What is a conical twin screw barrel?

It is a tapered twin-bore extrusion component in which two conical screws rotate inside a matching conical barrel. The taper compresses and plasticizes material over a short length, making the conical screw barrel ideal for PVC pipe, profile, sheet and WPC extrusion.

What materials is it best used for?

Rigid PVC (pipe, profile, board and sheet), wood-plastic composite, PE-based profiles and resin tile, plus PVC pelletizing. It handles low-bulk-density dry-blend powders especially well thanks to its large feed-end intake.

How is it different from a parallel twin screw barrel?

A conical barrel tapers and builds high compression with gentle shear, suiting direct PVC/WPC extrusion. A parallel twin screw barrel keeps a constant diameter and higher shear, which suits compounding, masterbatch and very high-filler formulations.

What is the typical clearance between screw and barrel?

Clearance is the small gap between the flight tip and the bore wall. It is set tight and accurate on a new part; as it opens up from wear, output and pressure drop. Measuring it periodically is the clearest way to track barrel wear.

How do I install a conical twin screw barrel?

Power down and lock out, clean the mating faces, mount and align so the screws turn freely, wire each heater zone and thermocouple correctly, then bring the barrel up to temperature slowly and soak it before starting the screws.

What causes wear in conical twin screw barrels?

Mainly abrasive fillers such as calcium carbonate, wood fiber and glass, made worse by corrosion from PVC processing, poor maintenance and under-specified hardness. A deeper bimetallic or tungsten-carbide layer resists all three far better.

How often should the barrel be inspected or replaced?

Do visual and purge checks monthly and measure clearance quarterly. Replacement timing depends on filler load and run hours — track the wear trend rather than waiting for a failure, and rebuild or replace once clearance moves past spec.

How do I choose the right size for my extrusion line?

Match the diameter ratio and length to your extruder model and target output, then pick a surface treatment based on how abrasive your formulation is. Send a drawing or a sample with key dimensions so the barrel is an exact fit, not an approximation.

Foosto Twin Twin Conical: Hagaha Dhamaystiran ee Tilmaamaha, Codsiyada & Xulashada

2026-08-05 0 Fariin ii dhaaf

By theKooxda Farsamada ee Nanhaiya- Screw & Barrel Engineering, Zhoushan · Dib loo eegay saxnaanta warshadda · ~ 10 daqiiqo akhri

Jawaab degdeg ah

Fuusto mataano toniile ah waa qayb la duuban yahay, oo mataano-dhal ah oo ka kooban laba boolal oo toosan oo ku wareegaya gudaha foosto toosan oo siman. Joometry-ka duuban wuxuu bixiyaa quudin xooggan iyo cadaadis sare oo dherer gaaban ah, waana sababtaasfur mataano conical iyo foostowaa doorashada caadiga ah ee tuubada PVC, profile, xaashida iyo extrusion WPC.

Haddii aad maamusho PVC ama line alwaax-caag ah, waafoosto fur mataano ahwaa mid ka mid ah qaybaha sida tooska ah u go'aamiya wax soo saarkaaga, tayada dhalaalaysa iyo kharashka socodsiinta. Dooro cabbir khaldan, shay ama nadiifin waxaadna ku bixinaysaa xidhashada, qashinka iyo wakhtiga dhimista. Hagahan waxa uu daboolayaa sida ay u shaqayso foostada koodhka leh, waxyaabaha muhiimka ah marka aad iibsanayso, sida ay uga duwan tahaybarmiil mataano isku mid ah, iyo sida loo doorto, loo rakibo oo loo ilaaliyo mid - laga soo qoray dhinaca warshadda mashiinnada qaybahan maalin kasta.

Conical twin screw barrel manufactured by Nanhaiya — Isku-xidhka mataanaha ah ee koonka ah iyo foosto - boodhadhka duuban waxay siinayaan cadaadis dherer gaaban oo ku habboon PVC kulaylka.

