{"id":13351,"date":"2026-10-20T02:03:37","date_gmt":"2026-10-20T02:03:37","guid":{"rendered":"https:\/\/www.vacuum-sintering.com\/tungsten-vacuum-furnace\/"},"modified":"2026-10-20T02:05:54","modified_gmt":"2026-10-20T02:05:54","slug":"tungsten-vakum-firini","status":"publish","type":"post","link":"https:\/\/www.vacuum-sintering.com\/tr\/tungsten-vacuum-furnace\/","title":{"rendered":"Tungsten ve Molibden Vakum F\u0131r\u0131nlar\u0131: Karbonsuz Is\u0131tma B\u00f6lgesi Se\u00e7imi"},"content":{"rendered":"

Tungsten vakum f\u0131r\u0131n\u0131, \u0131s\u0131tma elemanlar\u0131 ve radyasyon kalkanlar\u0131 grafit yerine tungstenden yap\u0131lm\u0131\u015f, so\u011fuk duvarl\u0131 bir vakum f\u0131r\u0131n\u0131d\u0131r; bu nedenle s\u0131cak b\u00f6lge y\u00fcke karbon katk\u0131s\u0131 yapmaz. Molibden vakum f\u0131r\u0131n\u0131 ise ayn\u0131 tamamen metal prensibini molibden elemanlar ve kalkanlarla uygular; bu da daha d\u00fc\u015f\u00fck bir s\u0131cakl\u0131k s\u0131n\u0131r\u0131, daha d\u00fc\u015f\u00fck bir fiyat ve i\u015flenen par\u00e7alar titanyum, zirkonyum veya samaryum-kobalt m\u0131knat\u0131s oldu\u011funda \u00e7ok daha az s\u00fcrpriz anlam\u0131na gelir.<\/p>\n

F\u0131r\u0131nlarla ilgili konu\u015fmalar\u0131n \u00e7o\u011fu s\u0131cakl\u0131kla ba\u015flar. Ancak y\u00fck karbona duyarl\u0131 oldu\u011funda bu yanl\u0131\u015f bir ilk sorudur. Do\u011fru ilk soru, s\u0131cak b\u00f6lgenin neyden yap\u0131ld\u0131\u011f\u0131d\u0131r, \u00e7\u00fcnk\u00fc yakla\u015f\u0131k 1000 \u00b0C'nin \u00fczerinde grafit s\u0131cak b\u00f6lge inert bir mobilya par\u00e7as\u0131 de\u011fildir; \u00f6l\u00e7\u00fclebilir bir CO, CO\u2082 ve hidrokarbon buhar bas\u0131nc\u0131na sahip bir karbon kayna\u011f\u0131d\u0131r ve par\u00e7alar\u0131n\u0131zdan santimetrelerce uzakta bulunur.<\/p>\n

\"Molibden<\/figure>\n

Is\u0131ya dayan\u0131kl\u0131 metalden yap\u0131lm\u0131\u015f bir s\u0131cak b\u00f6lgenin ger\u00e7ekte de\u011fi\u015ftirdi\u011fi \u015fey nedir?<\/h2>\n

Grafitin yerine tungsten veya molibden kullan\u0131ld\u0131\u011f\u0131nda \u00fc\u00e7 \u015fey de\u011fi\u015fir ve bunlardan sadece biri s\u0131cakl\u0131kla ilgilidir.<\/p>\n

Karbon kayna\u011f\u0131 ortadan kayboluyor.<\/strong> Sinterleme ve tavlama s\u0131cakl\u0131klar\u0131nda, ke\u00e7e, grafit \u0131s\u0131t\u0131c\u0131lar ve grafit ba\u011flant\u0131 elemanlar\u0131ndan gelen karbon, titanyum, zirkonyum, hafniyum, niyobyum, tantal ve ala\u015f\u0131mlar\u0131 taraf\u0131ndan emilerek tane s\u0131n\u0131rlar\u0131nda k\u0131r\u0131lgan karb\u00fcrler olu\u015fturabilir. Ayn\u0131 mekanizma nikel bazl\u0131 s\u00fcper ala\u015f\u0131mlar\u0131 da bozar ve p\u00fcsk\u00fcrtme hedeflerinde diren\u00e7 ve \u0131slatma davran\u0131\u015f\u0131nda bir de\u011fi\u015fiklik olarak ortaya \u00e7\u0131kar. Tamamen metal bir s\u0131cak b\u00f6lgede, elemanlar ve koruyucular refrakter metallerdir; emilecek karbon yoktur.<\/p>\n

Yal\u0131t\u0131m malzemesi su emmeyi durdurur.<\/strong> Grafit ke\u00e7e higroskopiktir. Fabrika havas\u0131na a\u00e7\u0131k b\u0131rak\u0131lm\u0131\u015f bir ke\u00e7e paketi, vakumland\u0131ktan sonra saatlerce nem salmaya devam eder ve art\u0131k gaz analizi, g\u00f6sterge makul bir de\u011fer g\u00f6sterdikten \u00e7ok sonra bile su ve CO varl\u0131\u011f\u0131n\u0131 ortaya koyar. Buna kar\u015f\u0131l\u0131k, metal radyasyon kalkanlar\u0131 levha \u015feklindedir; \u00e7ok daha az nem emerler ve f\u0131r\u0131nlanarak temizlenebilirler.<\/p>\n

