【摘要】：對(duì)Ti-6Al-4V鈦合金真空離子滲氮層的表面完整性進(jìn)行測(cè)試。分析了滲氮溫度、時(shí)間等工藝參數(shù)對(duì)滲層表面粗糙度、殘余應(yīng)力等的影響規(guī)律和機(jī)制。研究表明,在650~900℃范圍內(nèi),隨著滲氮溫度的升高和滲氮時(shí)間的增加,表面粗糙度總體呈現(xiàn)增加的趨勢(shì)。其中,滲氮溫度從700℃增加到750℃,滲氮層表面粗糙度大幅增加,殘余應(yīng)力轉(zhuǎn)變?yōu)闅堄鄩簯?yīng)力,且應(yīng)力絕對(duì)值顯著增加。證明鈦合金反應(yīng)擴(kuò)散滲氮機(jī)制啟動(dòng)溫度在700~750℃范圍內(nèi),從而,鈦合金離子滲氮適合的溫度應(yīng)大于750℃。同時(shí)表明,鈦合金滲氮層表面完整性與反應(yīng)擴(kuò)散滲氮行為密切相關(guān)。在滲氮溫度不高于850℃,滲氮時(shí)間不超過16 h的條件下,因滲氮引起的表面粗糙度增加不超過0.3μm,滲層表面殘余壓應(yīng)力可達(dá)-500 MPa。
[Abstract]:The surface integrity of vacuum ion nitriding layer of Ti-6Al-4V titanium alloy was tested. The influence and mechanism of nitriding temperature and time on surface roughness and residual stress of nitriding layer were analyzed. The results show that the surface roughness increases with the increase of nitriding temperature and nitriding time in the range of 650 鈩，

本文編號(hào)：2437900