Sida foosto mataano ah oo mataano ah u shaqeyso

In afur-fure mataano ah, laba boolal ayaa isku dhinac fadhiya xagal yar, oo ballaaran oo ku yaala dhamaadka quudinta iyo cidhiidhi dhamaadka dhimashada. Foostada ayaa u dhufatey in ay is waafajiso. Marka ay alaabta ceeriin ka guurto aagga quudinta dhexroorka-ballaaran una gudbayo aagga cabbiraadda dhexroorka-yar, mugga sii yaraanaya ayaa cadaadinaya oo balaastigiyay halka duullimaadyada is-dhex-galka ahi ay gudbinayaan oo ay isku daraan. Sababtoo ah labada boolal ayaa isbedbeddela oo si buuxda isu dhexgaliya, furka mataanaha ah ee conical iyo foosto waxay u dhaqmaan sida bamka barakicinta togan - wax soo saarka joogtada ah ee hooseeya, xiirid jilicsan, kaas oo ilaaliya polymers-kuleylka sida PVC.

Nidaamku wuxuu u kala baxaa saddex marxaladood:

Quudinta & gudbinta- Dhexroorka quudinta-dhamaadka weyn wuxuu siinayaa mugga qaadashada weyn, sidaas darteed isku-darka budada ah iyo walxaha cufnaanta yar-yar (sida PVC-qalalan-qallalan) ayaa loo jiidayaa si la isku halleyn karo iyada oo aan la isku dhejin.
Cadaadiska & balaastiga- taper-ku wuxuu yareeyaa mugga kanaalka dhererka, isku-buufinta walxaha, kaxaynta hawada oo ku dhalaalisa kuleylka isku dhafan iyo shaqada farsamada.
Cabbiraadda & daadinta- Aagga cabbiraadda cidhiidhiga ah waxay dhistaa cadaadis deggan waxayna riixdaa lebis, dhalaalid isku mid ah iyada oo loo marayo dhimashada iyada oo la xakameynayo.

Foostada waxay qabataa in ka badan guriga boolal. Waxay sidataa kuleyliyaha iyo aagagga qaboojinta ee ku haya marxalad kasta heerkulka saxda ah. Fuusto Nanhaiya waxay isticmaashaa kuleylinta iyo qaboojinta aaga badan - sida caadiga ah quudinta, isku-buufinta iyo aagagga isku-dhafka ah - oo leh hawo-mareen ikhtiyaari ah si ay u soo jiidato qoyaanka iyo kacsanaanta dhalaalka, taas oo muhiim u ah buuxinta iyo xeryahooda hygroscopic.

Tilmaamaha muhiimka ah si aad u hubiso ka hor intaadan iibsan

Laba foosto oo toosan ayaa isku mid u ekaan kara oo si aad u kala duwan ayay u shaqeeyaan. Kuwani waa qeexitaannada go'aaminaya ku habboonaanta, soo saarista iyo xidhashada nolosha - lambarrada waa inaad xaqiijisaa xigasho kasta.

Shayga gaarka ah	Maxaa looga jeedaa	Maxay muhiim u tahay
Saamiga dhexroorka	Dhexroorka quudinta-dhamaadka/dhamaadka dhiman, tusaale. 45/90, 50/105, 55/110, 65/132, 80/156, 92/188 mm	Dejiya fasalka mishiinada iyo guutada wax soo saarka - waa inay si sax ah u waafaqdo qaabka extruder-kaaga
Saamiga L/D	Dhererka farsamaynta waxtarka leh vs dhexroorka	Dhererka waxtarka leh ee dheer = waqti badan oo deggenaansho ah oo loogu talagalay fiyuus buuxa iyo degenaansho
Darajada alaabta	38CrMoAlA birta nitrided, W6Mo5Cr4V2, birta budada HIP, ama bimetallic	Dareewalada tooska ah waxay xidhaan nolosha iyo iska caabbinta daxalka ee ka dhanka ah xeryahooda la buuxiyay/PVC
Daaweynta dusha sare iyo adkaanta	Nitriding, plating chrome, bimetallic alloy ama buufinta tungsten-carbide	Nanhaiya waxay buufisaa lakabka daawaha tungsten-ka lagu daray si loo gaaro62 HRCgudaha foosto vs 58 HRC caadiga ah
qoto dheer lakabka Alloy	Dhumucda lakabka gudaha u adkaysta	Lakabka bimetallic ee Nanhaiya waa 2.5-3 mm - lakabka qoto dheer waxaa loola jeedaa daaqad adeeg la isticmaali karo
Fasaxyada sharoobada/fuusto	Farqiga u dhexeeya caarada duulimaadka iyo gidaarka daloolka leh	Aad u weyn = cadaadis la'aan iyo wax soo saar hooseeya; cidhiidhi, farqiga saxda ah ayaa ilaalinaya waxtarka sare
Dulqaad / toosnaan	Makiinada saxda ah ee qaybta dhammaatay	Nanhaiya waxay haysataa foosto mataano ah oo mataano ah ilaa ±0.0005 mm si joogto ah, taam ah oo la soo celin karo
Awoodda wax-soo-saarka (kg/saacaddii)	Waxa lagu qiimeeyay cabbirka	Lambarka iibsadaha khadka hoose - ku dhig xawaaraha khadkaaga iyo badeecadaada

