Kab lus no qhia txog qhov tsis zoo thiab cov teeb meem ntawm cov tsoosflangetxheej txheem forging, thiab ua ib qho kev tshawb fawb tob txog kev tswj cov txheej txheem, txoj kev tsim, kev siv cov txheej txheem, forging soj ntsuam thiab tom qab forging thaum tshav kub kub kev kho mob ntawm flange forgings nyob rau hauv ua ke nrog rau tej rooj plaub. Tsab ntawv tshaj tawm cov phiaj xwm ua kom zoo rau cov txheej txheem flange forging thiab ntsuas cov txiaj ntsig zoo ntawm txoj kev npaj no. Cov kab lus muaj qee tus nqi siv.

Lub drawbacks thiab teeb meem ntawm tsoos flange forging txheej txheem

Rau feem ntau ntawm cov tuam txhab forging, lub hom phiaj tseem ceeb hauv cov txheej txheem ntawm flange forging yog nyob rau hauv kev nqis peev thiab kev txhim kho cov cuab yeej forging, thaum cov khoom siv raw cov txheej txheem feem ntau tsis quav ntsej. Raws li kev soj ntsuam, feem ntau ntawm cov chaw tsim khoom feem ntau siv cov tshuab sawing thaum lawv siv, thiab feem ntau lawv siv semi-automatic thiab tsis siv neeg band saws. Qhov tshwm sim no tsis tsuas yog txo cov kev ua tau zoo ntawm cov khoom siv qis, tab sis kuj muaj qhov teeb meem loj ntawm kev ua hauj lwm thiab pom cov kua paug paug tshwm sim. Hauv cov txheej txheem flange forging cov txheej txheem feem ntau yog siv rau hauv cov txheej txheem qhib tuag forging, qhov tseeb forging ntawm cov txheej txheem no kuj tsis tshua muaj, qhov hnav thiab tsim kua muag ntawm cov tuag yog loj, nws muaj lub neej tsawg ntawm forgings thiab cov xwm txheej phem xws li raws li kev tuag.

Txheej txheem optimization ntawm flange forgings

FORGING PROCESS CONTROL

(1) Kev tswj hwm lub koom haum cov yam ntxwv. Flange forging feem ntau yog martensitic stainless hlau thiab austenitic stainless hlau ua raw cov ntaub ntawv, daim ntawv no xaiv 1Cr18Ni9Ti austenitic stainless hlau rau flange forging. Qhov no stainless hlau tsis muaj isotropic heterocrystalline transformation, yog hais tias nws yog rhuab mus txog 1000 ℃, nws muaj peev xwm kom tau ib tug kuj zoo xws li cov koom haum austenitic. Tom qab ntawd, yog tias cov hlau tsis muaj cua sov tau txias sai, ces lub koom haum austenitic tau txais tuaj yeem khaws cia rau hauv chav sov. Yog hais tias lub koom haum yog qeeb-txias, ces nws yog ib qho yooj yim mus tshwm alpha theem, uas ua rau lub kub lub xeev ntawm stainless hlau plasticity yog heev txo. Stainless hlau kuj yog ib qho tseem ceeb vim li cas rau kev puas tsuaj ntawm intergranular corrosion, qhov tshwm sim yog vim lub cim ntawm chromium carbide nyob rau hauv lub grain ntug. Vim li no, qhov tshwm sim ntawm carburization yuav tsum zam kom deb li deb tau.
(2) nruj me ntsis ua raws li cov cua kub specifications, thiab tswj tau zoo ntawm forging kub. Thaum cua sov 1Cr18Ni9Ti austenitic stainless hlau nyob rau hauv lub cub tawg, qhov saum npoo ntawm cov khoom yog heev nquag carburization. Yuav kom txo tau qhov tshwm sim ntawm no phenomenon, yuav tsum
Tsis txhob sib cuag ntawm cov hlau tsis muaj steel thiab cov khoom muaj carbon. Vim tias qhov tsis zoo thermal conductivity ntawm 1Cr18Ni9Ti austenitic stainless hlau nyob rau hauv qhov kub thiab txias, nws yuav tsum tau rhuab maj mam. Kev tswj xyuas qhov kub thiab txias tshwj xeeb yuav tsum tau ua raws li kev ua raws li qhov nkhaus hauv daim duab 1.

Figure.1 1Cr18Ni9Ti austenitic stainless hlau cua kub tswj
(3) flange forging txheej txheem kev tswj xyuas. Ua ntej tshaj plaws, cov txheej txheem tshwj xeeb yuav tsum tau ua raws li nruj me ntsis kom xaiv cov khoom siv raw rau cov khoom siv. Ua ntej cua sov cov khoom yuav tsum yog ib qho kev soj ntsuam ntawm cov khoom nto, kom tsis txhob tawg, folding thiab inclusions nyob rau hauv cov khoom raw thiab lwm yam teeb meem. Tom qab ntawd, thaum forging, nws yuav tsum tau hais kom maj mam tuav cov khoom nrog tsawg deformation ua ntej, thiab tom qab ntawd ntaus nyuaj thaum lub plasticity ntawm cov khoom nce. Thaum chim siab, lub sab sauv thiab qis kawg yuav tsum tau chamfered los yog crimped, thiab ces qhov yuav tsum tau flattened thiab ntaus dua.

FORMING METOD THIAB DIE DESIGN

Thaum txoj kab uas hla tsis tshaj 150mm, lub pob tw weld flange tuaj yeem tsim los ntawm kev qhib header forming method nrog cov txheej txheem tuag. Raws li pom nyob rau hauv daim duab 2, nyob rau hauv lub qhib tuag txheej txheem, nws yuav tsum tau muab sau tseg hais tias qhov siab ntawm lub upsetting dawb paug thiab qhov ratio ntawm lub ncoo tuag aperture d yog zoo tshaj plaws tswj ntawm 1.5 - 3.0, lub vojvoog ntawm lub qhov tuag fillet R yog. Qhov zoo tshaj plaws 0.05d - 0.15d, thiab qhov siab ntawm qhov tuag H yog 2mm - 3mm qis dua qhov siab ntawm forging yog tsim nyog.

