Wire drawing powder

Characteristic of the wire drawing powder

1.Good grease property: The wire drawing powder has good grease property and can form a protective film on the metal surface, which makes the metal surface have better wear resistance after applied on it.

2.Anti-wear effect: The wire drawing lubricant powder can reduce the friction coefficient between metal and metal or between metal and die material, so that it reduce the wear rate of these materials during wire drawing process, which will make the product have a longer service life than normal one.

3.Abrasion resistance: The wire drawing lubricant powder can form an anti-abrasive layer on the surface of the metal during the wire drawing process, which will protect metal surface from damage caused by rubbing against other objects during the production process.

4.It can be firmly adsorbed on the surface of the steel wire and enter the drawing die with the steel wire, effectively separating the two interfaces of the deformation zone.

5.High pressure and high temperature resistance, can maintain its continuity and lubricity without being damaged, coking, agglomeration and deterioration, with good physical and chemical stability.

6.It has good extensibility and lubricity, not only can be firmly adsorbed on the surface of the steel wire but also can be extended and deformed with the steel wire.

7.It does not pollute the environment, is harmless to the human body, and is rich in resources, low in cost, and easy to store. A layer of lubricating film is formed between the drawn metal wire and the wall of the drawing die to reduce the interface friction and reduce energy consumption.

8.Prevent bonding due to heat to reduce energy consumption and temperature rise, extend the service life of the drawing die, ensure the surface quality of the product, and make the deformation uniform.

9.Make the drawn steel wire have some characteristics, such as the thickness of the residual lubricating film, whether it is easy to clean, whether it is rust-proof, bonding ability, plating treatment, welding performance, etc.

Functions of the wire drawing powder

Its main ingredients are lime, water, tallow, paraffin, soap, stearic acid, talc, and alkali.

Its main function is to form a layer of lubricating film between the metal being drawn and the wall of the wire drawing die. It will reduce the friction between the interfaces and reduce the power consumption during drawing to prevent the occurrence of metal on the die wall due to heat generation.

The second function is to make the drawing after drawing according to the requirements of the metal wire product. The steel wire has some characteristics suitable for subsequent processing.

(1)the thickness of the residual lubricating film. （2） whether it is easy to clean. （3）whether it can prevent rust. (4)the ability to combine with other media, and the performance of soldering.

The Wire drawing powder should generally have the following advantages:

• It can be firmly adsorbed on the surface of the steel wire and enter the drawing die with the steel wire, effectively separating the two interfaces of the deformation zone.
• Resistance to high pressure and high temperature. Under the conditions of high pressure and temperature rise generated during drawing. The lubricating film can still maintain its continuity and lubricity without being damaged, coking, agglomerating, or deteriorating. That means it has physical and chemical properties at the same time.
• It has good extensibility and lubricity. It can not only be firmly adsorbed on the surface of the steel wire but also can be extended and deformed with the steel wire. The lubricating film has a layered structure, and the molecular bonding force in each layer is strong.
• The components that make up the lubricant will not chemically react with the steel wire matrix to form compounds that affect the performance of the steel wire. So it would like to make corrosion to the steel wire and be easy to remove.
• It does not pollute the environment. It is harmless to the human body, is rich in resources, is low in cost, and is easy to preserve.

Application of the wire drawing powder

The powder can be used in the drawing process of galvanized wire, welding wire, spring wire, welding electrode, steel bar and etc.

1) Lubricating the surface of the wire to reduce friction during drawing process;

2) Improving the plasticity of metal to prevent cracking during drawing process;

3) Increasing yield strength of steel strip so that it can be drawn into a desired shape through rolling mill;

Wire Drawing Lubricant is a kind of lubricating material that is used with wire drawing machine. It can reduce friction between the wire and the wire drawing die, so as to improve the drawing process efficiency, which has a significant effect on product quality. It will make the wire drawing smoothly and the drawn wire will be black.

How to select the suitable wire drawing Lubricant:

There are sodium soap and calcium soap based drawing powder.

Sodium soap is made by the saponification reaction of fatty acid (oil) and alkali. Calcium soap is made by the saponification reaction of fatty acid (oil) and white ash.

Depending on different wire drawing process, according to different drawing speed, different steel wire model, different wire drawing machine type, we will choose suitable wire drawing lubricant for you.

Work theory of the wire drawing powder

FRICATION:

During the drawing process, the wire material is directly related to the wire drawing die, which inevitably generates friction. Reducing friction is the most effective way to improve drawing efficiency.

The magnitude of friction depends on 3 elements: normal pressure, coefficient of friction, and contact area. Changing the state of friction is the key measure to reduce friction.

According to friction theory, there are four states of sliding friction:

(1)dry friction (the friction coefficient in the dry friction state is as high as 0.7-1.0)
(2)boundary lubrication friction (the friction coefficient is about 0.10-0.30)
(3)mixed lubrication friction (the friction coefficient is about 0.005-0.10 )
(4)hydrodynamic lubrication friction (friction coefficient up to 0.001 ~ 0.005)

LUBRICATION

It has a great impact on the quality of steel wire products, and it is very important to do a good job of lubrication in wire drawing production.

Wire drawing lubrication methods can be divided into two types: dry lubrication and wet lubrication. Meanwhile, wet lubrication is divided into two types: oily lubrication and water-based lubrication. Arranged by the cooling effect, water-based lubrication is better than oil-based lubrication, and wet lubrication is better than dry lubrication.

Dry powder lubrication
Dry lubrication usually uses dry powdered soap lubricants. The main components of dry powder lubricants are compounds of fatty acids and alkali metals, namely metal soaps.

Adding an appropriate amount of adhesion additives (borax, sodium sulfate, phosphate, etc.) to the lubricant can also effectively increase the thickness of the lubricating film. Dry powder lubricants sometimes contain a certain amount of layered inorganic substances.

Oily lubrication
Oil-based lubricants are usually composed of many mineral oil, animal and vegetable oils, synthetic oils, oiliness improvers, extreme pressure additives, viscosity improvers, antioxidants, rust inhibitors, and defoamers.

Water-based lubrication
Water-based lubricants can be divided into emulsions and soap solutions.

The emulsion is an oil-in-water emulsion composed of oil in water, usually composed of mineral oil, oily additives, emulsifiers, preservatives, antioxidants, etc.

The soap solution is composed of water-soluble alkali metal soap (potassium soap, sodium soap), adding preservatives and defoamers.