Ar\u0131za t\u00fcrleri ba\u015fka yerlere kay\u0131yor.<\/strong> Art\u0131k ke\u00e7e kirlenmesi konusunda endi\u015felenmiyorsunuz; \u015fimdi oksijen, eleman k\u0131r\u0131lganl\u0131\u011f\u0131 ve ezilmi\u015f bir koruyucu paketin, yanm\u0131\u015f bir ke\u00e7e paketinden \u00e7ok daha fazla performans kayb\u0131na yol a\u00e7mas\u0131 ger\u00e7e\u011fi konusunda endi\u015feleniyorsunuz. Bu sayfan\u0131n geri kalan\u0131 bu konuyu ele al\u0131yor.<\/p>\n

Tungsten veya molibden s\u0131cak b\u00f6lgesi nas\u0131l \u00e7al\u0131\u015f\u0131r?<\/h2>\n

A\u015fama 1 \u2014 Hazne ve pompalama<\/h3>\n

Her iki platform da so\u011fuk duvarl\u0131, su ceketli odalard\u0131r. Bu f\u0131r\u0131nlar i\u00e7in belirtilen y\u00fcksek vakum de\u011feri \u2014 6,7\u00d710\u207b\u00b3 Pa \u2014 odan\u0131n tek ba\u015f\u0131na bir \u00f6zelli\u011fi de\u011fil, pompa paketinin bir de\u011feridir: bir dif\u00fczyon pompas\u0131 veya mekanik bir pompa ile desteklenen bir turbomolek\u00fcler pompa gerektirir. Tek ba\u015f\u0131na mekanik bir pompa kaba vakum aral\u0131\u011f\u0131na (1 Pa s\u0131n\u0131f\u0131) ula\u015f\u0131r ve art\u0131k oksijenin bask\u0131n risk oldu\u011fu refrakter metal i\u015fleme i\u00e7in yeterli de\u011fildir.<\/p>\n

S\u0131z\u0131nt\u0131 oran\u0131 ve y\u00fckten kaynaklanan gaz \u00e7\u0131k\u0131\u015f\u0131, bu rakam\u0131 g\u00f6r\u00fcp g\u00f6rmeyece\u011finizi belirler: temiz, kuru ve hafif y\u00fckl\u00fc bir hazne bu rakama ula\u015f\u0131r; ayn\u0131 hazne \u0131slak y\u00fck ve yetersiz flan\u015f s\u0131zd\u0131rmazl\u0131\u011f\u0131 ile bu rakama ula\u015famaz.<\/p>\n

A\u015fama 2 \u2014 Kalkan paketi<\/h3>\n

Ke\u00e7e yerine, s\u0131cak b\u00f6lge genellikle 0,2-0,5 mm kal\u0131nl\u0131\u011f\u0131nda, k\u00fc\u00e7\u00fck bo\u015fluklarla ayr\u0131lm\u0131\u015f \u00e7ok katmanl\u0131 molibden veya tungsten levha ile sar\u0131l\u0131r. Her katman radyasyonu y\u00fcke do\u011fru geri yans\u0131t\u0131r; en d\u0131\u015ftaki katman su ceketi s\u0131cakl\u0131\u011f\u0131na yak\u0131n kal\u0131r.<\/p>\n

\u0130ki sonu\u00e7 ortaya \u00e7\u0131kar. Birincisi, koruma ancak geometrisi kadar iyidir; e\u011frilmi\u015f veya kirlenmi\u015f bir koruma katman\u0131 veya bir \u0131s\u0131t\u0131c\u0131ya k\u0131sa devre yapm\u0131\u015f bir katman, d\u0131\u015f duvarda s\u0131cak bir nokta olarak ve her \u00e7al\u0131\u015ft\u0131rmada artan bir g\u00fc\u00e7 faturas\u0131 olarak kendini g\u00f6sterecektir. \u0130kincisi, tamamen metal bir paket, kal\u0131n ke\u00e7e bir pakete g\u00f6re daha y\u00fcksek \u0131s\u0131 kayb\u0131na sahiptir, bu nedenle ayn\u0131 hazne hacmi genellikle s\u0131cakl\u0131\u011f\u0131 korumak i\u00e7in daha fazla g\u00fc\u00e7 \u00e7eker. Bu, temizli\u011fin bedelidir ve herhangi bir toplam maliyet kar\u015f\u0131la\u015ft\u0131rmas\u0131nda a\u00e7\u0131k\u00e7a belirtilmeye de\u011ferdir.<\/p>\n

