Titanium is characterized by light weight, high strength, metallic luster, good corrosion resistance, due to its stable chemical properties, good resistance to high and low temperatures, resistance to strong acids and alkalis, as well as high strength, low density is known as the "space metal", "intelligent metal", "biological metal", "all-purpose metal". "Space Metal", 'Smart Metal', 'Bio-metal', 'All-purpose Metal'.
Titanium wire classification: titanium alloy wire, pure titanium eyeglasses wire, titanium straight wire, pure titanium wire, titanium welding wire, titanium hanging wire, titanium coil wire, titanium bright wire, titanium wire for medical use, titanium nickel alloy wire.
Specification of titanium wire:
A. Titanium wire specifications: φ0.8-φ6.0mm
B. Specification of titanium wire for eyeglasses: φ1.0-φ6.0mm special titanium wire
C. Specification of titanium wire: φ0.2-φ8.0mm special for hangers.
The main uses of titanium wire include: welding wire, production of springs, rivets and so on. Widely used in aviation, marine, petrochemical, medicine and other fields.
1. Welding wire, currently more than 80% of titanium and titanium alloy wire is used as welding wire. For example, all kinds of titanium equipment welding, welding pipe, aviation jet engine turbine disk and blade filler welding, magazine welding and so on.
2. Titanium due to excellent corrosion resistance, in the chemical, pharmaceutical, paper and other industries are widely used, for example, Tianjin chemical plant using 3.2mm of pure titanium wire preparation of a filter.
3. Titanium and titanium alloy wires are used to manufacture fasteners, load-bearing components, springs and so on due to their good overall performance. For example, Xi'an high-pressure valve factory with TC4 wire manufacturing valve pressure spring.
4. Medical and health industry, titanium and titanium alloy wire is used to manufacture medical equipment, implanted in the body of the crown fixed, skull fixed.
5. Some titanium alloys are used to manufacture satellite dishes and shoulder pads for clothes because of their shape memory function.
6. Titanium and titanium alloy wires are used to make various electrodes in electroplating and water treatment industries.
Titanium wire and titanium alloy wire drawing is under the action of the drawing force will coil or wire blank from the drawing die die hole to produce a small cross-section of titanium and titanium alloy wire metal plastic processing. Various metals and alloys with different cross-section shapes and sizes of wire can be produced by drawing. Pulled wire, precise size, surface finish, and the use of drawing equipment and molds are simple, easy to manufacture. In the drawing diameter of less than 0.05mm of ultra-fine wire, through the mold is difficult, in order to improve the stability of the drawing process, to reduce the number of pull-off and through the mold to improve the efficiency of drawing production, can be used with a safety factor of K value greater than 2.0.
In the recrystallization temperature above the drawing is hot drawing, in higher than the room temperature below the recrystallization temperature of the drawing is warm drawing. Cold drawing is the most common drawing method used in the production of metal wires and threads. Hot drawing, the wire into the mold hole before heating, mainly for high melting point metals such as tungsten, molybdenum and other metal wire drawing. Warm drawing, the wire also needs to be heated through the heater to a specified range of temperatures before entering the mold hole for drawing, mainly used for zinc wire, difficult to deform the alloy wire such as high-speed steel wire, bearing steel wire drawing.
According to the drawing process of the wire through the same time the number of mold points, only through a mold drawing is a single drawing, in turn, through a number of consecutive (2 ~ 25) mold drawing is a multi-channel continuous drawing. Single-pass drawing of the line speed is low, low productivity and labor productivity, commonly used in large diameter, low plasticity and shaped wire, wire drawing. Multi-channel drawing line speed is high, high degree of mechanization and automation, high productivity and labor productivity, is the main way of metal wire, wire production. It is divided into non-sliding continuous drawing and sliding continuous drawing.
According to the lubricant state points, the use of liquid lubricants is wet drawing, the use of solid lubricants is dry drawing.
