Q:Peb tsim thiab vuam 6061-T6 txhuas hauv ntau hom khoom. Peb paub tias lub zog tensile kawg (UTS) ntawm welded 6061-T6 yog qhov qis dua qhov qub T6 lub zog. Tsis ntev los no, qee cov neeg tau hais tias kev kho mob qis qis tom qab vuam tuaj yeem kho cov khoom siv welded rau T6 lub zog. Qhov no puas yog?
A:Kuv xav tias qhov ntawd yog qhov teeb meem, vim nws yuav yooj yim rau tej yam considerably. Hmoov tsis, nws tsis yog.
Yam tsawg kawg nkaus uas yuav tsum tau UTS rau feem ntau 6061-T6 cov ntaub ntawv khoom yog 40 KSI. Txawm li cas los xij, kev tsim cov lej xws li AWS D1.2 lossis ASME Boiler thiab Pressure Vessel Code tsuas yog xav tau qhov tsawg kawg nkaus ntawm 24 KSI UTS tom qab vuam. Qhov no yog tus nqi xav tau thaum kuaj tensile yog ib feem ntawm kev tsim nyog cov txheej txheem vuam, thiab nws feem ntau tsis nyuaj rau kev ua tiav. Kev ntsuas tensile ntawm cov qauv welded feem ntau tau txais 25-26 KSI.
Yog tias koj sim ua kom qis - qhov kub thiab txias ntawm cov qauv welded ua ntej kev sim, cov cua sov- cov cheeb tsam cuam tshuam (HAZs) yuav muaj zog me ntsis, tab sis kev ntsuam xyuas feem ntau yuav pom tsuas yog 1-2 KSI kev txhim kho-txog 25–27 KSI- deb ntawm tag nrho T6 cov khoom.
Restoring 6061-T6 Tensile Strength
Tib txoj hauv kev kom rov ua tiav T6 lub zog yog kev kho kom rov ua kom tiav: kev kho cua sov ntawm kwv yees li 1,000℃F, txias sai sai - dej quenching, ua raws li qis- kub aging ntawm ib ncig ntawm 400℃F. Cov txheej txheem no ua tau tab sis nyuaj thiab yuav tsum muaj kev paub ntau. Ib qho kev sib tw feem ntau yog distortion thaum lub sij hawm quenching, uas yuav tsum tau mechanically straightened ua ntej aging -ib kauj ruam nyuaj.
Lwm txoj hauv kev yog los tsim cov khoom pib hauv T4 temper dua li T6. Weld cov khoom siv T4, tom qab ntawd ua qhov qis -kub kev laus ntawm 400℃F rau ib teev (los yog lwm lub sijhawm, piv txwv li, 325℃F rau yim teev). Kev ntsuas tensile tom qab qhov kev kho mob no feem ntau qhia tau hais tias nyob ib puag ncig 35 KSI UTS-tseem qis dua T6 qib tab sis tseem ceeb dua li qhov raug 24 KSI ua tiav tam sim tom qab vuam.
Muaj ob qhov teeb meem uas yuav xav txog:
T4 temper aluminium tuaj yeem nyuaj rau qhov chaw rau cov neeg siv me me, txawm tias cov neeg siv loj feem ntau tsis muaj teeb meem.
Fabrication codes tsis muab credit rau txoj kev no; Cov qauv tsim tseem yuav tsum xav tias welded zog ntawm 24 KSI. Txawm li cas los xij, rau cov ntawv thov tsis raug khi los ntawm tus lej, txoj hauv kev no tuaj yeem txhim kho kev ua haujlwm.
GNEEpom zoo kom ua tib zoo ntsuam xyuas koj qhov vuam thiab cua sov-kev kho muaj peev xwm ua ntej sim ua kom tiav T6 rov qab, thiab xav txog T4 pib cov khoom siv nrog kev xa tawm - vuam aging raws li lwm txoj hauv kev.
