Kev sib raug zoo ntawm cov phaj steel thickness thiab hardness tsis yog txoj kev sib txheeb yooj yim; Nws yog cuam tshuam ncaj qha los ntawm cov txheej txheem ntau lawm (tshwj xeeb yog cov khaub thuas txias thiab annealing cov txheej txheem). Qhov no tuaj yeem txheeb xyuas los ntawm kev xav hauv qab no:
1. Thaum lub sijhawm txias cov txheej txheem: tuab thiab hardness yog ncaj qha tsis zoo (vim deformation).
Thaum lub sij hawm lub caij txias rolling (ua ntej annealing), qhov hloov hauv phaj steel tuab yog txiav txim siab los ntawm Rolling deformation:
Tom qab ntau tus txias txias hla dhau, cov tuab ntawm thawj steel phaj (xws li kub}}}}}} ish, "txo") nce ntxiv.
Qhov ntau dua deformation, ntau cov nplej nyob hauv cov hlau yog elongated thiab pluav, nce kev ua haujlwm ntau ntxiv thiab ua rau ua haujlwm tawv, ua rau muaj kev nyuaj siab ntau dua.
Yog li ntawd, nyob rau hauv lub txias -}}}} rolled (unannealed (unannealed (unannealed (unatealed) lub xeev, thinner steel daim hlau los ntawm tib lub catch feem ntau muaj ntau dua hardness. Piv txwv li:
Ib lub phaj steel nrog ib qho qub tuab ntawm 3mm, thaum txias -}}}}} dua li 2 hli, muaj ib nyuag qhov nyuaj dua nws lub xeev qub.
Txuas ntxiv cov dov txias rau 1 hli, qhov deformation nce, ntxiv mus ntxiv rau cov annalness thiab hardness tsis muaj zog (nyob ntawm cov txheej txheem anealing).
Txias -} rolled steel ntawv feem ntau yuav tsum muaj annealing (piv txwv li cov annealing ua haujlwm) kom tshem tawm cov haujlwm ua haujlwm thiab rov ua haujlwm. Txij ntawm no, kev sib raug zoo ntawm cov tuab thiab hardness yog yeej los ntawm anealing txheej txheem:
Annealing kub thiab sijhawm txiav txim siab kawm qib siab: Thaum qhov ntsuas kub tau muab tshem tawm kom txaus thiab lub sijhawm ua haujlwm txaus
Txij ntawm no, yog tias cov nplooj ntawv hlau los ntawm tib pawg tab sis cov txheej txheem tuab sib txawv txo qis, thiab cov nyhuv ntawm cov tuab ntawm hardness yog txo.
Piv txwv li, txias - rolled steel ntawv ntawm 1mm thiab 2 hli thiab 20 {hv) tom qab tib pab txheej txheem anealing. Cov nyhuv ntawm cov tuab ntawm hardness yog ntau me dua nyob rau hauv lub xeev txias-rolled no. 3. muaj kev zam rau cov qib steel lossis cov txheej txheem sib txawv.
Yog tias cov tuab tuab ntawm cov phiaj hlau sib txawv tseem ceeb (piv txwv li ultra - daim hlau nyias<0.3mm and thick plates >5 hli), qhov sib txawv hauv kev hloov kho cua sov thaum lub pob thinner, thiab qis me ntsis qis dua li cov phiaj tawv tuab dua (qhov no yog nyob ntawm cov txheej txheem tshwj xeeb).
Rau qee qhov tshwj xeeb kho cov phiaj hlau steel (xws li nto nto leenching), thickness yuav cuam tshuam cov khoom siv tawv tawv, thiab yog li qhov sib txawv hauv kev tawv thiab tub ntxhais. Txawm li cas los xij, qhov no yog lub zog hardness variation thiab tsis yog ncaj qha ntawm txhua qhov tuab thiab hardness.
Lub ntsiab
Thaum txias dov tsis muaj annealing: tuab thiab hardness yog indirectly ntsig txog {}} lub thickness), ntau dua deformness (siab dua lub hardness.
Tom qab annealing: cov nyhuv ntawm cov tuab ntawm kev tawv txo qis, thiab lub hardness yog feem ntau txiav txim siab los ntawm anealing txheej txheem (qib ntawm recrystallization). Hardness tuaj yeem sib thooj thoob plaws tib lub pob ntawm cov phiaj hlau ntawm kev sib txawv.
Yog li, cov phaj steel thickness nws tus kheej tsis ncaj qha txiav txim siab hardness. Hloov chaw, nws tsis ncaj rau hardness los ntawm nws cov cawv ntawm rolling deformation thiab annealing uniformity. Cov ntsiab lus tseem ceeb tseem ceeb nyob ua haujlwm ua haujlwm tawv thiab qib kev rov ua haujlwm.