Ogeysiis guud ee warshadaha:Naqshadaynta cabbirka koonka sida 45/90 ama 65/132 (quudinta / dhexroorka dhinta ee mm) ayaa ku badan guud ahaan mashiinnada koonaha ah ee nooca SJZ, sidaa darteed foosto lagu cayimay habkan ayaa inta badan la barbar dhigi kara duuliye jira. Had iyo jeer ka xaqiiji sawir ama muunad ka hor intaadan dalban. Waxaad arki kartaa cabbirrada caadiga ah annagafoosto fur mataano ahbogga.

Konical vs barmiil foosto fur mataano ah

Su'aasha ugu badan ee iibsadayaashu way waydiiyaan waa haddii ay u baahan yihiin koobi ama abarmiil mataano isku mid ah. Labaduba waa mataano-screw, labadaba intermesh - laakiin joomatarigu wuxuu ku habboon yahay shaqooyin kala duwan. Marka la soo koobo: conical heer sare ah si toos ah PVC/WPC extrusion ee tuubada, profile iyo guddiga; isbarbar yaac ayaa ka xoog badan isku-darka, masterbatch iyo qaabaynta aadka u sarreeya.

Qodob	Foosto fur mataano ah	Barmiil mataano ah oo isbarbar socda
Dhaqanka quudinta	Furitaanka quudinta weyn - qaadashada ka fiican ee budada cufnaanta hoose	Quudinta labbiska badan ee isku-darka iyo quudinta pellet
Cadaadwaa	Cadaadis sare oo lagu dhisay joomatari duuban	Cadaadis joogto ah oo badan oo ay weheliso dhexroor go'an
Kuleyl / xiirid	Dabeecad, farsamaynta la xakameeyey - waxay u fiican tahay PVC kulaylka xasaasiga ah	Xiritaanka sare - waxay u fiican tahay isku darka degdega ah iyo kala firdhinta
Isticmaalka caadiga ah	Tuubbada PVC, profile, xaashida, WPC, foornada xabagta	Masterbatch, isku-darka, CaCO₃-sare iyo shaqo dhalo ka buuxo
Dayactirka	Xirashada iyo nadiifinta waxay u baahan yihiin la socosho dhow marka la duubo	Inta badan fududaynta jaangooyooyinka joomatari iyo beddelka curiyaha

Xeerka faa'iidada leh ee suulka: haddii badeecadaada dhamaadka ahwaaextrudate (tuubo ama looxa si toos ah u dhinta), foosto fur mataano conical sida caadiga ah waa qalabka saxda ah. Haddii aad samaynayso pellets ama aad kala firdhinayso xirmo wax lagu daro ah oo dalbanaya, eeg foosto mataano ah oo isbar-bar socda - gaar ahaan nooca wareega ee loogu talagalay rarka karbohaydraytyada aadka u sarreeya. Ma hubtid midka ku habboon khadkaaga? Ourhal mar, safafka toosan iyo kuwa isbarbar socda ayaa dhamaantood lagu muujiyey dushabogga alaabta.

Codsiyada caadiga ah

Sababtoo ah waxay isku daraysaa quudin xoog leh, cadaadis sare iyo xiirid dabacsan, furka mataanaha conical iyo foostada waa faraska shaqada ee adag-PVC iyo extrusion alwaax-caag ah. Waxay si fiican ugu shaqeysaa:

Dhuumaha PVC- Biyo-helid, biyo-mareen iyo tuubo-mareennada laga helo PVC-ga qalalan.
Muuqaalka PVC- muraayadaha daaqada iyo albaabka, xidhida geesaha iyo jar.
Looxa PVC & xaashida- looxa xumbo, xaashida u eg marmar iyo looxa xumbo-free (eeg ourLooxa PVC koonka oo foosto fur mataano ah).
WPC (isku dar alwaax-caag ah)- sagxinta, darbiyada gidaarada iyo profiles ka xeryahooda alwaax ka buuxo.
Alaabooyinka PE-ku-saleysan iyo dhoobada-resin-ka- oo ay ku jiraan saqafka saqafka ah ee resin-ka leh iyo muuqaalada PE-buuxsan.
Pelletizing PVC- isku darka PVC-engegan oo u beddelaya granules si loogu isticmaalo hoosta.

