Vermicular cam khwb cia hlau ntawm cov khoom siv valve

Vermicular cam khwb cia hlau ntawm cov khoom siv valve

Qhov ntsuas no txhais cov ntsiab lus thiab cov ntsiab lus, qib, cov kev xav tau, cov qauv thiab cov kev sim ntsuas, cov txheej txheem kuaj, cov cai tswj xyuas, kev txheeb xyuas casting, ntim, khaws cia thiab kev thauj mus los. Txoj kev tsim khoom thiab tshuaj lom neeg muaj pes tsawg leeg ntawm vermicular cam khwb cia hlau yuav tsum tau txiav txim los ntawm tus neeg muag khoom kom paub meej tias cov khoom yuav tsum tau muaj qib thiab ua haujlwm raws li qhov ntsuas no. Thaum vermicular cam khwb cia hlau muaj kev siv tshwj xeeb thiab cov kev cai, cov tshuaj muaj pes tsawg leeg thiab kev kho cua sov tuaj yeem pom zoo los ntawm ob tog. Vermicular cam khwb cia hlau yuav tsum tau soj ntsuam kom muaj tsawg kawg yog 80% vermicular graphite ntawm nws ob-dimensional polished dav hlau, thiab qhov seem 20% yuav tsum yog spherical graphite, clumped graphite, thiab flake graphite yuav tsum tsis txhob pub.

ntau

Qhov ntsuas no txhais cov ntsiab lus thiab cov ntsiab lus, qib, cov kev xav tau, cov qauv thiab cov kev sim ntsuas, cov txheej txheem kuaj, cov cai tswj xyuas, kev txheeb xyuas casting, ntim, khaws cia thiab kev thauj mus los.

Qhov ntsuas no yog tsim los siv rau hauv pwm forging ntawm vermicular graphite cam khwb cia hlau nrog xuab zeb pwm los yog nrog thermal conductivity commensurate nrog xuab zeb pwm. Lub coil cam khwb cia hlau tsim los ntawm lwm txoj kev forging tuaj yeem siv tau raws li kev siv.

Cov ntaub ntawv pov thawj Normative

Cov ntaub ntawv hauv qab no yog qhov tseem ceeb rau kev siv daim ntawv no. Rau cov ntawv sau hnub tim, cov ntawv sau hnub tim siv tau rau daim ntawv no. Lub version ntawm cov ntaub ntawv uas tsis tau hais txog (nrog rau tag nrho cov kev hloov kho) yuav tsum tau siv rau daim ntawv no.

GB / T 228 Cov khoom siv hlau - Kev ntsuas tensile ntawm chav tsev kub (GB / T 228-2002, eqv ISO 6892: 1998)

Cov ntaub ntawv hlau - Brinell hardness tests - Ntu 1: Cov txheej txheem xeem (GB/T 231.1-2009, ISO 6506-1: 2005, MOD)

GB / T 5611 Forging cov ntsiab lus

GB / T 5612 cam khwb cia hlau qib sawv cev txoj kev (GB / T 5612-2008, ISO 15931; 2004, MOD)

Qauv forging nto (GB/T 6060.1-1997, eqv ISO 2632-3: 1979)

Dimensional tolerances thiab Machining pub rau Castings (GB/T 6414-1999, eqv ISO 8062: 1994)

GB / T 11351 casting hnyav kam rau ua

GB / T 26656 vermicular cam khwb cia hlau metallography kho

Cov ntsiab lus thiab cov ntsiab lus

Cov nqe lus tsim los ntawm GB / T 5611 thiab cov ntsiab lus thiab cov ntsiab lus hauv qab no yog siv rau daim ntawv no.

Vermicular cam khwb cia hlau

Carbon feem ntau yog nyob rau hauv daim ntawv ntawm vermicular graphite precipitated los ntawm cam khwb cia hlau nyob rau hauv cov hlau matrix.

Creep kev kho mob

Ib txheej txheem uas tus neeg sawv cev nkag tau ntxiv rau cov kua hlau kom precipitate wormlike graphite thaum solidification.

