SE407695B - BATTLE PART OF STEEL AND WAY TO MANUFACTURE IT - Google Patents

BATTLE PART OF STEEL AND WAY TO MANUFACTURE IT

Info

Publication number
SE407695B
SE407695B SE7709768A SE7709768A SE407695B SE 407695 B SE407695 B SE 407695B SE 7709768 A SE7709768 A SE 7709768A SE 7709768 A SE7709768 A SE 7709768A SE 407695 B SE407695 B SE 407695B
Authority
SE
Sweden
Prior art keywords
point
heat source
combat
combat part
martensite
Prior art date
Application number
SE7709768A
Other languages
Swedish (sv)
Other versions
SE7709768L (en
Inventor
L-B Fredriksson
Original Assignee
Bofors Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bofors Ab filed Critical Bofors Ab
Priority to SE7709768A priority Critical patent/SE407695B/en
Priority to NL7808695A priority patent/NL7808695A/en
Priority to IT50860/78A priority patent/IT1109363B/en
Priority to DE19782837638 priority patent/DE2837638A1/en
Priority to FR7825052A priority patent/FR2402003A1/en
Priority to NO782955A priority patent/NO782955L/en
Priority to GB7835115A priority patent/GB2013842A/en
Publication of SE7709768L publication Critical patent/SE7709768L/en
Publication of SE407695B publication Critical patent/SE407695B/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06Surface hardening
    • C21D1/09Surface hardening by direct application of electrical or wave energy; by particle radiation
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/16Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for explosive shells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Powder Metallurgy (AREA)
  • Paper (AREA)
  • Massaging Devices (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

7709768-1 2 Föreliggande uppfinning har som huvudändamål att framskapa en anordning och ett sätt som löser den i ovanstående förespegla-de problematiken. 7709768-1 2 The present invention has for its main object to provide a device and a method which solves it as predicted above the problem.

.Det som huvudsakligen kan anses vara känneteoknande för en anord- åning enligt uppfinningen är att i stridsdelen är införda smala- ímartensitstråk, utefter vilka stridsdelen brister vid sin sönder- asprängning. Ett sätt för att framställa en dylik stridsdel för ernående av förfragmentering av densamma går väsentligen ut på att i stridsdelens material inordnas smala martensitstråk. a Stridsdelen är därvid utformad i företrädesvis seg stâlkvalitet..What can mainly be considered as characteristic of a device according to the invention is that in the combat part narrow ímartensitstråk, along which the combat part fails in its disintegration blasting. A way to produce such a combat part for achieving pre-fragmentation of the same is essentially about that narrow martensite lanes are arranged in the material of the combat part. a The combat part is then designed in preferably tough steel quality.

Genom att martensitfasen är extremt spröd kommer den att spricka före grundmaterialet i stridsdelen när denna sönderspränges av aktuell sprängsats. Genom att martensitfasen är extremt spröd kommer en spricka att kunna utbildas och fortplanta sig innan .sprickbildningen i stridsdelens övriga material uppträder. Sprick- spetsens radie kan hållas mycket liten och materialspänningarna kring sprickan blir förhållandevis stora och ett styrt sprick- förlopp skapas. o En anordning och ett sätt enligt uppfinningen skall beskrivas i É nedanstående under samtidig hänvisning till bifogade ritningar där. figuren i sidovy visar en granat som förses med.martensit-I stråk medelst en värmekälla.Because the martensite phase is extremely brittle, it will crack before the base material in the combat unit when it explodes current blast kit. Because the martensite phase is extremely brittle a crack will be able to form and reproduce before .cracking in the other material of the combat part occurs. Cracked the radius of the tip can be kept very small and the material stresses around the crack will be relatively large and a controlled crack process is created. A device and a method according to the invention will be described in É below with simultaneous reference to the accompanying drawings therein. the figure in side view shows a grenade provided with.martensite-I strokes by means of a heat source.

