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Tsev > Xov xwmNtsiab lus

Valve Castings Analysis thiab Kev Txhim Kho Ntawm Feem Xyuam

Ningbo Qianhao Hlau Khoom Co., Ltd | Updated: Sep 18, 2017

1.Stomata

Qhov no yog lub zog ntawm cov hluav taws xob tsis tuaj yeem khiav tawm cov pa roj hauv cov hlau hauv qhov tsim ntawm cov qhov me me, sab hauv phab ntsa yog du, muaj roj, cov ultrasound muaj kev yoog siab, tab sis kuj vim hais tias nws yog cov ntse kheej los yog ellipsoid, , cov ntsiab lus xws li cov teeb meem, cuam tshuam nws txoj kev xav ntawm qhov siab. Lub stomata hauv ingot yog crushed rau hauv thaj tsam defect by forging los yog rolling thiab yog ib qho kev zoo rau kev pom los ntawm ultrasonic kuaj.

2. Shrinkage thiab xoob

Casting or ingot cooling solidification, qhov ntim kom shrink, nyob rau hauv qhov kawg ntawm cov solidification vim cov tsis muaj hlau ua tau daim tawm zoo li qhov tsis xws li. Loj thiab cov kab noj hniav loj yog hu ua shrinkage, thiab me, tawg chaw yog hu ua loosened. Lawv feem ntau nyob rau hauv qhov kawg ntawm qhov chaw ntawm ingot lossis casting center. Sab hauv phab ntsa yog ntxhib thiab surrounded los ntawm ntau impurities thiab nplua pores. Vim tias txoj cai thermal expansion thiab contraction, shrinkage yog inevitable, tab sis nrog cov txheej txheem sib txawv txoj kev muaj ntau hom, qhov loj thiab qhov chaw, thaum nws txuas mus rau casting los yog ingot lub cev ua puas. Yog hais tias tus txha nqaj qe, cov roj hmab yuav ua rau lub qhov ntswg ntxiv (qhov ntswg qhov ntswg, qhov ntswg ntxiv) yog tias nws tsis raug tshem tawm ntawm lub forging.

3. qhev

Lub cuav nyob rau hauv cov txheej txheem smelting los yog cov hluav taws kub rau lub tshuab ua kom cub hluav taws yog exfoliated rau hauv cov xim ua kua thiab raug muab tso rau hauv lub casting los yog lub cev nqaij pob txha thaum lub sij hawm casting rau ib tug slag defect. Lub slag feem ntau tsis tuaj yeem nyob hauv ib lub xeev xwb, feem ntau nyob hauv ib lub xeev ntom ntws los yog dispersed ntawm cov depths sib txawv, uas tsa qhov tsis xws luag lub cev, tab sis yuav tsum muaj ib cov degree.

4. sib xyaw nrog

Club Muaj Club Clubxwm tiag tiag tiag tiag nram ceeb ceeb ceeb tiag tiag ceeb tiag tiag nram ceeb ceeb ceeb tiag tiag ceeb tiagef ceeb ceeb ceeb tiag tiag ceeb ceeb ceeb ceeb ceeb ceeb Molybdenum, lwm yam zoo li

5. kev sib cais

Qhov sib cais nyob hauv casting los yog ingot tsuas yog hais txog kev sib cais ntawm cov cheeb tsam tsim thaum lub sij hawm melting txheej txheem los yog lub melting ntawm cov hlau vim lub sib npaug tsis sib npaug ntawm lub cheebtsam. Cov khoom sib txuas ntawm cov cheeb tsam ntawm cov cheeb tsam no nyias txawv nyias ntawm cov neeg ntawm cov hlau loj. Qhov txawv yog dhau ntawm qhov tso cai txheem Qhov Theem pib ua qhov tsis zoo.

6. Casting tawg

Cov kab nrib pleb hauv qhov casting mas vim yog qhov tseeb tias qhov kev nyuab siab ntawm cov hlau txias thiab kev sib zog ua tiav tshaj lub zog qhov kawg ntawm cov khoom. Nws muaj feem xyuam rau cov qauv tsim thiab casting txheej txheem ntawm casting thiab tawg ntawm cov khoom hlau. (Xws li kub brittleness thaum sulfur cov ntsiab lus yog siab, txias brittleness thaum phosphorus cov ntsiab lus yog siab, thiab lwm yam). Nyob rau hauv lub pob kawb kuj yuav tsim tau cov kab nrib nrab sab nrauv hauv cov khoom siv qis tom qab uas tsis yog forging, yuav nyob hauv lub forging ua lub forging ntawm cov kab nrig nrog.

