal rolling temperature of cord steel. Then enter the high wire rolling mill for rolling.
[0024] The hypereutectoid cord steel described in this example is SWRH82A, and its continuous casting slab is: the impurity element Ti in the molten steel before casting is 4~6ppm, and the N is 35~40ppm, and the molten steel is cast into 200×200mm by continuous casting machine 2 billet.
[0025] The normal starting temperature of the hypereutectoid cord steel described in this embodiment is 1000-1020°C.
Embodiment 3
[0027] A pre-rolling heating process for controlling the size of titanium inclusions in hypereutectoid cord steel wire rods. First heat the continuous casting slab of hypereutectoid cord steel to 1180~1230℃ in the steel rolling heating furnace for 3~5 hours, then cool the hypereutectoid cord steel slab heated at high temperature to the hypereutectoid Analysis of the normal rolling temperature of cord steel. Then enter the high wire rolling mill for rolling.
[0028] The hypereutectoid cord steel described in this example is SWRH92A, and its continuous casting slab is: the impurity element Ti in the molten steel before casting is 4~6ppm, and the N is 30~35ppm, and the molten steel is cast into 200×200mm by continuous casting machine 2 Billets.
[0029] The normal starting temperature of the hypereutectoid cord steel described in this embodiment is 990-1010°C.
[0030] In this specific embodiment, the soaking temperature of the hypereutectoid cord steel slab in the steel roll...
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