1.Dab tsi yog "hardness txawv nyob rau hauv tib lub kauj"? Vim li cas nws yog qhov ntsuas qhov tseem ceeb rau txias -rolled coils?
"Intra-coil hardness txawv" yog hais txog qhov sib txawv ntawm qhov siab tshaj plaws thiab qhov tsawg kawg nkaus hardness qhov tseem ceeb ntawm qhov chaw sib txawv nyob rau hauv tib lub steel kauj (tshwj xeeb tshaj yog qhov pib, nruab nrab, thiab xaus, nrog rau cov npoo thiab nruab nrab ntawm qhov dav ntawm qhov kev taw qhia).
Nws yog qhov tseem ceeb vim tias:
Nws cuam tshuam rau kev ua haujlwm qis qis: Yog tias qhov nyuaj ntawm tib lub kauj hloov pauv tau zoo heev, cov neeg siv hauv qab (xws li cov nroj tsuag stamping) yuav ntsib teeb meem loj thaum kho lawv cov tuag. Kev teeb tsa tsis haum rau thaj chaw mos yuav ua rau tawg hauv qhov chaw tawv; conversely, kev teeb tsa tsis haum rau cov cheeb tsam nyuaj yuav ua rau wrinkling hauv cov chaw mos. Qhov no cuam tshuam ncaj qha rau kev tawm los thiab kev ua haujlwm ntawm stamping ntau lawm.
Nws qhia txog theem ntawm kev tswj cov txheej txheem: Hardness yog ib qho kev xav txog ntawm cov khoom siv tshuab. Lub intra-coil hardness sib txawv ncaj qha qhia txog kev tswj qhov kub thiab txias, nro, thiab deformation uniformity thoob plaws hauv tag nrho cov txheej txheem los ntawm kub dov mus rau txias dov thiab annealing. Qhov sib txawv me me, qhov ruaj khov ntawm cov txheej txheem ntau lawm thiab qhov muaj zog ntawm kev tswj xyuas muaj peev xwm.
Nws ua haujlwm raws li qhov pib rau siab -kawg daim ntawv thov: Rau siab- cov khoom kawg xws li cov tsheb sab nrauv thiab cov khoom siv hauv tsev, cov neeg siv feem ntau muaj cov kev cai tshwj xeeb rau cov intra-coil hardness txawv (xws li, yuav tsum tau tswj nyob rau hauv ± 5 hardness units). Kev ua tsis tau raws li cov qauv no yuav tiv thaiv kev xa khoom.
2.Dab tsi yog lub hauv paus ua rau qhov sib txawv ntawm hardness nyob rau hauv tib lub yob?
Qhov kub tsis sib xws (thawj qhov ua rau): Thaum lub tswb nrov - hom lossis nruam annealing, cov cua kub thiab cua txias sib txawv nyob rau ntau qhov chaw ntawm cov hlau kauj.
Lub taub hau-tail sib txawv: Lub taub hau thiab tus Tsov tus tw ntawm cov hlau kauj yog nyob rau hauv kev sib cuag ncaj qha nrog cov cua thiab cua sov sai sai; lub core heats maj mam. Lub sij hawm tuav tsis txaus ua rau cov qoob loo loj hlob tsis txaus hauv cov tub ntxhais, ua rau muaj zog dua; thaum lub taub hau thiab tus Tsov tus tw muaj coarser nplej thiab qis hardness.
Ntug- qhov sib txawv nruab nrab: Cov npoo ntawm cov sawb dissipate tshav kub sai, ua rau qis qis; qhov chaw dissipates cua sov maj mam, ua rau kub siab dua. Qhov kub gradient no ua rau lub hardness faib qhov twg cov npoo yog tawv thiab qhov chaw yog mos.
Kev sib cais ntawm cov tshuaj lom neeg: Thaum lub sij hawm nruam nruam hauv steelmaking, cov khoom sib cais (xws li carbon thiab manganese accumulating nyob rau hauv qhov chaw) yuav tshwm sim thaum lub sij hawm solidification. Qhov kev sib xyaw ua ke no tau txais txiaj ntsig los ntawm cov khoom kawg, uas ua rau muaj kev hloov pauv ntawm cov theem sib txawv thiab qhov nyuaj ntawm cov micro- cov cheeb tsam sib txawv txawm tias muaj cov txheej txheem annealing tib yam.
Kev txo qis qis tsis sib xws: Yog tias cov khoom siv tuaj yeem muaj qhov tsis zoo ntawm tus ntoo khaub lig- ntu cov duab lossis cov kab nrib pleb tsis raug tswj xyuas kom zoo thaum lub sijhawm dov, qhov tseeb txias dov txo tus nqi ntawm cov ntsiab lus sib txawv raws qhov dav ntawm lub strip yuav tsis sib haum. Hauv cov cheeb tsam uas muaj qhov txo qis, kev ua haujlwm nyuaj yog qhov hnyav, thiab cov nplej yuav zoo dua tom qab recrystallization annealing, ua rau sib txawv hardness.
3.Hauv cov txheej txheem annealing, cov kev ntsuas tshwj xeeb twg tuaj yeem ua kom txo tau qhov sib txawv hardness nyob rau hauv tib lub yob?
Optimize cua sov thiab txias profiles (rau tswb- hom annealing):
Txuas lub sij hawm tuav: Xyuas kom cov tub ntxhais ntawm cov hlau kauj mus txog qhov kub ntawm lub hom phiaj, tso cai rau kev loj hlob ntawm cov qoob loo txaus thiab zoo ib yam.
