Taug qab Bolt Cov Khoom Sib Piv: Carbon, Stainless & Alloy Steel Screws
Taug qab screws thiabboltstuav lub rail fastening system ua ke thiab hloov load rau hauv lub sleeper. Lawv ntsib qhov siab - zaus vibration, hnyav qag loads thiab huab cua hnyav, yog li cov khoom xaiv ncaj qha txiav txim siab txog kev nyab xeeb thiab kev pabcuam lub neej. Peb tsev neeg cov khoom muaj zog: carbon steel, stainless hlau thiab hlau alloy.
1. Carbon Steel (Q235, 45#)
- Nta:Tus nqi qis, lub zog nruab nrab (tensile Ntau dua lossis sib npaug ntawm 400 MPa), ua haujlwm yooj yim.
- Kev txwv:xeb yooj yim; yuav tsum tau galvanizing (feem ntau 5-15 µm txheej ib GB / T 13912) los yog blackening.
- Siv:zoo tib yam khiav kho, sidings, theem nrab kab thiab dav fastening.
2. Stainless hlau (304, 316)
- Nta:muaj zog corrosion kuj - 316 stainless feem ntau tshaj 500 teev nyob rau hauv ASTM B117 ntsev tsuag nrog rau kev ntsuam xyuas - haum rau av noo, ntug hiav txwv dej thiab tshuaj lom neeg aggressive ib puag ncig.
- Kev txwv:Lub zog qis dua cov hlau alloy (304 tensile Ntau dua lossis sib npaug ntawm 515 MPa), tus nqi siab dua.
- Siv:ntug hiav txwv railways, tunnels, thaj chaw ntub dej, corrosion-sensitive applications.
3. Alloy hlau (40Cr, 35CrMo)
- Nta:siab zog tom qab quenching thiab tempering (40Cr tensile Ntau dua los yog sib npaug rau 980 MPa ib GB / T 3077; 35CrMo zoo ib yam nrog zoo toughness), zoo heev qaug zog kuj.
- Kev txwv:Kev kho cua sov yuav tsum tau ua, cov nqi ua haujlwm ntau dua.
- Siv:siab- txoj kev tsheb ciav hlau ceev, hnyav- cov kab tsheb thauj mus los, kev tawm mus thiab siab - cov ntsiab lus nrawm nrawm.
Lub rooj sib piv
| Khoom siv | Tensile (min) | Corrosion Resistance | Nqi | Hom kev siv |
|---|---|---|---|---|
| Q235 / 45 # (carbon) | Ntau tshaj lossis sib npaug li 400 MPa | Tsawg (yuav tsum tau txheej) | Tsawg | General kev txhim kho |
| 304 / 316 stainless hlau | Ntau dua lossis sib npaug li 515 MPa | Siab (316> 500 h ntsev tsuag) | Siab | Humid / ntug dej hiav txwv / corrosive |
| 40Cr / 35CrMo (qhuav, Q + T) | Ntau dua lossis sib npaug li 980 MPa | Medium (coating pom zoo) | Siab tshaj | Siab -ceev thiab hnyav-load |
Qib Qib thiab Qhov Loj
Qhia cov qib zog, tsis yog cov khoom siv xwb: 8.8 thiab 10.9 qib yog ib txwm siv rau cov bolts; qib txhais cov ntaub ntawv pov thawj load thiab zawm torque.
Qhov ntau thiab tsawg ntawm xov rau cov ntsia hlau thiab cov ntsia hlau: M16-M30; paub meej daim ntawv xov (metric, nti lossis rail-specific) thiab ntev tiv thaiv daim duab.
Preload tswj: siv torque-tswj nruj; nyob rau hauv - torqued pob qij txha loosen nyob rau hauv kev co, tshaj - torqued pob qij txha yuav raug xov stripping.
Kev kho saum npoo
- Galvanizing (HDG):5-15 µm rau 45-85 µm nyob ntawm tus qauv - kev tiv thaiv tsis zoo rau cov hlau.
- Dub (Oxide):nyias, qis- nqi, kev pabcuam sab hauv tsev nkaus xwb.
- Zinc flake (Dacromet- hom):corrosion kuj zoo heev yam tsis muaj hydrogen -embrittlement txaus ntshai rau siab - lub zog fasteners.
Nco tseg: siab- lub zog bolts (10.9+) yuav tsum zam cov txheej txheem uas qhia txog hydrogen embrittlement tshwj tsis yog tswj tau (ci- tawm ntawm ib tus qauv).
Cov ntsiab lus xaiv
- Kev pabcuam dav dav: galvanized 45 # lossis Q235 bolts, qib 8.8.
- Corrosive ib puag ncig: stainless 304/316 (xyuas lub zog vs load).
- Siab -ceev / hnyav-load: 40Cr lossis 35CrMo quenched thiab tempered, qib 10.9, nrog zinc-flake lossis txheej txheej.
Tau txais daim ntawv Quote rau Track Bolts
Kev xaiv ntawm carbon steel, stainless hlau, thiab alloy steel khiav bolts nyob ntawm qhov yuav tsum tau muaj zog, corrosion kuj, fastening load, thiab kev khiav hauj lwm ib puag ncig.GNEE RAILcov khoom siv taug qab bolts nyob rau hauv cov ntaub ntawv sib txawv, qib, qhov ntev, thiab kev kho saum npoo rau kev tsheb ciav hlau fastening systems, nrog rau specifications muaj raws li qhov project yuav tsum tau.
