Titanium alloy hlau txhaj tshuaj molding

Titanium alloy hlau txhaj tshuaj molding

Cov khoom thiab cov kev pab cuam muab los ntawm Qinhuangdao Zhongwei Precision Machinery Co., Ltd. tuaj yeem tsis tsuas yog ua tau raws li cov kev xav tau ntawm cov neeg siv khoom, tab sis kuj tshaj qhov lawv xav tau. Peb tawm tswv yim ob lub hauv paus ntsiab lus ntawm kev ua tau zoo thiab tus nqi.

Qinhuangdao Zhongwei Precision Machinery Co., Ltd., nrhiav tau nyob rau hauv 1997, nyob rau hauv Huangdianzhuang Development Zone, Changli, Qinhuangdao. Hauv xyoo 2013, nws tau lees paub tias yog lub tuam txhab me me thiab nruab nrab ntawm kev siv thev naus laus zis los ntawm Lub Tsev Haujlwm Saib Xyuas Kev Tshawb Fawb thiab Tshuab ntawm Hebei Xeev; Hauv xyoo 2014, nws tau lees paub tias yog tub rog kev koom ua ke kev lag luam los ntawm Hebei Provincial Bureau of Defense Science, Technology thiab Industry; Hauv 2019, nws tau ntsuas raws li kev lag luam high-tech.

Txij li thaum lub tuam txhab koom tes nrog Central South University, thaum lub sij hawm kev sib koom kev tshawb fawb ntawm titanium txhaj tshuaj molding txheej txheem nyob rau hauv 2017, tom qab ntau tshaj li ib xyoos, nws tau tam sim no officially tsim. Lub ntsiab titanium alloy cov ntaub ntawv, ntshiab titanium, tc4 thiab lwm yam ntaub ntawv yog tag nrho cov txheej txheem ntawm peb kev tshawb fawb.

Qee cov titanium alloy hlau txhaj tshuaj molding khoom tsim los ntawm Qinhuangdao Zhongwei Precision Machinery Co., Ltd
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01/Kev Taw Qhia

 

Titanium thiab titanium alloys suav nrog yuav luag ib nrab ntawm cov hlau ntom ntom. Lawv muaj qhov qis qis, zoo corrosion tsis kam, siab lub zog thiab txaus siab biocompatibility. Lawv tau siv dav hauv aviation, aerospace, tshuaj lom neeg kev lag luam, biomedicine thiab lwm yam kev lag luam, thiab coj cov txiaj ntsig kev lag luam loj rau tib neeg lub neej, tshwj xeeb tshaj yog hloov cov pob txha tsis raug xws li cov hniav hniav, cov hauv paus hniav thiab cov pob qij txha nrog tib neeg cog. Titanium thiab titanium alloys yog cov khoom zoo uas tuaj yeem pab tau tib neeg.

 

Txawm li cas los xij, qhov teeb meem nyuaj tshaj plaws hauv cov hmoov llurgy yog yuav ua li cas txo lossis zam qhov tshwm sim ntawm oxidation ntawm titanium thiab titanium alloys. Raws li kev soj ntsuam ntawm tus qauv dawb lub zog-kub daim duab kos duab ntawm oxides kos los ntawm Gibbs Free Zog, tus nqi txo oxidized titanium los yog titanium alloys rov qab rau l yog loj, uas tsis yog nyob rau hauv txoj kab nrog cov txiaj ntsig kev lag luam. Qhov no yog vim li cas titanium thiab titanium ua ke hauv cov hmoov kuj. Qhov tsis zoo ntawm cov txheej txheem llurgical, piv nrog cov ntaub ntawv hauv tsev neeg hlau, poob qhov zoo ntawm kev ua cov nqi. Nws tsis yog qhov xav tsis thoob tias qhov zoo ntawm titanium thiab titanium alloys nyob rau hauv cov tsoos bulk ua ntau ntau dua li cov hmoov llurgy, uas yog thawj yam uas cov hmoov llurgy practitioners yuav tsum paub.

 

02 Cov Lus Qhia rau Kev Txaus Siab

Txhawm rau ua tiav hauv cov hmoov txhaj tshuaj molding ntawm titanium thiab titanium alloys, cov hauv qab no yuav tsum tau txais kev pom zoo:

 

Yog tias peb cia siab tswj cov ntsiab lus oxygen ntawm cov hmoov pib, cov ntsiab lus oxygen ntawm cov hmoov yuav tsum tau tswj qis dua 3000 ppm, nyiam dua tsawg dua 1000 ppm, thiab tsuas yog thaum cov hmoov uas tsis tshua muaj cov ntsiab lus oxygen yog yuav cov khoom zoo.