A\u015fama 3 \u2014 Elementler ve g\u00fc\u00e7 iletimi<\/h3>\n

Tungsten elemanlar, yal\u0131t\u0131ml\u0131 direkler \u00fczerinde, koruyucu kalkanlardan geni\u015f bir bo\u015fluk b\u0131rak\u0131larak \u00e7ubuk, levha veya a\u011f \u015feklinde tedarik edilir. Tungsten ve molibden, grafite k\u0131yasla d\u00fc\u015f\u00fck \u00f6zdiren\u00e7li, y\u00fcksek s\u0131cakl\u0131\u011fa dayan\u0131kl\u0131 metaller oldu\u011fundan, g\u00fc\u00e7 kayna\u011f\u0131 karakteristik olarak d\u00fc\u015f\u00fck voltajl\u0131, y\u00fcksek ak\u0131ml\u0131 olup, su so\u011futmal\u0131 bak\u0131r bara ve bir d\u00fc\u015f\u00fcr\u00fcc\u00fc transformat\u00f6r arac\u0131l\u0131\u011f\u0131yla beslenir.<\/p>\n

Bir eleman\u0131n \u00f6mr\u00fc \u00fc\u00e7 \u015feye ba\u011fl\u0131d\u0131r: yeniden kristalle\u015fme (bu da metali k\u0131r\u0131lgan hale getirir), oksijen sald\u0131r\u0131s\u0131 ve y\u00fck veya koruyucularla mekanik temas. Aylarca y\u00fcksek s\u0131cakl\u0131kta \u00e7al\u0131\u015fan bir tungsten eleman\u0131 b\u00fck\u00fclmez, \u00e7atlar. Kullan\u0131m prosed\u00fcrleri, g\u00fc\u00e7 kayna\u011f\u0131 tasar\u0131m\u0131 kadar \u00f6nemlidir.<\/p>\n

A\u015fama 4 \u2014 Atmosfer ve oksijen kontrol\u00fc<\/h3>\n

\u00c7o\u011fu saha ar\u0131zas\u0131n\u0131n kayna\u011f\u0131 bu a\u015famad\u0131r. Tungsten ve molibden vakum veya kuru indirgeyici bir atmosferle korunur ve oksijen ve su buhar\u0131 taraf\u0131ndan sald\u0131r\u0131ya u\u011frarlar. Yakla\u015f\u0131k 700-1000 \u00b0C'nin \u00fczerinde (bu oksitler i\u00e7in tipik), molibden ve tungsten, y\u00fczeyi korumak yerine terk eden u\u00e7ucu oksitler olu\u015fturur; sonu\u00e7 olarak incelmi\u015f bir eleman, kirlenmi\u015f bir y\u00fck ve asla tam olarak eski haline d\u00f6nmeyen bir vakum \u00f6l\u00e7er ortaya \u00e7\u0131kar.<\/p>\n

Uygulad\u0131\u011f\u0131m\u0131z pratik kurallar \u015funlard\u0131r: bu s\u0131cak b\u00f6lgelerde hava veya oksijen i\u00e7eren proses gaz\u0131 kullan\u0131lmaz; hidrojen kullan\u0131ld\u0131\u011f\u0131nda \u00e7i\u011f noktas\u0131 varsay\u0131lmaz, izlenir; kap\u0131 a\u00e7\u0131ld\u0131ktan sonra yap\u0131lan her i\u015flemde s\u0131z\u0131nt\u0131 testi yap\u0131l\u0131r; ve m\u00fc\u015fteri s\u0131cakl\u0131kta oksijen veya su salan bir malzeme \u00f6nerdi\u011finde y\u00fck kimyas\u0131 incelemesi yap\u0131l\u0131r.<\/p>\n

A\u015fama 5 \u2014 Termal profil ve so\u011futma<\/h3>\n

Yay\u0131nlanan s\u0131cakl\u0131k art\u0131\u015f aral\u0131\u011f\u0131, tungsten platformu i\u00e7in 1600 \u00b0C'nin alt\u0131nda 1\u201315 \u00b0C\/dk ve 1600 \u00b0C'nin \u00fczerinde 1\u201310 \u00b0C\/dk'd\u0131r; molibden platformu ise 1300 \u00b0C'lik tavan\u0131na kadar 1\u201315 \u00b0C\/dk h\u0131zla \u00e7al\u0131\u015f\u0131r. 1600 \u00b0C'nin \u00fczerindeki d\u00fc\u015f\u00fc\u015f, s\u0131rf muhafazakarl\u0131k olsun diye yap\u0131lmam\u0131\u015ft\u0131r; refrakter metal elemanlar\u0131 ve kalkanlar\u0131 tahrip eden \u015fey termal \u015foktur ve y\u00fck\u00fcn kendi termal gradyan\u0131 genellikle f\u0131r\u0131ndan \u00f6nce ger\u00e7ek s\u0131n\u0131r\u0131 belirler.<\/p>\n

S\u0131cakl\u0131k homojenli\u011fi, bir saatlik bekleme s\u00fcresinin ard\u0131ndan 1000 \u00b0C'de be\u015f noktada \u00f6l\u00e7\u00fclen de\u011ferlere g\u00f6re \u00b15 \u00b0C olarak belirtilmi\u015ftir. \u00c7ok b\u00f6lgeli kontrol, PLC ve PID d\u00f6ng\u00fclerine sahip end\u00fcstriyel bir PC ve iste\u011fe ba\u011fl\u0131 2 bar gazl\u0131 h\u0131zl\u0131 so\u011futma devresi, sistemi tamamlamaktad\u0131r.<\/p>\n

