Papa 19 Titanium Alloy Bar

ʻO ka wehewehe ʻana o ka Papa 19 Titanium Alloy Bar

ʻO ka papa 19 (Ti-3Al-8V-6Cr-4Zr-4Mo) Alloy (UNS R58153) he ʻano beta. ʻO ka huila titanium (UNS R58640) He metastable kēia māka
beta titanium alloy i ʻike ʻia no kona ductility kūʻokoʻa i ke kūlana i mālama ʻia (annealed), a no kona ikaika kiʻekiʻe a
ductility i loko o ka hopena i mālama ʻia a me ke kūlana kahiko (STA). Hiki ke hoʻokō ʻia nā waiwai tensile i ka wā e mālama ai
ductility maikaʻi a me ka modulus haʻahaʻa o ka elasticity. Maikaʻi ka ikaika luhi ma ke kūlana STA.

Hana ʻia kēia huila e kekahi o nā ʻano hoʻoheheʻe kumu ʻelua: vacuum arc (VAR) a i ʻole plasma arc cold-hearth melting (PAM).
ʻO ka hoʻoheheʻe mua ʻia e ukali ʻia e ka hoʻoheheʻe ʻana i ka ʻawaʻawa. ʻO nā ʻano huahana maʻamau, ʻo ia ka billet i hoʻopaʻa ʻia, ka lāʻau i ʻōwili ʻia, i ʻōwili ʻia a/a i ʻole lāʻau huki, a
uwea. Loaʻa kēia mau huahana i nā noi i ka aerospace ikaika kiʻekiʻe a me nā noi pāʻoihana, nā ʻāpana hana, ke kinoea a me ka ʻaila.
nā ʻōnaehana paipu i lalo a me nā mea hana, a me nā pūnāwai coil ikaika kiʻekiʻe a me nā mea paʻa. Hiki ke hoʻohana ʻia ka alloy Titanium grade 19 no ka lōʻihi
nā manawa ma nā wahi wela kiʻekiʻe ma lalo o 660°F (349°C).

NUI & PALAPALA

SAE AMS 4957 – Bar a me ka Uea

SAE AMS 4958 – Bar a me Rod

ASTM B 348 Papa 19 – Bar a me Billet

Nine haku mele 'ana

Hōʻike ʻia ka haku mele ʻana o ka papa 19 Ti 3Al 8V 6Cr 4Zr 4Mo alloy ma ka papa aʻe.

NA HALE KUPAIA

Ka Heehee: 2,830°F – 3,000°F (1,554 – 1,649°C)

Māmā: 0.174 lbs/in3

(4.82 gm/cm3)

Wela Kūikawā @ 70°F (21°C), 0.123 Btu/lb °F (515 J/kg °K)

Beta Transus Mahana: maʻamau 1,350°F +/-25°F (732°C +/-14°C)

Elastic Modulus: As-rolled / solution ht: 13 – 14 Mpsi

Hoʻoponopono i mālama ʻia + makahiki: 14 – 16 Mpsi.

KA Lapaʻau wela

No nā noi ikaika kiʻekiʻe, ʻo ka mālama ʻana i ka wela ka mea maʻamau me ka annealing solution a ukali ʻia e ka ʻelemakule i ka wā o ka huahana hope

hana hana. ʻO ke kiʻi anuanu ma mua o ka ʻelemakule e hoʻonui i ka ikaika, ʻoiai e mau ana ka ductility maikaʻi. ʻO ka hoʻonā annealing pono

hana ʻia ma kahi o 50°F (28°C) ma luna o ka mahana transus, ʻoi aku ka maikaʻi ma ka laulā o 1,450 – 1,700°F (788-927°C), a me ka huahana

hiki ke hoʻomaloʻo i ka ea a i ʻole ka wai kinai. Loaʻa ka ʻelemakule ma nā mahana o 850 – 1,000°F (454 – 538°C) no 4 a 24 mau hola me ka ea

hooluolu. Hiki ke hoʻololi ʻia ka manawa ʻelemakule a me ka mahana no ka loaʻa ʻana o ka pae ikaika i makemake ʻia.

IKE

ʻO ka paʻakikī maʻamau i ka hopena annealed kūlana hiki ke loaʻa mai 250-300 HB. Ma ke kūlana STA, hiki i nā pae paʻakikī

350-440 HB.

KA MANAO

Maikaʻi loa ka formability, a hiki i nā pae ductility o 60-70% RA no kahi huahana huki anu 30% ma hope o ka annealing solution.

HOOLAHA

ʻO ka papa 19 Titanium alloy bar ka mea hiki ke hana maikaʻi i ka hana ʻana i nā kūlana wela a i ʻole mehana i ka laulā preheated o 1,500-1,900°F (816-

1,038 ° C).

KA MINI

Ma keʻano laulā, loaʻa i nā alloys titanium ka machinability mai nā kila kila austenitic annealed a hiki i ka 1/4-paʻakikī a me ka 1/2-paʻakikī.

nā kila. ʻO ka papa 19 Titanium alloy machines e like me Ti-13V-11Cr-3Al a me nā ʻāpana beta titanium ʻē aʻe i ka hopena i mālama ʻia a ʻelemakule.

kūlana. ʻAʻole ʻōlelo ʻia nā wai hoʻoluʻu i loko o ka chlorine.

HOOLAHA

Hiki ke wiliwili ʻia ka alloy Titanium papa 19 ma ke kūlana hoʻonā-annealed. Eia nō naʻe, pono e mālama ʻia i ka weld i kahi kaiapuni inert (a i ʻole

e hoʻopaʻa pono i ka uhi ʻia ʻana o ke kinoea inert i ka wā wili) e pale aku i ka nui o ka nitrogen a i ʻole ka lawe ʻana i ka oxygen. ʻO nā welds paha

i hoʻoikaika ʻia e ka ʻelemakule, me ka nalowale o ka ductility. ʻAʻole pono e hana ʻia ka welding ma hope o ka hoʻonā + wela makahiki

na lapaau.