Yas Ua Haujlwm Ntawm Molybdenum Alloys

Plastic forming tsis yog tsuas yog ib txoj hauv kev rau shaping molybdenum alloys, tab sis nws kuj tuaj yeem txhim kho lawv lub zog thiab qis - kub plasticity. Molybdenum thiab nws cov alloys tuaj yeem ua rau hauv daim hlau, strips, foils, raj, tuav, xov hlau, thiab cov ntaub ntawv siv cov txheej txheem tsim cov yas. Ib tug yam ntxwv ntawm kev ua cov ntaub ntawv molybdenum alloy yog tias txhua tus txheej txheem kub deformation muaj qhov cuam tshuam loj rau cov khoom kawg ntawm cov khoom. Molybdenum oxidizes sai tshaj 600 degree, thiab nyob ib ncig ntawm 725 degree, cov khoom oxidation volatilize thiab ib theem ua kua tshwm. Yog li ntawd, hydrogen los yog lwm yam kev txo cua sov feem ntau yog siv los tiv thaiv thaum cua sov molybdenum thiab nws cov alloys.

Molybdenum thiab nws cov alloy ingots yog tsim los ntawm cov hmoov metallurgy, tab sis smelting kuj siv tau. Cov me me - loj ingots feem ntau yog tsim los ntawm cov hmoov hlau metallurgy, thaum loj - loj ingots tuaj yeem tsim los ntawm ob txheej txheem. Kev xaiv ntawm cov txheej txheem nyob ntawm qhov kev ua tau zoo ntawm cov khoom kawg.

Extrusion yog siv los rhuav tshem coarse cam khwb cia nplej, txhim kho lub machinability ntawm ingots. Nws kuj tseem siv tau los tsim cov raj, tuav, thiab cov profiles. Txhawm rau kom muaj txiaj ntsig zoo ntawm cov nplej, qhov sib piv extrusion yuav tsum tsis pub tsawg tshaj 4, thiab qhov kub ntawm extrusion feem ntau yog 1100 thiab 1315 degree.

Forging

Xws li rotary forging thiab pa forging. Rotary forging feem ntau yog siv los ua cov billets rau nyias tuav thiab kos cov xov hlau nrog txoj kab uas hla ntawm 2.5 hli lossis ntau dua, siv 10-30 hli square sintered tuav. Qhov pib forging kub rau ntshiab molybdenum rotary forging yog feem ntau nyob ib ncig ntawm 1400 degree, nrog ib tug dhau deformation ntawm 10-20%, qee zaum ncav cuag 30%. Raws li txoj kab uas hla txo, qhov forging kub maj mam txo, xa me nyuam rov mus rau ib ncig ntawm 800℃rau 3 hli txoj kab uas hla billets. Rau cov pa forging, rauj forging yog qhov tsim nyog tshaj li qhov siab forging.

Rolling

Siv rau kev tsim cov phaj, strips, foils, thiab tuav. Qhov pib dov kub rau billets muab los ntawm smelting-extrusion feem ntau yog nyob nruab nrab ntawm 1200-1250℃; qhov pib dov kub rau billets muab los ntawm hmoov metallurgy feem ntau nyob ib ncig ntawm 1400 degree. Txhawm rau txo qhov tsis sib xws, qhov deformation ib zaug thaum pib dov yuav tsum nyob nruab nrab ntawm 20-40%, nrog rau tag nrho cov deformation ntawm kwv yees li 75% tom qab txhua qhov cua sov.

Kev kho cua sov

Recrystallization annealing thiab stress-relief annealing feem ntau yog siv. Recrystallization annealing yog siv nyob rau hauv extrusion, forging, thiab kub dov txheej txheem. Kev ntxhov siab- nyem annealing yog siv los tshem tawm kev ua haujlwm nyuaj. Vim hais tias recrystallization annealing nce cov yas- qhov hloov pauv kub ntawm cov khoom, uas ua rau muaj kev puas tsuaj rau kev ua tiav tom qab, cov khoom tiav feem ntau xa tuaj thiab siv rau hauv kev ntxhov siab- nyem lub xeev annealed.