Cov ntsiab lus: Cov lus qhia no suav nrog QT400-18 ferritic ductile hlau, nws cov GB / T 1348 specs, thoob ntiaj teb sib npaug, txhua yam muaj nuj nqis, qhov zoo, kev txwv, kev siv thiab CNC casting sau ntawv.
QT400-18 yog qib ferritic ductile hlau txhais raws li GB / T 1348.
Nws nta siab ductility, zoo tsis kub-kub toughness thiab machinability, dav siv rau tej yam-resistant cam khwb cia Cheebtsam.
QT400-18 yog dab tsi?
QT400-18 yog spheroidal graphite cam khwb cia hlau qib tau teev tseg los ntawm Suav tus qauv GB / T 1348.
Lub npe hu ua raws li cov qauv kev cai rau Suav cov qib hlau hlau: "QT" xaiv spheroidal graphite cam khwb cia hlau; 400 hais txog qhov tsawg kawg nkaus tensile zog ntawm 400 MPa; thiab 18 sawv cev rau qhov tsawg kawg nkaus elongation tus nqi ntawm 18%.
Nws microstructure yog dominated los ntawm ferrite, uas muab cov khoom nws kos npe ductile thiab tawv kev ua tau zoo.
Rau kev qhia tag nrho rau cov khoom siv hlau hlau, cov txheej txheem tsim khoom thiab kev faib tawm dav dav, koj tuaj yeem tshuaj xyuas peb ua tiav cov ntaub ntawv hlau hlau.
Cov kab lus no yuav tsom tshwj xeeb rau QT400-18 thiab tsis txhob rov hais dua cov ntsiab lus ntawm cov hlau hlau tom qab.
QT400-18 Standard & Sib npaug International Qib
GB/T 1348 Specification ntawm QT400-18
QT400-18 yog tswj los ntawm GB / T 1348, lub teb chaws tus qauv rau spheroidal graphite cam khwb cia hlau hauv Suav teb.
Kev lees paub rau qib no feem ntau yog ua raws li kev ua haujlwm ntawm kev siv tshuab es tsis yog cov tshuaj lom neeg ruaj khov.
Ib qho kev hloov pauv hloov, QT400-18L, kuj tau txhais nyob rau hauv tus qauv no kom tau raws li qhov yuav tsum tau ua kom muaj kev kub ntxhov.
Cov ntaub ntawv sib npaug thoob ntiaj teb (ASTM / EN / ISO)
Cov kws ua haujlwm ua haujlwm ntawm kev kos duab hla ciam teb feem ntau xav tau daim ntawv qhia QT400-18 kom paub cov qib thoob ntiaj teb.
Cov kev sib npaug uas tau lees paub tshaj plaws tau teev tseg hauv qab no rau kev siv nkaus xwb.
Kev lees txais cov khoom siv zaum kawg yuav tsum ua raws li qhov project txoj cai tswj hwm qhov tshwj xeeb.
- ASTM A536: 60-40-18 Cov
- TS EN 1563: EN-GJS-400-18, tseem hu ua GGG40 hauv cov laus DIN nomenclature
QT400-18L yog qhov ntsuas kub qis uas tau teev tseg hauv GB / T 1348.
Nws tsis tuaj yeem hloov pauv ncaj qha los ntawm tus qauv QT400-18 lossis qhov sib npaug thoob ntiaj teb yam tsis muaj kev tshuaj xyuas tsim qauv.
QT400-18 Mechanical & Physical Properties
Mechanical Performance Table
Mechanical qhov tseem ceeb rau QT400-18 yog kuaj ntawm cov qauv cam khwb cia.
Qhov kev ua tau zoo tiag tiag tuaj yeem hloov pauv raws li cov phab ntsa casting thickness, tus nqi cua txias thiab kev tswj cov txheej txheem foundry.
| Khoom | Tus nqi tsawg kawg nkaus | Hom kab mob |
| Tensile zog | 400 MPa | 400-480 MPa |
| 0.2% Pov thawj Stress | 250 MPa | 250-300 MPa |
| Elongation | 18% | 18-24% |
| Brinell Hardness | — | 120–180 HWB |
| Room-Tsub Impact Toughness | 14 J | 14–22 J |
Kwv yees Chemical Composition Range
Cov tshuaj muaj pes tsawg leeg tsuas yog ua haujlwm hauv cov txheej txheem tswj kev siv hluav taws xob. Kev lees txais QT400-18 yog raws li cov khoom siv kho tshuab, tsis txwv tshuaj lom neeg.
Cov chaw tsim khoom sib txawv kho cov pa roj carbon, silicon thiab cov kab hlau rhuav tshem kom ruaj khov spheroidization thiab ferrite matrix.
Tej yam muaj pes tsawg leeg yog qhia hauv qab no:
- Cov pa roj carbon: 3.5% ~ 3.9%
- Silicon roj: 2.2% ~ 2.8%
- Manganese: ≤0.30%
- Phosphorus: ≤0.07%
- Sulfur: ≤0.03%
Qhov tseem ceeb & Kev txwv ntawm QT400-18
Cov txiaj ntsig tseem ceeb
QT400-18 sawv tawm ntawm ferritic ductile hlau qib rau nws qhov sib npaug toughness thiab workability.
- High elongation thiab ductility, muaj zog muaj peev xwm nqus dynamic cuam tshuam loads
- Kev ntseeg tau qis-kub toughness piv nrog pearlitic ductile hlau qib
- Zoo heev machinability rau CNC tig, milling thiab tho txawv
- Zoo vibration damping muaj peev xwm rau rotating thiab hydraulic khoom
- Nruab nrab castability rau complex, nyias-rau-nruab nrab phab ntsa castings
Kev txwv & Cov xwm txheej tsis tsim nyog
QT400-18 tsis yog universal ductile hlau qib, thiab cov neeg tsim qauv yuav tsum tsis txhob siv nws dhau nws lub hnab ntawv ua haujlwm.
