Specimens of Ti6A14V alloy were implanted with nitrogen ions of 4× 1018 cm-2 at temperatures from 100 to 600℃. Auger Electron Spectroscopy (AES), microhardness measurements and pin-on-disk wear testing, Scanning...Specimens of Ti6A14V alloy were implanted with nitrogen ions of 4× 1018 cm-2 at temperatures from 100 to 600℃. Auger Electron Spectroscopy (AES), microhardness measurements and pin-on-disk wear testing, Scanning Electron Mi- croscopy (SEM), and Glancing angle X-ray Diffraction. (XRD) were utilized to evaluate the surface property improvements. The thickness of implanted layers increased by about an order of magnitude when the temperature was elevated from 100 to 6000℃. Higher surface hardness and wear resistance were also obtained in the high tempera-ture implantation. The XRD image showed the presence of nitrides of titanium at the implanted surface.展开更多
The grindability of alloy Ti6AI4V with zireonia alumina and silicon carbide flap wheels, and the effect of process parameters on grinding forces, grinding temperature and surface integrity are studied. The grinding fo...The grindability of alloy Ti6AI4V with zireonia alumina and silicon carbide flap wheels, and the effect of process parameters on grinding forces, grinding temperature and surface integrity are studied. The grinding forces are measured by KISTLER 9265B dynamometer. The grinding temperature response is obtained by NI USB-621X signal collection system. Ground surface morphology and the metallographic structure are observed by the Hirox KN-7700 stereoscopic microcope and the Quanta200 scanning electron microscope （SEM）. Surface roughnesses are measured by Mahr Perthometer M1 instrument. The surface microhardnesses are detected by HXS-1000 microhardness tester.展开更多
基金Supported by the Defense Science Foundation (No.98JS50.3.3 HZ5801)
文摘Specimens of Ti6A14V alloy were implanted with nitrogen ions of 4× 1018 cm-2 at temperatures from 100 to 600℃. Auger Electron Spectroscopy (AES), microhardness measurements and pin-on-disk wear testing, Scanning Electron Mi- croscopy (SEM), and Glancing angle X-ray Diffraction. (XRD) were utilized to evaluate the surface property improvements. The thickness of implanted layers increased by about an order of magnitude when the temperature was elevated from 100 to 6000℃. Higher surface hardness and wear resistance were also obtained in the high tempera-ture implantation. The XRD image showed the presence of nitrides of titanium at the implanted surface.
基金Supported by the Natural Science Foundation of Jiangsu Province (BK2006723)New Century Ex-cellent Talents in University from Ministry of Education of China (NCET-07-0435)~~
文摘The grindability of alloy Ti6AI4V with zireonia alumina and silicon carbide flap wheels, and the effect of process parameters on grinding forces, grinding temperature and surface integrity are studied. The grinding forces are measured by KISTLER 9265B dynamometer. The grinding temperature response is obtained by NI USB-621X signal collection system. Ground surface morphology and the metallographic structure are observed by the Hirox KN-7700 stereoscopic microcope and the Quanta200 scanning electron microscope （SEM）. Surface roughnesses are measured by Mahr Perthometer M1 instrument. The surface microhardnesses are detected by HXS-1000 microhardness tester.
文摘为消除冷坩埚连续成形钛合金铸棒表面缺陷,了解工艺参数对表面质量影响规律,并制备出无裂纹铸棒,通过正交试验和理论分析的方法,研究了不同工艺参数对表面质量的影响.研究表明:表面质量随功率和线圈匝数的增加而变坏,随抽拉速度和拉锭高度的增加先变好后变坏;各参数影响程度不同,线圈匝数影响最大,功率次之,抽拉速度再次,拉锭高度影响最小;铸造表面质量良好钛合金棒的工艺参数为:抽拉速度5 mm/min,功率50 kw,线圈3匝,拉锭高度30 mm.
