The method of preventing steel sticking to the walking beam of the steel pipe walking heat treatment furnace

Abstract

The invention provides a method for preventing walking beams of a steel pipe walking heat treatment furnace from being bonded with steel. According to the method, mill scale on the surfaces of fixing beams is blown off through compressed air when steel pipes are heated in the heat treatment furnace, thereby fulfilling the purpose of preventing the surfaces of the walking beams from being bonded with steel. The method comprises the following steps: adopting a device for improving the heat treatment furnace, wherein the device comprises an automatic control system, a fixing beam blow-off device and a pipeline cooling device; and adopting an operation method for preventing the walking beams of the steel pipe walking heat treatment furnace from being bonded with steel. The method provided by the invention has the following beneficial effects: the problem that the walking beams are bonded with steel is solved; the way of stopping production and shutting down the heat treatment furnace for manual polishing of the steeping beams is avoided; the defect of pits on the surfaces of the steel pipes is overcome; the external surface quality of the steel pipes is improved; and the production cost is greatly reduced. In addition, the polishing expense is saved and the unqualified product ratio is lowered, that is, the expense of 10.60 million yuan can be saved per year under the calculation conditions that 100,000 tons of steel pipes are produced in a 6# heat treatment line annually, 40% of the produced steel pipes need to be polished, and the polishing expense reaches 265 yuan per ton.

Description

technical field [0001] The invention relates to a method for preventing the walking beam of a steel pipe walking heat treatment furnace from sticking to steel. Background technique [0002] Seamless steel pipes for petroleum have relatively high requirements on the quality of the outer surface of the steel pipe, and the surface of the product should not have surface defects such as pockmarks and pits. The heat treatment furnace of Tianjin Steel Pipe Group Co., Ltd. produces seamless steel pipes of various specifications. During the heat treatment process of the steel pipes, the heating temperature reaches 900°C. The iron oxide scales on the steel pipe surface usually fall off during the rapid heating process, and a large amount of iron oxide scales fall off and accumulate in the furnace step. On the surface of the walking beam and the roller table, nodules are formed by continuous extrusion of steel pipes and bonded to the surface of the walking beam, and the raised nodules ...

AI Technical Summary

Problems solved by technology

[0003] In view of the structural deficiencies in the prior art, the purpose of the present invention is to provide a method for preventing the walking beam of a walking beam heat treatment furnace from sticking to steel, so as to solve the problem of pitting on the outer surface of the steel pipe caused by the sticking of steel in the walking beam. question

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