Ka lebaka la boteng ba brittleness ea khalefo nakong ea ho qhekella le ho sebetsa ha forgings, mocheso o teng oa mocheso o fokotsehile. Ho thibela brittleness hore e se ke ea eketseha nakong ea mocheso, ho hlokahala hore u qobe mefuta ena e 'meli ea mocheso, e leng se etsang hore ho be thata ho fetola thepa ea mochine. Mofuta oa pele oa lefu la tsoekere. Mofuta oa pele oa brittleness oa khalefo o hlahang nakong ea mocheso pakeng tsa 200 le 350 ℃ o boetse o tsejoa e le brittleness ea mocheso o tlase. Haeba mofuta oa pele oa brittleness ea khalefo o hlaha ebe o futhumatsoa ho mocheso o phahameng bakeng sa ho halefisa, brittleness e ka felisoa 'me matla a tšusumetso a ka eketsoa hape. Mothating ona, haeba o halefile ka har'a mocheso oa 200-350 ℃, brittleness ena e ke ke ea hlola e etsahala. Ho tsoa ho sena, ho ka bonoa hore mofuta oa pele oa khalefo o ke keng oa fetoloa, ka hona o tsejoa hape e le ho halefa ho sa fetoheng. Mofuta oa bobeli oa brittleness. Tšobotsi ea bohlokoa ea brittleness ea khalefo mofuteng oa bobeli oa likere tse qhetsoeng ke hore, ntle le ho baka brittleness nakong ea ho pholile butle nakong ea mocheso o pakeng tsa 450 le 650 ℃, butle-butle ho feta sebakeng sa nts'etsopele se brittle pakeng tsa 450 le 650 ℃ kamora ho futhumala ha mocheso o phahameng. hape baka brittleness. Haeba pholiso e potlakileng e feta sebakeng sa nts'etsopele ea brittle kamora ho futhumala ha mocheso o phahameng, e ke ke ea baka ho putlama. Mofuta oa bobeli oa brittleness ea khalefo o ka khutlisetsoa morao, ka hona o tsejoa hape e le "reversible temper brittleness". Mofuta oa bobeli oa ts'ebetso ea ho halefa o rarahane haholo, 'me ho leka ho hlalosa liketsahalo tsohle ka khopolo e le' ngoe ho hlakile hore ho thata haholo, kaha ho ka 'na ha e-ba le mabaka a fetang le le leng a ho ferekanya. Empa ntho e le 'ngoe e tiile, ts'ebetso ea embrittlement ea mofuta oa bobeli oa ho halefa ha bohale ke mokhoa o ka qojoang o hlahang moeling oa lijo-thollo' me o laoloa ke ho hasana, ho ka fokolisang moeli oa lijo-thollo 'me ha o amane ka ho toba le martensite le masala a austenite. Ho bonahala eka ho na le maemo a mabeli feela a ka bang teng bakeng sa ts'ebetso ena e ka khutlisoang morao, e leng ho arohana le ho nyamela ha liathomo tse solute meeling ea lijo-thollo, le pula le ho putlama ha mekhahlelo e brittle haufi le meeli ea lijo-thollo.
Sepheo sa ho futhumatsa tšepe ka mor'a ho tima nakong ea ho qhekella le ho sebetsa ha forgings ke ho: 1. ho fokotsa brittleness, ho felisa kapa ho fokotsa khatello ea kelello ka hare. Ka mor'a ho tima, likarolo tsa tšepe li na le khatello e kholo ea ka hare le brittleness, 'me ho hlōleha ho halefa ka nako e loketseng hangata ho lebisa ho deformation kapa esita le ho phunyeha ha likarolo tsa tšepe. 2. Fumana thepa e hlokahalang ea mochine oa workpiece. Ka mor'a ho tima, workpiece e na le boima bo phahameng le brittleness e phahameng. E le ho fihlela litlhoko tse fapaneng tsa ts'ebetso ea li-workpieces tse fapa-fapaneng, ho thatafala ho ka fetoloa ka ho futhumatsa ho loketseng ho fokotsa brittleness le ho fumana boima bo hlokahalang le polasetiki. 3. Tsitsisa boholo ba workpiece. 4. Bakeng sa litšepe tse ling tsa alloy tseo ho leng thata ho li nolofatsa ka mor'a ho kenngoa, mocheso o phahameng oa mocheso o atisa ho sebelisoa ka mor'a ho tima (kapa ho tloaeleha) ho kopanya ka mokhoa o nepahetseng li-carbides ka tšepe, ho fokotsa boima, le ho nolofatsa ts'ebetso ea ho itšeha.
Ha ho etsoa forgings, bohale brittleness ke bothata bo lokelang ho hlokomeloa. E fokotsa mefuta e mengata ea mocheso o teng, kaha mocheso o lebisang ho brittleness o eketsehileng o tlameha ho qojoa nakong ea ho futhumatsa. Sena se baka mathata ho lokisa thepa ea mochini.
Mofuta oa pele oa brittleness ea khalefo haholo-holo o hlaha pakeng tsa 200-350 ℃, eo hape e tsejoang e le brittleness ea mocheso o tlase. brittleness ena e ke ke ea etsolloa. Hang ha e etsahala, ho futhumatsa mocheso o phahameng bakeng sa mocheso ho ka felisa brittleness le ho ntlafatsa matla a ts'ebetso hape. Leha ho le joalo, ho futhumatsa ka har'a mocheso oa 200-350 ℃ ho tla boela ho baka brittleness ena. Ka hona, mofuta oa pele oa brittleness oa khalefo o ke ke oa fetoloa.
Tšobotsi ea bohlokoa ea mofuta oa bobeli oa ho halefa ke hore ho pholisa butle nakong ea mocheso pakeng tsa 450 le 650 ℃ ho ka baka brittleness, ha butle-butle ho feta sebakeng sa ntshetsopele ea brittle pakeng tsa 450 le 650 ℃ ka mor'a hore mocheso oa mocheso o phahameng o ka baka brittleness. Empa haeba pholiso e potlakileng e feta sebakeng sa nts'etsopele ea brittle ka mor'a mocheso o phahameng oa mocheso, brittleness e ke ke ea etsahala. Mofuta oa bobeli oa brittleness ea khalefo o ka khutlisetsoa morao, 'me ha brittleness e nyamela 'me e futhumatsoa hape butle-butle e pholile hape, brittleness e tla tsosolosoa. Ts'ebetso ena ea embrittlement e laoloa ke ho hasana 'me e etsahala meeling ea lijo-thollo, eseng ka ho toba e amanang le martensite le masalla austenite.
Ka kakaretso, ho na le merero e mengata ea ho futhumatsa tšepe ka mor'a ho tima nakong ea ho qhekella le ho sebetsa ha forgings: ho fokotsa brittleness, ho felisa kapa ho fokotsa khatello ea kelello ea ka hare, ho fumana thepa e hlokahalang ea mochine, ho tsitsisa boholo ba mosebetsi, le ho fetola litšepe tse itseng tseo ho leng thata ho li nolofatsa nakong ea annealing. ho seha ka hara mocheso o phahameng wa mocheso.
Ka hona, ts'ebetsong ea ho qhekella, hoa hlokahala ho nahana ka botlalo ka phello ea brittleness ea tempering, 'me u khethe mocheso o nepahetseng oa mocheso le maemo a ts'ebetso ho finyella litlhoko tsa likarolo, e le ho finyella thepa e ntle ea mochine le botsitso.
Nako ea poso: Oct-16-2023