Temel parametreler<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parametre<\/th>\nGrafit s\u0131cak b\u00f6lge (GR)<\/th>\nTungsten s\u0131cak b\u00f6lge (W)<\/th>\nMolibden s\u0131cak b\u00f6lgesi (MO)<\/th>\n<\/tr>\n<\/thead>\n
Listelenen maksimum s\u0131cakl\u0131k<\/td>\n2000\/2400 \u00b0C<\/td>\n1800\/2000 \u00b0C<\/td>\n1000\/1300 \u00b0C<\/td>\n<\/tr>\n
Vakum (pompa paketine ba\u011fl\u0131)<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\n<\/tr>\n
Y\u00fckselme h\u0131z\u0131<\/td>\n1\u201315 \u00b0C\/dk (<1600); 1\u201310 \u00b0C\/dak (>1600)<\/td>\n1\u201315 \u00b0C\/dk (<1600); 1\u201310 \u00b0C\/dak (>1600)<\/td>\n1\u201315 \u00b0C\/dk (<1300)<\/td>\n<\/tr>\n
S\u0131cak b\u00f6lgedeki karbon kayna\u011f\u0131<\/td>\nEvet \u2014 ke\u00e7e, \u0131s\u0131t\u0131c\u0131lar, armat\u00fcrler<\/td>\nHi\u00e7biri<\/td>\nHi\u00e7biri<\/td>\n<\/tr>\n
Nem tutma<\/td>\nY\u00fcksek (higroskopik ke\u00e7e)<\/td>\nD\u00fc\u015f\u00fck<\/td>\nD\u00fc\u015f\u00fck<\/td>\n<\/tr>\n
Oksijen tolerans\u0131<\/td>\nIl\u0131man<\/td>\nD\u00fc\u015f\u00fck<\/td>\nD\u00fc\u015f\u00fck<\/td>\n<\/tr>\n
G\u00f6receli g\u00fc\u00e7 t\u00fcketimi<\/td>\nDaha d\u00fc\u015f\u00fck<\/td>\nDaha y\u00fcksek<\/td>\nDaha y\u00fcksek<\/td>\n<\/tr>\n
Mekanik sa\u011flaml\u0131k<\/td>\nY\u00fcksek<\/td>\nD\u00fc\u015f\u00fck (yeniden kristalle\u015ftirildi\u011finde k\u0131r\u0131lgan)<\/td>\nD\u00fc\u015f\u00fck-orta<\/td>\n<\/tr>\n
G\u00f6receli t\u00fcketim maliyeti<\/td>\nD\u00fc\u015f\u00fck<\/td>\nY\u00fcksek<\/td>\nIl\u0131man<\/td>\n<\/tr>\n
Tipik de\u011fi\u015ftirme aral\u0131\u011f\u0131<\/td>\nUzun<\/td>\nDaha k\u0131sa, oksijene ba\u011f\u0131ml\u0131<\/td>\nIl\u0131man<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Bu tabloyu okudu\u011funuzda, d\u00fcr\u00fcst\u00e7e \u00f6zetlemek gerekirse: Tungsten veya molibden \u0131s\u0131tma b\u00f6lgesini s\u0131cakl\u0131k i\u00e7in sat\u0131n almazs\u0131n\u0131z. Bunu, malzemeniz karbona tahamm\u00fcl edemedi\u011fi i\u00e7in veya 2000 \u00b0C'nin alt\u0131nda \u00e7al\u0131\u015fan bir i\u015flem i\u00e7in temiz, h\u0131zl\u0131 pompalamal\u0131, d\u00fc\u015f\u00fck gaz sal\u0131n\u0131ml\u0131 bir odaya ihtiyac\u0131n\u0131z oldu\u011fu i\u00e7in sat\u0131n al\u0131rs\u0131n\u0131z.<\/p>\n

\u00dcr\u00fcn yelpazemizdeki modeller<\/h2>\n

Tungsten s\u0131cak b\u00f6lge \u2014 V serisi W<\/h3>\n\n\n\n\n\n\n\n\n
Model<\/th>\nHazne (mm)<\/th>\nMaksimum s\u0131cakl\u0131k<\/th>\nEn \u00fcst\u00fcn vakum<\/th>\nRampa<\/th>\n<\/tr>\n<\/thead>\n
V3W20<\/td>\n300\u00d7300\u00d7400<\/td>\n1800\/2000 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\n1\u201315 (<1600) \/ 1\u201310 (>1600) \u00b0C\/dak<\/td>\n<\/tr>\n
V4W20<\/td>\n400\u00d7400\u00d7600<\/td>\n1800\/2000 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\nAyn\u0131<\/td>\n<\/tr>\n
V5W20<\/td>\n500\u00d7500\u00d7700<\/td>\n1800\/2000 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\nAyn\u0131<\/td>\n<\/tr>\n
V6W20<\/td>\n600\u00d7600\u00d7900<\/td>\n1800\/2000 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\nAyn\u0131<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

