Ngaphambi kokubekaimibhobho yentsimbi echanekileyoemarikeni, imifuniselo yezandla kufuneka yenziwe, kwaye umzi-mveliso wethu wemibhobho yentsimbi echanekileyo unecandelo elizinikeleyo lovavanyo.Ngenxa yokuba eyona marike iphambili yokuchaneka kwemibhobho yentsimbi ngumsebenzi wobunzima bokwakha.Kodwa lo msebenzi unemfuno ephezulu yokuqina kokuqina kwemibhobho yentsimbi echanekileyo, ke singawaphucula njani amandla okuqina okuchaneka kwemibhobho yentsimbi eyenziwe ngamagalvanized?Ngoku makhe siwazise kuthi.
Phezulu kuluhlu, imibhobho yentsimbi echanekileyo inokuvavanywa kusetyenziswa uvavanyo lwangoku lwe-eddy endaweni yovavanyo lwe-hydraulic.Uxinzelelo lovavanyo okanye i-eddy yangoku yovavanyo lwereferensi yobungakanani besampula kufuneka ihambelane nemithetho ye-GB 3092. Umsebenzi womatshini wentsimbi yinjongo ebalulekileyo yokuqinisekisa ukusetyenziswa kwayo kokugqibela (umsebenzi womatshini), oxhomekeke kukwakheka kweekhemikhali kunye neendlela zonyango lobushushu. intsimbi.Kumgangatho wombhobho wentsimbi, ngokweemfuno ezahlukeneyo zesicelo, umsebenzi wokolula (uchaneka, umbhobho wentsimbi echanekekileyo, amandla emveliso okanye ukuchaneka kombhobho wentsimbi, ukunwenwa), ukuqina kunye neenjongo zokuqina, kunye nemisebenzi ephezulu nephantsi yobushushu obufunwa ngabasebenzisi. , zichaziwe.
Okwesibini, amandla okuqina okuchaneka kwemibhobho yentsimbi eyenziwe ngamatye ( σ b) Awona mandla aphezulu (Fb) athwalwa ngulo mzekelo ngexesha lenkqubo yokuqina ngexesha lokwaphuka, efunyenwe kwindawo yokuqala enqamlezileyo (Ngoko) yomzekelo. ), Ibizwa ngokuba ngamandla okuqina okuchaneka kwemibhobho yentsimbi eyenziwe ngamazimba ( σ b) , kwi-N/mm2 (MPa).Ibonisa amandla obuninzi bezinto zetsimbi ukuxhathisa umonakalo phantsi kwemiphumo ye-tensile.Kwifomula: Fb - amandla amaninzi athathwe ngumfanekiso ngexesha lokuphuka, N (Newton);Ngoko ke - Indawo yokuqala yecandelo lomnqamlezo wesampuli, mm2.Umbhobho wensimbi ochanekileyo ochanekileyo: izinto zetsimbi ezinento yokuvelisa, kunye noxinzelelo apho i-specimen ingaqhubeka ikhula ngaphandle kokongeza amandla (ukugcina uzinzo) ngexesha lenkqubo yokwelula, ibizwa ngokuba yipayipi yensimbi echanekileyo.Ukuba amandla ehla, imibhobho yentsimbi echanekileyo ephezulu nasezantsi kufuneka yahlulwe.Iyunithi yombhobho wensimbi echanekileyo yi-N / mm2 (MPa).Umbhobho wensimbi ochanekileyo ophezulu: Uxinzelelo oluphezulu ngaphambi kokuncipha kokuqala kwamandla ngenxa yokugoba kwesampuli;Umbhobho wensimbi ochanekileyo ophantsi: Ubuncinci boxinzelelo kwisigaba sokuvuna xa umphumo wokuqala wangoko ungaqwalaselwa.Kwifomula: Fs - ukugoba amandla ngexesha lenkqubo yokuqina komzekelo (ozinzile), N (Newton) Ngoko - indawo yokuqala ye-cross-sectional ye-specimen, mm2.Ukwandiswa emva kokwaphuka: ( σ) Kumfuniselo we-tensile, ipesenti yobude obudityanisiweyo kubude begeyiji yomzekelo emva kokuqhawuka xa kuthelekiswa nobude begeyiji yokuqala ibizwa ngokuba ngubude.
Okwesithathu, ngo σ Ibonisa ukuba iyunithi yi%.Kwifomula: ubude be-L1-gauge yesampuli emva kokuphuka, mm;L0- Ubude begeyiji yoqobo yesampulu, mm.Izinga lokunciphisa icandelo: ( ψ) Kuvavanyo lwe-tensile, ukuncitshiswa okuphezulu kwindawo enqamlezileyo kwi-diameter encitshisiweyo ye-specimen emva kokuphulwa kubizwa ngokuba yipesenti yendawo yokuqala ye-cross-sectional, ebizwa ngokuba yi-cross-sectional reduction rate. .ngo-ψ Ibonisa ukuba iyunithi yi%.Kwifomula: S0- Indawo yokuqala yecandelo lomnqamlezo wesampuli, mm2;I-S1- Indawo encinci ye-cross-sectional kwi-diameter encitshisiweyo ye-specimen emva kokuphuka, mm2.Ithagethi yokuqina: Ukukwazi kwezixhobo zetsimbi ukuxhathisa ukunyanzeliswa kwezinto ezinzima kumphezulu kubizwa ngokuba lukhuni.Ngokweendlela ezahlukeneyo zovavanyo kunye noluhlu lwezicelo, ubulukhuni bunokwahlulwa kwakhona bububunzima beBrinell, ukuqina kweRockwell, ukuqina kweVickers, ukuqina konxweme, ubulukhuni obuncinci, kunye nobunzima obuphezulu bobushushu.Kukho iintlobo ezintathu eziqhelekileyo ezisetyenziswayo zemibhobho: iBrinell, Rockwell, kunye nokuqina kweVickers.Ukuqina kweBrinell (HB): Ukusebenzisa ibhola yentsimbi edayamitha ethile okanye ibhola yealloyi eqinileyo
Ixesha lokuposa: Jul-10-2023