- Tsawg deg hardness ua rau nws tsis zoo xaiv rau qhov chaw nyob rau hauv hnyav abrasive hnav
- Tsis pom zoo rau daim ntawv thov uas xav tau kev tiv thaiv kev qaug zog siab
- Phab ntsa thickness muaj zog cuam tshuam rau ferrite tuav; Cov ntu tuab yuav plam lav elongation thiab toughness
- Vuam yog ua tau tab sis yuav tsum nruj preheat thiab tom qab cua sov txheej txheem kom tsis txhob tawg
QT400-18 Cov ntawv thov kev lag luam
QT400-18 raug xaiv thaum muaj kev cuam tshuam thiab ductility yog qhov tseem ceeb tshaj lub zog siab lossis hardness.
Nws yog feem ntau teev rau cov khoom uas muaj kev poob siab load, vibration los yog overload.Kawm ntxiv txog peb ductile hlau mechanical qhov chaw.
Cov xwm txheej siv xws li:
QT400-18 Casting & CNC Machining Notes
Foundry Considerations rau QT400-18
Raws li ferrite matrix yog lub hom phiaj zoo rau QT400-18 ntau lawm.
Cov pab pawg Foundry tsom mus rau ob kauj ruam tseem ceeb ntawm kev tswj hwm: kev kho nodularization thiab inoculation.
Kev tsim nyog inoculation tiv thaiv chill tsim thiab stabilizes graphite spheroid duab.
Shrinkage porosity thiab microshrinkage yog qhov tsis xws luag rau ferritic ductile hlau.
Gating thiab riser systems yuav tsum tau tsim los txhawb kev taw qhia kev ruaj ntseg, tshwj xeeb tshaj yog rau cov cheeb tsam hnyav.
Kev ua kom txias tsis zoo yuav qhia pearlite thiab txo elongation hauv qab 18% xav tau.
CNC Machining Tips
Cov mos ferritic microstructure ntawm QT400-18 muab kev ua haujlwm ruaj khov.
Nws tsim cov chips txuas ntxiv es tsis txhob siv cov hmoov av abrasive, uas txo cov cuab yeej hnav piv nrog cov tawv tawv pearlitic ductile hlau.
- Uncoated carbide inserts ua haujlwm zoo rau kev tig thiab milling
- Txiav ceev tuaj yeem teeb tsa siab dua li grey cam khwb cia hlau
- Kev kho deg xws li pleev xim, hmoov txheej lossis roj impregnation yog dav siv rau kev tiv thaiv corrosion tom qab machining
Yog tias koj tab tom nrhiav kev cai QT400-18 ductile hlau castings nrog CNC tiav machining, koj tuaj yeem tshawb nrhiav peb cov khoom siv hlau hlau casting ntau yam.
QT400-18 vs QT450-10 Ductile Hlau
QT400-18 thiab QT450-10 yog ob feem ntau tsis meej pem GB ductile hlau qib.
Cov lus hauv qab no qhia meej txog lawv qhov sib txawv rau kev xaiv cov khoom siv.
| Parameter | QT400-18 | QT450-10 |
| Yam tsawg kawg Tensile Strength | 400 MPa | 450 MPa |
| Tsawg kawg Elongation | 18% | 10% |
| Matrix Qauv | Siab ferritic | Ferritic-pearlitic |
| Tsawg-temperature Toughness | Zoo dua | qis |
| Hardness Range | 120–180 HWB | 160–210 HWB |
| Zoo tshaj rau | Kev cuam tshuam, kev pabcuam kub qis | Lub zog nruab nrab, cov khoom siv dav dav |
Xaiv QT400-18 thaum elongation thiab cuam tshuam kev nqus yog qhov tseem ceeb.
QT450-10 yog qhov zoo dua rau cov ntawv thov uas xav tau lub zog tensile siab dua qhov twg qhov kev xav tau ductility tsis nruj.
FAQ
Puas yog QT400-18 zoo ib yam li 60-40-18 ductile hlau?
QT400-18 yog dav kho raws li Suav sib npaug ntawm ASTM A536 60-40-18, tab sis lawv tau txhais raws li cov qauv sib txawv.
Daim ntawv qhia no tsuas yog siv rau kev tshuaj xyuas cov khoom ua ntej.
Txhua qhov kev lees paub raug cai yuav tsum ua raws li qhov project cov txheej txheem cov ntaub ntawv teev tseg.
QT400-18 puas tuaj yeem welded?
Vuam yog technically ua tau, tab sis nws yuav tsum tau ceev faj tswj cov txheej txheem.
Preheating thiab tswj cov cua txias yog qhov yuav tsum tau ua kom tsis txhob muaj qhov tawg thiab tawg.
Weld pob qij txha feem ntau yuav poob ib feem ntawm cov khoom siv hauv paus ductility.
Qhov txawv ntawm QT400-18 thiab QT400-18L yog dab tsi?
QT400-18L yog qhov ntsuas kub qis.
Nws tuav kev ruaj ntseg Charpy cuam tshuam qhov tseem ceeb ntawm qhov ntsuas kub qis rau cov cuab yeej txias-ib puag ncig.
Txuj QT400-18 tsuas yog npog chav-kub qhov yuav tsum tau muaj.
Puas yog QT400-18 haum rau qhov hnav-tiv taus?
Feem ntau tsis muaj. Nws cov mos ferritic matrix muaj kev cuam tshuam tsis zoo.
Rau cov ntaub ntawv hnav, cov hlau hnyav dua, cov hlau tsis muaj hlau lossis hlau cam khwb cia hlau yuav tsum raug txiav txim siab.