 

Nyob rau hauv tus txheej txheem ntawm degreasing, yuav tsum tau them nyiaj mloog mus rau lub sij hawm ntawm cov tshuaj tiv thaiv nrog oxygen. Cov hmoov sib tov thiab cov ntawv khi yuav tsum tau nqa tawm hauv qhov chaw tiv thaiv, kev txhaj tshuaj molding yuav tsum txo qis kom txo cov cua sov thiab tuav lub sijhawm, cov txheej txheem degreasing yuav tsum tau tiv thaiv los ntawm kev txo cov pa roj los yog hloov los ntawm kev txo qis oxalic acid degreasing, thiab sintering hauv lub tshuab nqus tsev lossis tiv thaiv huab cua tam sim ntawd. degreasing.

 

Kev tsim ntawm sintered bearing phaj thiab kev txhawb nqa system siv zirconia phaj thiab daim txhuam cev me me titanium sacrificial kev npaj uas tsis yooj yim rau preempted los ntawm titanium los pab txo cov pa oxygen hauv sintering system.

 

Qhov sib ntxiv ntawm cov pa oxygen-rushing Cheebtsam, xws li magnesium, hauv cov khoom siv hmoov yuav ua rau muaj kev hloov pauv ntawm cov titanium thiab titanium alloys, thiab tsis zoo zog ntawm titanium thiab titanium alloys tom qab sintering.

 

Hauv qab no, peb yuav qhia qee qhov kev txiav txim siab d ntawm kev tsim khoom dhau los.

 

2.1, Xaiv cov hmoov

 

Kev siv cov hmoov uas tsis muaj cov pa oxygen yog qhov kev xaiv zoo tshaj plaws rau kev txhaj tshuaj molding ntawm titanium thiab titanium alloys, uas txhais tau hais tias cov hmoov yog cov hmoov sib txuas los ntawm txoj kev aerosol, uas yog txias nyob rau hauv siab los ntawm inert gas. Cov hmoov yog loj thiab puag ncig nrog cov ntsiab lus tsis tshua muaj oxygen. Tam sim no, cov hmoov tseem ceeb yog Carpenter hauv Tebchaws Meskas thiab Sandvik hauv tebchaws United Kingdom. Qhov luaj li cas ntawm cov hmoov yog haum rau d50=10~12um, uas yog me me heev. Hmoov yog yooj yim rau oxidize thiab cov txheej txheem yog txaus ntshai; dej atomization txoj kev yog me me thiab ntxhib, thiab qhov loj me me ntawm cov tshuab crushing yog loj heev kom haum rau kev txhaj tshuaj molding txheej txheem; Lwm txoj kev xav txhawb kev siv titanium hydride (HTi) hmoov kom tshem tawm cov hydrogen thiab ua kom cov hmoov sib tov nrog lub zog siab xws li kev kho ntshav ntshav. Txawm hais tias tus nqi ntawm kev tau txais cov khoom siv raw yog tsawg heev, patent kev tsis sib haum xeeb thiab kev nqis peev hauv cov cuab yeej tswj tau siab heev, uas tseem tsis tau muaj thoob ntiaj teb.

 

2.2 Binder formula

 

Titanium thiab titanium alloys muaj ob lub tshuab pub khoom noj. Nws tau pom tias cov qauv zoo dua li qhov ntau ntawm Shrinkage los ntawm 1.166 txog 1.220 raws li qhia hauv Table 1 hauv qab no. Cov formulations twb muaj nyob rau hauv kev ua lag luam.

 

muaj peev xwm 1: Binder formulation ntawm Titanium thiab Titanium Alloys

OSF=Oversize Shrinkage Factor

 

Vim yog oxidation ntawm titanium thiab titanium alloys, nws tau pom zoo tias qhov ntim ntawm l nyob rau hauv cov formulation ratio yuav tsum tsis txhob ntau tshaj 63 feem pua, yog li kom tsis txhob muaj kev sib txhuam ntawm cov hmoov hauv kev txhaj tshuaj molding thiab feedstock mixing. Thaum qhov kev sib txhuam kub siab dhau lawm, qhov ua tau ntawm oxidation yuav nce.

