Plastic processing, tseem hu ua xovxwm ua, yog ib txoj hauv kev uas cov khoom siv hlau los yog alloy yog plastically deformed nyob rau hauv qhov kev txiav txim ntawm ib tug sab nraud quab yuam kom tau ib tug xav tau cov duab loj thiab kev ua tau zoo.

Cov txheej txheem yas yog muab faib ua thawj deformation thiab theem nrab deformation, thiab thawj deformation yog qhov blanking.

Lub tungsten, molybdenum thiab alloy strips rau kev kos duab yog tsim los ntawm cov hmoov hlau metallurgy, uas yog cov qauv zoo, uas tsis tas yuav tsum tau stacked thiab forged, thiab tuaj yeem raug xaiv ncaj qha rau seem thiab qhov hom dov. Rau arc smelting thiab electron beam melting ingots nrog coarse grain qauv, nws yog ib qho tsim nyog yuav tsum tau ua ntej extrude los yog forge lub dawb paug los tiv thaiv peb-txoj kev compressive kev nyuaj siab lub xeev kom tsis txhob tshwm sim ntawm grain ciam teb tawg rau ntxiv ua.

Lub plasticity ntawm cov khoom yog qhov degree ntawm deformation ntawm cov khoom ua ntej tawg. Lub zog yog lub peev xwm ntawm cov khoom siv los tiv thaiv deformation thiab tawg. Lub toughness yog lub peev xwm ntawm cov khoom siv los nqus lub zog los ntawm cov yas deformation mus rau tawg. Tungsten-molybdenum thiab nws cov alloys zoo li muaj zog, tab sis muaj peev xwm deformation tsis zoo, lossis tsis tuaj yeem tiv taus cov yas deformation nyob rau hauv ib txwm muaj, thiab pom tsis zoo toughness thiab brittleness.

1, yas-nkig hloov kub

Lub brittleness thiab toughness tus cwj pwm ntawm cov khoom hloov nrog kub. Nws yog ntshiab nyob rau hauv ib tug yas-nkig hloov kub ntau yam (DBTT), uas yog, nws muaj peev xwm yuav plastically deformed nyob rau hauv siab kev nyuaj siab saum toj no kub ntau yam, qhia zoo toughness. Cov ntaub ntawv sib txawv ntawm cov pob txha tawg tuaj yeem tshwm sim thaum ua deformation hauv qab no qhov kub thiab txias. Cov hlau sib txawv muaj qhov sib txawv ntawm qhov kub thiab txias, tungsten feem ntau nyob ib ncig ntawm 400 ° C, thiab molybdenum nyob ze ntawm chav tsev kub. Lub siab hloov pauv ntawm cov yas-nkig yog qhov tseem ceeb ntawm cov khoom siv brittleness. Cov yam ntxwv cuam tshuam rau DBTT yog cov yam ntxwv uas cuam tshuam rau pob txha tawg. Txhua yam uas txhawb cov brittleness ntawm cov ntaub ntawv yuav ua rau kom DBTT. Cov kev ntsuas los txo DBTT yog kom kov yeej brittleness thiab nce. Kev ntsuas siab.

Cov yam tseem ceeb uas cuam tshuam rau qhov kub hloov pauv ntawm cov khoom siv yas yog qhov purity, grain loj, degree ntawm deformation, kev nyuaj siab lub xeev thiab alloying ntsiab ntawm cov khoom.

2, tsis tshua muaj kub (los yog chav tsev kub) recrystallization brittleness

Cov ntaub ntawv muaj tungsten thiab molybdenum nyob rau hauv lub xeev recrystallized muaj kev sib txawv kiag li txhua yam kev coj cwj pwm los ntawm industrially ntshiab lub ntsej muag-centered cubic tooj liab thiab txhuas cov ntaub ntawv ntawm chav tsev kub. Cov recrystallized thiab annealed tooj liab thiab txhuas cov ntaub ntawv tsim ib tug equiaxed recrystallized grain qauv, uas muaj zoo heev chav tsev kub ua plasticity thiab muaj peev xwm ua arbitrarily ua rau hauv cov khoom nyob rau hauv lub chav tsev kub, thiab tungsten thiab molybdenum muaj ib tug loj brittleness ntawm chav tsev kub tom qab recrystallization. Ntau hom ntawm brittle fracture tau yooj yim tsim thaum ua thiab siv.