I figuren är en granat angiven med 1 och en värmekälla i form av. en laser med 2. Granaten kan utgöras av en konventionell sådan som innefattar en sprängkropp och en sprängämnessats som vid sin ini- tiering sönderspränger sprängkroppen; Från lasern utgår en laser- strále 3 som reflekteras av en reflektor 4 mot granatens utsida som bildas av nämnda sprängkropp, vilken skall förfragmenteras i enlighet med uppfinningen. lReflektorn 4 är av i och för sig känt slag som medelst ej speciellt visade organ är vippbart anordnad kring punkten 5. Organen kan där- vid vara anordnade, på likaledes i och för sig känt sätt, att åstadkomma vipprörelser på reflektorn inte bara i figurplanet i de med pilarna 6 angivna riktningarna, utan även i en eller flera 7709768-1 3 riktningar i förhållande till nämnda plan. Projektilen är vrid- bart anordnad kring sin axel medelst likaledes ej speciellt visade organ. Roteringen av projektilen kan ske i den med pilen 8 angivna riktningen, den motsatta riktningen eller båda riktningarnaf Genom ett dylikt arrangemang kan laserstrâlen fås att följa av vippningen på reflektorn 4, roteringen på granaten 1 och/eller in- och urkoppling av värmekällan beroende banor eller stråk 9 på projektilens mantelyta. Dessa stråk kan görasfsammanhängande eller indelas i separata från varandra skilda stråk så att geometrier av önskat utseende ernås. Martensitstråken göres därvid så djupa som möjligt är med ifrågavarande metod.In the figure, a grenade is indicated by 1 and a heat source in the form of. a laser with 2. The grenade can be a conventional one such as comprises an explosive body and an explosive kit which at its ini- tiering explodes the explosive body; The laser emits a laser beam 3 which is reflected by a reflector 4 towards the outside of the grenade which is formed by said explosive body, which is to be pre-fragmented in in accordance with the invention. The reflector 4 is of a kind known per se which by means of no special The means shown are pivotally arranged around point 5. The means can then in the case of being arranged, in a manner known per se, that cause tilting movements on the reflector not only in the figure plane in the directions indicated by the arrows 6, but also in one or more 7709768-1 3 directions in relation to said plane. The projectile is rotatable arranged around its axis by means of likewise not specifically shown organ. The projectile can be rotated in the direction indicated by the arrow 8 the direction, the opposite direction or both directionsf Through such an arrangement, the laser beam can be made to follow the tilting of the reflector 4, the rotation of the grenade 1 and / or and disconnecting the heat source depending on paths or lanes 9 on projectile mantle surface. These lines can be made coherent or divided into separate stripes so that geometries of the desired appearance is achieved. The martensite strips are made so deep as possible with the method in question.

Nämnda stråk 9 kan anses bestå av ett antal punkter, av vilka en i figuren är angiven med 10. Laserstrålen upphettar materialet lokalt i respektive punkt till en temperatur som för det valda ståJ.materialet motsvarar martensittemperaturen. När strålen flyttas till nästa punkt i aktuellt stråk svalnar materialet i den förut uppvärmda punkten eller zonen snabbt på grund av att punktens eller zonens area är förhållandevis liten så att det punkten eller zonen omgivande materialet i sprängkroppen mycket snabbt kan absorbera värmet från punkten eller zonen. Härigenom erhålles en snabb härdning som gör att martensitfasen urskiljes och bibehålles. Genom att martensiten har lägre täthet än grund- materialet byggs tryokspänningar in i ytan, vilket i hög grad motverkar statisk sprickbildning. å Genom utnyttjandet av en laser såsom värmekälla kan man med det visade arrangemanget i princip välja det av stråken bildade mönstret godtyckligt samtidigt som arbetet kan utföras i luft.Said path 9 can be considered to consist of a number of points, one of which in the figure is indicated by 10. The laser beam heats the material locally at each point to a temperature as for the selected the standing material corresponds to the martensite temperature. When the beam moved to the next point in the current path, the material cools in the pre-heated point or zone quickly due to the area of the point or zone is relatively small so that the point or zone surrounding the material in the explosive body a lot can quickly absorb heat from the point or zone. Hereby a rapid cure is obtained which makes the martensite phase distinguishable and maintained. Because the martensite has a lower density than the basic the material builds compressive stresses into the surface, which to a large extent counteracts static cracking. å By using a laser as a heat source, you can do it showed the arrangement in principle choose the one formed by the strings the pattern arbitrarily while the work can be performed in air.

Det är aeek även möjligt ett aeteakemme merteneitetraken- medelst elektronstråle, varvid arbetet företrädesvis utföres i vakuum så att en tillräckligt sammanhållen elektronstråle kan erhållas för bildande av ett smalt stråk.It is aeek also possible a aeteakemme merteneitetraken- by means of electron beam, the work being preferably performed in vacuum so that a sufficiently coherent electron beam can be obtained to form a narrow lane.