Casting lub ntsiab phab ntsa thickness

Lub ntsiab phab ntsa thickness ntawm casting yog hais txog lub thickness ntawm seem ntawm cov neeg kho tshuab kev ua hauj lwm ntawm casting cov ntaub ntawv los yog lub thickness ntawm lub ntsiab ua hauj lwm ntawm lub casting, uas yog pom zoo los ntawm ob tog.

hom

Cov khoom siv qib yuav tsum tau sawv cev raws li qhov tshwj xeeb ntawm GB / T 5612.

Hauv qhov ntsuas no, vermicular graphite cam khwb cia hlau tau muab faib ua 5 qib raws li kev faib tawm ntawm cov qauv ua tiav los ntawm ib qho cam khwb cia lossis nrog cov cam khwb cia (saib Table 1 thiab Table 2).

Order cov ntaub ntawv

Hom ntawm cov khoom siv casting xav tau los ntawm Demander.

Lub ntsiab phab ntsa thickness ntawm lub casting muaj nuj nqi raws li tau pom zoo los ntawm ob tog.

Lwm cov kev cai tshwj xeeb tau pom zoo los ntawm ob tog.

Kev tsim khoom thiab kev tsim khoom

Txoj kev tsim khoom thiab tshuaj lom neeg muaj pes tsawg leeg ntawm vermicular cam khwb cia hlau yuav tsum tau txiav txim los ntawm tus neeg muag khoom kom paub meej tias cov khoom yuav tsum tau muaj qib thiab ua haujlwm raws li qhov ntsuas no. Thaum vermicular cam khwb cia hlau muaj kev siv tshwj xeeb thiab cov kev cai, cov tshuaj muaj pes tsawg leeg thiab kev kho cua sov tuaj yeem pom zoo los ntawm ob tog.

Kev xav tau

Mechanical zog ntawm ib qho qauv cam khwb cia

Cov cuab yeej cuab tam ntawm ib qho qauv cam khwb cia ntawm vermicular cam khwb cia hlau yuav tsum ua raws li qhov delineation hauv Table 1.

Feem ntau, 0.2% yield zog Rpo tsis yog siv los ua lub hauv paus rau kev txais. Thaum tus neeg thov muaj cov cai tshwj xeeb, nws kuj tuaj yeem txiav txim siab.

Table 1 Mechanical function of single cast sample

Mechanical kev ua haujlwm ntawm cov qauv cam khwb cia

Cov cuab yeej cuab tam ntawm vermicular cam khwb cia hlau kuaj yuav tsum ua raws li qhov delineation hauv Table 2.

0.2% yield zog Rpo feem ntau tsis siv los ua lub hauv paus rau kev txais. Thaum tus neeg thov muaj cov cai tshwj xeeb, nws kuj tuaj yeem txiav txim siab.

Table 2 Mechanical function of the cast sample

Mechanical muaj nuj nqi ntawm casting lub cev qauv

Txoj hauj lwm ntawm vermicular cam khwb cia hlau nrog kev sim blocks ntawm lub casting yuav tsum coj mus rau hauv tus account qhov zoo ntawm cov casting thiab cov qauv ntawm lub pouring system, thiaj li tsis txhob muaj kev phiv los ntawm cov hauj lwm ntawm cov nyob ib sab qhov chaw, thiab lub hauv paus ntsiab lus tsis yog yuav tsum tau. cuam ​​tshuam cov txheej txheem kev ua haujlwm ntawm cov casting, qhov zoo ntawm cov casting thiab qhov ntom ntawm cov ntawv xeem. Qhov kev sim thaiv yuav tsum tau muab coj los ntawm qhov kev sib deev ntawm qhov casting. Txhawm rau txiav txim siab qhov loj ntawm cov qauv, tus neeg yuav khoom yuav tsum tau qhia rau tus neeg muag khoom txog ntu tseem ceeb ntawm qhov casting. Yog tias tus neeg thov tsis muaj kev xav tsis zoo, tus neeg muag khoom tuaj yeem teeb tsa txoj haujlwm txiav ntawm qhov casting thiab txiav txim siab txoj kab uas hla ntawm tus qauv.

