Q450 NQR 1thiab Q500NQR1 yog siab- lub zog steels dav siv nyob rau hauv hnyav fabrication, welded qauv, thiab load- bearing Cheebtsam.
Q450 NQR 1
Txawm hais tias ob qib yog tib yam siab -lub zog qis-alloy (HSLA) tsev neeg, lawv ua qhov tseem ceeb ntawm kev tsim qauv: Q450NQR1 tseem ceeb tshaj plaws ductility, toughness, thiab weldability, whereas Q500NQR1 tsom rau siab dua yield zog rau txo seem thickness thiab hnyav.
Gnee muab siab -zoo Q450NQR1 steel daim hlau thiab strips, muab kev ua tau zoo, tus nqi -kev ua tau zoo, thiab kev tsim tau yooj yim rau cov kws tsim qauv, cov neeg tsim khoom, thiab pab pawg muag khoom thoob ntiaj teb.
Standards specification ntawmQ450 NQR 1thiab Q500NQR1
| Yam ntxwv | Q450 NQR 1 | Q500NQR1 |
|---|---|---|
| National Standard | GB/T siab -lub zog steel | GB/T siab -lub zog steel |
| Yield zog | ~ 450 MPa | ~ 500 MPa |
| Khoom siv | HSLA carbon hlau | HSLA carbon hlau |
| Suffix Lub ntsiab lus | NQR1 qhia txog qhov normalized/quench-rolled and quality class | NQR1 similar meaning; nruj dua ua kom muaj zog dua |
Ob qib tsis yog stainless lossis cov cuab yeej hlau. Qhov "Q" txhais tau tias cov txiaj ntsig -raws li naming (~MPa), thiab microalloying nrog Nb, V, los yog Ti tso cai rau lub zog ntau dua yam tsis muaj kev cuam tshuam qhov hnyav.
Tshuaj muaj pes tsawg leeg ntawmQ450 NQR 1thiab Q500NQR1
| Element | Q450 NQR 1 | Q500NQR1 | Lub luag haujlwm |
|---|---|---|---|
| C | Tsawg-mob siab | Tsawg-nruab nrab, me ntsis siab dua | Balances lub zog & weldability |
| Mn | Nruab nrab | Nruab nrab-siab dua | Nce hardenability thiab lub zog |
| Si | Tswj tau | Tswj tau | Deoxidizer, pab toughness |
| P & S | Tsawg | Tsawg | Cov impurities los txo cov brittleness |
| Cr | Me me | Me me - nruab nrab | Lub zog thiab hardenability |
| Nb, V, Ti | Tshawb xyuas microalloying | Microalloying kom ncav cuag cov txiaj ntsig siab dua | Grain refinement, nag lossis daus reinforcing |
Q450NQR1 siv tswj microalloying thiab qis carbon sib npaug, ua rau nws ntau weldable thiab ductile, thaum Q500NQR1 xav tau kev kho cua sov nruj dua kom ncav cuag 500 MPa tawm los.
Kev kho cua sov ntawmQ450 NQR 1thiab Q500NQR1
Q450NQR1: Fine-grained ferrite-pearlite los yog nplua bainite, feem ntau tau los ntawm normalization los yog thermo-mechanical controlled processing (TMCP). Optimized rau toughness thiab ductility.
Q500NQR1: Kev faib ua feem ntau ntawm bainite lossis tempered martensite kom ua tiav cov txiaj ntsig siab dua. Microalloy precipitates (NbC, VC, TiN) ntxiv dag zog rau cov hlau tab sis yuav tsum tau ua tib zoo kho cua sov.
Kev kho cua sov: Normalizing txhim kho toughness; quenching & tempering (Q&T) yuav siv tau rau Q500NQR1. Q450NQR1 feem ntau tsis xav tau Q&T nyuaj, simplifying fabrication.
Mechanical Properties ntawmQ450 NQR 1thiab Q500NQR1
| Khoom | Q450 NQR 1 | Q500NQR1 |
|---|---|---|
| Yield zog | ~ 450 MPa | ~ 500 MPa |
| Tensile zog | 540-690 MPa | Higher, often >600 MPa |
| Elongation | Ntau dua lossis sib npaug li 18% | Tsawg dua ntawm cov thickness zoo sib xws |
| Impact Toughness | Zoo, txhim khu kev qha | Yuav tsum muaj kev tswj hwm nruj dua |
| Hardness | Nruab nrab | Siab dua vim muaj zog |
Q450NQR1 muab lub zog sib npaug-tawv ua ke, yooj yim rau kev tsim thiab vuam, thaum Q500NQR1 ua lag luam ductility kom muaj zog dua.
Weldability ntawmQ450 NQR 1thiab Q500NQR1
Q450NQR1: Tsawg carbon sib npaug → yooj yim rau vuam, txo qis preheat, txo kev pheej hmoo ntawm tshav kub- cuam tshuam cheeb tsam (HAZ) tawg.
Q500NQR1: Ntau dua hardenability → tej zaum yuav xav tau kev tswj nruj dua, preheat, interpass txwv, thiab post-weld heat treatment (PWHT).
Fabrication kom zoo dua: Rau feem ntau cov haujlwm ua haujlwm, Q450NQR1 tso cai rau kev ruaj ntseg vuam thiab tsim, txuag sijhawm thiab nqi.
