High Quality Fire Wet Alarm Valve Sprinkler System

High Quality Fire Wet Alarm Valve Sprinkler System

Dab tsi ntawm cov khoom peb siv rau High Quality Fire Wet Alarm Valve Sprinkler System, nws yog QT450-10 ductile hlau lub ntsiab lub cev yog hais txog cov khoom siv tsim los ntawmQT450-10 ferritic ductile hlau(raws li GB/T 1348-2009 qauv). Lub npe "QT450-10" qhia txog nws cov ntsiab lus tseem ceeb ntawm kev siv tshuab: qhov tsawg kawg nkaus tensile lub zog ntawm 450MPa thiab qhov tsawg kawg nkaus elongation ntawm 10% - kos nws raws li cov khoom sib npaug rau lub zog, toughness, thiab casting adaptability.

1. Cov yam ntxwv ntawm cov khoom tseem ceeb

Mechanical Benchmarks

QT450-10 tawm tsam qhov tsis tshua muaj qhov sib npaug ntawm rigidity thiab ductility:

Tensile zog: Ntau dua los yog sib npaug rau 450MPa (≈30% siab dua li cov xim grey cam khwb cia hlau)

Yield zog: Ntau dua los yog sib npaug rau 310MPa (muaj peev xwm tiv taus kev hloov pauv ntawm lub zog siab)

Elongation: Ntau dua los yog sib npaug li 10% (ua kom cov yas deformation nyob rau hauv kev cuam tshuam, tsis txhob nkig tawg hauv siab - cov xwm txheej kev ntxhov siab)

Tsawg-kev ua haujlwm kub: Kev cuam tshuam ruaj khov ntawm -20℃(tseem ceeb rau cov khoom siv huab cua txias)

Hardness: 160-210HB (nruab nrab rau kev ua haujlwm yooj yim thaum tiv thaiv me me)

Compositional Controls

Nws muaj pes tsawg leeg yog precisely calibrated los xyuas kom meej spheroidization thiab kev ua tau zoo:

Cov ntsiab lus tseem ceebCarbon (3.70–4.00%, lub hauv paus rau graphite tsim), Silicon (2.15–2.93%, txhawb ferrite matrix txoj kev loj hlob)

Spheroidizing tus neeg sawv cevMagnesium (0.027-0.050%, transforms flake graphite mus rau spherical hais)

impurity txwv: Sulfur (Less tshaj los yog sib npaug rau 0.030%) thiab phosphorus (Less tshaj los yog sib npaug rau 0.035%) yog nruj me ntsis txwv kom tsis txhob nkim tebchaw uas txo toughness.

Microstructural Foundation

Cov khoom siv kev ua tau zoo yog los ntawm nws cov tswj microstructure:

Raws li -cast state: Spherical graphite (Ntau dua lossis sib npaug rau 92% spheroidization tus nqi) embedded hauv ferrite matrix (theem loj) + kab pearlite

Normalized xeev (yeem): Insulating ntawm 920-980℃fine-tunes lub ferrite-pearlite piv, boosting cuam tshuam los ntawm ~20% rau siab- thov kev thov.Sphereical graphite txo qhov kev ntxhov siab concentration, ib qho tseem ceeb kom zoo dua flake- graphite grey cam khwb cia hlau.

2. Fabrication & Application Advantages

Fabrication Compatibility

QT450-10 yog qhov zoo rau kev tsim khoom lag luam:

Casting: High molten hlau fluidity txhawb nqa ib qho -daim casting ntawm complex geometry (piv txwv li, lub cev valve nrog cov chav sab hauv), txo cov kauj ruam sib dhos thiab cov ntsiab lus xau.

Tshuab dhos: Nruab nrab hardness ua kom zoo tig / milling; spherical graphite ua raws li cov roj nplaum sab hauv, txiav cov cuab yeej hnav los ntawm ~ 15%.

Kev tiv thaiv corrosion: Pairing nrog epoxy zinc-nplua nuj primer + polyurethane topcoat ua tiav cov tshuaj tsuag ntsev ntau dua lossis sib npaug li 800h, yoog rau qhov chaw nyob sab hauv tsev / sab nraum zoov.

Targeted Application Scenarios

Nws yog ib qho khoom siv rau kev thauj khoom -cov kabmob, siab- cov khoom tiv thaiv:

Cov khoom siv tiv thaiv hluav taws: Ua lub cev tseem ceeb rau ZSFZ lub tswb ntub dej, tiv taus 1.6MPa ua haujlwm siab thiab 4.8MPa tawg siab (raws li GB 5135 cov qauv kev nyab xeeb hluav taws xob).

Municipal pipeline fittings: Siv rau hauv av muab dej valve lub cev, tiv thaiv av corrosion thiab cyclic siab hloov.

General tshuab: Siv nyob rau hauv lub twj tso kua mis thiab hydraulic lub tog raj kheej lub cev, ntsuas lub siab tsis kam thiab kev poob siab.