PVC board conical twin screw barrel for foam and marble sheet extrusion — Foosto mataano ah oo mataano ah oo loo habeeyey looxa PVC iyo xuubka-xumbada.

Sida loo doorto foosto mataano ah oo toosan oo toosan

Xulashadu waxay hoos ugu dhacdaa saddex su'aalood: waa maxay maaddooyinka aad wado, maxay tahay wax soo saarka aad u baahan tahay, iyo intee in le'eg ayaa habayntaadu u leedahay? Isticmaal shaxanka hoose meel bilow ah, ka dibna xaqiiji cabbirka saxda ah ee mashiinkaaga.

Qalabkaaga / baahidaada	qaabeynta la soo jeediyay	Dusha sare/doorashada alaabta
Dhuumaha PVC ee adag & profile	Joometry conical-ka caadiga ah oo lagu qiyaaso dabakhiyahaaga (tusaale 55/110, 65/132)	Nitrided 38CrMoAlA ee nadiifka ah, buuxinta hoose ee PVC
PVC + buuxinta CaCO₃ sare	Conical leh aagga xirashada la xoojiyay, ama kor u kac si isbar-bar-rogid ah	Lakabka bimetallic / tungsten-carbide (62 HRC) ee naaxinta
WPC / xeryahooda alwaax-fiber	Conical leh hawo xoog leh oo xidho ilaalin	Bimetallic — Fiber alwaax + buuxiyeyaashu aad bay u xoqaan
Looxa xumbo PVC / xaashida	Conical loo habeeyey heerkulka dhalaalka la xakameeyey iyo cadaadis deggan	Nitrided ama bimetallic iyadoo ku xiran heerka buuxinta
Wax soo saar sare oo isla raad la mid ah	Saamiga dhexroorka weyn iyo/ama dherer waxtar leh oo dheer	Iswaafaji adkaanta si aad u shaqeyso saacadaha iyo culeyska buuxinta

Jawaabtu si kastaba ha ahaatee, tillaabada kaliya ee ugu muhiimsan ayaa ah in foosto la is waafajiyo mashiinkaaga jira. Qaybaha koofiyadaha ah ayaa si wax ku ool ah u caado u ah qulqulaha ay ku dhex ordaan, sidaas darteed sawir - ama muunad leh cabbirrada muhiimka ah (quudinta / dhexroorka quudinta, masaafada dhexe, dhererka guud iyo faahfaahinta flange) - waxay noo ogolaaneysaa inaan soo xiganno bedel sax ah oo ku habboon halkii aan ka ahaan lahaa qayb "ku dhow". Haddii aad u baahan tahay xariiqda oo dhan halkii aad ka heli lahayd qaybta, waxaanu sidoo kale dhisaynaamashiinada extruder dhamaystiran.

Aasaaska rakibaadda iyo fiilooyinka

Foosto sax ah waxay fulisaa kaliya haddii lagu rakibay labajibbaaran, nadiif ah oo si sax ah loo kululeeyay. Tallaabooyinka hoose waa dulmar guud - had iyo jeer raac buug-gacmeedka mashiinkaaga dhisaha iyo habraacyada qufulka.

Dami oo qufulGo'doomi darawalka iyo dhammaan kuleyliyeyaasha ka hor inta aadan saarin foosto hore. Xaqiiji eber tamarta ka hor inta aanad bilaabin.
Nadiifi wejiyada lammaanaha.Ka saar daboolka duugga ah, kaarboonka iyo burooyinka garabka iyo meelaynta wejiyada si ay kuraasta foosto cusub u fadhiistaan iyada oo aan qalloocin.
Dul oo toosi.Ku dheji foostada koonka ah ee sanduuqa-geeska/guryaha quudinta, hubinta xoogga saarista iyo in boolaluhu ay si xor ah gacanta ugu rogaan ka hor inta aan korontada la isticmaalin.
Silig aagagga kuleyliyaha.Dib ugu xidh kuleyliyeyaasha band iyo qaboojinta aag kasta ( quudin → cadaadis → mitir), oo ku dheji heerkulbeeg kasta kanaalka saxda ah si aag uusan u noqon mid isku xiran.
Deji muuqaal qoyntaSi tartiib ah u soo qaad foostada heerkulka oo u daa in ay qooyso birta oo dhalaaliso siman ka hor inta aanad bilaabin boolal - bilaabashada qabowgu waxay halis u tahay waxyeelo.