Siv "tshaj - kev laus" kev kho mob: Khaws ib lub toj siab tshwj xeeb rau lub sijhawm kom cia cov carbides ua kom dej nag, txo cov tawv nqaij thiab tshem tawm cov kev laus tom ntej.
Tswj lub qhov cub cua ncig (rau lub tswb- hom annealing): Los ntawm kev ua kom zoo ntawm cov qauv ntawm cov ntawv qhia convection, xyuas kom muaj kev sib txawv ntawm cov pa tiv thaiv (hydrogen lossis nitrogen-hydrogen sib tov) hauv cov hlau kauj, yog li txhim kho qhov kub thiab txias sib npaug thiab txo qhov sib txawv hauv microstructure thiab hardness ntawm qhov sib txawv ntawm tib lub steel coil.
Tswj sawb kub uniformity (rau nruam annealing): Rau nruam annealing kab, meej tswj qhov txias siv ntawm lub cub tawg yob thiab lub hwj chim faib ntawm cov cua sov seem yuav tsum tau kom uniform kub ntawm lub sawb hla nws dav. Edge shielding thev naus laus zis tuaj yeem siv los txo qis overcooling lossis overheating ntawm cov npoo ntawm cov sawb.
4.Nrog annealing, cov txheej txheem leveling puas cuam tshuam qhov sib txawv hardness?
Muaj kev cuam tshuam ncaj qha. Txawm hais tias leveling (quenching thiab tempering dov) muaj qhov me me txias dov deformation, nws yog cov kauj ruam kawg hauv kev kho cov khoom siv kho tshuab.
Leveling elongation tswj: Leveling, los ntawm kev siv ib tug me me txo, induces ib tug npaum li cas ntawm kev ua hauj lwm hardening nyob rau hauv cov khoom. Kev hloov pauv loj hauv qhov elongation raws tag nrho qhov ntev (xws li, qis elongation thaum pib thiab xaus vim qhov kev zam ntawm weld) ncaj qha ua rau hardness fluctuations.
dabtsi yog khoov yob quab yuam teeb tsa: Lub bending yob quab yuam thaum lub sij hawm leveling cuam tshuam qhov kev ntxhov siab tis raws lub sawb dav. Kev khoov tsis zoo ntawm lub zog yob tuaj yeem ua rau muaj qhov sib txawv ntawm qhov tseeb deformation ntawm lub strip lub npoo thiab qhov chaw, qhia qhov sib txawv hardness tshiab raws qhov dav.
Kev them nyiaj rau cov khoom siv hardness hloov pauv: Niaj hnub nimno leveling tshuab tuaj yeem tau txais cov ntaub ntawv kwv yees ntawm cov khoom siv hardness thiab dynamically kho lub leveling rolling quab yuam kom "nqus tawm peaks thiab sau valleys" nyob rau hauv lub hardness fluctuations tshwm sim los ntawm yav dhau los txheej txheem.
5.Raws li tus kws tshaj lij txhim kho kom zoo, koj tuaj yeem txheeb xyuas thiab daws cov teeb meem cuam tshuam li cas rau qhov tsis sib xws ntawm qhov nyuaj ntawm tib lub yob?
Kauj Ruam 1: Qhov chaw thiab ntsuas. Ua ntej, txiav txim siab seb qhov sib txawv hardness tshwm sim raws li qhov ntev (lub taub hau, nruab nrab, thiab tus Tsov tus tw) lossis qhov dav (ntug / nruab nrab), thiab tau txais cov ntaub ntawv muaj tseeb hardness faib.
Kauj Ruam 2: Taug qab qhov kub -Rolled Raw Material. Tshawb xyuas qhov ntsuas kub ntawm cov coiling profile thiab hla -sectional outline ntawm qhov sib thooj kub-rolled coil. Yog tias qhov kub ntawm -rolling coiling kub hloov pauv ntau, los yog tus ntoo khaub lig- ntu qhia txog qhov txawv txav, qhov no yuav yog qhov teeb meem ntawm hardness.
Kauj Ruam 3: Txheeb xyuas cov txheej txheem Annealing. Muab cov ntaub ntawv ntsuas kub hauv keeb kwm ntawm lub qhov cub annealing thiab tshawb xyuas qhov sib txawv ntawm lub sijhawm cua sov thiab cov cua kub ntawm lub taub hau thiab tus Tsov tus tw ntawm cov hlau kauj. Rau lub tswb- hom furnaces, xyuas seb lub thermocouple insertion txoj hauj lwm yog qhov tseeb thiab seb nws puas cuam tshuam qhov kub ntawm qhov txias tshaj plaws ntawm cov hlau kauj.
Kauj Ruam 4: Txheeb xyuas qhov ntsuas qhov ntsuas. Tshawb xyuas seb tus nqi elongation tiag tiag ntawm lub tshuab leveling sib phim rau cov nqi teev, thiab seb puas muaj qhov tsis sib xws vim qhov sib txawv ntawm qhov nro.
Kauj Ruam 5: Siv cov kev txhim kho. Raws li kev txheeb xyuas cov lus xaus, kev txhim kho yuav suav nrog kev hloov kho cua sov ntawm lub tshuab hluav taws xob annealing, optimizing qhov kub -rolling coiling kub, los yog recalibrating lub leveling tshuab elongation tswj system. Tom qab kev txhim kho tau ua tiav, cov teebmeem tau lees paub los ntawm re-sampling.