Xov xwm - Taw qhia txog Lifting Chain ntawm Qib: G80, G100 & G120

Lifting chains thiab slingsyog cov khoom tseem ceeb hauv txhua qhov kev tsim kho, tsim khoom, mining, thiab offshore industries. Lawv qhov kev ua tau zoo hinges ntawm cov khoom siv science thiab meej engineering. Cov qib saw ntawm G80, G100, thiab G120 sawv cev rau qib siab zog ntau dua, txhais los ntawm lawv lub zog tensile yam tsawg kawg nkaus (hauv MPa) muab faib ua 10:

- G80: 800 MPa yam tsawg kawg nkaus tensile lub zog

- G100: 1,000 MPa yam tsawg kawg nkaus tensile zog

- G120: 1,200 MPa lub zog tensile yam tsawg kawg nkaus

Cov qib no ua raws li cov qauv thoob ntiaj teb (xws li ASME B30.9, ISO 1834, DIN EN818-2) thiab tau txais kev soj ntsuam nruj thiab kev sim kom ntseeg tau tias muaj kev ntseeg siab nyob rau hauv cov khoom hnyav, qhov kub thiab txias, thiab qhov chaw corrosive.

1. Cov Khoom Siv thiab Metallurgy: Kev Tshawb Fawb Tom Qab Lifting Chains Qib

Cov cuab yeej cuab tam ntawm cov lifting chains tshwm sim los ntawm kev xaiv cov alloy thiab kev kho cua sov.

Qib	Cov khoom siv hauv paus	Kev kho cua sov	Ntsiab Alloying Elements	Microstructural nta
G80	Nruab nrab-carbon steel	Quenching & Tempering	C (0.25-0.35%), Mn	Tempered martensite
G100	High-strength low-alloy (HSLA) hlau	Tswj quenching	Cr, Mo, V	Fine-grained bainite / martensite
G120	Advanced HSLA hlau	Precision tempering	Cr, Ni, Mo, micro-alloyed Nb/V	Ultra-zoo carbide dispersion

Vim li cas thiab vim li cas cov ntaub ntawv no tseem ceeb:

- Kev Txhim Kho Lub Zog: Alloying ntsiab (Cr, Mo, V) daim ntawv carbides uas impede dislocation txav, nce yield zog yam tsis muaj ductility.

-Fatigue Resistance: Fine-grained microstructures hauv G100 / G120 cuam tshuam kev pib tawg. G120's tempered martensite muaj lub neej qaug zog (> 100,000 cycles ntawm 30% WLL).

- Hnav Resistance: Surface hardening (xws li, induction hardening) hauv G120 txo kev puas tsuaj hauv cov ntawv thov kev sib txhuam zoo li mining draglines.

Welding Protocols for Chain Integrity

•Pre-Weld Prep:

o Ntxuav qhov sib koom ua ke kom tshem tawm cov oxides/cov kab mob.

o Ua ntej tshav kub rau 200 ° C (G100 / G120) los tiv thaiv hydrogen cracking.

•Vuam txoj kev:

o Laser Vuam: Rau G120 chains (piv txwv li, Al-Mg-Si alloys), ob-sided welding tsim fusion zones nrog H-shaped HAZ rau uniform kev ntxhov siab.

o Kub Hlau TIG: Rau boiler steel chains (xws li, 10Cr9Mo1VNb), multi-pass vuam minimizes distortion.

•Lub tswv yim tseem ceeb:Zam geometric tsis xws luag hauv HAZ - qhov chaw pib tawg loj hauv qab 150 ° C.

Tom qab Weld Heat Treatment (PWHT) Parameters

Qib	PWHT kub	Tuav Sijhawm	Microstructural Hloov	Kev txhim kho vaj tse
G80	550-600 ° C	2-3 teev	Tempered martensite	Kev ntxhov siab, + 10% cuam tshuam toughness
G100	740-760 ° C	2-4 teev	Zoo carbide dispersion	15% ↑ qaug zog, niaj hnub HAZ
G120	760-780 ° C	1-2 teev	Inhibits M₂₃C₆ coarsening	Tiv thaiv kom tsis muaj zog thaum kub kub

Ceev faj:Tshaj 790 ° C ua rau carbide coarsening → lub zog / ductility poob.

2. Lifting Chains Performance nyob rau hauv cov xwm txheej heev

Ib puag ncig sib txawv xav tau cov khoom siv kho kom haum.

