Ukucima, okukwabizwa ngokuba lukhuni yinkqubo yokufudumeza kwaye emva koko ukupholisa kwentsimbi (okanye enye i-alloy) ngesantya esiphezulu ukuba kukho ukwanda okukhulu kobunzima, nokuba kumhlaba okanye kuyo yonke indawo.Kwimeko yokucima i-vacuum, le nkqubo yenziwa kwiziko lokufunxa apho amaqondo obushushu afikelela kwi-1,300 ° C anofikelelwa.Iindlela zokucima ziya kwahluka ngokubhekiselele kwizinto eziphathwayo kodwa ukucinywa kwegesi kusetyenziswa initrogen kuxhaphake kakhulu.
Ukucima irhasi yevacuum:
Ngexesha le-vacuum gas Ukucima, izinto zifudunyezwa ngokungabikho kwe-oksijini ngokuhambisa phakathi kwegesi ye-inert (N₂) kunye / okanye ubushushu bemitha kwi-underpressure.Intsimbi iqiniswa ngomjelo wenitrogen, apho izinga lokupholisa linokumiselwa ngokukhetha uxinzelelo olugqithisileyo.Ngokuxhomekeke kwimilo ye-workpiece kunokwenzeka kwakhona ukukhetha indlela kunye nexesha lokuvuthela i-nitrogen.Ukulungiswa kwexesha kunye nokulawulwa kokushisa kwentsimbi kuqhutyelwa ngexesha lenkqubo kunye nokusetyenziswa kwe-thermocouples yomqhubi onokufakwa kwi-workpiece kwigumbi lokufudumala.Intsimbi ephathwa ubushushu kwi-vacuum furnace ifumana iimpawu ezichaziweyo zamandla kunye nokuqina kulo lonke icandelo elinqamlezayo, ngaphandle kwe-decarburization yomhlaba.I-Austenitic grain ilungile kwaye iyahambelana nemigangatho yamazwe ngamazwe.
Ngokwenyani zonke iialloyi zentsimbi ezinomdla zobugcisa, ezinjengeentsimbi zasentwasahlobo, iintsimbi ezisebenza ngokubanda, iintsimbi ezicinyiweyo nezipholileyo, iintsimbi ezichasayo, iintsimbi ezisebenza ngokushushu kunye neentsimbi zesixhobo, kunye nenani elikhulu leentsimbi ezinealloyi eziphezulu kunye nentsimbi. -i-iron alloys, inokuqiniswa ngolu hlobo.
Ukucinywa kweOyile yeVacuum
Vacuum Oil quenching ukupholisa izinto ezishushu nguVacuum oil.Njengoko ukudluliselwa kwentlawulo kwenzeka phantsi kwe-vacuum okanye ukhuseleko lwe-inert-gas emva kokuba sicoce ukucoca isithando somlilo, inxalenye yomhlaba isoloko ikhuselwe de ifakwe ngokupheleleyo kwioli.Ukukhuselwa komphezulu kufana kakhulu nokuba kucinywa kwi-oyile okanye kwigesi.
Inzuzo enkulu xa kuthelekiswa nezisombululo eziqhelekileyo zokucima ioli ye-atmospheric lulawulo oluchanekileyo lweeparamitha zokupholisa.Ngesithando somlilo, kunokwenzeka ukuguqula iiparameters eziqhelekileyo zokucima - ubushushu kunye nokuphazamiseka - kunye nokuguqula uxinzelelo ngaphezu kwetanki yokucima.
Ukutshintsha uxinzelelo olungaphezulu kwetanki kuya kubangela umahluko kuxinzelelo ngaphakathi kwibhafu yeoli, etshintsha ijika lokupholisa ioyile elichazwe kuxinzelelo lomoya.Ngokwenene, indawo yokubilisa sisigaba apho isantya sokupholisa siphezulu.Utshintsho kuxinzelelo lweoyile luya kuguqula i-vaporization yayo ngenxa yobushushu bomthwalo.
Ukunciphisa uxinzelelo kuya kusebenzisa i-vaporization phenomena, eqalisa isigaba sokubilisa.Oku kuya kwandisa ukusebenza kakuhle kokupholisa kolwelo lokucima kunye nokuphucula amandla okuqina ngokuchasene nemeko yomoya.Nangona kunjalo, isizukulwana esikhulu somphunga sinokubangela i-sheath phenomenon kwaye sibangele ukuguquka okunokwenzeka.
Ukunyuka koxinzelelo kwioyile kuthintela ukubunjwa komphunga kwaye kubambezele ukuvela komphunga.I-sheath inamathela kwindawo kwaye iphole ngokufanayo kodwa ingaphantsi kakhulu.Ukucinywa kwe-oyile kwi-vacuum ngoko ke kufana kakhulu kwaye kubangela ukuphazamiseka okuncinci.
Ukucima ukucima amanzi
Inkqubo efana nokucima ioyile yokucoca,Sisisombululo esifanelekileyo sokuqina kobushushu bonyango lwe-aluminiyam, i-titanium okanye ezinye izinto ezifuna ukupholiswa ngesantya esikhawulezayo ngokwaneleyo.
Ixesha lokuposa: May-07-2022