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tc4鈦及鎳基合金-鈦合金系列
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度4.51g/cm3HRCHRC30左右目錄1材料簡介2試件制備3離子注入條件4硬度測量材料簡介播報編輯線膨脹系數(shù)=8.6*10-6℃（0-100℃），比熱=0.612j/g·℃。鈦合金的彈性模量較低。的彈性模量E=110GPa，約為鋼的1/2，故鈦合金加工時容易產(chǎn)生變形。其泊松比為0.34。 (Ti-6Al-4V)和TA7(Ti-5Al-2.5Sn)鈦合金，采用兩種注入方案進行表面改性，試驗表明，鈦合金經(jīng)離子注入后，提高了顯微硬度，顯著地降低了滑動摩擦系數(shù)，有效地提高了耐磨性.為探明其改性機理，對注入與未注入樣品進行了X射線光電子能譜(XPS)分析，獲得滿意的結(jié)果.試件制備播報編輯選航空用的、TA7鈦合金，試件制成圓盤狀，尺寸為40*5mm，所有試件表面均拋光至鏡面.離子注入條件播報編輯兩種鈦合金都分別采用兩種注入方案：① 在及TA7鈦合金試件上濺射鍍Ti，Ti膜總厚度為540nm(5400A).在鍍Ti膜過程中，同時用(N+ +N+2)進行動態(tài)反沖注入，束流能量為50keV，束流密度為45μA/cm2，劑量為7*1017/cm2，靶室真空度為1.33*10-2Pa；② 在①的基礎(chǔ)上，再注入C+，束流能量為40keV，劑量為3*1017/cm2.硬度測量播報編輯用HXD-1000數(shù)字式顯微硬度計測量了注入與未注入試件的顯微硬度，測量載荷為4.9×10-2N，測量結(jié)果列于表1.表1 顯微硬度測量結(jié)果材料 表面狀態(tài) 顯微硬度/MPa 硬度提高倍數(shù)未注入 2690 0 注入(N+ +N+2) 6399 1.38注入(N+ +N+2)+C+ 3436 0.28未注入 3133 0TA7 注入(N+ +N+2) 4276 0.36注入(N+ +N+2)+C+ 4073 0.30從表1看出，離子注入后，試件的顯微硬度都有不同程度的提高，其中鈦合金注入(N+ +N+2)混合束后硬度約提高1.4倍. [1]● 熱膨脹系數(shù)：鈦合金具有優(yōu)良的耐蝕性、小的密度、高的比強度及較好的韌性和焊接性等一系列優(yōu)點，在航空航天、石油化工、造船、汽車，醫(yī)藥等部門都得到成功的應(yīng)用?！疋伜辖鹆W性能：抗拉強度σb/MPa≥895,規(guī)定殘余伸長應(yīng)力σr0.2/MPa≥825,伸長率δ5(%)≥10,斷面收縮率ψ(%)≥25●鈦合金密度:4.5（g/cm3）工作溫度-100～550（℃）●鈦合金化學成分:含鈦(Ti) 余量,鐵(Fe)≤0.30,碳(C)≤0.10,氮(N)≤0.05,氫(H)≤0.015,氧(O)≤0.20,鋁(Al)5.5～6.75,釩(V)3.5～4.5新手上路成長任務(wù)編輯入門編輯規(guī)則本人編輯我有疑問內(nèi)容質(zhì)疑在線客服官方貼吧意見反饋投訴建議舉報不良信息未通過詞條申訴投訴侵權(quán)信息封禁查詢與解封?2025?Baidu?使用百度前必讀?|?百科協(xié)議?|?隱私政策?|?百度百科合作平臺?|?京ICP證030173號?京公網(wǎng)安備11000002000001號window.PAGE_DATA= 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說明： 鈦合金TC4材料的組成為Ti-6Al-4V，屬于(α+β)型鈦合金，具有良好的綜合力學機械性能。比強度大。TC4的強度sb=1.012GPa，密度g=4.4*103，比強度sb/g=23.5，而合金鋼的比強度sb/g小于18。 鈦合金熱導率低。 鈦合金的熱導率為鐵的1/5、鋁的1/10，TC4的熱導率l=7.955W/m·K。硬度測量?：用HXD-1000數(shù)字式顯微硬度計測量了注入與未注入試件的顯微硬度，測量載荷為4.9×10-2N，測量結(jié)果列于表1.表1 顯微硬度測量結(jié)果材料 表面狀態(tài) 顯微硬度/MPa 硬度提高倍數(shù)未注入 2690 0TC4 注入(N+ +N+2) 6399 1.38注入(N+ +N+2)+C+ 3436 0.28未注入 3133 0TA7 注入(N+ +N+2) 4276 0.36注入(N+ +N+2)+C+ 4073 0.30從表1看出，離子注入后，試件的顯微硬度都有不同程度的提高，其中TC4鈦合金注入(N+ +N+2)混合束后硬度約提高1.4倍●TC4 熱膨脹系數(shù)：TC4鈦合金具有優(yōu)良的耐蝕性、小的密度、高的比強度及較好的韌性和焊接性等一系列優(yōu)點，在航空航天、石油化工、造船、汽車，醫(yī)藥等部門都得到成功的應(yīng)用?！馮C4鈦合金力學性能：抗拉強度σb/MPa≥895,規(guī)定殘余伸長應(yīng)力σr0.2/MPa≥825,伸長率δ5(%)≥10,斷面收縮率ψ(%)≥25●TC4鈦合金密度:4.5（g/cm3）工作溫度-100～550（℃）●TC4鈦合金化學成分:TC4含鈦(Ti) 余量,鐵(Fe)≤0.30,碳(C)≤0.10,氮(N)≤0.05,氫(H)≤0.015,氧(O)≤0.20,鋁(Al)5.5～6.8,釩(V)3.5～4.5。
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