Kev kho mob Ti-6Al-7Nb rau K-wire (kirschner hlau)

Kev kho mob Ti-6Al-7Nb rau K-wire (kirschner hlau)

Ti-6Al-7Nb alloy yog ib qho kev cog lus zoo rau tib neeg cog. Nws muaj lub zog siab, zoo heev corrosion kuj, biocompatibility, tsis muaj teeb meem rau tib neeg lub cev, thiab tseem muaj qhov zoo ntawm cov yas muaj zog thiab zoo heev abrasiveness. Nws yog qhov muaj peev xwm ua rau muaj kev phom sij ntawm V hauv cov pa Ti-6Al-4V alloy rau tib neeg implantation uas txhawb txoj kev loj hlob ntawm biological Ti alloy yam tsis muaj V, thiab yuav tsum xeeb Ti-6Al{{ 5}}NB alloy. Cov hlau yog tus cwj pwm los ntawm kev hloov Nb rau V. nws cov khoom siv tshuab yog sib npaug ntawm Ti-6A1-4V. Nws lub dav hlau tawg toughness yog li 10 feem pua ​​​​siab dua li Ti-6A-4V. Nws tau siv dav hauv kev kho mob txawv teb chaws thiab muaj kev nyiam zoo los hloov Ti-6Al-4V alloy.

1. Kev sim

Cov khoom siv sim yog ua los ntawm qib {{{0}}} daim txhuam cev tshwj xeeb titanium, sib xyaw raws li hom thiab lub koob npe nrov alloy muaj pes tsawg leeg, nias electrode pawg vuam, melted rau hauv 370mm alloy ingot peb zaug hauv lub tshuab nqus tsev arc rauv, thiab nws (a) yog ntsuas los ntawm metallographic method ntxiv rau ) / Theem hloov taw tes (TB) ingot yog tev tawm ntawm qhov chaw, hauv qab ntawm lub ingot raug txiav tawm, thiab rhuab mus rau hauv theem cheeb tsam, lub billet yog forged los ntawm ib tug 2500 tuj roj. xovxwm, qhov chaw tsis xws luag yog hauv av, thiab ces rhuab mus rau ob-theem cheeb tsam. Nws yog dov mus rau hauv 9.5mm bar xaim dawb paug ob zaug, thiab tom qab ntawd rhuab mus rau sab qis ntawm theem hloov pauv. Tom qab 30kW lub tshuab nqus tsev thiab 11kw reel kos duab tshuab, nws tau rov ua kom sov thiab ntau hom kos rau Φ4.0mm hauv qab ntawm Kirschner cov xov hlau feem ntau yog annealed, straightened, polished, kho cua sov thiab kuaj los ntsuas cov khoom ntawm cov hlau.

2. Qhov tshwm sim thiab qhov xaus

2.1 Ti-6a1-7nb titanium alloy transformation point thiab ingot tshuaj muaj pes tsawg leeg

Lub sijhawm hloov pauv ntawm Ti-6Al-7Nb titanium alloy yog 965 degree , thiab tshuaj lom neeg muaj pes tsawg leeg ntawm Ti-6Al-7Nb titanium alloy ingot yog qhia hauv Table 1 Cov ntaub ntawv nyob rau hauv lub rooj yog ntsuas ntsuas tus nqi ntawm lub ingot nrog lub hau thiab hauv qab tshem tawm ntawm lub ingot thiab coj ntawm 300 hli los ntawm ob qho kawg, uas ua tau raws li qhov yuav tsum tau ntawm gb / t13810 tus qauv rau titanium thiab titanium alloy ua cov ntaub ntawv rau kev phais phais. . Qhov sib txawv ntawm qhov sib txawv yog me me thiab sib xws.

Table 1 Ti-6Al-7Nb ingot tshuaj muaj pes tsawg leeg

2.2 Table 2 qhia tau hais tias chav tsev kub txhua yam khoom ntawm cov xov hlau kos ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv. Los ntawm cov ntaub ntawv nyob rau hauv lub rooj, nws yuav pom tau hais tias chav tsev kub mechanical zog ntawm cov xov hlau tau kos ntawm qhov sib txawv ntawm qhov kub thiab txias ntawm tib lub specification (qhov kawg kos duab kub) sib txawv heev. Qhov no yog vim qhov sib txawv ntawm kev ua haujlwm kub cuam tshuam qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov txheej txheem deformation, txawm hais tias cov txheej txheem ntawm kev ua haujlwm kub deformation yog nrog cov txheej txheem ntawm cov cuab yeej rov qab. Tab sis tib lub sij hawm, nws kuj ua rau cov tsub zuj zuj ntawm hardening. Yog tias qhov kev ua haujlwm kub siab dua, lub zog hardening Performance index yuav qis dua. Ntawm qhov tsis sib xws, yog tias qhov ua haujlwm kub qis dua, lub zog hardening yuav zoo dua. Cov txiaj ntsig tau pom tias qhov kev hloov pauv kub ntawm ti-6a1-7nb alloy zoo li txav mus rau hauv qab nrog qhov nce ntawm tensile deformation, thiab cov txheej txheem kub yuav tsum tau kho downward.

Table 2 Mechanical zog ntawm hlau tom qab ua tiav

2.3 Table 3 Nws yog hais txog chav tsev kub ntawm cov khoom siv hluav taws xob ntawm cov xov hlau uas tau kos rau tib qhov tshwj xeeb ntawm qhov sib txawv ntawm qhov kub thiab txias thiab annealed nyob rau hauv tib lub annealing system. Nws tuaj yeem pom los ntawm cov ntaub ntawv hauv cov lus hais tias cov cuab yeej cuab tam lub zog Performance index hloov me ntsis tom qab kev ntxhov siab annealing, tab sis qhov elongation thiab txo ntawm thaj tsam ntawm cov yas ntsuas tom qab tawg tau zoo dua. Cov kev tshawb fawb qhia tau hais tias cov khoom ntawm ti-6a-7nb hlau npaj los ntawm kev kos duab kub yog qhov tsis ruaj khov heev. Nws yog ib qho tsim nyog los tshem tawm kev ntxhov siab los ntawm kev kho cua sov, ua kom cov hlau mos, txhim kho nws cov khoom zoo, thiab pab txhawb kev ua tiav ntawm cov txheej txheem ncaj thiab polishing.

Table3 Mechanical zog ntawm hlau tom qab annealed

Xaus

1) Rau kev ua haujlwm ntawm ti-6a1-7nb titanium alloy high-strength hlau, cov cua sov xaiv tau txav mus nrog qhov nce ntawm deformation. Lub realization ntawm lub zog siab yog nyob ntawm qhov tsub zuj zuj ntawm hardening rau ib yam twg.

2) Kev ua tau zoo ntawm ti-6a1-7nb titanium alloy hlau tom qab kev kho cua sov ntawm 510-530 degree rau 4-8h thiab rauv cua txias zoo dua.