Direct heat treatment for hot rolled steel wire rod
专利汇可以提供Direct heat treatment for hot rolled steel wire rod专利检索，专利查询，专利分析的服务。并且PURPOSE:To obtain products having uniform mechanical strength among the coils of wire rods and within the coils in the stage of transferring and cooling the wire rods in the state of superposed rings by changing cooling conditions according to the components of the billets in one lot of a converter and the finishing temp. within one lot. CONSTITUTION:A conveyor 8 for cooling is divided to, for example, 6 parts, and the respective conveyors are made independently drivable and continuously variable and controllable in speed. Blowers 20 and mist coolers 24 are provided to the respective conveyors. In order to eliminate the variation in the strength among wire rod coils, the billets in one lot are divided to the groups having the same chemical components as far as possible, and the constant temp. transformation curves corresponding to the analyzed values of the components of the respective groups are determined. On the other hand, cooling rate patterns are selected from the equationsI-VI among the tensile strength sigmatkg/mm. of the wire rods, Cwt%, wind pressure Pmm.Aq. of blowers, finishing temp. T deg.C, cooling rate Cv deg.C/sec of coils, speed Vm/sec of conveyor, and mist amount Mdl/cm .min. Thereafter, in order to eliminate the variation in the strength in the coils, the P, v and the mist concn. are controlled in such a way that the temp. during cooling and T by each N division of overall length of the coils coincide with the above-described patterns.，下面是Direct heat treatment for hot rolled steel wire rod专利的具体信息内容。
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