Cold drawing wire: The way to produce and apply high-strength metal products

Cold-drawn wire, as an important product of metal cold processing, plays a crucial role in multiple industries. It is made from wire rods, which are commonly known as reinforcing bars, through a series of processing procedures.
From a characteristic perspective, the cold-drawn wire has a significant advantage in strength. After cold drawing processing, its yield strength and tensile strength have been greatly enhanced, performing exceptionally well in scenarios with high strength requirements. The surface quality has also improved, becoming smoother, with smaller dimensional deviations, good straightness, and facilitating subsequent processing and usage.
The production process of cold-drawn wire is rigorous and complex. The shell removal process removes the oxide layer and impurities on the surface of the wire rod to lay a foundation for subsequent processing. This can be done using mechanical or chemical shell removal methods. The lubrication process involves applying lubricants such as lime powder and soap solution to reduce friction during drawing and minimize equipment wear. Drawing is the core step. The lubricated wire rod is drawn through a mold hole with a diameter smaller than its own diameter, causing its diameter to decrease and its length to increase. This process usually requires multiple draws, with strict control over the deformation amount and drawing speed to prevent quality defects. After multiple draws, the internal stress of the cold-drawn wire increases, its hardness rises, and its plasticity decreases. Annealing treatment can eliminate stress and restore plasticity. The annealing temperature and time are determined based on the material and specifications. The final surface treatment involves acid washing, water washing, and phosphating to remove dirt, oil stains, and rust, improving the surface quality. The product is then subjected to strict quality inspection, including tests for diameter, tensile strength, etc., and only qualified products can enter the market.
Cold-drawn wire is used in the construction industry for reinforcing concrete prefabricated components, wall tie bars, and decorative steel wire mesh in construction projects; in the industrial field, it can be used to manufacture springs, and processed into components such as screws and nuts; in agriculture, it is used to make breeding cages and build the framework of greenhouse sheds; in daily life, it is used to make clothes drying racks, anti-theft nets and guardrails, and even for the production of handicrafts.