D\u00f6rt modelin tamam\u0131, 1000 \u00b0C'de \u00b15 \u00b0C'lik be\u015f noktal\u0131 homojenlik, \u00e7ok b\u00f6lgeli PID kontrol\u00fc ve iste\u011fe ba\u011fl\u0131 2 bar h\u0131zl\u0131 so\u011futma devresi \u00f6zelliklerini payla\u015f\u0131yor.<\/p>\n

Molibden s\u0131cak b\u00f6lgesi \u2014 V serisi MO<\/h3>\n\n\n\n\n\n\n\n\n\n
Model<\/th>\nHazne (mm)<\/th>\nMaksimum s\u0131cakl\u0131k<\/th>\nEn \u00fcst\u00fcn vakum<\/th>\nRampa<\/th>\n<\/tr>\n<\/thead>\n
V4M013<\/td>\n400\u00d7400\u00d7600<\/td>\n1000\/1300 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\n1\u201315 \u00b0C\/dk (<1300)<\/td>\n<\/tr>\n
V6M013<\/td>\n600\u00d7600\u00d7900<\/td>\n1000\/1300 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\nAyn\u0131<\/td>\n<\/tr>\n
V7M013<\/td>\n700\u00d7700\u00d71000<\/td>\n1000\/1300 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\nAyn\u0131<\/td>\n<\/tr>\n
V8M013<\/td>\n800\u00d7800\u00d71200<\/td>\n1000\/1300 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\nAyn\u0131<\/td>\n<\/tr>\n
V10M013<\/td>\n1000\u00d71000\u00d71400<\/td>\n1000\/1300 \u00b0C<\/td>\n6,7\u00d710\u207b\u00b3 Pa<\/td>\nAyn\u0131<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tungsten, molibden, grafit ve ind\u00fcksiyon kar\u015f\u0131la\u015ft\u0131rmas\u0131<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Kriter<\/th>\nGrafit (GR)<\/th>\nTungsten (W)<\/th>\nMolibden (MO)<\/th>\n\u0130nd\u00fcksiyon grafiti (CO)<\/th>\n<\/tr>\n<\/thead>\n
S\u0131cakl\u0131k tavan\u0131<\/td>\nEn y\u00fcksek<\/td>\nY\u00fcksek<\/td>\nIl\u0131man<\/td>\nY\u00fcksek<\/td>\n<\/tr>\n
Karbon al\u0131m riski<\/td>\nSunmak<\/td>\nMevcut olmayan<\/td>\nMevcut olmayan<\/td>\nSunmak<\/td>\n<\/tr>\n
Oksijen duyarl\u0131l\u0131\u011f\u0131<\/td>\nDaha d\u00fc\u015f\u00fck<\/td>\nY\u00fcksek<\/td>\nY\u00fcksek<\/td>\nDaha d\u00fc\u015f\u00fck<\/td>\n<\/tr>\n
Rampalama kapasitesi<\/td>\nStandart<\/td>\nStandart<\/td>\nStandart<\/td>\nH\u0131zl\u0131<\/td>\n<\/tr>\n
Vakum s\u0131n\u0131f\u0131<\/td>\nY\u00fcksek vakum<\/td>\nY\u00fcksek vakum<\/td>\nY\u00fcksek vakum<\/td>\nKaba\/orta (5 Pa)<\/td>\n<\/tr>\n
En uygun olan<\/td>\nC\/C, grafit \u00fcr\u00fcnleri, karb\u00fcr, y\u00fcksek s\u0131cakl\u0131kta seramikler<\/td>\nIs\u0131ya dayan\u0131kl\u0131 metaller, titanyum, karbona duyarl\u0131 seramikler<\/td>\nParlak tavlama, manyetik malzemeler, contalar, hidrojen servisi<\/td>\nH\u0131zl\u0131 \u00e7evrim gerektiren b\u00fcy\u00fck grafit y\u00fckleri<\/td>\n<\/tr>\n
En zay\u0131f nokta<\/td>\nKarbon ve nem<\/td>\nMaliyet, k\u0131r\u0131lganl\u0131k, oksijen<\/td>\nTavan, oksijen<\/td>\nKarbon, d\u00fc\u015f\u00fck vakum<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Tungsten ve molibden aras\u0131ndaki se\u00e7im nadiren hangi metalin "daha iyi" oldu\u011fuyla ilgilidir. Bu, karbon i\u00e7ermeyen bir k\u0131s\u0131tlama dahilinde bir s\u0131cakl\u0131k karar\u0131d\u0131r: molibden, 1300 \u00b0C'ye kadar \u00e7o\u011fu tavlama, lehimleme ile ilgili ve manyetik malzeme i\u015fini daha d\u00fc\u015f\u00fck sarf malzemesi maliyetiyle kar\u015f\u0131larken, tungsten 2000 \u00b0C'ye kadar karbon i\u00e7ermeyen vaadi koruyan platformdur.<\/p>\n

