Yuav Ua Li Cas Tswj Nto Oxidation Ntawm Titanium Alloy Forgings?

Titanium yog yooj yim heev rau oxidation thaum kub forging, tsim ib txheej embrittlement uas ua rau tawg thiab ua nyuaj. Qhov ntawd txo qis kev ua haujlwm ntawm forgings. Cov txheej txheem tiv thaiv oxidation zoo yog qhov tseem ceeb rau kev txhim kho kev ntseeg tau thiab kev lag luam ntawmtitanium alloy forgings.

 

(I) Tsim Mechanism ntawm Oxide Txheej

Qhov saum npoo reacts nrog oxygen nyob rau hauv lub cub tawg los ua peb - txheej oxide zaj duab xis thaum lub sij hawm kub forging.

Peb - txheej oxide zaj duab xis: ib txheej txheej txheej ntawm TiO₂, txheej nruab nrab ntawm TiO-Ti₃O cov theem sib xyaw, thiab cov pa sab hauv- txhawb nqa -theem embrittlement txheej.

Lub -theem yog qhov tseem ceeb ntawm kev txiav txim siab rau forging tsis ua hauj lwm, thiab nws thickness nce exponentially nrog kub nce.

 

(II) Cov Ntsiab Lus cuam tshuam
Kub thiab Sijhawm: Tus nqi oxidation nce 30% rau txhua txhua 100℃qhov kub thiab txias

Alloy Hom: -titanium alloys raug oxidation tseem ceeb ntawm 600 degree, thaum -titanium alloys tsuas yog tsim ib qho kev pom tseeb oxide txheej ntawm qhov kub siab tshaj 980℃.

Atmosphere Ib puag ncig: Cov pa oxygen concentration hauv lub cub tawg txiav txim siab oxidation tus nqi. Kev tiv thaiv nitrogen tuaj yeem txo tus nqi, thiab kev tiv thaiv roj inert muaj txiaj ntsig zoo dua.

 

Titanium forgings hauv Ruihang

 

(I) Huab Cua Tiv Thaiv Technology
Inert Gas Protection: Nruam qhia siab -purity argon lossis helium (purity Ntau dua lossis sib npaug li 99.99%), txo cov oxidation ntau dua 60%. Mitsubishi Electric siv argon tiv thaiv kom ruaj khov oxide txheej thickness ntawm 0.1-0.3mm, nrog rau kev tsim nyog tus nqi ntawm 98%.

Kev Tswj Ib puag ncig lub tshuab nqus tsev: Lub tshuab nqus tsev kawm qib siab dua lossis sib npaug ntawm 10⁻³Pa tuaj yeem cais tawm cov pa oxygen, haum rau siab -cov khoom tseem ceeb, tab sis cov khoom siv yog tus nqi siab.

Loose Material Heating: Granular nruab nrab cua sov ua kom muaj kev hloov pauv hluav taws xob ntau dua, ua kom lub sijhawm siab - kub raug thiab inhibiting oxidation los ntawm qhov chaw.

 

(II) Txheej Txheem Parameter Optimization
Kev tswj qhov kub thiab txias: Tswj cov cua kub ntawm 20-50℃hauv qab ntawm qhov kub-transus kom txo cov oxide txheej thickening.

Precise Time Management: Txhim kho txoj kev deformation los ntawm cov lej simulation kom luv lub sij hawm nyob tsis zoo nyob rau hauv qhov siab - qhov kub thiab txias.

Lub tswv yim ua kom txias: Txais kev ua kom txias kom tsis txhob muaj kev tshaj tawm -forging siab - kub oxidation thiab txo qhov kev pheej hmoo ntawm oxide txheej spallation.

 

(III) Kev Tiv Thaiv Kev Hloov Kho Nto

 

Hom txheej txheem	Technical Parameters	Core Zoo	Daim ntawv thov Scenario
Ua ntej-Kev kho oxidation	Ua ib zaj duab xis oxide tuab ntawm 300-400 degree	Oxidation hnyav nce tus nqi txo los ntawm 20% ntawm 500 degree	Nruab nrab- qhov kub thiab txias cov khoom siv
Anodic oxidation	Voltage 20-60V, H₂SO₄ electrolyte	Corrosion kuj nce 50%, zaj duab xis thickness 10-30μm	Kev kho mob cog, cov khoom siv hluav taws xob
Micro{0}}Arc Oxidation (MAO)	High-voltage electrolysis ntawm 300-600V, composite TiO₂/Al₂O₃ txheej	Kub tiv taus ≥500 degree, hnav thiab cavitation kuj	Aero- cav hniav, marine li qub
B+(B-Al) Composite Diffusion	Khoom hmoov embedding, isothermal kho ntawm 800 degree	Oxidation hnyav nce tus nqi txo los ntawm 83.5%, hardness 1800HV	Gr5 Cheebtsam nyob rau hauv siab -kub ua hauj lwm tej yam kev mob