Fig. 2 Qhib tuag txheej txheej txheem
Thaum txoj kab uas hla tshaj 150mm, nws yog advisable xaiv lub flange taub qab vuam txoj kev ntawm ca nplhaib flanging thiab extrusion. Raws li pom hauv daim duab 3, qhov siab ntawm qhov khoob H0 yuav tsum yog 0.65 (H + h) - 0.8 (H + h) nyob rau hauv txoj kev tiaj tiaj flanging. Kev tswj xyuas qhov kub thiab txias tshwj xeeb yuav tsum tau ua raws li kev ua raws li qhov nkhaus hauv daim duab 1.

Fig. 3 Lub nplhaib tig thiab extrusion txoj kev

KEV PAB CUAM THIAB FORGING INSPECTION

Hauv daim ntawv no, cov txheej txheem stainless hlau bar shearing yog siv thiab ua ke nrog kev siv cov txheej txheem shearing los xyuas kom meej qhov zoo ntawm cov khoom hla ntu. Tsis yog siv cov pa qhib tuag forging txheej txheem, kaw precision forging txoj kev yog saws. Txoj kev no tsis tsuas yog ua rau forging
Txoj kev no tsis tsuas yog txhim kho qhov tseeb ntawm forging, tab sis kuj tshem tawm qhov ua tau ntawm kev tuag tsis raug thiab txo cov txheej txheem ntawm ntug txiav. Txoj kev no tsis yog tsuas yog tshem tawm kev noj cov khoom seem, tab sis kuj tshem tawm qhov xav tau ntawm cov cuab yeej txiav ntug, ntug txiav tuag, thiab cov neeg ua haujlwm txiav ntug. Yog li ntawd, kaw precision forging txheej txheem yog qhov tseem ceeb heev kom txuag tau cov nqi thiab txhim kho kev tsim khoom. Raws li cov kev xav tau, lub zog tensile ntawm qhov sib sib zog nqus forgings ntawm cov khoom no yuav tsum tsis txhob tsawg dua 570MPa thiab elongation yuav tsum tsis pub tsawg tshaj 20%. Los ntawm kev coj mus kuaj hauv qhov tob ntawm phab ntsa tuab ib feem los ua qhov ntsuas ntsuas thiab ua qhov ntsuas tensile, peb tuaj yeem tau txais tias lub zog tensile ntawm forging yog 720MPa, yield zog yog 430MPa, elongation yog 21.4%, thiab seem shrinkage yog 37%. . Nws tuaj yeem pom tias cov khoom ua tau raws li qhov yuav tsum tau ua.

POST-FORGING KEV KHO MOB

1Cr18Ni9Ti austenitic stainless hlau flange tom qab forging, them nyiaj tshwj xeeb rau cov tsos ntawm intergranular corrosion tshwm sim, thiab txhim kho cov yas ntawm cov khoom kom ntau li ntau tau, kom txo lossis txawm tias tshem tawm cov teeb meem ntawm kev ua hauj lwm hardening. Txhawm rau kom tau txais kev tiv thaiv corrosion zoo, lub forging flange yuav tsum tau kho cov cua sov kom zoo, rau lub hom phiaj no, cov forgings yuav tsum tau kho cov tshuaj kho. Raws li kev soj ntsuam saum toj no, cov forgings yuav tsum tau ua kom sov kom tag nrho cov carbides yaj mus rau hauv austenite thaum qhov kub ntawm qhov kub ntawm 1050 ° C - 1070 ° C. Tam sim ntawd tom qab ntawd, cov khoom tsim tau txias sai heev kom tau txais cov qauv ib-theem austenite. Raws li qhov tshwm sim, qhov kev ntxhov siab corrosion tsis kam thiab ua haujlwm rau crystalline corrosion ntawm forgings tau zoo heev. Hauv qhov no, kev kho cua sov ntawm cov forgings raug xaiv los ua los ntawm kev siv forging khib nyiab kub quenching. Txij li thaum forging khib nyiab cua sov quenching yog ib tug high-temperature deformation quenching, nws piv nrog cov pa tempering, tsis tsuas yog tsis yuav tsum tau lub cua sov yuav tsum tau quenching thiab quenching khoom thiab lwm yam configuration tus neeg teb xov tooj yuav tsum tau, tab sis kuj cov kev ua tau zoo ntawm forgings tsim siv cov txheej txheem no ntau npaum li cas. zoo dua.

Kev txheeb xyuas cov txiaj ntsig zoo

Kev siv cov txheej txheem optimized los tsim cov flange forgings zoo txo ​​cov nyiaj siv ua haujlwm thiab tuag nqes hav ntawm forgings, txuag cov ntaub ntawv raw rau qee yam. Kev siv cov saws tes thiab txiav cov kua dej txo qis hauv cov txheej txheem forging, uas txo cov khoom siv zoo heev. Nrog rau kev qhia txog forging pov tseg thaum tshav kub kub tempering txoj kev, tshem tawm lub zog yuav tsum tau rau thermal quenching.

Xaus

Nyob rau hauv tus txheej txheem ntawm kev tsim flange forgings, cov txheej txheem tshwj xeeb yuav tsum tau ua raws li qhov pib, ua ke nrog cov kev tshawb fawb niaj hnub thiab thev naus laus zis los txhim kho cov txheej txheem forging ib txwm thiab txhim kho cov phiaj xwm ntau lawm.