Uygulamalar<\/h2>\n

Y\u00fcksek s\u0131cakl\u0131\u011fa dayan\u0131kl\u0131 metaller ve ala\u015f\u0131mlar\u0131.<\/strong> Radyasyon kalkan\u0131 ve kar\u015f\u0131 a\u011f\u0131rl\u0131k olarak kullan\u0131lan a\u011f\u0131r ala\u015f\u0131mlar da dahil olmak \u00fczere tungsten, molibden, tantal ve niyobyum bu s\u0131cak b\u00f6lgelerde sinterlenir veya tavlan\u0131r. Bunlar\u0131 grafit i\u00e7inde i\u015flemek teknik olarak m\u00fcmk\u00fcn olsa da kimyasal olarak istenmeyen bir durumdur: i\u015flenen malzeme ayn\u0131 zamanda en kolay karb\u00fcr olu\u015fturan malzemedir.<\/p>\n

Titanyum ve zirkonyum par\u00e7alar.<\/strong> Belirli bir ara bo\u015fluk i\u00e7eri\u011fine sahip t\u0131bbi implantlar, havac\u0131l\u0131k braketleri ve kimyasal i\u015flem donan\u0131mlar\u0131. Karbon birikimi, g\u00f6rsel olarak ortaya \u00e7\u0131kmadan \u00e7ok \u00f6nce sertlik ve s\u00fcneklik kaymas\u0131 olarak kendini g\u00f6sterir; tamamen metalden olu\u015fan s\u0131cak b\u00f6lge, metalurjiden bir de\u011fi\u015fkeni ortadan kald\u0131r\u0131r.<\/p>\n

Samaryum-kobalt m\u0131knat\u0131slar\u0131 ve manyetik malzemeler.<\/strong> SmCo hem karbona hem de oksijene kar\u015f\u0131 hassast\u0131r; molibden s\u0131cak b\u00f6lgeleri, \u00e7i\u011flenme noktas\u0131n\u0131n kontrol edildi\u011fi hidrojen destekli i\u015fleme ile birlikte bu \u00e7al\u0131\u015fma i\u00e7in pratik bir ortam sa\u011flar.<\/p>\n

Karbona duyarl\u0131 teknik seramikler.<\/strong> Karbon i\u00e7eren bir atmosferi kabul edemeyen silisyum karb\u00fcr, silisyum nitr\u00fcr ve al\u00fcminyum nitr\u00fcr par\u00e7alar tungsten platformda i\u015flenir. Ayn\u0131 malzemelerin bas\u0131n\u00e7 destekli yo\u011funla\u015ft\u0131r\u0131lmas\u0131 i\u00e7in y\u00f6ntem de\u011fi\u015fir; 6\/10 MPa'l\u0131k bir gaz bas\u0131n\u00e7l\u0131 sinterleme f\u0131r\u0131n\u0131 bas\u0131n\u00e7 \u00e7\u00f6z\u00fcm\u00fc olur ve s\u0131cak b\u00f6lge sorunu ikinci plana at\u0131l\u0131r.<\/p>\n

Parlak tavlama ve hidrojen servisi.<\/strong> Paslanmaz \u00e7elik, tak\u0131m \u00e7eli\u011fi, y\u00fcksek h\u0131z \u00e7eli\u011fi, s\u00fcper ala\u015f\u0131mlar ve demir d\u0131\u015f\u0131 \u015feritler, vakum veya hidrojen ile molibden \u0131s\u0131tma b\u00f6lgelerinde temiz bir \u015fekilde i\u015flenir. H serisi vakumlu hidrojen f\u0131r\u0131n\u0131m\u0131z, metal kaplama, lehimleme ve cam-metal s\u0131zd\u0131rmazl\u0131\u011f\u0131 da dahil olmak \u00fczere tam olarak bu t\u00fcr i\u015fler i\u00e7in 1000\/1300 \u00b0C'de molibden \u0131s\u0131tma elemanlar\u0131 kullan\u0131r.<\/p>\n

P\u00fcsk\u00fcrtme hedefleri ve elektronik malzemeler.<\/strong> Y\u00fcksek safl\u0131ktaki metaller ve ala\u015f\u0131mlarda eser miktarda karbon arka plan\u0131 film yap\u0131s\u0131n\u0131 de\u011fi\u015ftirir. Bu, s\u0131cakl\u0131ktan ziyade temizlikle ilgili bir \u015fartt\u0131r ve tamamen metalden olu\u015fan s\u0131cak b\u00f6lgenin daha y\u00fcksek g\u00fc\u00e7 t\u00fcketiminin kabul edildi\u011fi en a\u00e7\u0131k \u00f6rnektir.<\/p>\n

S\u0131n\u0131rlamalar \u2014 ne zaman bunu se\u00e7memelisiniz?<\/h2>\n

2000 \u00b0C'nin \u00fczerinde bir s\u0131cakl\u0131\u011fa ihtiya\u00e7 duydu\u011funuzda.<\/strong> Tungsten, en \u00fcst seviyede grafit ile rekabet edemez. C\/C kompozitler, grafit elektrotlar, karbon ke\u00e7e ve y\u00fcksek s\u0131cakl\u0131kta karb\u00fcr sinterleme, 2400 \u00b0C'deki grafitin s\u0131cak b\u00f6lgesine aittir.<\/p>\n

