Yam khoom dab tsi yog Qib 7 Titanium

1.Dab tsi yog cov khoom siv qib 7 Titanium?

Qib 7 titanium yog alag luam ntshiab titanium alloy(CP titanium alloy) cais raws li tus qauv ASTM B265. Nws yog tshwj xeeb yog titanium-palladium (Ti-Pd) alloy, txawv los ntawm nws qhov kev xav ntxiv ntawm ib qho me me ntawm palladium los txhim kho corrosion kuj-tshwj xeeb tshaj yog nyob rau hauv kev txo cov cheeb tsam uas unalloyed titanium yuav tawm tsam. Tsis zoo li siab -lub zog titanium alloys (piv txwv li, Qib 5 Ti-6Al-4V), Qib 7 muab qhov tseem ceeb ntawm kev ua haujlwm corrosion dhau lub zog siv tshuab, ua rau nws mus rau cov khoom siv rau kev ua tshuaj lom neeg, dej hiav txwv, thiab cov ntawv thov kev lag luam uas yuav tsum tau ua haujlwm ntev rau cov dej hnyav. Nws khaws cov txiaj ntsig tseem ceeb ntawm cov titanium ntshiab, xws li qhov ntom ntom (≈4.51 g / cm³), biocompatibility zoo heev, thiab zoo formability, thaum hais txog cov kev txwv corrosion ntawm cov qib unalloyed (piv txwv li, Qib 2, Qib 4).

2.Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm qib 7 titanium?

Cov tshuaj muaj pes tsawg leeg ntawm Qib 7 titanium yog nruj me ntsis raws li cov qauv ASTM (ASTM B265, ASTM F67) kom ntseeg tau tias kev ua tau zoo ib yam. Hauv qab no yog covraug thiab siab tshaj plaws muaj pes tsawg leeg(los ntawm qhov hnyav feem pua, wt%):

Element	Cov ntsiab lus raug (wt%)	Cov ntsiab lus tso cai siab tshaj plaws (wt%)
Titanium (Ti)	Tshuav	Tshuav
Palladium (zeeg)	0.12–0.25	0.10–0.25
Hlau (Fe)	Tsawg dua los yog sib npaug li 0.20	0.30
Cov pa roj carbon (C)	Tsawg dua los yog sib npaug li 0.03	0.08
Nitrogen (N)	Tsawg dua lossis sib npaug li 0.015	0.05
Hydrogen (H)	Tsawg dua los yog sib npaug li 0.005	0.015
Cov pa oxygen (O)	Tsawg dua lossis sib npaug li 0.18	0.20
Lwm Yam Khoom (Txhua)	Tsawg dua lossis sib npaug li 0.10	0.10
Lwm Yam Khoom (Tag nrho)	Tsawg dua los yog sib npaug li 0.40	0.40

Ntsiab Lus: Palladium yog qhov tseem ceeb alloying lub ntsiab lus - nws muaj (txawm tias nyob rau theem qis) txhim khu kev tiv thaiv rau hydrochloric acid (HCl), sulfuric acid (H₂SO₄), thiab lwm yam uas txo cov kua qaub los ntawm stabilizing titanium oxide txheej. Cov impurities (piv txwv li, Fe, O, C) nruj tswj kom tsis txhob muaj kev cuam tshuam corrosion los yog cov khoom siv kho tshuab.

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3.Dab tsi yog qhov nyuaj ntawm qib 7 titanium?

Lub hardness ntawm Qib 7 titanium nyob ntawm nwsKev kho cua sov hauv xeevthiabtxoj kev ua(eg, annealed, txias{2}}ua haujlwm). Hauv qab no yog cov qauv hardness qhov tseem ceeb rau tej yam kev mob, ntsuas siv tus qauv ntsuas:

1. Lub Xeev Annealed (Feem ntau)

Annealing (feem ntau 650-750℃rau 1-4 teev, ua raws li cua txias) softens cov khoom rau formability thaum tuav corrosion kuj.

Brinell Hardness (HB): 110–150 HB (siv lub 3000 kg load thiab 10 mm inch tungsten carbide ball).

Vickers Hardness (HV): 120-160 HV (500 g load, 10-15 thib ob nyob lub sijhawm).

Rockwell Hardness (HR): 70–85 HRB (B- nplai, rau cov hlau softer) lossis 20–30 HRC (C- nplai, tsawg dua rau qib 7).

2. Txias-Lub Xeev Ua Haujlwm

Kev ua haujlwm txias (piv txwv li, dov, forging, kos duab yam tsis muaj annealing tom ntej) ua rau muaj zog ntxiv los ntawm kev qhia txog kev tsis sib haum xeeb hauv titanium lattice.

Brinell Hardness (HB): 180–220 HB (mob ua haujlwm txias, ~ 20–30% txo hauv cheeb tsam).

Vickers Hardness (HV): 190–230 HV.

Rockwell Hardness (HR): 85–95 HRB or 30–35 HRC.

3. Cov ntsiab lus tseem ceeb

Hardness yog inversely cuam tshuam rau ductility: txias- ua hauj lwm Qib 7 yog ib qho nyuaj tab sis tsawg formable tshaj cov khoom annealed.

Piv nrog rau lwm cov qib CP titanium: Qib 7 muaj qhov hardness zoo sib xws rau Qib 2 (annealed: ~ 120–140 HB) tab sis yog me ntsis nyuaj dua Qib 1 (annealed: ~ 100–120 HB) vim palladium ntxiv thiab nruj impurity tswj.

Hardness qhov tseem ceeb tsis yog rau siab - hnav daim ntaub ntawv- Qib 7 yog xaiv rau corrosion kuj, tsis puas kuj. Rau kev hnav- siv tau yooj yim, titanium alloys nrog ntau dua alloying (xws li Ti-6Al-4V) lossis kev kho saum npoo (xws li nitriding) yog nyiam.

Yam khoom yog Qib 7 Titanium