Titanium alloys muaj tsawg ntom ntom, txom nyem molten fluidity, thiab qis dua casting flow flow. Tsis tas li ntawd, qhov sib txawv loj sib txawv ntawm cov casting thiab pwm kub (kwv yees 300 tawm℃ua rau nws yooj yim rau pores, txawm tias thaum muab cov cua tiv thaiv. Cov tsis zoo no ua rau muaj kev cuam tshuam zoo ntawm cov casting. Cov tswv yim tseem ceeb rau kev kho cov tshuaj xyuas saum npoo titanium Forgings yog summarized hauv qab no:
1. Kev tshem tawm ntawm cov txheej txheem nto
Cov txheej txheem saum npoo av yog qhov tseem ceeb ua rau muaj kev cuam tshuam rau lub cev thiab tshuaj lom neeg ntawm titanium Forgings. Cov txheej txheem paug no yuav tsum muab tshem tawm kom meej meej ua ntej polishing kom ua tiav cov nyhuv zoo tshaj plaws. Kev sib xyaw ntawm sandblasting thiab pickling yog pom zoo.
1. Sandblasting:
Dawb corundum abrasive yog pom zoo rau co coarse sandblasting.
Kev tswj siab siab yog qhov tseem ceeb: sandblasting siab dua li uas siv rau cov tsis yog-cov hlau, feem ntau hauv qab 0.45 MPa. Kev ua kom ntau dhau los ua rau cov lus teev xuab zeb los cuam tshuam rau cov nplaim titanium, tsim cov nplaim taws thiab huab cua sov. Qhov no tuaj yeem ua rau cov txheej txheem sab saum toj sib txawv, sib sau cov txheej txheej tshiab thiab kev hloov ua kom zoo. Lub sij hawm tswj: Lub sijhawm Sandblasting yuav tsum yog 15-30 vib nas this. Lub hom phiaj tsuas yog los tshem cov xuab zeb, sintered txheej, thiab ib nrab oxide txheej ntawm cov npoo nrum. Qhov seem ntawm cov txheej txheem sib txawv
2. Pickling Kev Kho Mob:
Pickling tuaj yeem nrawm nrawm thiab ua kom huv si tshem tawm cov txheej txheem saum npoo av thiab tsis tshua muaj peev xwm ua kom muaj lwm yam.
Pickling System Xaiv:
HF-HCL system: Muaj peev xwm tshem tawm muaj zog, tab sis tej zaum yuav ua rau muaj kev nqus hydrogen ntau.
HF-HNO3 system: Hydrogen kev nqus. Lub hydrogen nqus txoj kev nyiam yuav tswj tau los ntawm kev kho lub HNO3 kev xav tau pab txo cov kev nqus hydrogen kev nqus). Cov kab ke no tseem muab qee qhov chaw ntawm cov nyhuv ua rau muaj txiaj ntsig thiab pom zoo.
Cov lus pom zoo mloog: HF siab yuav tsum tau tswj hwm ntawm 3% thiab 5%; HNO3 mev yuav tsum tau tswj hwm ntawm 15% thiab 30%.
Ii. Kev kho mob ntawm Casting tej yam tsis zoo
Sab hauv porosity thiab shrinkage porosity:
Kub iSostatic nias (hip) tuaj yeem siv los tshem tawm sab hauv kev tsis meej siv siv kub thiab kub siab. NCO TSEG: Kev kho mob hip yuav cuam tshuam me ntsis rau qhov tseeb ntawm qhov chaw ntawm seem.
Lwm txoj kev daws teeb meem (siv XOr
Cov Porosity Deg: Ncaj Laser Vuam yuav siv rau kev kho ib puag ncig.
III. Sib tsoo thiab polishing
Titanium muaj cov tshuaj lom neeg muaj kev sib tsoo zoo, thiab cov txiaj ntsig siab, sib tsoo sib tsoo) thiab cov tshuaj tiv thaiv yooj yim nrog cov abrasive.
1. Mechanical sib tsoo:
Kev xaiv Abrasive: Decog Abrasives tsis haum. Ultra-nyuaj abrasives nrog zoo thermal condactivity, xws li ua pob zeb diamond lossis cubic nitride (CBN), yog pom zoo.
Kab ceev tswj: Polishing kab kev nrawm yuav tsum nruj me ntsis tswj tau nyob rau hauv ntau ntawm 900-1800 m / min. Kev siv ntau nrawm nrawm tuaj yeem yooj yim ua rau sib tsoo hlawv (hauv zos overheating) thiab microcacks ntawm titanium nto.
2. Tshuaj Polishing:
Lub hauv paus ntsiab lus: nto smoothing thiab polishing yog ua tiav los ntawm kev siv cov redox tshuaj tiv thaiv ntawm cov hlau hauv kev siv tshuaj tsw qab. Cov txiaj ntsig: Polishing restrant yog ywj siab ntawm lub titanium lub hardness, polishing cheeb tsam, lossis qauv qauv; Txhua thaj chaw hauv kev sib cuag nrog cov kua roj polishing yog uniformly polished; cov cuab yeej yuav tsum tau ua yog qhov yooj yim thiab ua haujlwm yooj yim; Tshwj xeeb yog haum rau polishing complex titanium ntu (xws li cov dav hlau cav sib xyaw ua ke).
Cov ntsiab lus tshwj xeeb:
Sandblasting: Qes Siab (tsawg dua los yog sib npaug rau 0.45 MPa), Tsawg Duration (15-30 vib nas this), coarse dawb corundum blasting tsuas yog yoog cov duab xuab zeb tsuas yog txheej av / ib nrab oxide txheej.
Acid Pickling: HF (3-5%) - HTO3 (15-30%) yog qhov zoo dua rau kev ua kom haum, thiab lub ntsej muag ci.
Kho kom haum: rau sab hauv kev tsis xws luag, tau paub txog qhov tseeb cuam tshuam) lossis xoo hluav taws xob muab kev sib tsoo + laser vuam yog nyiam; Rau qhov pores nto, ncaj liner vuam yog pom zoo.
Sib tsoo thiab polishing: suprasive abrasives (pob zeb diamond / CBN) yuav tsum tau siv, thiab txoj kab kev ceev yuav tsum tau tswj (900-1800 m / min) kom tiv thaiv kom tsis txhob kub hnyiab thiab tawg. Tshuaj lom neeg polishing yuav suav hais tias yog qhov chaw nyuaj.
Lub tuam txhab khav ua cov khoom lag luam hauv tsev titanium ua ntau lawm, nrog rau:
German-imported precision titanium raj ntau lawm kab (txhua xyoo muaj peev xwm ntau lawm: 30,000 tons);
Japanese-technology technology tentanium ntawv ci rolling kab (thinnest rau 6μm);
Qoos motated titanium qws txuas ntxiv mus rau kab extrusion;
Ntse titanium phaj thiab sawb fining;
MES system ua noj digital tswj thiab kev tswj hwm ntawm tag nrho cov txheej txheem ntau lawm, ua tiav cov khoom lag luam seem ntawm ± 0.01M.
