1.Puas yield plateau txias-rolled coil ua rau deg tsis xws luag?
Phenomenon: Nyob rau saum npoo ntawm lub workpiece tsim, wavy wrinkles los yog kab txaij tshwm sim, faib ntawm kwv yees li 45℃lub kaum sab xis rau lub hauv paus kev ntxhov siab axis. Cov kab txaij no, thaum cuam tshuam cov tsos, tuaj yeem ua rau cov khoom seem, tshwj xeeb tshaj yog pom tom qab pleev xim.
Ua rau: Cov yas deformation theem sib thooj rau cov qoob loo toj siab yog qhov tsis yog -cov yas deformation, uas ua rau deformation kab txaij hu ua "Lüders bands" lossis "slip kab" hauv thaj chaw hauv cheeb tsam. Thaum cov khoom raug stamped, cov hlua khi no tshwm rau ntawm qhov chaw ua haujlwm, ua rau pom qhov tsis xws luag.
2.Nws cuam tshuam li cas molding stability?
Vim hais tias lub deformation nyob rau hauv lub yield toj siab yog tam sim ntawd thiab tsis ncaj ncees lawm, cov ndlwg ntawm cov khoom nyob rau hauv pwm yuav ua uncontrolled, ua rau cov txheej txheem nyuaj.
3.Nws cuam tshuam li cas rau molding txwv?
Txawm hais tias cov qoob loo toj siab nws tus kheej tsis ncaj qha ua rau tawg, kev kho tsis raug cai tau ua los tshem tawm nws tuaj yeem qhia cov teeb meem tshiab. Piv txwv li, yog hais tias lub leveling elongation teem kom tshem tawm cov yield plateau loj heev, nws yuav tsim kom muaj kev ua hauj lwm tshiab hardening, ua rau cov yield txwv thiab ua rau nws yooj yim dua rau cov khoom tawg (crackle) thaum sib sib zog nqus nqus.
4.Nws cuam tshuam li cas ntawm cov kab rov tav folds?
Txias -rolled coils nrog lub yield plateau tuaj yeem tsim qhov kev hloov pauv hloov pauv hu ua "transverse crease" ntawm lawv qhov chaw yog tias muaj kev ntxhov siab ntau dhau thaum kev ua haujlwm tom ntej lossis kev thauj mus los (xws li thaum dhau los ntawm kev nro rolls), ua rau daim ntawv zoo li qub.
5.Lub hom phiaj ntawm cov txheej txheem leveling (tempering thiab tempering) yog dab tsi?
Los ntawm kev siv feeb txias deformation, dislocations pinned los ntawm carbon thiab nitrogen atoms yog tso tawm, yog li tshem tawm qhov pom tseeb yield point thiab ua rau kev ntxhov siab -strain nkhaus smooth thiab nruam.
Yog hais tias lub flattening elongation tsis txaus, lub yield plateau tsis tuaj yeem tshem tawm tag nrho, thiab tensile strain marks tseem yuav tshwm sim rau ntawm qhov chaw thaum stamping.
Yog hais tias lub flattening elongation loj dhau lawm, raws li tau hais ua ntej, nws yuav ua rau kev ua haujlwm tshiab, ua rau cov khoom siv brittleness.