Hom Thiab Kev Siv Ntawm Titanium Alloys|Siab Toughness|Siab zog|Kev kho cua sov

titanium alloys yog alloys tsim los ntawm titanium raws li lub hauv paus thiab lwm yam alloying ntsiab. Titanium alloy tuaj yeem muab faib ua cov qauv titanium alloy thiab kub-resistant titanium alloy, los yog -type titanium alloy, -type titanium alloy thiab + -type titanium alloy.

I. Kev txhim kho keeb kwm ntawm titanium alloy

Titanium yog ib qho tseem ceeb ntawm cov qauv hlau tsim nyob rau xyoo 1950, thiab ntau tus neeg hauv ntiaj teb tau lees paub qhov tseem ceeb ntawm titanium alloy cov ntaub ntawv, thiab tau ua kev tshawb fawb thiab kev loj hlob ntawm lawv thiab tau txais cov ntaub ntawv siv tau.

Lub tswv yim titanium alloy yog lub tebchaws United States nyob rau hauv 1954, txoj kev vam meej ntawm Ti-6Al-4V alloy, vim hais tias ntawm nws tshav kub tsis kam, lub zog, plasticity, toughness, formability, weldability, corrosion kuj thiab biocompatibility zoo dua, thiab dhau los ua kev lag luam titanium alloy, cov alloy tau suav nrog kev siv tag nrho cov titanium alloys, 75% mus rau 85%. Ntau lwm cov titanium alloys tuaj yeem suav tias yog nws qhov kev hloov kho.

Industrialized zus tau tej cov titanium yog pib nyob rau hauv 1948. 1950s rau 1960s, feem ntau yog kev loj hlob ntawm high-temperature titanium alloys rau aircraft engine thiab structural titanium alloys rau airframes, tsim ib tug xov tooj ntawm corrosion-resistant titanium alloys nyob rau hauv lub 1970s, thiab corrosion-resistant titanium. alloys thiab high-strength titanium alloys tau tsim ntxiv txij li xyoo 1980s. Kev siv kub ntawm cov cua sov-resistant titanium alloy tau nce los ntawm 400 degree hauv xyoo 1950 mus rau 600-650 degree hauv xyoo 1990, yog li ntawd titanium siv rau hauv lub cav los ntawm qhov txias kawg ntawm lub cav (kiv cua thiab compressor) mus rau kub kawg ntawm lub cav (turbine) kev taw qhia. Cov txheej txheem titanium alloys rau siab zog, siab plasticity, siab zog thiab siab toughness, siab modulus thiab siab siab kam rau siab kev taw qhia.

Txij li thaum xyoo 1970s, cov duab cim xeeb xws li Ti-Ni, Ti-Ni-Fe, thiab Ti-Ni-Nb kuj tau tshwm sim thiab tau txais kev siv dav hauv engineering.

Tuam Tshoj pib tshawb fawb txog titanium thiab titanium alloys hauv xyoo 1956; industrialized zus tau tej cov titanium pib nyob rau hauv nruab nrab -1960s thiab TB2 alloy tau tsim.
Thib ob, lub ntsiab kev faib tawm ntawm titanium alloy

Titanium muaj ob hom homogeneous heterocrystals: titanium alloy titanium yog homogeneous isomer, melting point ntawm 1668 degree, nyob rau hauv tsawg dua 882 degree yog ib tug tuab kab ntawm hexagonal lattice qauv, hu ua -titanium; nyob rau hauv 882 degree saum toj no lub cev-centered cubic lattice qauv, hu ua -titanium.

Kev siv cov titanium cov yam ntxwv sib txawv ntawm cov qauv saum toj no, ntxiv cov ntsiab lus alloying tsim nyog, kom lub sijhawm hloov pauv kub thiab theem cov ntsiab lus maj mam hloov thiab tau txais cov koom haum sib txawv ntawm titanium alloys.

Nyob rau hauv chav tsev kub, titanium alloys muaj peb hom matrix lub koom haum, titanium alloys kuj muab faib ua peb pawg: -alloys, (+) alloys thiab -alloys. Hauv Suav teb, cov hlau no raug xa mus rau TA, TC thiab TB feem.

Alpha titanium alloy

Nws yog ib-theem-theem alloy tsim los ntawm-theem khoom tov, uas yog-theem, ruaj khov lub koom haum, siab hnav tsis kam tshaj titanium ntshiab, thiab muaj zog oxidation tsis kam, ob qho tib si ntawm qhov kub thiab txias ntawm kev siv tswv yim. Nyob rau hauv qhov kub ntawm 500 degree -600 degree, nws tseem tuav nws lub zog thiab creep tsis kam, tab sis nws tsis tuaj yeem muaj zog los ntawm kev kho cua sov, thiab nws lub zog kub hauv chav tsis siab.

Titanium alloy

Nws yog ib-theem-theem alloy muaj li ntawm -phase khoom tov, uas muaj lub zog siab yam tsis muaj kev kho cua sov, thiab ntxiv dag zog tom qab quenching thiab aging, chav tsev kub lub zog tuaj yeem ncav cuag 1372-1666MPa; Txawm li cas los xij, nws muaj qhov tsis zoo thermal stability, thiab tsis tsim nyog siv rau qhov kub thiab txias.

+ titanium alloy

Nws yog ob-theem alloy nrog kev ua tau zoo, kev ruaj ntseg zoo, zoo toughness, plasticity thiab high-temperature deformation zog, zoo kub siab ua, quenching, laus kom cov alloy muaj zog. Tom qab kev kho cua sov, lub zog yog li 50% siab dua lub xeev annealed; Lub zog kub kub, tuaj yeem ua haujlwm ntev ntawm qhov kub ntawm 400 degree txog 500 degree, thiab nws cov thermal stability yog thib ob rau titanium alloy.

Ntawm peb hom titanium alloys, -titanium alloy thiab + -titanium alloy feem ntau siv; -titanium alloy muaj machinability zoo, + -titanium alloy yog qhov thib ob zoo tshaj plaws, thiab -titanium alloy tsis zoo.