S550Qyog ib hom quenched thiab tempered low - alloy siab - lub zog structural steel uas ua raws li European tus qauv EN 10025 - 6, nrog rau nws cov khoom siv tooj yog 1.8904. Txhua tsab ntawv thiab tus lej hauv nws qib muaj lub ntsiab lus tshwj xeeb: "S" sawv cev rau cov qauv hlau, "550" qhia tias nws cov khoom muaj zog tuaj yeem ncav cuag 550MPa, thiab "Q" txhais tau tias nws tswj kev ua haujlwm zoo ntawm -20 degree.
Tshuaj muaj pes tsawg leeg
Cov ntsiab lus ntawm teeb meem impurities yog nruj me ntsis tswj. Piv txwv li, cov ntsiab lus siab tshaj plaws ntawm phosphorus yog tsawg dua lossis sib npaug li 0.025% thiab sulfur tsawg dua lossis sib npaug li 0.015%. Nws kuj muaj ntau yam alloys xws li manganese ( Tsawg dua los yog sib npaug li 1.70%), chromium ( Tsawg dua los yog sib npaug li 1.50%), thiab molybdenum ( Tsawg dua lossis sib npaug li 0.70%). Cov ntsiab lus no thiab lawv qhov tsim nyog proportioning ua kom cov hlau muaj zog thiab toughness thaum txhim kho nws cov khoom siv kho tshuab tag nrho.
Mechanical Properties
Nws cov khoom siv kho tshuab sib txawv me ntsis nrog tuab. Rau daim hlau nrog lub thickness ntawm 3 - 50 hli, lub zog tawm los yog 550MPa thiab lub zog tensile ntau ntawm 640 - 820MPa. Thaum lub thickness yog 50 - 100 hli, lub zog tawm los poob rau 530MPa, tab sis lub zog tensile tseem zoo li qub. Rau cov phaj siab tshaj 100 hli, lub zog tawm los yog 490MPa thiab lub zog tensile yog 590 - 770MPa. Tsis tas li ntawd, nws qhov elongation tus nqi tsis tsawg dua 16%, thiab qhov cuam tshuam lub zog ntawm -20℃tuaj yeem ncav cuag 30J, thiab ntawm 0℃nws tuaj yeem ncav cuag 40J.
Common Specifications thiab Delivery Status
Nws cov thickness ntau ntawm 8 - 280mm, dav ntawm 1600 - 4020mm, thiab ntev los ntawm 6000 - 17500mm. Nws feem ntau yog xa tom qab quenching thiab tempering. Yog tias cov neeg siv khoom muaj kev xav tau tshwj xeeb, lawv tuaj yeem sib tham nrog cov neeg muag khoom ntxiv kom paub qhov tsis txaus ntseeg, Z- kev taw qhia kev ua haujlwm thiab lwm yam yuav tsum tau ua, uas yuav tsum tau teev tseg hauv daim ntawv cog lus.
Tej kev siv
Ua tsaug rau nws zoo heev - lub zog thiab qis - qhov kub thiab txias cuam tshuam kev ua tau zoo, nws yog dav siv nyob rau hauv kev tsim cov khoom tseem ceeb uas yuav tsum tau qis - kub tsis kam thiab siab zog. Nws yog ib qho khoom siv rau cov chaw nres tsheb hydropower thiab hydraulic turbines. Meanwhile, nws kuj yog siv rau hauv lub hwj chim xa mus yees, roj derricks, chaw nres nkoj machinery, hnyav - lub luag hauj lwm tsheb qauv thiab siab - nce lub tsev load - bearing Cheebtsam.
Txoj kev vuam thiab kev ceev faj dab tsi yog haum rau S550Q?
It is compatible with CO₂ gas shielded welding and arc welding. Pre-weld preparation requires cleaning 100mm of material around the weld to remove oil/rust. For plates >30mm los yog nyob rau hauv ib puag ncig<0°C, preheat to 80–100°C. Use low-hydrogen welding materials, control heat input, and perform post-weld hydrogen elimination to avoid heat-affected zone embrittlement .
S550Q txawv ntawm S550QL li cas, thiab yuav xaiv li cas ntawm lawv?
Qhov sib txawv ntawm qhov tseem ceeb yog qis-kub toughness: S550Q lav kev ua tau zoo ntawm -20℃, thaum S550QL (nrog "L") ua tau zoo dua lossis sib npaug rau 30J cuam tshuam lub zog ntawm -40℃. Xaiv S550Q rau temperate high-load scenarios zoo li lub zog yees thiab chaw nres nkoj machinery; xaiv S550QL rau qhov chaw txias xws li alpine txuas hniav lossis cov khoom siv mining hauv cheeb tsam txias.
Dab tsi yog daim ntawv thov kev lag luam ntawm S550Q, thiab vim li cas nws thiaj siv dav?
Nws yog dav siv nyob rau hauv lub zog xa hluav taws xob yees, roj derricks, hnyav- lub luag haujlwm lub tsheb, thiab siab - nce lub tsev thauj khoom- cov kabmob . Nws 550MPa yield zog yog 1.6x uas zoo tib yam Q345 steel, ua kom 20-30% cov khoom txo nyob rau hauv cov qauv tsim. Ua ke nrog zoo weldability thiab -20℃toughness, nws sib npaug lub zog, hnyav txuag, thiab kev nyab xeeb.
Puas yog S550Q muaj cov qhab nia sib npaug hauv Suav cov qauv, thiab cov kev sib raug zoo li cas?
Yog lawm, nws ua raws li Tuam Tshoj Q550D qib. Ob leeg muaj 550MPa-theem tawm lub zog, quenched-tempered xa, thiab -20℃cuam tshuam toughness yuav tsum tau. Qhov sib txawv tseem ceeb nyob hauv cov qauv kev ua tiav-S550Q ua raws li EN 10025-6, thaum Q550D ua raws li GB / T 16270, tab sis lawv cov khoom siv tshuab tseem ceeb yog hloov pauv tau rau feem ntau cov haujlwm.
S550Q qhov kev ua tau zoo li cas hloov nrog tuab, thiab dab tsi yuav tsum tau sau tseg hauv daim ntawv thov?
Yield strength decreases slightly with thickness: 550MPa (3–50mm), 530MPa (50–100mm), and 490MPa (100–150mm), but tensile strength and toughness remain stable . For thick plates (>100mm), xaiv Z-qhia kev ua tau zoo qib (Z15/Z25) kom tsis txhob muaj txheej tearing nyob rau hauv ntau- txheej vuam, thiab ntxiv dag zog rau ncej-weld soj ntsuam .