The batang brittleness (kapa boemo bo tlase ba mocheso o tlase) oali-tubes tse batangnakong ea tšebeliso e emeloa ke toughness brittleness phetoho mocheso Tc.Tc ea tšepe e hloekileng haholo (0.01% C) e ho -100C, 'me ka tlas'a mocheso ona, e se e le boemong bo brittle ka ho feletseng.Likarolo tse ngata tsa alloy ka ho nepahala ha lipeipi tse khanyang tsa tšepe li eketsa toughness brittleness phetoho mocheso oa lipeipi tsa tšepe tse batang, tse eketsang tšekamelo ea ho ba le brittleness e batang.Ha ho robeha ha ductile ho etsahala ka holim'a mocheso oa kamore, karolo e ka holimo ea mocheso oa liphaephe tse khanyang tse batang ke ho robeha ha sebopeho sa dimple, athe ha ho robeha ha brittle ho hlaha mocheso o tlase, ke ho robeha ha cleavage.
Lebaka la ho koaheloa ha mocheso o tlase oa li-tubes tse khanyang tse batang ke:
(1) Ha li-dislocation tse hlahisoang ke mohloli oa ho kheloha nakong ea deformation li koetsoe ke litšitiso (tse kang meeli ea lijo-thollo kapa li-equivalences tsa bobeli), khatello ea sebaka seo e feta matla a khopolo-taba a liphaephe tsa tšepe tse khanyang tse batang, tse hlahisang microcracks.
(2) Likarolo tse 'maloa tse phuthetsoeng li etsa "microcrack" moeling oa lijo-thollo.
(3) Karabelo mateanong a lihlopha tse peli tsa slip, tse bakang dislocations tse sa sisinyeheng% 26lt;010% 26gt, e nang le microcrack e bōpehileng joaloka cheche e khonang ho petsoha haufi le sefofane sa cleavage.
Lintlha tse amang brittleness e batang ea li-tubes tse khanyang tse batang li kenyelletsa:
(1) Lintho tse matlafatsang tharollo e tiileng.Phosphorus eketsa toughness brittleness phetoho mocheso ka matla ho feta;Ho boetse ho na le molybdenum, titanium, le vanadium;Ha litaba li le tlase, phello ha e bohlokoa, athe ha litaba li le holimo, likarolo tse eketsang mocheso oa phetoho ea brittleness li kenyelletsa silicon, chromium le koporo.Lintho tse fokotsang mocheso oa phetoho ea toughness brittleness li kenyelletsa nickel, 'me lintho tse qalang ho fokotseha ebe li eketsa mocheso oa phetoho ea toughness brittleness li kenyelletsa manganese.
(2) Lintlha tse bōpang karolo ea bobeli.Ntho ea bohlokoa ka ho fetisisa bakeng sa ho eketsa brittleness e batang ea liphaephe tsa tšepe tse khanyang ka mokhoa o batang ka karolo ea bobeli ke carbon.Ha khabone e ka har'a liphaephe tsa tšepe tse khanyang tse pota-potiloeng ka serame e ntse e eketseha, karolo ea pearlite ka liphaephe tsa tšepe tse khanyang tse batang lia eketseha.Ka karolelano, bakeng sa keketseho e 'ngoe le e 'ngoe ea 1% ea molumo oa pearlite, mocheso oa phetoho ea toughness brittleness o eketseha ka 2.2 ℃ ka karolelano.
(3) Phello ea litaba tsa khabone ho brittleness ka tšepe ea ferritic pearlite.Keketso ea likaroloana tsa microalloying joalo ka titanium, niobium, le vanadium mefuta e hasaneng ea nitrides kapa carbonitrides, e bakang keketseho ea mocheso o thata oa phetoho ea lipeipi tsa tšepe tse khanyang tse batang.
4Ho hloekisa boholo ba lijo-thollo ho fokotsa tšekamelo ea ho ba le serame se batang liphaepheng tsa tšepe tse kolobisitsoeng tse batang, e leng mokhoa o sebelisoang haholo.
Nako ea poso: Sep-01-2023