Y\u00fck, belirli bir s\u0131cakl\u0131kta oksijen veya su sald\u0131\u011f\u0131nda.<\/strong> Baz\u0131 oksit sistemleri, ba\u011flay\u0131c\u0131lar ve hidratl\u0131 bile\u015fikler \u0131s\u0131tma s\u0131ras\u0131nda oksijen veya nem a\u00e7\u0131\u011fa \u00e7\u0131kar\u0131r. Tungsten veya molibden \u0131s\u0131tma b\u00f6lgesinde bu, elementlere do\u011frudan sald\u0131r\u0131r. Bu i\u015flemi, alt\u0131 ay i\u00e7inde ar\u0131zalanacak bir \u0131s\u0131tma b\u00f6lgesi satmaktansa, grafit platformuna ta\u015f\u0131may\u0131 tercih ederiz.<\/p>\n

\u0130\u015flem mekanik bas\u0131nca ihtiya\u00e7 duydu\u011funda.<\/strong> Bunlar bas\u0131n\u00e7s\u0131z platformlard\u0131r. 2200 \u00b0C'de 100-1200 ton kuvvetle yap\u0131lan s\u0131cak presleme farkl\u0131 bir makinedir; 6\/10 MPa'da gaz bas\u0131n\u00e7l\u0131 sinterleme de \u00f6yle, 100\/150\/200 MPa'da s\u0131cak izostatik presleme de \u00f6yle.<\/p>\n

Par\u00e7alar b\u00fcy\u00fck ve ucuz oldu\u011funda.<\/strong> \u00dcr\u00fcn yelpazemizde 1000 mm s\u0131n\u0131f\u0131 molibden bir hazne bulunmaktad\u0131r, ancak karbona dayan\u0131kl\u0131, y\u00fcksek hacimli ve maliyet odakl\u0131 par\u00e7alar i\u00e7in grafit ke\u00e7e daha ucuzdur, i\u015fletme maliyeti daha d\u00fc\u015f\u00fckt\u00fcr ve y\u00fckleme konusunda \u00e7ok daha toleransl\u0131d\u0131r.<\/p>\n

Hi\u00e7 kimse elle\u00e7leme konusunda e\u011fitilemedi\u011finde.<\/strong> Dikkatsiz y\u00fckleme nedeniyle tungsten elemanlar ve ince molibden kalkanlar hasar g\u00f6r\u00fcr. At\u00f6lye, bo\u015fluk disiplinini sa\u011flayamazsa, bak\u0131m maliyeti metalurjik fayday\u0131 ortadan kald\u0131racakt\u0131r.<\/p>\n

\u0130lgili ekipman<\/h2>\n

Grafit, tungsten veya molibden gibi y\u00fcksek vakumlu ortamlarda bas\u0131n\u00e7s\u0131z \u00e7al\u0131\u015fma i\u00e7in, \u00fcr\u00fcnlerimiz vakumlu sinterleme f\u0131r\u0131n\u0131 yelpazesi<\/a> 300\u00d7300\u00d7400 mm ve \u00fczeri hazne boyutlar\u0131n\u0131 kapsar. \u0130\u015flem ayn\u0131 zamanda tek eksenli bir y\u00fcke ihtiya\u00e7 duydu\u011funda, P serisi grafit vakumlu s\u0131cak presleme f\u0131r\u0131n\u0131<\/a> 2200 \u00b0C'ye kadar 100-1200 tonluk bir kuvvet ekler ve tane irile\u015fme aral\u0131\u011f\u0131n\u0131n alt\u0131nda kalmas\u0131 gereken k\u00fc\u00e7\u00fck refrakter numuneler i\u00e7in, S2 k\u0131v\u0131lc\u0131m plazma sinterleme sistemi<\/a> Dakikada 300 \u00b0C'ye kadar y\u00fckselir.<\/p>\n

SSS<\/h2>\n

Tungsten vakum f\u0131r\u0131n\u0131 ile molibden vakum f\u0131r\u0131n\u0131 aras\u0131ndaki fark nedir?<\/h3>\n

Aradaki fark, s\u0131cakl\u0131k tavan\u0131 ve sarf malzemesi maliyetidir. Tungsten \u0131s\u0131tma b\u00f6lgeleri 1800\/2000 \u00b0C olarak listelenmi\u015ftir ve en y\u00fcksek karbon i\u00e7ermeyen s\u0131cakl\u0131\u011f\u0131n gerekli oldu\u011fu yerlerde kullan\u0131l\u0131r; molibden \u0131s\u0131tma b\u00f6lgeleri 1000\/1300 \u00b0C olarak listelenmi\u015ftir, yeniden in\u015fa maliyetleri daha d\u00fc\u015f\u00fckt\u00fcr ve \u00e7o\u011fu tavlama, manyetik malzeme ve s\u0131zd\u0131rmazl\u0131k i\u015fini kapsar. Her ikisi de tamamen metal, so\u011fuk duvarl\u0131, 6,7\u00d710\u207b\u00b3 Pa y\u00fcksek vakumlu tasar\u0131mlard\u0131r.<\/p>\n

Tungsten \u0131s\u0131tma b\u00f6lgesi karbon birikimini tamamen ortadan kald\u0131racak m\u0131?<\/h3>\n