Tilmaamaha aagga kuleyliyaha:Aagga quudinta ha ahaado mid qabow oo kor u qaad heerkulka xagga dhimashada. Aagagga aan sinnayn ama aan si khaldan loo samayn ayaa ah mid ka mid ah sababaha ugu badan ee kor u kaca iyo xariijimaha madow - waxay mudan yihiin in laba jeer la hubiyo ka dib isbeddel kasta oo foosto ah.

Ciladaynta iyo xidhashada

Inta badan dhibaatooyinka foostada konical-ka ah waxay isu sheegaan inay yihiin wax soo saar aan degganayn, kulayl badan ama alaab hoos u dhacday. Isticmaal shaxdan si aad si dhakhso ah uga guurto calaamada una aad sababto inay hagaajiso.

Calaamadaha	Sababaha laga yaabaa	Hagaaji
Wax soo saarku wuu is beddelaa / kor u kaca	Quudi iswaafaq la'aanta, duullimaadyada xiran, ama socodka heerkulka	Hubi quudinta, xaqiiji heerkulka aaga, cabir furaha/fustada nadiifinta
Kulayl xad dhaaf ah	Isku dheelitir la'aanta kuleyliyaha, khilaaf xad dhaaf ah, ama qaboojinta xanniban	Kormeer aag kasta iyo wareegga qaboojinta; dib u samee heerkulbeegyada
balaastiig liidata	Qalab habaynta furka ama foosto duugowday	Xaqiiji qaabeynta; Hubi nadiifinta balaartay ee xidhashada
Khadadka madow / xariijin	Dhibco dhintay oo haysta walxo la xushay, ama dhibco dhibco ah	Si fiican u nadiifi oo nadiifi; baadh cidhifyada oo dusha maroojiye
Xiro xad dhaaf ah/dhakhso leh	Buuxiyaha xoqan, dayactirka liidata, ama adkaanta si gaar ah	Kor loogu qaado foosto bimetallic / tungsten-carbide ah; adkayn ilaalinta

Xiritaanku waa caadi - ujeedadu waa in laga dhigo mid gaabis ah oo la saadaalin karo. Buuxiyeyaasha abrasive (CaCO₃, fiber alwaax, galaas) ayaa si degdeg ah u weeraraya boodhka iyo duullimaadyada, taas oo ah sababta dhabta ah ee lakabka gudaha ee qoto dheer, adagi uu isagu bixiyo. Dusha 62 HRC tungsten-ku-dartay waxay si fudud uga dheertahay xeryahooda marka loo eego heerka 58 HRC ee dhammayn, isaga oo kala bixinaya inta u dhaxaysa dib-u-dhiska.

Liiska hubinta dayactirka

Jeegaga gaaban, joogtada ah ayaa ka hortagaya guuldarrooyinka qaaliga ah. Ku dhis kuwan jadwalkaaga caadiga ah:

dhexda	Hubi	Ficil
Isbedel kasta	Heerkulka aagga & amps	Akhriska diiwaanka; baaro wax kasta oo ka leexday salka
Todobaadle	dhalaali tayada & dusha sare	U fiirso xariijimo cusub, jel ama isbeddel wax soo saar
Bishii	Nadiifinta & jeegareynta indhashareerta	Nadiifi meelaha dhintay; raadi dhibcaha ama midabka
Saddexdii biloodba mar	Fasaxyada sharoobada/fuusto	Cabbir farqiga; barbar dhig si gaar ah si loola socdo heerka xidhashada
Sida loo baahdo	Kuleyliyaha & hufnaanta heerkulbeegga	Beddel xargaha/dareemaha fashilantay ka hor inta aysan keenin wax soo saar xun

Su'aalaha soo noqnoqda

Waa maxay foosto mataano ah oo koone ah?

