Casting li qub yog li qub ua los ntawm casting.Feem ntau, cov kev ntsuas siab ntawm cov cam khwb cia yog qhov qis (xws li PN16, PN25, PN40, tab sis kuj tseem muaj qhov siab siab, uas tuaj yeem ncav cuag 1500Lb, 2500Lb), thiab feem ntau ntawm lawv cov calibers yog siab dua DN50.Forged li qub yog forged thiab feem ntau yog siv nyob rau hauv high-qib pipelines nrog me me calibers, feem ntau hauv qab DN50.
1. Casting
1. Casting: Nws yog cov txheej txheem ntawm smelting hlau rau hauv cov kua uas ua tau raws li tej yam yuav tsum tau thiab pouring rau hauv pwm.Tom qab txias, solidification, thiab tu, ib tug casting (ib feem los yog dawb paug) nrog ib tug predetermined zoo, loj thiab kev ua tau zoo yog tau.Qhov yooj yim technology ntawm niaj hnub machinery manufacturing kev lag luam.
2. Cov ntaub cam khwb cia uas tsim los kuj yog tus nqi qis, thiab tuaj yeem qhia nws qhov kev lag luam zoo rau cov khoom nrog cov duab nyuaj, tshwj xeeb tshaj yog nrog cov kab noj hniav nyuaj;Nyob rau tib lub sijhawm, nws muaj kev hloov pauv dav dav thiab zoo dua cov khoom siv kho tshuab.
3. Cov khoom siv (xws li hlau, ntoo, roj, cov khoom siv ua qauv, thiab lwm yam) thiab cov khoom siv (xws li metallurgical furnaces, sand mixers, molding machines, core make machines, shakeout machines, shot blasting machines, cast iron plates, etc.) yuav tsum tau rau casting ntau lawm) yog ntau, thiab yuav ua rau cov plua plav, cov pa phem thiab suab nrov thiab paug ib puag ncig.
4. Casting yog ib hom hlau thermal ua tshuab uas noob neej tau paub ua ntej, muaj keeb kwm txog 6000 xyoo.
Nyob rau hauv 3200 BC, tooj liab qav castings tshwm nyob rau hauv Mesopotamia.Nyob nruab nrab ntawm lub xyoo pua 13th BC thiab 10th caug xyoo BC, Tuam Tshoj tau nkag mus rau lub hnub qub ntawm cov bronze castings.
Cov khoom siv tes ua tau mus txog qib siab, xws li 875 kg Simuwu Fangding Ding los ntawm Shang Dynasty, Zenghou Yizun phaj los ntawm Warring States Sijhawm, thiab daim iav translucent los ntawm Western Han Dynasty yog tag nrho cov neeg sawv cev ntawm ancient casting.
khoom.Thaum ntxov casting tau cuam tshuam los ntawm cov lauj kaub tais diav, thiab feem ntau ntawm cov castings yog cov cuab yeej lossis cov khoom siv rau kev ua liaj ua teb, kev ntseeg, thiab lub neej.
Cov xim kos duab muaj zog.Nyob rau hauv 513 BC, Tuam Tshoj tau nrum lub ntiaj teb thawj cam khwb cia hlau castings (kwv yees li 270 kilograms hnyav), uas tuaj yeem pom hauv cov ntaub ntawv sau tseg.
Nyob ib ncig ntawm lub xyoo pua 8th, Tebchaws Europe pib tsim cov hlau castings.Tom qab Industrial Revolution nyob rau hauv lub xyoo pua 18th, castings tau nkag mus rau lub sijhawm tshiab ntawm kev pabcuam rau kev lag luam loj.
Nyob rau hauv lub xyoo pua 20th, txoj kev loj hlob sai ntawm casting tau tsim.Nodular cam khwb cia hlau, malleable cam khwb cia hlau, ultra-low carbon stainless hlau, txhuas tooj liab, aluminium silicon, thiab aluminium-magnesium alloys tau tsim ua tiav.
Casting hlau cov ntaub ntawv xws li titanium-raws li thiab npib tsib xee-raws li alloys, thiab invented ib tug tshiab txheej txheem rau inoculating grey cam khwb cia hlau.Tom qab xyoo 1950, kev ua qauv siab ntawm cov xuab zeb ntub tau tshwm sim,
Kev siv tshuaj lom neeg cov xuab zeb ua qauv thiab cov tub ntxhais ua, kev tsim qauv tsis zoo, lwm yam tshwj xeeb casting, tua blasting thiab lwm yam tshiab technologies.
5. Muaj ntau hom casting, uas tau muab faib ua: ①Ordinary xuab zeb casting, suav nrog 3 hom xuab zeb ntsuab, xuab zeb qhuav thiab tshuaj lom neeg cov xuab zeb.②Tshwj xeeb casting, raws li cov qauv tsim, tuaj yeem muab faib ua tshwj xeeb casting nrog ntuj ntxhia xuab zeb thiab gravel raws li cov qauv qauv tseem ceeb (xws li peev casting, av nplaum, casting rhiav plhaub casting, tsis zoo siab casting, khoom casting, ceramic casting) Etc.) thiab tshwj xeeb casting nrog hlau raws li cov khoom pwm tseem ceeb (xws li hlau pwm casting, siab casting, nruam casting, tsis tshua muaj siab casting, centrifugal casting, thiab lwm yam).
6. Cov txheej txheem casting feem ntau suav nrog: ① Kev npaj cov pwm (cov thawv uas ua kua hlau ua cov khoom siv hlau).Cov pwm tuaj yeem muab faib ua cov xuab zeb, hlau, ceramic, av nplaum, graphite, thiab lwm yam, raws li lub sijhawm siv.Rau cov khoom pov tseg, ib nrab thiab mus tas li, qhov zoo ntawm kev npaj pwm yog qhov tseem ceeb uas cuam tshuam rau qhov zoo ntawm castings;② Lub melting thiab pouring ntawm cam khwb cia hlau, cam khwb cia hlau (casting alloys) mas muaj xws li cam khwb cia hlau, cam khwb cia hlau thiab cam khwb cia non-ferrous alloys;③ Casting processing thiab tshuaj xyuas.Casting processing muaj xws li tshem tawm ntawm txawv teb chaws lub cev ntawm lub hauv paus thiab nto ntawm castings, tshem tawm ntawm pouring risers, shoveling ntawm burrs thiab drape seams, raws li zoo raws li kev kho cua sov, shaping, anti-xeb kho thiab ntxhib machining.Import lub twj tso kua mis valve

Nortech yog ib qho ntawm cov ua lag luam valve manufacturers hauv Suav teb nrog cov ntawv pov thawj zoo ISO9001.

Cov khoom tseem ceeb:Npauj Npaim Valve,Pob Valve,Rooj vag Valve,Kuaj Valve,Globe Vav,Y-Strainers,Hluav taws xob Acurator,Pneumatic Acurators.