Barrels which have undergone surface treatment, e.g. phosphating (F41A21/22)
F41A21/22 Barrels which have undergone surface treatment, e.g. phosphating(18)
FIELD: mining.SUBSTANCE: inner surface of the wellbore is coated with a thermionic material with up to 3 eV, that allows to align the wellbore temperature at its non-uniform heating and, hence, reduce the thermal bending in the wellbore.EFFECT: increased reliability of the wellbore operation with the reduction of energy and material costs.3 cl
FIELD: weapons and ammunition.SUBSTANCE: invention relates to military technology, namely the technology of production of gun barrels. The method of production of a gun barrel consists in the fact that the solid blank on the length of the barrel is cut along the horizontal axis. In each part of the blank a recess is cut for the bore, the surface of the recess is machined. The prepared surface is coated by the method of argon-arc welding in combination with the self-propagating high-temperature synthesis. The non-consumable electrode is used as tungsten-rhenium, and the filler electrode - as the electrode of compacted exothermic mixture of titanium powder with boron and/or carbon. After welding the finishing treatment of horizontal surfaces of the blanks and the surfaces of welding of recesses is carried out to the desired calibre of the barrel. Connection of the treated blank parts to each other to the barrel is carried out on the outer surface by winding with interference in layers of high-strength steel wire or ribbon, or a ribbon of carbon fibre.EFFECT: reducing the weight of the gun, reducing the bending vibrations of the barrel, increasing the durability of the coating while maintaining high service characteristics.4 dwg
FIELD: weapons and ammunition.SUBSTANCE: proposed process comprises preliminary barrel etching and shot blasting. Then, first layer of nickel is applied by electrolytic process. Then, heat treatment is performed by high-temperature annealing at 600-610°C at heating and cooling rate of not over 15°C/min. Now, second layer is applied by slip process from slip composition, containing the following components in wt %: fine powder (Al, Cr, Ni, Fe) - 45-50%; chromic anhydride - 3%; surfactant - 0,2%, chromia-alumina-phosphate binder making the rest.EFFECT: higher wear resistance, homogeneous improved chemical composition of gun barrel.3 cl
FIELD: weapons and ammunition.SUBSTANCE: proposed method comprises barrel boring and reaming. Then, barrel bore is subjected to mandrelling. Gun barrel is subjected to annealing with heating to 0.9-0.95 of α to γ phase transition temperature at the rate not higher than 10-15°C a minute and to finishing mandrelling. Holding in heat treatment makes 85-95 minutes while cooling is performed at the rate not over 15°C a minute.EFFECT: higher accuracy of hits and reliability.2 cl
FIELD: weapons and ammunition.SUBSTANCE: barrel breech end is subjected to hardening by heat treatment and barrel is subjected to external reduction by application of detonation coating on barrel outer surface.EFFECT: higher quality of hardening, simplified process.
FIELD: weapons and ammunition.SUBSTANCE: when manufacturing an item, formation of a coating on an inner surface of a barrel, smooth or rifled barrel, is carried out by means of mechanical pressure from a tool in the amount of at least 2.5 N/mm2. The coating material is represented by finely dispersed powders of natural mineral materials with energy density of at least 80 kJ/cm2 or their mixtures with a process medium. As a result, the coating with thickness of at least 50 mcm is produced. In process of operation the coating of the inner surface of the barrel is recovered periodically via a number of shots determined for each type of firearms by means of a tool developing pressure of at least 2.5 N/mm2 and by using powders of natural mineral materials or their mixtures with a process medium at the ratio of 1:1.EFFECT: on an inner surface of a firearms barrel a corrosion-resistant coating is produced, which recovers the inner surface of the barrel and increases close pattern of shooting.2 cl, 2 ex
FIELD: weapons and ammunition.SUBSTANCE: creation method of protective antifriction coating on inner surface of barrel channel of small-arms and artillery systems is implemented during firing by supplying protective antifriction compound contained in annular grooves of drive obturating device to "barrel - drive obturating munition device" contact area.EFFECT: simplifying the application process of protective antifriction coating on inner surface of the barrel channel and shortening the time required for that process; providing uniform coating of similar parts of the barrel channel; improving the fire safety level on the position of arrangement of small-arms and artillery systems.3 cl, 5 dwg
FIELD: weapons and ammunition.SUBSTANCE: method consists in application of marking elements that indent a bullet onto an inner surface of a rifled gun barrel. The difference consists in application of marking elements on the inner surface of the rifled gun barrel by firing a bullet with previously applied marking elements.EFFECT: definite identification of a rifled gun using a bullet with application of previously applied marking elements.3 cl
FIELD: weapons and ammunition.SUBSTANCE: identification system is characterised by availability of a marking element on the inner surface of a rifled barrel and a cartridge chamber of firearms. The marking element is a mixture of at least three radioactive isotopes selected from a group that contains 69Co, 55Fe, 210Pb, 63Ni and 90Sr.EFFECT: identification of firearms is achieved both with the help of a bullet and an empty case.