According to the shape of the cross-section of the drawn wire, there are round wire drawing and shaped wire drawing.
According to the role of the pulled wire on the tension points, there is a positive pulling force pulling and counter-pulling force pulling.
There are also special drawing, such as roller drawing!
Process characteristics: wire drawing stress state for the two-way compressive stress is a tensile stress of three-way principal stress state, it is three-way compressive stress is the principal stress state compared to the drawn wire is easier to achieve plastic deformation state.
Drawing of the deformation state for the two-way compression deformation to a tensile deformation of the three-way main deformation state, the state of the metal material to play the plastic unfavorable, more likely to produce and expose surface defects. Wire drawing process of channel deformation by its safety factor limits, channel deformation is smaller is drawn more channels, therefore, in the production of metal wire is often used in the multi-channel continuous high-speed drawing.
Wire drawing in the common problems and solutions
First of all the choice of wet drawing process, generally for small diameter, or surface finish, or subsequent processing process has special requirements for metal drawing. The main categories of wet drawing lubricants are pure oils, synthetic oils, emulsions, pastes and so on. Wet drawing lubricant selection is mainly based on raw material materials, molds, surface quality and downstream applications and many other factors. For example, commonly used stainless steel drawing, generally choose the higher viscosity and special extreme pressure additives of pure oil, carbon steel generally choose emulsion, non-ferrous metals according to the final application requirements can choose pure oil or synthetic oil, you can also choose emulsion. There are special requirements, you can also choose the paste.
Generally speaking, in practice, no matter dry drawing or wet drawing process, there will be a variety of problems. Take a look at the wet pulling process of those common problems, and the corresponding solutions.
1, wire discoloration
Wire (such as copper) surface discoloration is mainly oxidative discoloration, arising from improper temperature and humidity conditions. There may be emulsion concentration is too low or the temperature is not normal; wire attached too much oil; water quality is not qualified; foreign oil mixing and so on.
Find the reason for its discoloration, you can take appropriate measures to solve the problem according to the actual situation. For example, if the emulsion concentration is too low, it will be raised to the normal standard; the temperature is not normal should be adjusted to the normal 35 ℃ ~ 45 ℃; check the exit whether the wire drawing oil overflow; to remove the emulsion mixed with foreign oils and so on.
2, mold wear and tear
Causes of large mold wear, one is the improper operation of the machine, the other is the wrong choice of lubricant. If the machine is not running properly, the operator needs to constantly practice and check its working condition before each run.
In addition, the lubricant plays a key role in assisting and facilitating the drawing process, and its selection is critical. Today, wire drawing products from CONDAT are highly appreciated by many companies. On the one hand, it is a complete range of products, basically covering all the wire drawing applications; on the other hand, VICAFIL? representative lubricants, with fast drawing speed, good chemical compatibility, not easy to break the wire, etc., can extend the service life of the mold. Not only that, CONDAT can also be customized lubrication solutions, walking in the front of the wire drawing industry.
3,Broken wire scratches and burrs
Wire breakage scratches and burrs greatly affect the aesthetics and quality of the product. The cause of these problems, may be due to insufficient lubrication and lead to direct contact between the metal and the mold generated by the contamination of metal chips, mold hole clogging or lubricant deterioration, can be filtered through the equipment to remove the metal chips, remove the clogging and the replacement of lubricants to solve the problem respectively.
4, emulsion stratification / surface precipitates too much
Microbial infestation, PH is too low, liquid water hardness and inorganic salts are too high, the emulsion temperature is too high, may cause emulsion layering or excessive precipitates on the surface of the wire, the solution should also be targeted.
If it is microbial infringement, you can add fungicide, and supplement sodium hydroxide solution or triethylammonium alcohol; PH is too low also need to supplement sodium hydroxide solution or triethylammonium alcohol; when the hardness and inorganic salts of the water used for dispensing is too high, you need to replace the water used for dispensing; and the emulsion temperature is too high, you need to cool it down moderately before using it.
