Titanium Alloy Casting Pickling Technology
1. Cov khoom siv raw thiab cov khoom siv
Pickling Solution Raw Khoom
Saib rau Table 1.
Khoom siv
Pickling Tank: Ua los ntawm cov hlau tsis muaj steel, lined nrog rigid polyvinyl chloride (PVC) yas panels, los yog tag nrho ua los ntawm PVC yas yas.
Kub tswj & qhov cua: Lub tank pickling yog nruab nrog lub tshuab cua txias, ntsuas kub, tiv thaiv- evaporation npog, thiab tso pa tawm.
Fixtures & Qhuav: Fixtures thiab clamps yog ua los ntawm titanium alloy los yog tiv thaiv -coated stainless hlau. Cov khoom ziab ziab ua haujlwm ntawm qhov kub siab tshaj ntawm 105 degree.
2. txheej txheem ntws
Sandblasting kom tshem tawm Oxide Scale → Organic Solvent Cleaning → Cold Rinse → Pickling → Cold Water Rinse → Flowing Cold Water Rinse → Spray Rinse → Drying → Quality Inspection
Kev ntxuav cov roj: roj av, ethanol, lossis acetone.
Kev tshem tawm ntiv tes tom qab Pickling: Ntxuav nrog 1: 1 acetone thiab butanol sib tov, ces so nrog industrial ethanol.
3. Pickling tshuaj
Kev daws 1feem ntau yog siv rau titanium alloy castings, thaumKev daws 2yog siv rau corrosion-resistant titanium alloys.
Xa mus rau Table 2.
4. Pickling kev ua haujlwm
Txoj kev ua haujlwm: Castings yuav tsum tau txav mus los los yog swung kom muaj kev sib cuag nrog cov kua qaub txaus.
Kev Tswj Kub Kub: Saib xyuas qhov kub thiab txias los tiv thaiv overheating.
Lub Sijhawm Tswjhwm: Lub sij hawm pickling yog txiav txim los ntawm cov khoom txo tus nqi. Thaum pib, ntsuas qhov tuab lossis xam qhov poob qis tom qab 1-5 feeb.
Kev Siv Dej Rinsing Requirements:
Dej txias hauv qab chav sov lossis dej sov (30-60 degree).
Kev tu dej tiv taus Ntau dua lossis sib npaug ntawm 1200Ω·cm (25 degree), TDS Tsawg dua lossis sib npaug ntawm 600mg / L, pH 5.5–8.5.
Qhuav: Siv roj-dawb compressed cua los yog qhov cub.
5. Pickling Solution Management
Cov tshuaj yog npaj los ntawm kev ntxiv tshuaj nyob rau hauv proportions thiab stirring tusyees. Cov kua qhov tob yuav tsum tsis pub tshaj ob -feem peb ntawm lub tank qhov tob.
Titanium ion concentration yuav tsum tau soj ntsuam txhua plaub lub lis piam. Yog tias nws tshaj 25 g / L thiab tus nqi pickling tsis txaus, cov tshuaj yuav tsum muab pov tseg.
Cov kua dej khib nyiab yuav tsum raug kaw thiab ua tiav los ntawm lub koom haum tsim nyog.
6. Acid Gas Purification
Acid gases generated thaum lub sij hawm pickling yuav tsum tau purified ua ntej tso tawm kom tau raws li ib puag ncig qauv.
7. Kev Tswj Xyuas Zoo
Kev tshuaj xyuas qhov tshwm sim
Qhov saum npoo yuav tsum du nrog cov xim hlau nplaum lossis tshwm nyiaj -dawb lossis grey-dawb.
Tsis muaj pitting, unremoved stains, roj paug, ntiv tes, los yog mechanical puas.
Hydrogen Cov ntsiab lus tswj
Khaws cov tshuaj muaj pes tsawg leeg thiab tswj qhov kub thiab txias kom tsis txhob nqus hydrogen.
Kev ntsuas cov ntsiab lus hydrogen ua raws GB / T 4698.15.
Yog tias cov ntsiab lus hydrogen ntau dua 0.003%, tshawb xyuas qhov ua rau thiab ua lub tshuab nqus tsev vacuum (saib rau Table 3).
Alpha Txheej Tswj
Lub alpha txheej ntawm qhov chaw casting yuav tsum tau muab tshem tawm tag nrho tom qab pickling.
Cov kev tshuaj xyuas muaj xws li metallographic lossis microhardness kuaj. Yog tias pom cov seem seem, rov-pickling yuav tsum tau.
Kev soj ntsuam zaum kawg
Cov txheej txheem saum npoo roughness tsis muaj oxide txheej, roj, ntiv tes, lossis lwm yam kab mob.
Kev ntsuas dej ntshiab: Tsis muaj dej zaj duab xis tawg tom qab immersion.
Sandblasting yuav tsum tsis txhob deformation, thiab blasting cov ntaub ntawv yuav tsum tau xyuas tsis tu ncua.
Cov txheej txheem no nruj me ntsis ua raws li lub teb chaws cov qauv kom ntseeg tau tias pickling zoo thiab ib puag ncig kev nyab xeeb.
