advent of stainless steel, we are required to engineer Harry Brearli.Adding to metal chemical element called chromium, he sought increasing the melting temperature.It is required to improve the performance of artillery barrels.During these experiments it was found that the resulting alloy has differences as compared with others.They lie in the chemical resistance.This occurs due to the formation on the surface of the film of chromium oxide.
Studies in stainless steel began in 1871, and the first patent was filed in 1913.The modern analogue of stainless steel, which meets all the requirements for strength and chemical properties was obtained in 1924 a scientist by the name of Hartfield.
basic notions of stainless steel
in literature references or other corrosion-resistant steel has the following notation: "Steel brand 08H18N10."This means the content of the following elements in it:
- carbon - less than 0.8%;
- chrome - 18%;
- nickel - 10%.
This basic chemical elements, but also present in the
main stainless steel products
of stainless steel produced high-quality products such as:
- stainless wire;
- sheet steel;
- tubes of different wall thicknesses and inner diameter;
- shaped articles.
also a lot of household knives and food processors nodes is made of this material.
Stainless Steel Wire
Like any other product steel wire is produced according to current Russian standards.
Regulates the production of such matter, as stainless wire, GOST 18143-72.According to this document, it has a thickness of from 0.3 to 6 millimeters.
This wire can be used as an end product, and can be further processed by forming.Then you can get out of it:
- chain with different size units,
- grid with different grid spacing,
such wire cross section is usually circular, but can also be found species oval or square.Cylindrical section is very useful when using the material during the same welding stainless steel.
stainless wire has the following key benefits:
- high corrosion resistance to moisture, aggressive industrial environments and condensate;
- wire with a high content of molybdenum, chromium, nickel, copper, silicon, vanadium, has a high heat resistance, reliability and durability.
Use of stainless steel wire
Due to long life, resistance to acid and alkaline environments, wire stainless steel is widely used in two ways:
- knitting ropes;
- weave mesh filter.
stainless wire, the price of which varies from 120 to 350 rubles per kilogram, depending on the thickness and characteristics, wide application in such industries as:
The extensive development of the chemical industry required the creation of metal metallurgy, capable of maintaining high mechanical properties in corrosive environments.In addition to resistance to various chemical elements, in some industries, it has required properties and with which the metal can withstand extremely high temperatures.Stainless steel solves many of the tasks.Besides application in the food industry different material impossible.
modern level of processing of metal products enables to produce complex products, but with all this, can not do without welded joints.Stainless steel wire is used for welding products in complex sites that are exposed to aggressive media.
main advantage possessed by stainless welding wire, is that during use the welded seam substantially pure, with no harmful slags and inclusions parasitics.By using stainless steel material itself seam is not exposed to oxidation.Payment for these advantages is that the welding process in this case is quite complicated, and consumables - road.
Stainless steel wire is used only in automatic welding.She served an automatic feeder, it also passed on the current.
in the arc zone enters a protective gas which displaces oxidizers, due to this there is a complete prosekanie seam and connection of all components.
Welding wire is wound in a steel drum continuous lengths up to 50 meters.The average diameter of the drum is 50 millimeters.Wire feed with the spindle is rotating the two biasing coils.In the middle of the slanting cut grooves, with which there is grip the wire and feed it to the welding gun.Before winding stainless steel wire it is carefully cleaned of dirt and foreign substances.
wire manufactured by cold rolling and hot working.There are two types of accuracy - normal and high.In the latter case, after labeling in parentheses, the letter P.
Wire Stainless has two main marking - domestic and foreign.
Russian labeling has an alphanumeric view - 10X17H13M2T.The next order of the letters and numbers mean its internal structure and chemical composition.The numbers determine the percentage composition of one or another element, and the letter - the element itself.The above abbreviation stands as follows:
- 0,1% carbon;
- chromium - 17%;
- nickel - 13%
- manganese - 2%
- letter T means that the wire is made by heat treatment.
European standard is quite complex and has no uniform labeling standards.Every steelmaker patents its composition.