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Tsev > Xov xwmNtsiab lus

Valve Castings Lub Caus Ntawm Cov Kev Liam Hauv Cov Txheej Txheem Ntau Lawm

Ningbo Qianhao Hlau Khoom Co., Ltd | Updated: Oct 10, 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, ultrasound muaj lub siab zoo, tab sis kuj vim hais tias nws yog kheej kheej 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. Nyob rau hauv cov ntaub ntawv ntawm

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. Nyob rau hauv cov ntaub ntawv ntawm

4. sib xyaw nrog

(Xws li oxides, sulfides, thiab lwm yam.) Nyob rau hauv cov txheej txheem smelting - non-metallic inclusions los yog additives ntawm tej yam khoom ntawm cov hlau tivthaiv tsis tag melted thiab nyob twj ywm rau daim hlau inclusions xws li high density, high melting point Cheebtsam - tungsten, 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. Nyob rau hauv cov ntaub ntawv ntawm

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 ntau tshaj qhov lub zog ntawm qhov 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 khoom sib tsom xam cov kab nrib qaum hauv cov khoom siv qis qis dua yog tias 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 ua tus casting, uas yog vim kev sib ntxub, tumbling, pouring, los yog ob qho ntawm cov lus qhia txawv (los yog ntau hom)) 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.

8.Saib

Qhov no yog thaum cov hlau los ntawm cov nplaum los ntawm cov hmoov pob zeb ua rau cov pob zeb qhuav, vim tias qhov kev cuam tshuam, kev ncua thiab lwm yam, thawj lub hwj ntawm cov hluav taws xob hauv cov huab cua ua rau huab cua oxide sai sai, 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. Nyob rau hauv cov ntaub ntawv ntawm

9. Anisotropy

Thaum lub casting los yog ingot yog txias thiab solidified, qhov txias txias ntawm qhov chaw mus rau qhov chaw txawv, ua rau txawv cov ntaub ntawv crystallographic, pom anisotropy ntawm mechanical zog, thiab ua rau anisotropy cov acoustic zog, Cov nto muaj suab sib txawv tshaj tawm thiab 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.