Mounting: vermicular cam khwb cia hlau rau Valve cov ntaub ntawv (I)

Nrog cast test block

Cov castings uas qhov kev sim thaiv txuas nrog kuj yog tag nrho cov castings ntawm tib batch uas muaj cov phab ntsa zoo sib xws.

Feem ntau, thaum qhov hnyav ntawm qhov casting yog ntau tshaj 2000kg, thiab cov phab ntsa thickness yog 30mm ~ 200mm, nws yog qhov zoo dua los muab cov kev ntsuam xyuas casting block. Thaum qhov hnyav casting ntau tshaj 2000kg thiab phab ntsa thickness yog 200mm, qhov txuas nrog kev sim ntsuas thaiv yog siv. Qhov luaj li cas thiab txoj hauj lwm ntawm cov cam khwb cia hlau yuav tsum tau pom zoo los ntawm ob tog.

Tshwj tsis yog tias tau teev tseg los ntawm ob tog, cov duab thiab qhov loj ntawm qhov txuas nrog cov cam khwb cia yog qhia hauv daim duab

Txoj hauj lwm ntawm qhov kev ntsuam xyuas ntxiv rau ntawm qhov casting yuav tsum coj mus rau hauv tus account qhov zoo ntawm cov casting thiab cov qauv qauv ntawm lub pouring system, thiaj li tsis txhob muaj kev phiv los ntawm cov hauj lwm ntawm cov nyob ib sab qhov chaw, thiab tsis muaj kev cuam tshuam cov yam ntxwv muaj nuj nqi. ntawm cov casting, qhov zoo ntawm cov casting thiab qhov ntom ntawm qhov kev sim thaiv raws li txoj cai.

Tag nrho cov kev sim thaiv yuav tsum tau muab cim ua kom pom tseeb tias qhov zoo ntawm qhov casting tuaj yeem taug qab txhua qhov txheej txheem.

Thaum castings xav tau kev kho cua sov, cov khoom txuas txuas yuav tsum tau muab cais tawm ntawm cov castings tom qab kev kho cua sov tshwj tsis yog tias ob tog pom zoo. stretch

Kev piav qhia:

Xuab zeb noj muaj peev xwm ntawm kev sim thaiv casting: hom Ⅰ, Ⅱa thiab Ⅱb yog 40 hli me dua; Hom Ⅲ me me 80mm

Lus Cim: Rau nyias-phab ntsa lossis hlau castings, cov qauv yuav raug coj los ntawm u12.5mm kuaj thaiv, thiab kev ua haujlwm txhua yam tuaj yeem pom zoo los ntawm ob tog.

Qhov luaj li cas ntawm I thiab U blocks yog millimeters

Kev piav qhia:

Test thaiv cam khwb cia noj tais: hom I, hom II me me 40mm; Hom Ⅲ Me me 80mm,

Lus Cim: Rau nyias-walled lossis metallic castings, cov qauv yuav raug coj los ntawm u

Lub cev kuaj thaiv

Lub tshuab ua haujlwm ntawm qhov tshwj xeeb ntawm qhov casting yuav tsum tau pom zoo los ntawm ob tog. Cov haujlwm no yuav tsum tau ntsuas los ntawm cov qauv txiav los ntawm ib feem ntawm qhov casting. Cov qauv kab yuav tsum tau pom zoo los ntawm ob tog. Qhov loj ntawm tensile qauv yog qhia nyob rau hauv FIG. 4 thiab Table 6

Qhov kev sim thaiv yuav tsum tau muab coj los ntawm qhov kev sib deev ntawm qhov casting. Txhawm rau txiav txim siab qhov loj ntawm cov qauv, tus neeg yuav khoom yuav tsum tau qhia rau tus neeg muag khoom txog ntu tseem ceeb ntawm qhov casting. Yog tias tus neeg thov tsis muaj kev xav tsis zoo, tus neeg muag khoom tuaj yeem teeb tsa txoj haujlwm txiav ntawm qhov casting thiab txiav txim siab txoj kab uas hla ntawm tus qauv.