7. kev sib cais txias

Qhov no yog ib qho tshwj xeeb ntawm kev raug nplua rau hauv casting, feem ntau yog hais txog txoj kev tsim casting, uas yog vim kev sib ntxais, tumbling, pouring, los yog ob qho ntawm cov lus qhia txawv (los yog ntau lub strands)) Hlau khiav thiab lwm yam, cov kua hlau ua dej ua los ntawm cov yeeb yaj kiab ua ib nrab ntawm cov yeeb yaj kiab los ua ib qho chaw zoo li lub plhaub tiab hauv qhov chaw.

N

Call yaborannesxwm tiag tiag no tiag tiagxwm los ntawm cov tshuaj hauv cov pob zeb thiab cov tsim tawm ntawm qhov chaw nyob, nws yog nyob rau hauv cov cav hlau tom qab hlau tsis tau raug yuam kom tshem tawm.

9. Anisotropy

Consequ civ civ zoo no zoo tiag tiag no ceeb tiag tiag no ceeb tiag tiag consequence ceeb tiag tiag consequence ceeb tiag tiag consequence ceeb şe tiag Club tiag tiag suab seev suab. Lub xub ntiag ntawm no anisotropy yuav adversely rau qhov loj thiab qhov chaw ntawm tus kho raws thaum ntsuam xyuas ultrasonic tshuaj ntsuam ntawm casting.

txhim kho kev ntsuas

(1) khoom tawg ntawm cov khoom ua kua hluav taws xob ntawm cov pluag tsis muaj peev xwm los txhawb thiab kev ruaj ntseg ntawm cov xuab zeb tov tsis zoo. Cov muaj pes tsawg leeg ntawm cov hlau tau raug txwv los ntawm cov yam ntxwv xws li coke, rauv taws ua kom sov, cua ntim thiab raw khoom. Lub pob zeb txawv txav los ntawm yam tseem ceeb xws li kub, reag thiab acid ntxiv. Xws li cov xuab zeb feem ntau tsis mus los ntawm kev txua thiab txias txaj, thiaj li tias cov xuab zeb kub siab heev, cuam tshuam cov xuab zeb muaj zog, uas ua rau hauv cov av xuab zeb ua kom loj, nce qhov kev pov thawj, ua rau lub ntsws tsis zoo.

(2) cov kab noj hniav hauv cov xuab zeb thiab nchuav txheej txheem ntawm kev cuam tshuam ntawm cov hlau iron ncaj qha mus rau trachoma thiab cov xuab zeb tsis xws luag.

(3) cov hmoov hlau hauv cov khoom siv yaj yuav yeej ib txwm yog cov cag ntoo, ncuav cov hlau tawm hauv cov khoom ua kua thiab cov kua nplaum ua ke nrog cov hlau ua rau cov kab noj hniav ua rau cov qhov chaw tawm.

(4) Hauv cov txheej txheem ntau lawm, cov ntsiab lus nitrogen nyob rau hauv cov hlau ua kom muaj zog tuaj, thiab txo cov qis dua. Thaum nitrogen thiab hydrogen ua ke, nws yooj yim tsim daim pores, uas yog lub hauv paus loj.

(5) lub qab ntim ntawm lub puab pwm tsis zoo, qhov zoo ua ntej qhov kev tsis sib haum thiab deformation, uas ua rau cov xuab zeb hom tsis sib luag, thaum hom ntaiv thiab nqis qhov sib txawv ntawm qhov loj, ua rau muaj qhov loj me, tsis zoo lawm.