 

2.3 Daim ntawv ceeb toom rau kev npaj khoom noj

 

Kev saib xyuas tshwj xeeb yuav tsum tau them rau kev tswj hwm ntawm qhov kev txiav txim ntawm cov khoom noj khoom haus thiab qhov kub thiab txias ntawm cov khoom noj sib xyaw, raws li tau piav qhia hauv Table 2. Cov txheej txheem sib xyaw ntawm ob hom feedstock yog pom zoo. Nws tau pom tias cov txheej txheem sib tov yuav tsum tau ua los tiv thaiv huab cua kom tshem tawm cov pa oxygen. Nws tseem raug sau tseg tias tag nrho cov macromolecule binder hais los yog hmoov yuav tsum tau qhuav kom ntseeg tau tias tsis muaj noo noo, siv quav ciab thiab stearic acid, uas nyuaj rau qhuav, tsis tshua muaj molecular binders. Nws tau pom zoo tias cov dej yuav raug tshem tawm los ntawm lub tshuab nqus tsev kub tsawg.

 

表 2. Cov lus qhia txog kev sib xyaw feedstock

 

03 Cov txheej txheem loj

 

Thaum cov khoom noj ua tiav kom txog thaum txhaj tshuaj molding, nws yog lub xeev zoo tshaj plaws ntawm tag nrho cov hmoov, uas tuaj yeem raug rau huab cua, tab sis thaum lub sij hawm cua sov ntawm cov txheej txheem txhaj tshuaj, yuav tsum tau saib xyuas kom tsis txhob cia cov khoom noj nyob hauv lub thoob rau ib yam nkaus. ntev. Thaum cov txheej txheem txhaj tshuaj ntawm cov yas-d feedstock ua tsis tiav thiab kho lub tshuab, nws yog ib qho tsim nyog los teeb tsa qhov kub ntawm lub nozzle thiab qhov kub siab tshaj plaws hauv 10 feeb thiab txiav tawm qhov kub thiab txias yog tias tsis ua hauj lwm, kom qhov ntsuas kub ntawm lub nozzle yog qis dua. 150 degree.

 

Titanium thiab titanium alloy billets tom qab txhaj tshuaj molding tsis txawv ntawm cov khoom siv l thiab tuaj yeem tso rau hauv huab cua. Titanium thiab titanium alloy hmoov coated nrog binder tuaj yeem thaiv cov pa oxygen hauv huab cua. Tom qab degreasing, txawm hais tias hnyav degreasing los yog txo qis oxalic acid degreasing (tsis pom zoo oxidized nitric acid degreasing), ua ntej ntawm tag nrho cov, kom ntseeg tau tias qhov kub thiab txias tawm hauv lub cub tawg yuav tsum qis dua 50 degree. Celsius los xyuas kom meej tias oxidation tsis tshwm sim, lub degreased Brown billet yog ntxeem tau, yooj yim heev rau react nrog oxygen nyob rau hauv cov huab cua, thov nco ntsoov. Lub sij hawm luv luv ntawm qhov muab cov xim av billet sab nraud, qhov zoo dua, nws yuav nkag mus rau hauv sintering system kom sai li sai tau.

 

Kev tsim ntawm sintered txhawb phaj thiab sintering lub thawv yog qhov tseem ceeb heev. Vim tias titanium thiab titanium alloys muaj cov pa oxygen siab, lawv tuaj yeem ntes cov pa hauv alumina (Al2O3) ntawm qhov kub thiab txias. Yog li ntawd, zirconia phaj (ZrO2) yog pom zoo rau ceramic bearing phaj, tab sis cov khoom ntawm carbonization los yog nitriding yuav tsum tsis txhob xaiv. Titanium thiab titanium alloys kuj nyiam affinity rau carbon thiab nitrogen ntsiab. Nyob rau hauv yav dhau los sintering kev, qhov chaw ntawm titanium daim txhuam cev nyob rau hauv lub sintering lub thawv raws li ib tug sacrificial block ntawm oxygen grabbing yog zoo tab sis txo cov efficiency ntawm lub sintering rauv. Nws siv ntau titanium daim txhuam cev ntawm ib lub sij hawm, nyob qhov chaw thiab siv cov cua kub tsis zoo.

 

Cov kev paub dhau los no tau koom nrog hauv kev tsim cov titanium thiab titanium alloy hmoov txhaj tshuaj molding. Cov neeg ua haujlwm yuav tsum ceev faj. Lub xeev ntawm ntshiab titanium hmoov muaj kev pheej hmoo siab. Cov non-ferrous ls (qhov ntom < 4.5g / cc) tag nrho muaj kev pheej hmoo ntawm cov plua plav tawg, txawm hais tias titanium thiab titanium alloys yog qhov tsawg tshaj plaws uas tsis yog-ferrous ls.