1.What yog tus tseem ceeb log tsheb ntawm kev txiav txim siab ntawm kev txiav txim siab "Kev Txom Nyem Loj"?
Elongation yog qhov tseem ceeb tshaj plaws℃ntawm cov yas deformation ib cov khoom tuaj yeem tiv taus ua ntej tawg (piv txwv li "ductility"). Qhov siab dua elongation, ntau cov ntaub ntawv tuaj yeem ua xyab thiab khoov tsis tawg, thaum muaj kev cuam tshuam ntxiv rau "brittle breating" thaum ua haujlwm.
Piv txwv li, Galvanized chev nrog 25% elongation tuaj yeem ncav cuag li 1.25 zaug nws thawj ntev ua ntej tawg; Whereas cov khoom siv nrog ib 15% yuav tawg tom qab tau nthuav dav tsuas yog 1.15 npaug nws thawj qhov ntev. Tus qub tau muaj ntau dua kev tsim cov npoo dua cov tom kawg.
2.What yog tus yam ntxwv ntawm kev loj hlob tus nqi ntawm cov thwj cim?
Yooj yim ntiav xuas nrig (xws li punching qhov hauv daim ntawv tiaj tus thiab daim duab ntiav ntiav):
Tsuas yog muaj kev cuam tshuam ntxiv qub yog qhov yuav tsum tau ua, thiab qhov xav tau elongation yog qhov qis (feem ntau ntau dua lossis sib npaug rau 18%). Piv txwv li, rau cov ntawv txee sab Panels thiab cua txias sab nraum zoov rov qab Panels, DX51d nrog kev mus elongation 20% -2% yog txaus. Yog hais tias elongation dhau lawm (piv txwv li,<15%), "micro-cracks" may form at the hole edges or in the stretched areas during punching, leading to increased scrap rates.
Cov txheej txheem sib nqus (xws li cov roj tso roj roj Automotive, Thermos flask hnab looj, thiab tshuab ntxhua khaub ncaws nruas):
Cov khoom yuav tsum tau ncab qhov tuag (li 5 - 10 zaug nws tuab). Elongation yog ib qho tseem ceeb tshaj plaws ntawm no-feem ntau ntau dua lossis sib npaug ntawm 28% yog xav tau (piv txwv li, DX54D thiab DC06 Galvanized chev). Tsis txaus elongation (piv txwv li, dx51d nrog tsuas yog 20%) tuaj yeem ua rau tsis txaus ntseeg, ua rau muaj kev sib sib zog nqus cov chaw sib sib zog nqus (piv txwv li, hauv qab fillets) thiab ua tsis tiav.
3.Qhov dab tsi yog cov txiaj ntsig ntawm elongation ntawm khoov?
Lub vojvoog me me / lub kaum sab xis loj khoov (piv txwv li, 180℃quav, r {} t bend, uas t yog tuab):
Cov khoom siv yuav tsum tau elongation siab (feem ntau loj dua los yog sib npaug rau 22%). Piv txwv li, kom ua tiav 180℃quav (khoov rouchant r {}} yas galvanized chev, lub elongation yuav tsum loj dua los yog sib npaug rau 25%. Yog hais tias elongation tsuas yog 18%, cov khoom sab hauv yuav tawg vim tias "Tsis tuaj yeem tiv thaiv kev tawm tsam (tsis tuaj yeem poob tawm vim yog kev ncab ntau dhau.
Lub vojvoog loj / me me me khoov (piv txwv li, 90℃khoov, r=2 t khoov):
Qhov kev xav tau elongation yog qis dua (ntau dua lossis sib npaug li 15%). Txawm hais tias siab - muaj zog galvanized chev nrog me ntsis qis elongation (piv txwv, elongation 18% -22%) tuaj yeem ua tiav tiav.
4.Qhov dab tsi yog cov txiaj ntsig ntawm elongation ntawm yob txoj kev ua?
Dov txoj kev koom nrog kev siv ntau txheej ntawm chais kom maj mam nias lub tiaj daim ntawv rau hauv ib qho c {{1} - zoo li cov channel zoo li qub). Thaum lub sijhawm cov txheej txheem no, cov khoom cuam tshuam rov qab tensile thiab compressive deformation. Lub luag haujlwm ntawm elongation yog los tiv thaiv kev tawg los ntawm kev ntxhov siab hauv ib cheeb tsam.
Yog tias Elongation tsis txaus (piv txwv li,<18%), the material is prone to edge cracking or uneven cross-sectional deformation at the "corners" (where stress is most concentrated) during rolling, leading to frequent production line downtime and adjustments.
Yog tias elongation raws cov qauv yuav tsum tau (piv txwv li, ntau dua lossis sib npaug ntawm 20%), cov khoom tuaj yeem tawm hauv cov neeg muaj kev ntxhov siab ntawm cov khoom siv tau yooj yim. Qhov kev loj elongation loj tuaj yeem txo qis cov ntawv ntsuas, tshwj xeeb yog rau seem no {}}}} tsim ntu (xws li photovoltaic nkhaus).
5.Txoj kev ua cov teeb meem uas ua tau ntawm qhov tsis txaus elongation?
Kev tawg pleb: kev tawg rau hauv qab thaum sib sib zog nqus kos thiab tawg ntawm cov ces kaum thaum khoov yog qhov ncaj qha ntawm tsis ua haujlwm.
Zinc Zaubqhw: Thaum cov khoom siv cov plasticity tsis txaus, qhov deformation ntawm zinc txheej thiab cov khoom hauv paus tsis phim. Tom qab khoov lossis ncab, txheej zinc txheej thiab poob, poob nws txoj kev tiv thaiv corrosion.
Kev siv hluav taws xob ntau dhau: Tom qab cov khoom lag luam tsis tuaj yeem tswj lub kaum sab xis (piv txwv li, yuav tsum tau kho dua tshiab rau 95 degree) thiab txo qis kev ua tau zoo.
Kev tsis zoo qhov tseeb: thaum lub zog ncab lossis dov, tsis sib xws tuaj yeem ua rau muaj kev sib txawv hauv zos, ua rau muaj kev sib txawv hauv zos thiab tsis ua tiav kom tau raws li kev sib dhos.