(6) 2.2m lub cev ntawm tus taw ntawm cov xuab zeb hauv plhaub hauv qhov txheej txheem uas ua rau lub qhov dej txav, yog taw ntawm qhov laj thawj loj vim tsis sib luag phab ntsa. Nyob rau hauv cov ntaub ntawv ntawm

Raws li qhov ua rau ntawm qhov tsis sib thooj, peb tsuas yog los ntawm cov hauv qab no los mus txhim kho kev ntsuas:

(1) qhov tsim nyog ua rau cov dej ua kom muaj zog dua, kev siv cov graphitization expansion los txhim kho nws tus kheej qhov peev xwm ntawm cov khoom.

(2) Chung lub thawv kom paub meej tias qhov compactness ntawm cov xuab zeb, los txhim kho cov xuab zeb hom lub zog, thiab txhawb casting los ntawm kev puv peev.

(3) ua ntej hom kab noj hniav ua ntej lub xuab zeb tawg ntub, thiab ua tib zoo xyuas cov kab noj hniav.

(4) tom qab nchuav rau lub voj voog ntawm lub vov lub cev tsis muaj lub ncuav, lub rooj vag khob thiab qhov qhib qhov ntswg kom npog nruj, kom tiv thaiv kom txhob xuab zeb xuab zeb.

(5) ua ntej yuav muab cov khoom ua kua tso rau saum npoo ntawm cov hlau ntxuav; txhawm rau txhim kho thawj zaug ntawm cov hmoov txhaws ntawm cov hlau kom tsis txhob muaj cov pa oxide oxidation slag; valve casting raws li deb li sai tau tom qab thawj zaug pouring nyob rau hauv lub qhib, Tom qab siv ntawm ib tug loj tus naj npawb ntawm nyias slag; rau 610mm (24in) F lub cev valve, rau cov khiav ntawm cov pob txha khiav, nrog rau lwm yam tsis muaj thaum nchuav, nyob rau hauv qhov kev ntshuam thiab xa tawm nyob rau hauv lub lim, thiab tej ntiv taw chip lim Lub mesh yog khees me ntsis lawm nyob rau hauv daim ntawv kho kom zoo dua qub cov nyhuv ntawm txoj kev tswj fais fab.

(6) raw cov ntaub ntawv kom deb li deb tau siv cov pa carbon, zoo tib yam gray cast iron los yog hlau luam rov qab rau nqi; txo cov hlau nyob hauv cov ntsiab lus xws li Cr, Mn thiab lwm cov ntsiab lus, kom txo cov ntsiab lus ntawm lawv cov roj; Thiab nyob rau hauv cov hnub los nag los yog cov av ntawm lub caij nyoog loj, tom ntej no tseem ceeb yog siv lub tsau rau cov kab noj hniav, cov xuab zeb sab qhov quav ci dua kom txo cov roj npau av; kev siv cov kub siab ncuav hlab me me, Txhawm rau kom pab txhawb lub qe los ntawm lawv tus kheej cov kua thiab txo cov cuav cim.

(7) hnav 1067 hli (42in) F lub cev valve, qhov yuav tsum tau rau ib qho kev tov tsuj hauv tib lub tsho rau tib Chung, hom, thiab hauv pem teb yuav tsum tsis txhob muaj tej yam pliag; tsis pub tso rau hauv lwm qhov chaw los txo nws yog txwv tsis pub nqa cov xuab zeb thiab cov pwm puag hauv phaj ua ke los tiv thaiv lub hauv av.

(8) ncuav 2.2n, lub cev lub plhaub, nyob hauv tus taw ntawm cov tub ntxhais ntawm qhov tseem ceeb ntawm cov tub ntxhais muab cov nqi ntawm cov xuab zeb, thiab kom sai li sai tau. Nyob rau hauv cov ntaub ntawv ntawm

Tom qab siv cov kev ntsuas kev txhim kho saum toj no, tag nrho cov khoom siv ntawm 2413.78t valve, tus nqi pov hwm sab hauv ntawm 1.15%, tus nqi pov tseg sab nraud ntawm 1.73%, qhov seem ntawm 2,88%. Sib piv nrog cov khib nyiab txhim kho, cov nqi khoob nyhuv hauv tsev poob qis 2.39 feem pua, cov nqi sab nraud sab nraud tsawg dua 2.85 feem pua, cov nqi seem ntawm 5.24 feem pua tsawg dua, cov nyhuv yog zoo tshaj plaws.