Hauv kev lag luam xws li kev tsim khoom, tsheb, tsheb thauj mus los, thiab cov khoom siv hluav taws xob, siab - kev ua tau zoo fasteners, xws li ob - xaus studs thiab ob - xaus threaded bolts, tsis tsuas yog ua haujlwm tseem ceeb ntawm kev sib txuas, tab sis kuj yuav tsum muaj kev ruaj ntseg ruaj khov nyob rau lub sij hawm ntev nyob rau hauv complex loads, corrosive ib puag ncig, thiab kev co. Lawv qhov kev ua tau zoo yog nyob ntawm qhov microstructure sab hauv ntawm cov khoom, thiab kev kho cua sov yog cov txheej txheem tseem ceeb rau kev tswj cov microstructure no thiab tso tawm cov khoom muaj peev xwm. Kab lus no systematically elucidates cov hauv paus ntsiab lus, hom tseem ceeb, thiab cov kev siv tseem ceeb ntawm kev kho cua sov hauv kev tsim khoom fastener.
Qhov Tseem Ceeb thiab Lub Hom Phiaj ntawm Kev Kho Hniav Kub
Kev kho cua sov yog txheej txheem txheej txheem uas, yam tsis muaj kev hloov pauv ntawm lub workpiece lub geometry, precisely tswj peb theem ntawm cua sov, tuav, thiab txias los kho cov qauv sab hauv ntawm cov hlau los yog hlau, yog li tau txais cov khoom xav tau, kev ua haujlwm, lossis kev pabcuam lub neej. Rau siab - zog ob- xaus threaded tuav, lub hom phiaj tseem ceeb ntawm kev kho cua sov muaj xws li: txhim kho lub zog thiab hardness, txhim kho toughness, tshem tawm cov txheej txheem kev ntxhov siab, stabilizing qhov ntev, thiab muab cov qauv matrix haum rau kev kho mob tom ntej (xws li electroplating thiab phosphating).
Kev faib tawm tseem ceeb thiab cov xwm txheej siv tau ntawm kev kho cua sov
Raws li cov txheej txheem lub hom phiaj, kev kho cua sov tuaj yeem muab faib ua kev npaj kho cua sov thiab kev kho cua sov zaum kawg. Cov qub, xws li annealing thiab normalizing, feem ntau yog siv los txhim kho machinability lossis nteg lub hauv paus microstructure rau kev kho cua sov zaum kawg; lub tom kawg, xws li quenching thiab tempering, ncaj qha imparts cov khoom uas yuav tsum tau rau ib feem ntawm kev pab cuam lub neej.
Raws li daim ntawv thov, nws tuaj yeem muab faib ua kev kho cua sov tag nrho thiab kev kho cua sov saum npoo. Kev kho cua sov tag nrho yog tsim rau cov fasteners uas xav tau kev ua haujlwm zoo ib yam thoob plaws tag nrho cov ntu ntu, xws li Equal Double Threaded Stud; Thaum tshav kub kub kho yog siv los ua kom tiav qhov kev ua tau zoo ntawm "nyuaj rau ntawm qhov chaw thiab tawv rau sab hauv", uas feem ntau pom nyob rau hauv cov fasteners raug cuam tshuam los yog hnav.
Kev kho cua sov saum npoo: Ua kom muaj nuj nqi gradient
Rau ob - xov bolts xav tau ob qho tib si siab qaug zog thiab hnav- resistant nto, kev kho cua sov saum npoo yog cov kev daws teeb meem zoo tshaj:
Induction Hardening: Ceev ceev cov xov hauv paus los yog shank nto siv electromagnetic induction, ua raws li cov kua quenching. Haum rau nruab nrab - carbon alloy steel ob - xaus hex bolts, txhim kho qaug zog tiv thaiv hauv cheeb tsam threaded yam tsis hloov cov tub ntxhais toughness.
Kev kho cua sov (xws li carburizing): Cua sov tsawg- carbon steel fasteners nyob rau hauv cov pa roj carbon - nplua nuj huab cua tso cai rau carbon atoms nkag mus rau saum npoo, ua raws li los ntawm quenching thiab qis- kub tempering los ua ib tug siab - carbon martensitic hard plhaub thiab qis - carbon tawv core. Feem ntau siv rau hauv ob npaug - xaus lub tsheb thauj khoom bolts raug hloov pauv.
Kev txiav txim siab cuam tshuam ntawm kev kho cua sov ntawm Fastener Performance
Cov qib mechanical ntawm niaj hnub siab -kev ua tau zoo fasteners (piv txwv li, 8.8, 10.9, 12.9) yog qhov tseem ceeb ntawm kev tshwm sim sab nraud ntawm cov txheej txheem kho cua sov. Cov bolts uas tsis muaj kev kho cua sov feem ntau muaj lub zog tensile qis dua 600 MPa, thaum ob npaug - xaus threaded fasteners uas tau ua kom zoo dua quenching thiab siab - kub tempering tau yooj yim ncav cuag tshaj 1000 MPa, thaum tuav ib tug elongation ntawm ntau tshaj 9%, ua tau raws li cov kev nyab xeeb kev ua hauj lwm yuav tsum tau nyob rau hauv sh
Tsis tas li ntawd, kev kho cua sov ncaj qha cuam tshuam rau hydrogen embrittlement susceptibility, kev nyuaj siab corrosion cracking nyiam, thiab seem stability. Yog li, los ntawm kev xaiv cov khoom siv raw thiab cov cua kub qhov chaw rau kev tswj qhov nruab nrab, txhua kauj ruam yuav tsum nruj me ntsis ua raws li cov qauv (xws li ISO 898 thiab GB / T 3098) kom ntseeg tau tias cov khoom sib xws.
Kev kho cua sov, ua tus choj ntawm cov ntaub ntawv kev tshawb fawb thiab kev siv engineering, yog ib qho tseem ceeb uas tsis tuaj yeem hloov pauv hauv kev tsim cov khoom siv siab - kawg fasteners. Txawm hais tias nws yog cov ntsia hlau txhuas los yog dual- qhov kawg fastener, lawv cov kev pabcuam txhim khu kev qha yog nyob ntawm kev tswj hwm ntawm peb lub ntsiab lus tseem ceeb: cua sov, tuav, thiab txias. Nyob rau hauv lub neej yav tom ntej, nrog rau kev txhim kho kev txawj ntse tsim thiab txheej txheem digitalization, cov txheej txheem kho cua sov yuav hloov zuj zus mus rau qhov tseeb, traceability, thiab kev siv hluav taws xob tsawg, tsis tu ncua kev txhawb nqa siab - kev txhim kho zoo ntawm Tuam Tshoj cov khoom tsim kev lag luam.
Yog tias koj xav kom nkag siab tob ntxiv ntawm cov txheej txheem tempering rauob - xaus qhov (socket) screws, lossis lawv cov tswv yim kho cua sov kom tsis txhob npau taws, thov hu rau peb -peb yuav muab kev txhais lus thiab kev txhawb nqa rau koj.
Tiv tauj peb
