Hlau, alumina kev lag luam valve kev ua tau zoo rooj plaub valve cam khwb cia hlau qhov zoo li yuav tsum tau ua

Hlau, alumina kev lag luam valve kev ua tau zoo rooj plaub valve cam khwb cia hlau qhov zoo li yuav tsum tau ua

Pob valve, ntiaj teb valve, npauj npaim valve
Hlau castings ntawm li qub yuav tsum raug tshuaj xyuas ib pliag tom qab hnav thiab txiav, thiab yuav tsum tau soj ntsuam rau ntau yam tsis xws luag ntawm qhov chaw raws li cov duab teev hauv cov qauv no (saib Tshooj 4). Cov txheej txheem no tau sau 12 hom hnub nyoog tsis xws luag (saib 4.1–4.12, txhua yam tsis xws luag suav nrog 5 tus neeg sawv cev los ntawm A, B, C, D thiab E. Txhua yam tsis xws luag [hom a} teeb c}} cov ntsiab lus hauv cov duab ntsuas tau piav qhia tsuas yog rau qhov tsis xws luag Cov hom thiab cov yam ntxwv ntawm ntau yam defects yog piav raws li hauv qab no:
1 Ntau
Cov qauv no qhia txog cov yam ntxwv thiab cov yam ntxwv ntawm qhov tsis xws luag hauv cov li qub, flanges, yeeb nkab fittings thiab lwm yam compression steel castings.
Cov txheej txheem no siv rau kev kuaj pom thiab kev lees paub ntawm qhov zoo ntawm li qub, flanges, yeeb nkab fittings thiab lwm yam compression steel castings.
2. Kev ntsuam xyuas qhov zoo
Cov hlau castings yuav tsum tau soj ntsuam ib pliag tom qab kho thiab txiav, thiab qhov tsis xws luag ntawm cov castings yuav tsum raug soj ntsuam raws li cov duab teev hauv cov qauv no (saib Tshooj 4).
3. Kev ntsuas lub npe ntawm daim duab
3.1 Tus qauv no sau 12 hom hnub nyoog tsis xws luag (saib 4.1–4.12), txhua yam tsis xws luag suav nrog 5 tus neeg sawv cev los ntawm A, B, C, D thiab E, ob qhov xwm txheej qhia los ntawm A thiab B tau txais (tsim nyog), thiab peb kis ntawm C, D thiab E yog qhov tsis txaus ntseeg (tsis tsim nyog) qhov tsis raug. Nyob rau hauv kev txiav txim siab ntawm cov teeb meem tshwm sim los ntawm waxes siv tib tus qauv los txiav txim qhov loj ntawm overwidth ntawm casting nto, 60 daim duab muab rau hauv tus qauv no yog cov piv txwv ntawm qhov loj me me ntawm ib qho 4 X 100 mm X 125 mm cheeb tsam ntawm qhov teev casting. nto.
3. 2 Txhua yam tsis xws luag hauv cov duab ntsuas [Hom a} teeb c}} cov ntsiab lus tau piav qhia tsuas yog siv rau qhov tsis xws luag. Cov hom thiab cov yam ntxwv ntawm txhua qhov chaw defect yog piav raws li hauv qab no:
a} tawg: linear tawg rau saum npoo ntawm cov hlau castings vim qhov kev ua ntawm kev ntxhov siab sab hauv thiab sab nraud. Feem ntau pom cov kab nrib pleb tsis tsim nyog.
b) Shrinkage kab noj hniav: Vim yog hlau}}L-1}}, nyob rau hauv lub pouring thiab riser txiav ntawm steel castings, cov duab yog tsis tshua muaj tsis xwm yeem, phab ntsa yog ntxhib thiab muaj dendri zoo li siv lead ua qhov.
C) Xuab zeb (slag) qhov: qhov nrog xuab zeb (slag) tsim nyob rau saum npoo ntawm cov hlau nrum vim yog kev koom tes ntawm cov xuab zeb rau hauv cov hlau molten.
d) Pores: vim yog cov roj sib xyaw hauv cov hlau molten, thiab tsim qhov sib txawv ntawm qhov sib txawv ntawm qhov skim l ", lub qhov phab ntsa yog du thiab pear zoo li, puag ncig, oval lossis rab koob zoo li qhov.
e (Ridged projection): Ib tug ntsia hlau loj (ridge) zoo li tus hlau projection nyob rau saum npoo ntawm ib tug hlau cam khwb cia. Cov duab ntawm qhov tsis sib xws, reticular los yog leeg-zoo li faib ntawm burrs hu ua veins.
f) Rat Tail: ntiav (tsawg dua 5 ~) indentations nrog cov kaum sab xis yog tsim rau saum npoo ntawm cov skimmer vim qhov tsis xws luag lossis deformation ntawm cov xuab zeb nto.
g) Kev sib cais txias thiab crease: nkag los yog impenetrable crevices tsim nyob rau saum npoo ntawm steel castings nyob rau hauv cov duab ntawm rounded fab vim tsis tiav kev koom ua ke ntawm cov seev cev hom. Nyob rau hauv lub epidermis feem ntau nrog ib tug sib sib zog nqus network ntawm grooves hu ua creases.
h) Txiav caws pliav: steel cam khwb cia nyob rau hauv cov txheej txheem ntawm tu, txiav thiab pouring, riser, vim yog tsis tsim nyog hnav khaub ncaws sab laug.
i) Scar: hlau protrusions tsim nyob rau saum npoo ntawm steel castings yog caws pliav. Qhov saum npoo yog ntxhib, ntug yog ntse, muaj lub suab me me cia siab hlau thiab lub cev tes tuav lub cev yog txuas nrog, thiab muaj cov xuab zeb txheej ntawm qhov caws pliav thiab cov casting.
j} Brace caws pliav: Sab laug rau saum npoo ntawm cov hlau nrum los ntawm qhov tsis ua hauj lwm ntawm cov tub ntxhais brace lossis puab chiller kom yaj tag.
k) Vuam caws pliav: kev kho vuam ntawm cov hlau castings raug tso tseg vim kev kho tsis zoo tom qab vuam.
l) Rough nto: nto ntawm steel cam khwb cia yog tsis du thiab tsis sib xws.
4 Rating Duab
4. 1 Hom a): Kev tawg