Weldability Analysis Ntawm Titanium Thiab Titanium Alloys

(1) Embrittlement tshwm sim los ntawm interstitial keeb kis kab mob

Titanium muaj zog tshuaj tiv thaiv kev ua haujlwm ntawm qhov kub thiab txias. Titanium sai absorbs hydrogen saum 300 degree, oxygen siab tshaj 600 degree, thiab nitrogen saum 700 degree. Yog li ntawd, yog tias titanium tsis muaj kev tiv thaiv zoo thaum lub sij hawm vuam txheej txheem thiab tom qab vuam txheej txheem, nws yuav ua rau tsis muaj zog plasticity thiab nce brittleness. Qhov loj feem ntawm cov pa roj carbon monoxide nyob rau hauv cov ntaub ntawv titanium yog tswj hauv qab 0.1%. Thaum cov pa roj carbon ntau tshaj nws cov solubility, tsim cov tawv thiab nkig TiC, thiab ib qho reticulate tis, yooj yim los tsim cov kab nrib pleb.

(2) Thermal tawg

Vim tias cov ntsiab lus tsis zoo ntawm titanium thiab titanium alloy, nws tsis yooj yim los tsim thermal tawg. Txawm li cas los xij, yog tias qhov zoo ntawm cov hlau tsis tsim nyog, tshwj xeeb tshaj yog tias muaj cov kab nrib pleb, interlayers thiab lwm yam tsis xws luag hauv cov hlau. Thaum muaj impurities ntau dua, vuam kub tawg yuav tshwm sim.

(3) Kev tawg qeeb tuaj yeem tshwm sim hauv thaj chaw tshav kub

Thaum welding, hydrogen nyob rau hauv lub pas dej ua ke thiab cov khoom siv hauv qhov chaw qis kub diffuses mus rau hauv qhov chaw muaj kev kub ntxhov, uas ua rau hydrogen tsub zuj zuj hauv thaj chaw kub thiab tawg nyob rau hauv cov kev ntxhov siab tsis zoo.

(4) Cavitation

Porosity yog qhov tsis zoo tshaj plaws hauv titanium thiab titanium alloy vuam. Feem ntau muaj ob hom porosity nyob rau hauv nruab nrab ntawm cov weld thiab fusion kab porosity. Thaum lub zog vuam loj, qhov porosity feem ntau nyob ze ntawm txoj kab fusion. Lub ntsiab yog vim li cas rau kev tsim ntawm weld porosity yog qhov weld cheeb tsam, tshwj xeeb tshaj yog lub taub qab kawg lub ntsej muag, yog kis los ntawm noo noo thiab roj.