 

Faj seeb: B + (B-Al) composite diffusion thev naus laus zis tau txais kev sib koom ua ke ntawm TiB₂ txheej txheej txheej + Al₃Ti sab hauv tus kheej- kev tiv thaiv, ua rau qhov hnyav nce tsuas yog 7.24 g / m² rau Gr5 alloy tom qab oxidation ntawm 800 degree. rau 10 teev

 

(IV) Composite Protection System
Cov txheej txheem ua ke ntawm "pre-oxidation + iav enamel txheej + argon tiv thaiv" tuaj yeem txhim kho qhov zoo thiab cov yas zoo ib txhij. Cov kev sim qhia tau hais tias BT3-1 titanium alloy forgings kho nrog qhov sib xyaw ua ke no muaj qhov chaw du yam tsis muaj qhov tsis zoo ntawm cov ntses, thiab qhov kev tu tom ntej tau nce 40%.

 

(I) Oxide Layer Detection Methods
Kev tsom xam Microscopic: Saib xyuas cov txheej txheem oxide txheej siv Scanning Electron Microscopy (SEM) nrog cov tuab ntsuas qhov tseeb ntawm 0.1μm;

Kev Tshawb Fawb Txog Kev Tshawb Fawb: Siv spectral tsom xam los txiav txim siab qib ntawm nitrogen thiab hydrogen paug, tsis txhob muaj kev pheej hmoo embrittlement;

Kev ntsuas kev ua tau zoo: Ntsuas qhov ruaj khov ntawm cov oxide zaj duab xis siv Electrochemical Impedance Spectroscopy (EIS), tsim nyog rau kev cog qoob loo.

(II) Oxide Layer Cleaning Txheej Txheem
Mechanical Cleaning: Sandblasting tuaj yeem tshem tawm 0.13-0.76mm ntawm oxide nplai, yuav tsum tau txais kev pab them nqi ntau dua lossis sib npaug li 200% kom tsis txhob muaj kev puas tsuaj rau substrate;

Tshuaj Pickling: Ib qho kev sib xyaw ntawm nitric acid thiab hydrofluoric acid tshem tawm - cov ntaub ntawv txheej nrog tus nqi tu ntawm 0.03mm / min, tshem tawm 0.25-0.38mm ntawm txheej txheej hauv ib qho kev kho mob;

Kho Tshuab: Laser cladding kho pitting tsis xws luag ntawm tus nqi tsuas yog 25% ntawm qhov tshiab; PVD recoating kho txheej spallation, nrog adhesion ntsib ASTM D3359 tus qauv.

 

(I) Aerospace Field
Cheebtsam: Gr5 titanium alloy cav compressor hniav, tsaws iav;

Txheej txheem: MAO ceramic txheej + tua peening, cua sov ntawm lub tshuab nqus tsev kawm ntawv ntawm 10⁻³Pa;

Cov nyhuv: Oxide txheej thickness Tsawg dua los yog sib npaug li 0.2 hli, qaug zog tiv thaiv tau nce los ntawm 30%, txheej kev ncaj ncees tshuaj xyuas txhua 500 lub sijhawm davhlau.

 

(II) Medical Field
Cheebtsam: Artificial pob qij txha, pob txha daim hlau;
Txheej Txheem: Electropolishing + anodic oxidation;
Cov nyhuv: Biocompatibility raws li cov qauv, oxide zaj duab xis impedance tuav tus nqi ＞ 80% 2 xyoos tom qab kev phais.

 

(III) Chemical Industry Field

Cheebtsam: Reactor agitator paddles, flanges;
Txheej txheem: Tshuaj passivation + PTFE txheej;
Cov nyhuv: Corrosion kuj txhim kho, txhua xyoo corrosion tsawg dua los yog sib npaug li 0.1mm.

 

Ruihang yog tshwj xeeb hauv R & D, tsim khoom thiab muag khoom ntawm- zoo titanium thiab titanium alloy cov khoom, suav nrog forgings, kav, nplhaib, tuav, phaj thiab lwm yam khoom titanium thiab lwm yam. Yog xav paub ntxiv, thov hu rau peb ntawm Email:Sam.Rui@bjrh-titanium.com