Daim ntawv thov ntawmQ450 NQR 1thiab Q500NQR1
| Q450 NQR 1 | Q500NQR1 |
|---|---|
| Cov choj, cov tsev, nruab nrab - mus rau - hnyav welded qauv | Crane booms, hnyav machinery thav duab, offshore qauv |
| General structural phaj thiab seem | High -cov khoom siv thauj khoom muaj zog thiab cov khoom tshwj xeeb |
| Cov yam ntxwv ntawm cov khoom xav tau ductility & toughness | Nyhav- cov ntawv thov tseem ceeb uas txo cov thickness yog qhov tseem ceeb |
Siv Q450NQR1 rau tej yaam num ua ntej qhov yooj yim ntawm fabrication, ductility, thiab tus nqi -effectiveness. Xaiv Q500NQR1 tsuas yog thaum cov txiaj ntsig siab dua yog qhov tseem ceeb thiab kev tswj hwm kev tsim khoom nyob hauv qhov chaw.
Tus nqi ntawmQ450 NQR 1thiab Q500NQR1
Q450NQR1: Feem ntau tus nqi qis dua ib kg, muaj ntau dua, kev ua haujlwm yooj yim dua.
Q500NQR1: Tus nqi siab dua vim yog microalloying thiab kev kho cua sov.
Qhia kom meej thickness, normalized lossis TMCP tus mob, thiab cuam tshuam qhov ntsuas kub kom ntseeg tau tias xa khoom raws sijhawm thiab tsis txhob them tus nqi hwm.
| Kev ntsuas | Q450 NQR 1 | Q500NQR1 |
|---|---|---|
| Weldability | Zoo dua / ntau zam txim | Yuav tsum muaj kev tswj hwm nruj dua |
| Lub zog vs Toughness | Sib npaug, siab dua ductility | Lub zog siab dua, tougher los tswj ductility |
| Nqi | qis | Siab dua |
Q450NQR1 yog qhov kev xaiv zoo tshaj plaws rau feem ntau cov qauv welded, txuas hniav, lub hauv paus ua haujlwm, thiab nruab nrab- rau- hnyav fabrication tej yaam num uas ductility, weldability, thiab nqi-effectiveness tseem ceeb heev.
Gnee muab ntawv pov thawj Q450NQR1 daim hlau thiab strips nrog thoob ntiaj teb kev xa khoom, kev txhawb nqa, thiab daim ntawv pov thawj zeb kom ntseeg tau tias cov txiaj ntsig tau zoo. Tiv tauj peb hnub no kom thov ib qho kev hais los yog kev sib tham thiab kev ruaj ntseg Q450NQR1 steel rau koj qhov project tom ntej.
Hu rau tam sim no kom tau txais Q450NQR1 Corten Steel Plate Quote
Q450NQR1 siab zog huab cua steel phaj yog dab tsi?
A:Q450NQR1 yog lub zog muaj zog huab cua uas tsim los ntawm Cu-Cr-Ni alloy system, optimized nrog C, Si, Mn, thiab kab kawm zoo li Nb thiab Ti. Nws ua ke lub zog siab, zoo heev toughness, thiab superior atmospheric corrosion kuj, ua rau nws zoo tagnrho rau cov choj, kev tsim kho, hnyav machinery, thiab sab nraum zoov steel qauv.
Dab tsi yog cov khoom siv kho tshuab ntawm Q450NQR1?
A:Q450NQR1 muaj lub zog tawm los Ntau dua lossis sib npaug ntawm 450 MPa, lub zog tensile Ntau dua lossis sib npaug ntawm 600 MPa, elongation tom qab tawg Ntau dua lossis sib npaug li 21%, thiab cuam tshuam lub zog ntawm -40℃Ntau dua lossis sib npaug rau 60 J. Cov khoom no ua kom cov hlau ua tau zoo, muaj kev nyab xeeb thiab hnyav.
Q450NQR1 piv rau Q345GNHL lossis Q235B steel li cas?
A:Q450NQR1 muaj qhov zoo corrosion kuj zoo dua li Q345GNHL thiab Q235B, tsim cov txheej tiv thaiv oxide uas txo cov txij nkawm. Nws tseem muaj zog dua thiab tawv, ua rau nws tsim nyog rau kev thov sab nraum zoov thiab cov qauv siv.
Dab tsi ua rau Q450NQR1 tiv taus corrosion?
A:Q450NQR1 muaj cov khoom zoo tshaj plaws xws li Cu, Cr, thiab Ni. Nws cov corrosion kuj Performance index I> 6.0 thiab J> 1.0, thiab cov kev kuaj sim xws li ntsev tsuag thiab cyclic immersion paub meej tias superior atmospheric corrosion kev ua tau zoo.
Puas yog Q450NQR1 weldable?
A:Yog lawm, Q450NQR1 muaj weldability zoo heev. Nws tuaj yeem welded siv cov txheej txheem vuam yam tsis muaj preheating feem ntau, ua tsaug rau nws cov tshuaj muaj pes tsawg leeg thiab ua kom zoo dua microstructure. Qhov no ua rau nws zoo tagnrho rau cov txheej txheem complex.
