Ts'ebetso ea polasetiki, eo hape e tsejoang e le khatiso ea khatiso, ke mokhoa oa ho sebetsa oo tšepe kapa lisebelisoa tsa alloy li holofetseng ka tlas'a ketso ea matla a kantle ho fumana boholo ba sebopeho le ts'ebetso e lakatsehang.

Ts'ebetso ea polasetiki e arotsoe ka deformation ea mantlha le deformation ea bobeli, 'me deformation ea pele ke ho koala.

Li-tungsten, molybdenum le alloy strips bakeng sa ho taka li hlahisoa ka mokhoa oa phofo oa metallurgy, e leng mohaho o motle, o sa hlokeng ho phutheloa le ho etsoa, ​​​​'me o ka kenngoa ka ho toba karolong e khethiloeng le mofuta oa lesoba. Bakeng sa ho qhibiliha ha arc le li-ingots tsa beam tse qhibilihisang ka sebopeho sa lijo-thollo tse mahoashe, ho hlokahala hore u ntlafatse pele kapa u qhekelle sekheo ho mamella boemo ba khatello ea maikutlo ea mekhoa e meraro ho qoba ho hlaha ha mapetsong a moeli oa lijo-thollo bakeng sa ts'ebetso e tsoelang pele.

Plastiki ea thepa ke tekanyo ea deformation ea thepa pele e robeha. Matla ke bokhoni ba thepa ho hanela deformation le fracture. The toughness ke bokhoni ba thepa ho monya matla ho tloha deformation polasetiki ho fracture. Tungsten-molybdenum le li-alloys tsa eona li na le matla a phahameng, empa li na le matla a fokolang a polasetiki, kapa ha li khone ho mamella deformation ea polasetiki tlas'a maemo a tloaelehileng, 'me li bonts'a boima bo bobe le bofokoli.

1, polasetiki-brittle phetoho mocheso

The brittleness le toughness boitšoaro ba lintho tse bonahalang e fetoha le mocheso. E hloekile ka har'a mocheso oa mocheso oa polasetiki-brittle transition range (DBTT), ke hore, e ka senyeha ka polasetiki tlas'a khatello e phahameng ea mocheso ka holim'a mocheso ona oa mocheso, ho bontša ho tiea ho hotle. Mefuta e fapaneng ea brittle fracture e atisa ho etsahala nakong ea ts'ebetso ea deformation ka tlase ho mocheso ona. Litšepe tse fapaneng li na le mocheso o fapaneng oa phetoho ea polasetiki-brittle, tungsten hangata e ka ba 400 ° C, 'me molybdenum e haufi le mocheso oa kamore. Mocheso o phahameng oa polasetiki-brittle transition ke tšobotsi ea bohlokoa ea brittleness ea thepa. Lintlha tse amang DBTT ke lintlha tse amang ho robeha ha brittle. Lintho life kapa life tse khothalletsang ho senyeha ha thepa li tla eketsa DBTT. Mehato ea ho fokotsa DBTT ke ho hlola brittleness le ho eketseha. Mehato ea ho mamella.

Lintlha tse amang mocheso oa phetoho ea polasetiki-brittle ea thepa ke bohloeki, boholo ba lijo-thollo, tekanyo ea deformation, boemo ba khatello ea maikutlo le likarolo tsa alloying tsa thepa.

2, mocheso tlaase (kapa mocheso kamoreng) recrystallization brittleness

Lisebelisoa tsa tungsten tsa indasteri le molybdenum naheng e nchafalitsoeng li bonts'a mekhoa e fapaneng ka ho felletseng ea boits'oaro bo fapaneng ho tsoa ho li-cubic copper le lisebelisoa tsa aluminium tse nang le mocheso oa kamore. Lisebelisoa tsa koporo le aluminium tse kentsoeng hape li entsoe ka mokhoa o ts'oanang oa lijo-thollo, o nang le polasetiki e ntle ea mocheso oa kamore 'me e ka sebetsoa ka mokhoa o ikhethileng hore e be thepa ea mocheso oa kamore,' me tungsten le molybdenum li bonts'a bofokoli bo matla mochesong oa kamore kamora ho nchafatsoa hape. Mefuta e fapaneng ea brittle fracture e hlahisoa habonolo nakong ea ts'ebetso le ts'ebeliso.