FIELD: weapons and ammunition.SUBSTANCE: method consists in application of coating to gun striker surface, which provides penetration of set of microelements into surface of case capsule during firing, determination and comparison of information signals the first one of which represents response of capsule surface after its contact with striker, and the second one from surface of case capsule, which is shot from unknown gun. As individual marks used for identification with the help of method of radioactive indicators there used are at least three radioactive isotopes chosen from the group containing 69Co, 55Fe, 210Pb, 63Ni1 and 90Sr, and thickness of coating on surface of gun striker is 3.0 to 5.0 mcm.EFFECT: improving reliability of analysis result.
FIELD: weapons and ammunition.SUBSTANCE: identification system is characterised by available marking element on striker surface, and mixture consisting at least of three radioactive isotopes chosen from the group containing 69Co, 55Fe, 210Pb, 63Ni and 90Sr.EFFECT: unique specific identification of item of mass gun as per striker mark on case.
FIELD: weapons and ammunition.SUBSTANCE: method consists in application of coating 3.0 to 5.0 mcm thick to surface of gun striker, which provides penetration of set of microelements to the surface of primer of cartridge during firing. At least three radioactive isotopes chosen from the group containing 69Co, 55Fe, 210Pb, 63Nil and 90Sr are used as individual marks applicable for identification by using the method of radioactive indicators.EFFECT: enlarging the identification period of gun as per fired cartridge.
FIELD: weapons and ammunition.SUBSTANCE: method consists in application of coating at least to some portion of inner surface of rifled gun barrel and to the surface of cartridge chamber. Coating thickness on cartridge chamber surface is 2.0 to 3.0 mcm, and inner barrel surface - 3.0 to 5.0 mcm. At least three radioactive isotopes chosen from the group containing 69Co, 55Fe, 210Pb, 63Nil and 90Sr are used as individual marks applicable for identification by method of radioactive indicators.EFFECT: enlarging the identification period of gun and improving analysis result quality.3 cl
FIELD: weapon and ammunition.SUBSTANCE: method includes preparation of bore surface and coating. Bore surface is prepared with mixed native minerals and biological enzyme systems dissolved and suspended in isopropyl alcohol at temperature 50°...80°C within 60...90 minutes. Then it is covered with polyfunctioning composition of mixed homogeneous and heterogeneous catalysts and dispersion-hardening systems in viscous carrier. Further layer is heat-treated within 2...4 hours at temperature 110°...120°C. Then bore is assembled, firearm is loaded with bullet or shell and shooting is made for hardening of applied coating. Number of shots depends on barrel bore calibre.EFFECT: provided antifriction, wear-resistant and anticorrosive protective coating of barrel bore; correction of its internal geometry and elimination of erosion-and-corrosion wear and internal splits.2 cl, 4 dwg
FIELD: weapons.SUBSTANCE: method is used for identifying weapons, released by small consignments. The method involves depositing a composition from four metals, radiological half lives of which are not less than 5 days, on the inner surface of a cartridge chamber and, at least, partially on the inner surface of a barrel assembly, and subsequent determination of the qualitative and quantitative composition of the metals released during shooting using neutron activation analysis of the surface of shell and bullet.EFFECT: improved reliability of the method.2 ex
FIELD: weapons.SUBSTANCE: method is used for identifying weapons, released by small consignments. The method involves depositing on the inner surface of a cartridge chamber a composition of three metals, radiological half lives of which are not less than 5 days and subsequent determination of the qualitative and quantitative composition of metals intruding into the surface of the shell during shooting using neutron activation analysis.EFFECT: improved reliability of the method.2 cl, 2 ex
FIELD: weapons and ammunition.SUBSTANCE: invention relates to the field of development and fabrication of custom made firearms and may be used for the identification of rifled barrels of small arms that are manufactured in small lots. A method consists in applying a coating onto the inner surface of rifled arms barrels and cartridge chambers. The coating provides penetration of a set of microelements into the lateral surface of a bullet while it passes through the barrel in the course of firing and identification of the arms using neutron activation analysis of the bullet and cartridge case surfaces. Moreover, the applied coating contains three metals with their radioactive isotopes half-life period not less than 5 days.EFFECT: providing unambiguous indentification of rifled weapons.2 cl
The invention relates to a defense technique, namely the production of gun weapon systems, and can be used for repair and restoration
The invention relates to weapons technology and can be used in forensics