Kub kam rau ua:

- G80:Kev ua haujlwm ruaj khov mus txog 200 ° C; nrog ceev zog poob siab tshaj 400 ° C vim tempering reversal.

- G100/G120:Chains khaws 80% lub zog ntawm 300 ° C; Cov qib tshwj xeeb (xws li, nrog Si / Mo ntxiv) tiv thaiv embrittlement mus rau -40 ° C rau kev siv arctic.

Corrosion Resistance:

- G80:Yooj yim rau xeb; yuav tsum tau nquag oiling nyob rau hauv qhov chaw ntub dej.

- G100/G120:Cov kev xaiv muaj xws li galvanization (zinc plated) lossis stainless-steel variants (xws li, 316L rau marine / tshuaj nroj tsuag). Galvanized G100 withstands 500+ teev nyob rau hauv kev ntsuam xyuas ntsev tsuag.

Fatigue thiab Impact Toughness:

- G80:Tsim nyog rau static loads; cuam tshuam toughness ≈25 J ntawm -20 ° C.

- G120:Exceptional toughness (> 40 J) vim Ni / Cr ntxiv; zoo tagnrho rau dynamic lifting (piv txwv li, shipyard cranes).

3. Daim Ntawv Thov Kev Xaiv Qhia tshwj xeeb

Xaiv cov qib uas yog optimizes kev nyab xeeb thiab nqi-efficiency.

Daim ntawv thov	Pom zoo Qib	Kev xav
Kev tsim kho dav dav	G80	Nqi-zoo rau nruab nrab loads / qhuav ib puag ncig; np., scaffolding.
Offshore / Marine Lifting	G100 (Galvanized)	Siab zog + corrosion kuj; resists dej hiav txwv pitting.
Mining / Quarrying	G120	Maximizes hnav tsis kam nyob rau hauv abrasive tuav; ciaj sia cuam tshuam loads.
Kub-kub (xws li steel zeb)	G100 (kub-kho variant)	Khaws lub zog ze rau qhov cub (txog 300 ° C).
Critical Dynamic Lifts	G120	Fatigue-resistant rau nyoob hoom qav taub nqa los yog rotating khoom installation.

4. Kev Tiv Thaiv Kev Tiv Thaiv thiab Kev Saib Xyuas Kev Ua Haujlwm tsis ua tiav

- Fatigue Failure:Feem ntau nyob rau hauv cyclic loading. G120's superior crack propagation resistance txo qhov kev pheej hmoo no.

- Corrosion Pitting:cuam tshuam lub zog; galvanized G100 slings kav ntev 3 × ntev nyob rau hauv ntug dej hiav txwv qhov chaw vs. uncoated G80.

- Kev tshuaj xyuas:ASME tswj xyuas txhua hli rau cov kab nrib pleb, hnav> 10% txoj kab uas hla, lossis elongation. Siv qhov sib nqus particle kuaj rau G100 / G120 txuas.

5. Txhawb kev tsim kho tshiab thiab cov kev xav yav tom ntej

- Ntse Chains:G120 chains nrog embedded strain sensors rau real-time load xyuas.

- Txheej:Nano-ceramic coatings ntawm G120 kom ntev kev pab cuam lub neej nyob rau hauv acidic ib puag ncig.

- Khoom siv Science:Kev tshawb fawb rau austenitic steel variants rau cryogenic nqa (-196 ° C LNG daim ntawv thov).

Xaus: Matching Chains Qib rau koj xav tau

- Xaiv G80rau tus nqi-rhiab, tsis-corrosive zoo li qub nqa.

- Qhia G100rau corrosive / dynamic ib puag ncig xav tau kev sib npaug zog thiab kav ntev.

- Xaiv rau G120nyob rau hauv tej yam kev mob: siab qaug zog, puas, los yog precision tseem ceeb lifts.

Cov Lus Cim Kawg: Ib txwm ua qhov tseem ceeb ntawm cov ntawv pov thawj uas tau lees paub nrog kev kho cua sov uas tuaj yeem ua tau. Kev xaiv kom raug txwv tsis pub muaj kev puas tsuaj loj-cov ntaub ntawv tshawb fawb yog lub hauv paus ntawm kev txhawb nqa kev nyab xeeb.

Post lub sij hawm: Jun-17-2025

Taw qhia rau Lifting Chain ntawm Qib: G80, G100 & G120