When drawing low-carbon steel wire, high-carbon steel wire, special alloy steel wire and stainless steel wire, a lubricating film will be formed with the deformation temperature of steel wire in the process of high temperature and high pressure drawing, which will protect the finished wire and improve the surface quality of the finished wire.
Wire drawing powder can be roughly divided into two categories: Naki wire drawing powder and Calcium wire drawing powder.
Wire drawing powder is a process lubricating material in wire drawing. Its components are very complex, usually including calcium hydroxide, sodium hydroxide, stearic acid, animal fat, vegetable fat, paraffin, industrial soap, talcum powder, industrial alkali and so on. Its main function is to form a lubricating film between the drawn metal wire and the drawing die wall, so as to reduce the friction between the interfaces and reduce the energy consumption in the drawing process.
Prevent adhesion to the metal die wall due to heating, thus reducing the energy consumption and temperature rise during drawing, prolonging the service life of the wire drawing die, ensuring the surface quality of the product and making the deformation uniform.
Secondly, according to the requirements of wire products, the drawn steel wire has some characteristics that meet the subsequent processing, such as the thickness of residual lubricating film, whether it is easy to clean, whether it can prevent rust, the ability to combine with other media, and the weldability.
Extended data:
Wire drawing powder should generally have the following properties:
(1) can be firmly adsorbed on the surface of steel wire and enter the wire drawing die with the steel wire, effectively separating the two interfaces in the deformation zone;
(2) High pressure and high temperature resistance. Under the conditions of high pressure and temperature rise in the drawing process, the lubricating film can still maintain its continuity and lubricity without being damaged or caked, that is, it has physical and chemical stability;
(3) It has good ductility and lubricity, that is, it can not only be firmly adsorbed on the surface of steel wire, but also be deformed with steel wire stretching. The lubricating film has a layered structure, and the molecular binding force in each layer is strong, while the molecular binding force between layers is weak.
(4) The components that make up the wire drawing powder will not react chemically with the steel wire matrix to generate compounds that affect the performance of the steel wire, or corrode the steel wire, so it is easy to remove;
(5) No environmental pollution, no harm to human body, abundant resources, low cost and easy preservation.
Baidu Encyclopedia-wire drawing powder