parameter

Overview

Steel wire is one of the four types of steel plates, tubes, shapes, and wires. It is made of hot-rolled wire rods and cold-drawn
Reprocessed products made. According to the shape of the section, there are mainly circle, square, rectangle, triangle, ellipse, flat, trapezoid, zigzag, etc.; according to the size, there are extra fine <0.1 mm, finer 0.1~0.5 mm, finer 0.5~1.5 mm, medium 1.5~3.0mm, 3.0~6.0mm thick, 6.0~8.0mm thick, extra thick>8.0mm; classified by strength, there are low strength <390 MPa, lower strength 390~785 MPa, normal strength 785-1225 MPa, higher strength 1225~1960 MPa, high strength 1960~3135 MPa, extra high strength> 3135 MPa; classified by purpose: ordinary quality steel wire includes welding rod, nail making, net making, packaging and printing industry Steel wire, steel wire for cold heading for cold heading rivets, screws, etc., electrical steel including special steel wire for the production of overhead communication lines, steel core aluminum stranded wire, etc., steel wire for textile industry including thick combs, healds 013, card clothing and needles Steel wire, rope-making steel wire is exclusively for the production of steel wire ropes and spokes. Spring steel wires include steel wires for springs and spring washers, piano wires, tires, cords, and transportation tapes. Structural steel wires refer to steel wires for the watch industry, balls, and automatic machines, and stainless steel wires. Including stainless steel wire and surgical implant steel wire for each purpose mentioned above, resistance alloy wire for heater element and resistance element, tool steel wire including steel steel wire and shoe steel wire.

Production processes

The main processes of steel wire production include raw material selection, iron oxide removal, drying, coating treatment, heat treatment, wire drawing, plating treatment, etc.
See steel wire material for raw material selection.
Iron oxide scale removal refers to the removal of iron oxide scale on the surface of the wire rod or intermediate wire blank. The purpose is to prevent the iron oxide scale from damaging the surface of the mold and steel wire during drawing, prepare good surface conditions for subsequent coating or plating treatments, and reduce friction during drawing Reduce the pulling force. There are two types of methods for removing oxide scale: chemical method and mechanical method. See Chemical Descaling of Wire Rod and Mechanical Descaling of Wire Rod.

Plating treatment

Coating treatment: Coating a layer of metal or alloy on the surface of the steel wire that requires coating on the non-smooth surface. One of the purposes is to make the steel wire anticorrosive to improve its service life, such as galvanizing (see steel wire hot-dip galvanizing, steel wire electro-galvanizing), aluminum plating , Galvanized aluminum alloy, etc.; the second purpose is to make the steel wire have some special properties, such as the production of tire steel wire and steel cord steel wire, in order to ensure that the steel wire and rubber have a good bonding ability, the former requires copper plating and brass plating ( See steel wire electroplating brass) or bronze plating, and the latter requires brass plating. In the production of coated steel wire, in the arrangement of the process flow, some are first plating and then drawing, that is, the plating process is arranged before the drawing of the finished product; some are drawing first and then plating, that is, the steel wire is plated after being drawn into the finished product. Generally, when the steel wire surface coating is required to be bright, dense and with high strength, it is first to be plated and then drawn. However, the requirements for the surface of the steel wire are not very high, and there is no special requirement for the strength and toughness of the finished product, but there are certain requirements for the weight of the coating. In this case, it is first drawn and then plated.

Classification

According to the shape of the section, there are mainly circle, square, rectangle, triangle, ellipse, flat, trapezoid, zigzag, etc.; according to the size, there are extra fine <0.1 mm, finer 0.1~0.5 mm, finer 0.5~1.5 mm, medium 1.5~3.0mm, 3.0~6.0mm thick, 6.0~8.0mm thick, extra thick>8.0mm; according to strength classification, there are low strength <390 MPa, lower strength 390~785 MPa, normal strength 785~1225 MPa, higher strength 1225~1960 MPa, high strength 1960~3135 MPa, extra high strength> 3135 MPa.