Bu i\u015flem, s\u0131cak b\u00f6lgeyi karbon kayna\u011f\u0131 olmaktan \u00e7\u0131kar\u0131r. Y\u00fckten, ba\u011flay\u0131c\u0131dan, i\u00e7ine yerle\u015ftirdi\u011finiz ba\u011flant\u0131 par\u00e7alar\u0131ndan veya f\u0131r\u0131nlanmam\u0131\u015f bir haznedeki art\u0131k hidrokarbonlardan karbonu uzakla\u015ft\u0131rmaz. Sonu\u00e7 olarak, karbon arka plan de\u011fi\u015fkeni olmaktan ziyade kontrol edilebilir bir de\u011fi\u015fken haline gelir; ki bu da \u00e7o\u011fu spesifikasyonun asl\u0131nda ihtiya\u00e7 duydu\u011fu \u015feydir.<\/p>\n

Bu f\u0131r\u0131nlar\u0131n neden bir dif\u00fczyon veya molek\u00fcler pompaya ihtiyac\u0131 var?<\/h3>\n

\u00c7\u00fcnk\u00fc 6,7\u00d710\u207b\u00b3 Pa y\u00fcksek vakum s\u0131n\u0131f\u0131d\u0131r ve mekanik bir pompa tek ba\u015f\u0131na yaln\u0131zca kaba vakum aral\u0131\u011f\u0131na ula\u015fabilir. Pompa paketi uygulamaya g\u00f6re se\u00e7ilir: hafif y\u00fckl\u00fc, temiz bir proses bu de\u011feri rahatl\u0131kla kar\u015f\u0131layabilirken, y\u00fcksek gaz \u00e7\u0131k\u0131\u015f\u0131 olan bir y\u00fck, hazne hacminin tek ba\u015f\u0131na \u00f6nerdi\u011finden daha fazla pompalama h\u0131z\u0131na ihtiya\u00e7 duyabilir.<\/p>\n

Tungsten veya molibden \u0131s\u0131tma b\u00f6lgesinde hidrojen kullanabilir miyim?<\/h3>\n

Bu f\u0131r\u0131nlarda hidrojen kullan\u0131l\u0131r, ancak nem y\u00fcksek s\u0131cakl\u0131kta her iki metale de zarar verdi\u011finden \u00e7i\u011flenme noktas\u0131 kontrol edilmeli ve izlenmelidir. \u00dcr\u00fcn yelpazemizde hidrojenle \u00e7al\u0131\u015fabilen platform, 1000\/1300 \u00b0C'de molibden elemanl\u0131 H serisi vakumlu hidrojen f\u0131r\u0131n\u0131d\u0131r; kombine vakum ve hidrojen kullan\u0131m\u0131 i\u00e7in genellikle bu konfig\u00fcrasyonu teklif ediyoruz.<\/p>\n

Tungsten \u0131s\u0131t\u0131c\u0131m birka\u00e7 ay sonra \u00e7atlad\u0131. Bunun genellikle sebebi nedir?<\/h3>\n

\u00dc\u00e7 ana neden \u00f6ne \u00e7\u0131kar: k\u00fc\u00e7\u00fck bir s\u0131z\u0131nt\u0131dan oksijen veya su giri\u015fi, eleman ile kalkan veya y\u00fck aras\u0131nda mekanik temas ve \u00e7ok dik bir e\u011fimden veya kontrols\u00fcz so\u011fumadan kaynaklanan termal \u015fok. Yeniden kristalle\u015fmi\u015f tungsten neredeyse hi\u00e7 s\u00fcnekli\u011fe sahip de\u011fildir, bu nedenle \u00e7atlak bir belirtidir; as\u0131l neden genellikle atmosfer kayd\u0131nda veya y\u00fckleme prosed\u00fcr\u00fcndedir.<\/p>\n

Bu f\u0131r\u0131nlar oksit seramikleri sinterleyebilir mi?<\/h3>\n

Bazen, ve bu bir vaka incelemesi gerektirir. Al\u00fcminyum oksit ve zirkonya, grafit s\u0131cak b\u00f6lgelerinde daha y\u00fcksek s\u0131cakl\u0131klarda rutin olarak i\u015flenir; e\u011fer etken s\u0131cakl\u0131k de\u011fil de karbon hassasiyeti ise, ba\u011flay\u0131c\u0131 sistem s\u0131cakl\u0131kta oksijen veya nem a\u00e7\u0131\u011fa \u00e7\u0131karmad\u0131\u011f\u0131 s\u00fcrece 1300 \u00b0C'ye kadar molibden platformu i\u015fe yarayabilir. Bize malzemeyi, ba\u011flay\u0131c\u0131y\u0131 ve d\u00f6ng\u00fcy\u00fc g\u00f6nderin, uygun olup olmad\u0131\u011f\u0131n\u0131 a\u00e7\u0131k\u00e7a s\u00f6yleyelim.<\/p>","protected":false},"excerpt":{"rendered":"

A tungsten vacuum furnace is a cold-wall vacuum furnace whose heating elements and radiation shields 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