Waa qayb ka samaysan mataano-boore oo duuban oo ay laba boolal toona ku wareegaan gudaha foostada toonta ah Taper-ku waxa uu isku cadaadiyaa oo balaastig ka dhigayaa wax ka badan dherer gaaban, taas oo ka dhigaysa foostada furka koonka ah ee ku habboon tuubada PVC, profile, xaashida iyo extrusion WPC.

Waa maxay agabka sida ugu wanaagsan loo isticmaalo?

PVC adag (tuubo, profile, looxa iyo xaashida), alwaax-caag isku jira, muuqaalada PE-ku salaysan iyo foornada xabagta, oo lagu daray pelletizing PVC. Waxa ay gacanta ku haysaa budo qallalan oo isku dhafan oo cufan-yar, gaar ahaan waxa ay ugu mahad-naqaysaa quudinteeda ballaadhan.

Sidee ayay uga duwan tahay barmiil mataano ah oo isbarbar socda?

Maqaar foosto ah oo koonical ah waxayna dhistaa cadaadis sare oo leh xiirid jilicsan, oo ku habboon sii-baxa tooska ah ee PVC/WPC. Abarmiil mataano isku mid ahwuxuu hayaa dhexroor joogto ah iyo xiirid sare, kaas oo ku habboon isku-darka, masterbatch iyo hababka buuxinta aadka u sarreeya.

Waa maxay nadiifinta caadiga ah ee u dhaxaysa boolal iyo foosto?

Nadiifintu waa faraqa yar ee u dhexeeya caarada duulimaadka iyo gidaarka daloolka leh. Waxaa lagu dhejiyaa si adag oo sax ah qayb cusub; marka ay ka furto xirashada, wax soo saarka iyo hoos u dhaca cadaadiska. Cabbiraadda xilliyada qaarkood waa habka ugu cad ee lagu ogaan karo xirashada foosto.

Sideen u rakibaa foosto mataano ah oo koonka ah?

Hoos u dami oo xidh, nadiifi wejiyada lammaanaha, dheji oo toosi si ay boolaluhu u noqdaan si xor ah, silig aag kasta kuleyliyaha iyo kulaylka si sax ah, ka dibna foosto ilaa heerkul ah si tartiib ah u qoyso ka hor inta aanad bilaabin boolal.

Maxaa sababa xirashada fuustooyin mataano ah oo mataano ah?

Inta badan kuwa wax-buuxinaya sida kaalshiyam carbonate, fiber alwaax iyo dhalo, waxaa ka sii daray daxalka ka yimaadda farsamaynta PVC, dayactirka liidata iyo adkaanta aan la cayimin. Lakabka bimetallic ama tungsten-carbide ee qoto dheer ayaa ka hortagaya dhammaan saddexda aad uga sii wanaagsan.

Immisa jeer ayay tahay in foostada la baaro ama la beddelo?

Samee jeegaga aragga oo nadiifi bishiiba oo cabbir nadiifinta saddexdii biloodba mar. Wakhtiga beddelku wuxuu ku xiran yahay culeyska buuxinta iyo saacadaha socodsiinta - la soco isbeddelka xirashada halkii aad sugi lahayd guuldarro, oo dib u dhis ama beddel marka nadiifinta ay dhaafto faahfaahinta.

Sideen ku dooran karaa cabbirka saxda ah ee khadkayga extrusion?

Ku dhig cabbirka dhexroorka iyo dhererka qaabkaaga fidiyaha iyo wax soo saarka bartilmaameedka, ka dibna soo qaado daawaynta dusha sare oo ku salaysan sida uu u jajaban yahay qaabkaaga. U dir sawir ama muunad leh cabbiro muhiim ah si foosto ay u noqoto mid sax ah, ee ma aha qiyaas.

Ma u baahan tahay foosto mataano ah oo mataano ah oo ku habboon mashiinkaaga?

Noo soo dir sawirkaaga - ama muunad leh cabbirada muhiimka ah - iyo injineeradayadu waxay qeexi doonaan fur mataano toosan oo sax ah oo ku habboon qalabkaaga. Iyada oo la adeegsanayo nitriding-guriga, bimetallic iyo farsamaynta tungsten-carbide, waxaanu dhisnaa qaybo gaadha 62 HRC gudaha diilinta nolosha adeeg dheer.

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