I en utföringsform av ett sätt enligt uppfinningen utskiljes martensitfasen i respektive punkt av nämnda stråk genom upphett~ ning av materialet i punkten till aktuell temperatur medelst en Homes-ir längs stråken riktbar värmekälla eller reflektor och genom en härdning som.kommer till stånd efter värmekällans förflyttning från berörd punkt medelst snabb värmeavledníng i det punkten omr ïgivande materialet. íI figuren har med 11 angivits ett utrymme, i vilket inläggningen av martensitstråken utföres. Nämnda utrymme förutsättes stå under vakuum i fallet med elektronstrålkälla..In one embodiment of a method according to the invention is separated the martensite phase at each point of said strip by heating ~ the material at the point to the current temperature by means of a Homes-ir along the lanes directable heat source or reflector and through a hardening that occurs after the heat source has moved from the point concerned by means of rapid heat dissipation at the point omr ïgivende materialet. In the figure, 11 indicates a space in which the insert of the martensite lanes is performed. The said space is assumed to be below vacuum in the case of electron beam source ..

Uppfinningen är inte begränsad till den i ovanstående såsom exempel visade utföringsformen utan kan underkastas modifikationer inom ramen för efterföljande patentkrav.The invention is not limited to that of the above by way of example shown embodiment but may be subjected to modifications within the scope of the appended claims.

Claims (5)

7709768-1 PATENTKRAV7709768-1 PATENT REQUIREMENTS 1. Stridsdel av stål utförd med förfragmentering av stridsde- len, k ä n n e t e c k n a d därav, att i stridsdelen är inför- v da smala martensitstràk, utefter vilka stridsdelen brister vid fsin söndersprängning. i1. Combat part made of steel with pre-fragmentation of the combat part, characterized in that narrow martensite strips are introduced into the combat part, along which the combat part ruptures during its disintegration. in 2. sätt att framställa den i kravet 1 angivna stridsdelen i stål för ernáende av förfragmentering av densamma, k ä n n e - t e c k n a t därav, att i stridsdelens material inordnas smala martensitstràk.2. a method of producing the fighting part specified in claim 1 in steel for obtaining pre-fragmentation thereof, characterized in that narrow martensite strips are arranged in the material of the fighting part. 3. Sätt enligt patentkravet 1, k ä n n e t e c k n a t där- av, att martensitfasen utskiljes i varje punkt (10) av nämnda stråk genom upphettning av materialet i punkten till aktuell tem- peratur medelst en längs stráken riktbar värmekälla (2) eller re- flektor (4) och genom en härdning som kommer till stånd efter värmekällans förflyttning från berörd punkt (10) medelst snabb värmeavledning i det punkten omgivande materialet i stridsdelen.3. A method according to claim 1, characterized in that the martensite phase is separated at each point (10) of said strip by heating the material at the point to the current temperature by means of a heat source (2) or reflector directed along the strip. (4) and by a hardening which takes place after the heat source has moved from the point (10) concerned by means of rapid heat dissipation in the material surrounding the point in the combat part. 4. Sätt enligt patentkravet 2 eller 3, k ä n n e t e c k - n a t därav, att en väremkälla som alstrar en laserstråle (3) eller elektronstràle föres utefter stráken så att ett förutbe- stämt geometriskt mönster erhålles. S4. A method according to claim 2 or 3, characterized in that a heat source which generates a laser beam (3) or electron beam is passed along the beam so that a predetermined geometric pattern is obtained. S 5. Sätt enligt patentkravet 4, k ä n n e t e c k n a t därav, att i fallet med en värmekälla som alstrar en laserstràle strids- delen roteras i förhållande till en laserstràlen reflekterande vippbar reflektor (4). ANFÖRDA PUBLIKATIONER: . '__'_"'__ï"_"_5. A method according to claim 4, characterized in that in the case of a heat source generating a laser beam the combat part is rotated relative to a laser beam reflecting tiltable reflector (4). PROMISED PUBLICATIONS:. '__'_ "' __ ï" _ "_
SE7709768A 1977-08-31 1977-08-31 BATTLE PART OF STEEL AND WAY TO MANUFACTURE IT SE407695B (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE7709768A SE407695B (en) 1977-08-31 1977-08-31 BATTLE PART OF STEEL AND WAY TO MANUFACTURE IT
NL7808695A NL7808695A (en) 1977-08-31 1978-08-23 PROJECTION HEAD.
IT50860/78A IT1109363B (en) 1977-08-31 1978-08-25 IMPROVEMENT IN WAR HEADS AND RELATED, MANUFACTURING PROCEDURE
DE19782837638 DE2837638A1 (en) 1977-08-31 1978-08-29 FOR THE FRAGMENT OF PRE-TREATED BATTLEHEAD AND THE PROCESS FOR ITS MANUFACTURING
FR7825052A FR2402003A1 (en) 1977-08-31 1978-08-30 DEVICE AND METHOD FOR TREATING AN EXPLOSIVE HEAD TO ENSURE FRAGMENTATION
NO782955A NO782955L (en) 1977-08-31 1978-08-30 FIGHTING HEAD DEVICE AND PROCEDURE FOR PRODUCING THE SAME
GB7835115A GB2013842A (en) 1977-08-31 1978-08-31 Fragmentation warhead

