Yog tias koj saib ze ntawm txhua lub taub hau taub hau, koj yuav pom cov qhab nia xws li 4.8, 8.8, 10.9 thiab 12.9. Cov lej no sawv cev rau qib mechanical zog ntawm fasteners raws li ISO 898 thiab GB / T 3098 tus qauv. Cov qib sib txawv txhais tau hais tias cov khoom siv hlau sib txawv, cov txheej txheem kho cua sov, thauj khoom- cov kabmob muaj peev xwm thiab kev siv ib puag ncig. Xaiv qhov raug bolt qib yog qhov tseem ceeb rau cov khoom siv kev nyab xeeb, kev ruaj ntseg thiab kev tswj tus nqi.
Bolt Grade Numbers txhais li cas?
Txoj cai kos cim yog universal hauv kev lag luam fastener:
• Thawj tus lej sawv cev rau 1/100 ntawm qhov tsawg kawg nkaus tensile zog (MPa).
• Tus lej thib ob sawv cev rau qhov piv ntawm lub zog tawm los rau lub zog tensile.
Cov qib siab dua, qhov muaj zog hardness, nro kuj thiab qaug zog kuj.
1. Qib 4.8 (Low Strength / Civil Siv)
Qib 4.8 bolts yog ua los ntawm qis- carbon steel yam tsis muaj quenching lossis tempering kho. Lawv yog cov tsawg tshaj plaws - tus nqi fasteners rau lub teeb -load daim ntawv thov.
• Lub zog tensile: Ntau dua lossis sib npaug li 400 MPa
• Lub zog tawm los: Ntau dua lossis sib npaug li 320 MPa
• Khoom siv: Q235 / qis carbon steel
• Nta: zoo toughness, tsawg hardness, ua tau yooj yim, pheej yig tus nqi
• Daim ntawv thov: rooj tog zaum, txee, khoom siv hluav taws xob, qhov rooj thiab qhov rais, cov hlua khi yooj yim, kho hauv tsev zoo tib yam
2. Qib 8.8(Lub zog nruab nrab / Kev siv dav dav)
Qib 8.8 yog cov khoom siv dav siv ntau tshaj plaws. Ua nrog nruab nrab carbon steel thiab ua tiav quenching thiab tempering tshav kub kho, nws sib npaug zog, stability thiab nqi.
• Lub zog tensile: Ntau dua lossis sib npaug li 800 MPa
• Lub zog tawm los: Ntau dua lossis sib npaug ntawm 640 MPa
• Khoom siv: 45 # carbon steel
• Nta: kev ua haujlwm ruaj khov, zoo hnav tsis kam, haum rau feem ntau cov qauv siv tshuab
• Daim ntawv thov: cov tshuab dav dav, cov qauv hlau, cov khoom siv, cov kav dej, cov tsheb tsis yog -cov khoom tseem ceeb
3.Qib 10.9(High Strength / Heavy Industry Siv)
Qib 10.9 belongs rau siab -lub zog alloy steel fasteners. Nrog kev kho cua sov nruj, nws muab kev tiv thaiv zoo tshaj - kev co, tiv thaiv - qaug zog thiab tiv thaiv - kev ua haujlwm deformation hauv qab hnyav.
• Lub zog tensile: Ntau dua lossis sib npaug li 1000 MPa
• Lub zog tawm los: Ntau dua lossis sib npaug li 900 MPa
• Khoom siv: hlau alloy (40Cr, 35CrMo)
• Nta: siab hardness, muaj zog tension resistance, ntev kev pab cuam lub neej nyob rau hauv tas li hnyav load
• Daim ntawv thov: engineering machinery, tsheb chassis, railway khoom, loj steel qauv, siab hlab ntsha
4.Qib 12.9(Ultra-High Strength / Precision Heavy Load)
Qib 12.9 yog qib siab tshaj plaws ntawm cov qauv metric bolts. Ua los ntawm qib siab -qib alloy structural steel nrog qhov kub thiab txias- tswj kev kho cua sov, nws muaj kev ruaj ntseg zoo heev.
• Lub zog tensile: Ntau dua lossis sib npaug ntawm 1220 MPa
• Yield zog: Ntau dua los yog sib npaug rau 1080 MPa
• Khoom siv: siab-zoo chromium-molybdenum alloy steel
• Nta: ultra-siab hardness, cuam tshuam tsis kam, tawg tsis kam, siab tshaj plaws kev nyab xeeb
• Daim ntawv thov: pwm, khoom siv hydraulic, hnyav engineering tsheb, siab -vibration machinery, precision industrial khoom
Qib Kev Sib Piv Txheej Txheem
• 4.8: Tsawg zog, lub teeb load, pej xeem thiab cov khoom siv dav dav
• 8.8: Lub zog nruab nrab, universal industrial standard
• 10.9: Siab zog, hnyav machinery thiab structural engineering
• 12.9: Ultra-siab zog, precision thiab huab ua hauj lwm tej yam kev mob
Vim li cas xaiv qib raug yog qhov tseem ceeb
Kev siv cov- qib qis ntawm cov khoom hnyav- cov khoom siv thauj khoom yuav ua rau xoob, zawv zawg xov lossis ntsia liaj qhov rooj tawg, ua rau muaj kev phom sij loj heev.
Siv ultra-siab- qib bolts rau lub teeb zoo tib yam- cov qauv thauj khoom yuav ua rau cov nqi tsis tsim nyog.
Peb lub Hoobkas muaj zog
Raws li cov kws tshaj lij kev tsim khoom hauv Suav teb, peb muab tag nrho - qib bolts ntawm 4.8, 8.8, 10.9 txog 12.9. Tag nrho cov khoom xeem dhau nruj hardness kuaj, tensile xeem thiab dimension soj ntsuam. Peb txhawb nqa tus qauv DIN / ISO / ANSI bolts thiab customized tsis yog - tus qauv fasteners rau thoob ntiaj teb kev lag luam tej yaam num.