Gr.5 titanium alloy, uas yog ib qho tseem ceeb siab - cov khoom siv ua haujlwm, yog dav siv hauv kev lag luam tiv thaiv, aerospace, cov cuab yeej kho mob thiab lwm yam kev lag luam vim nws lub zog tshwj xeeb, zoo heev corrosion kuj, tsawg ntom thiab zoo biocompatibility. Nrog nws cov kev ua tau zoo, nws tau dhau los ua cov khoom siv rau kev txhim kho kev ua tau zoo thiab lub teeb yuag ntawm riam phom thiab khoom siv. Tam sim no, nyob rau hauv thaj av ntawm cov tub rog thaj av-raws li riam phom, nws feem ntau cov neeg sawv cev thov cov ntaub ntawv muaj xws li M1A1 lub ntsiab sib ntaus sib tua tank, M2 Bradley sib ntaus sib tua tsheb thiab lub teeb 155 hli howitzer M777. Nrog rau kev txhim kho ntawm kev tshawb fawb thiab thev naus laus zis, cov kev xav tau rau kev ua haujlwm siab thiab lub teeb yuag ntawm riam phom thiab khoom siv tau nce ntxiv. Txawm li cas los xij, qhov qis hardness thiab tsis zoo hnav tsis kam ntawm titanium alloys feem ntau txwv lawv daim ntawv thov hauv kev ua tub rog.
Tom qab qhov saum npoo ntawm Gr.5 titanium alloy yog kho los ntawm ion nitriding, TiN thiab Ti2N theem yog tsim, thiab cov qauv siv lead ua ntawm cov theem no kuj ua tiav thiab txiav txim. Lub microstructure ntawm nitrided txheej yog qhia nyob rau hauv daim duab 1. Qhov nruab nrab hardness ntawm Gr.5 titanium alloy qauv uas tsis muaj nitriding kev kho mob yog 345HV, thiab tom qab nitriding kev kho mob, qhov nruab nrab hardness ncav cuag 430HV, uas yog 25% siab tshaj li ntawm cov khoom siv hauv paus. Qhov tawv tawv ntawm Gr.5 titanium alloy yog qhov zoo dua qub, feem ntau yog vim qhov kev txhawb nqa ntawm qhov kub thiab txias ntawm tus cwj pwm diffusion ntawm nitrogen atoms thiab tsim cov txheej nitride. Thaum lub sij hawm cov txheej txheem ion nitriding, nitrogen atoms tsim ib txheej nitride nrog siab hardness ntawm cov khoom nto, zoo ua rau lub hardness ntawm titanium alloy. Tom qab qis-kub nitriding kev kho mob, ib txheej nitride uas muaj TiN thiab Ti2N yog tsim rau ntawm qhov chaw ntawm Gr.5 titanium alloy. Cov nitrides ntawm titanium muaj qhov nyuaj heev, thiab cov txheej nitride yog qhov ntom. Kev tsim thiab tsub zuj zuj ntawm nitride txheej rau ntawm qhov chaw ntawm titanium alloy ua rau qhov nce hauv qhov tawv tawv.