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7709768A SE407695B (en) 1977-08-31 1977-08-31 BATTLE PART OF STEEL AND WAY TO MANUFACTURE IT

Publications (2)

Publication Number Publication Date
SE7709768L SE7709768L (en) 1979-03-01
SE407695B true SE407695B (en) 1979-04-09

Family

ID=20332135

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7709768A SE407695B (en) 1977-08-31 1977-08-31 BATTLE PART OF STEEL AND WAY TO MANUFACTURE IT

Country Status (7)

Country Link
DE (1) DE2837638A1 (en)
FR (1) FR2402003A1 (en)
GB (1) GB2013842A (en)
IT (1) IT1109363B (en)
NL (1) NL7808695A (en)
NO (1) NO782955L (en)
SE (1) SE407695B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111725A1 (en) * 1981-03-25 1982-10-07 Rheinmetall GmbH, 4000 Düsseldorf IGNITIONLESS RINGWING BULLET
FR2566691B1 (en) * 1984-06-29 1986-11-07 Brandt Armements METHOD FOR MACHINING A PREFRAGMENTATION NETWORK AND CHIP GENERATOR FOR EXPLOSIVE MILITARY LOAD
BR8807247A (en) * 1987-10-14 1989-10-31 Karl Merz FRAGMENTABLE INVOLVEMENT FOR EXPLOSIVE ENGINE AND PROCESS FOR ITS MANUFACTURING
FR2637065B1 (en) * 1988-09-02 1993-10-15 Thomson Brandt Armements AMMUNITION PROTECTIVE COVER COMPRISING MEANS FOR CUTTING IT
DE19960180B4 (en) * 1999-12-14 2006-03-09 Rheinmetall W & M Gmbh Method for producing an explosive projectile
DE102005021982B4 (en) * 2005-05-12 2007-04-05 Rheinmetall Waffe Munition Gmbh Process for the preparation of a penetrator
DE102007001998A1 (en) 2007-01-08 2008-07-10 Rheinmetall Waffe Munition Gmbh explosive projectile
DE102008005098A1 (en) * 2008-01-18 2009-07-23 Diehl Bgt Defence Gmbh & Co. Kg Cover for projectile i.e. large calibrated ammunition of mortar shell, has pre-fragmentation unit to produce splinter, where linear structural change of defined depth of material of cover reduces tensile strength in zone upto certain depth
DE102010061272B3 (en) * 2010-12-15 2013-04-25 Krauss-Maffei Wegmann Gmbh & Co. Kg Projectile casing for an explosive projectile and method for treating a projectile casing
US9360284B1 (en) 2013-03-15 2016-06-07 Vista Outdoor Operations Llc Manufacturing process to produce metalurgically programmed terminal performance projectiles
US11454480B1 (en) 2019-06-12 2022-09-27 Corvid Technologies LLC Methods for forming munitions casings and casings and munitions formed thereby
CN112556512B (en) * 2020-11-12 2023-04-18 中国兵器装备研究院 Manufacturing method of precontrol fragment and precontrol fragment

Also Published As

Publication number Publication date
SE7709768L (en) 1979-03-01
DE2837638A1 (en) 1979-03-08
FR2402003A1 (en) 1979-03-30
NO782955L (en) 1979-03-01
IT7850860A0 (en) 1978-08-25
IT1109363B (en) 1985-12-16
GB2013842A (en) 1979-08-15
NL7808695A (en) 1979-03-02

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