Wire rod processing process

Abstract

The invention discloses a wire rod processing process which comprises the following process steps of: hot rolling, wherein a preheating section temperature during rolling is 600-900 DEG C, a soaking zone temperature is 1160-1280 DEG C and the soaking time is 1.8-3.5 hours; and air cooling after the rolling; solid solution, wherein a solid solution temperature is 1000-1060 DEG C and the solid solution time is 1.5-2.5 hours, and a cooling mode after the solid solution is water cooling; sanding or sand blasting, wherein iron oxide scale on the surface of a solid-solution wire rod is removed by virtue of sanding or sand blasting, the sand blasting speed is 3m / minute, the granularity of sand pills is 0.3-0.5mm, the mesh number of the sanding belt for sanding is 80-120; acid-pickling, wherein the acid-pickling process includes three process steps; polishing, wherein defects on the surface of the wire rod are removed by virtue of the polishing after acid-pickling; and wire-drawing or cold-drawing. According to the invention, the acid-pickling time can be shortened, the usage amount of an acid-pickling solution can be reduced, and the product surface quality can be improved.

Description

technical field [0001] The invention relates to a wire rod processing technology. Background technique [0002] Traditional wire rod production process: steel billet→hot rolling→solution→pickling; after pickling, there are two production methods: wire drawing or cold drawn straight rod. [0003] Iron oxide scale exists on the surface of the wire rod after solid solution, which is a layer of metal oxide attached to the metal surface formed when the metal is heated, heat treated or processed in a hot state. Due to the different factors such as the composition of the metal, the surface temperature, the heating and cooling system, and the oxygen content of the surrounding medium, the scale and structure of the iron oxide scale also vary. The faster the oxidation rate and the longer the oxidation time, the greater the thickness of the oxide scale formed. Iron is a relatively active metal, and various iron oxides have a loose structure, and the rolling of steel and the processin...

AI Technical Summary

Problems solved by technology

[0004] In the conventional way, pickling directly after solid solution, due to the thick oxide skin on the surface and local unevenness, the color of the surface after pickling is inconsistent, and too much pickling solution used pollutes the environment, etc.; cold pumping There will be various wipes and bruises on the surface after cold drawing caused by handling, such as point-like pits, long-strip wipes, etc., which all affect the surface quality and appearance, which will inevitably affect the product surface or need to be added later. Additional processing steps will increase the processing cost. In addition, there is another problem with direct cold drawing, that is, there is pickling residue on the surface, and the original color (silver white) of the metal cannot be fully reflected.