最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級(jí)檢索
電子束偏轉(zhuǎn)掃描對(duì)TC18鈦合金組織、硬度和作用深度的影響
DOI:
作者:
作者單位:

北京航空航天大學(xué)機(jī)械工程及自動(dòng)化學(xué)院,北京航空航天大學(xué)機(jī)械工程及自動(dòng)化學(xué)院,北京航空航天大學(xué)機(jī)械工程及自動(dòng)化學(xué)院,北京航空制造工程研究所,北京航空航天大學(xué)機(jī)械工程及自動(dòng)化學(xué)院

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

TG178

基金項(xiàng)目:

航空科學(xué)基金項(xiàng)目(2014ZE51057)


Effects of Deflection Scanning of Electron Beam on Microstructure, Hardness and Treated Depth of TC18 Titanium Alloy
Author:
Affiliation:

School of Mechanical Engineering and Automation,Beihang University,School of Mechanical Engineering and Automation,Beihang University,School of Mechanical Engineering and Automation, Beihang University,Science and Technology on Power Beam Processes Laboratory,Beijing Aeronautical Manufacturing Technology Research Institute,School of Mechanical Engineering and Automation,Beihang University

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問(wèn)統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    為了形成均勻的表面硬化層,采用逐行、無(wú)搭接的電子束高頻偏轉(zhuǎn)掃描技術(shù)(DSEB)對(duì) TC18 鈦合金的表面進(jìn)行處理。重點(diǎn)研究了電子束束流、聚焦電流和處理次數(shù)等關(guān)鍵參數(shù)對(duì)TC18組織、表面硬度和處理深度的影響。處理的試樣通過(guò)電鏡掃描(SEM)、光鏡和維氏硬度計(jì)進(jìn)行檢測(cè)。經(jīng) DSEB 處理后,TC18 鈦合金表面形成了主要由針狀馬氏體組成的表面硬化層,表面硬度得到提高；硬化區(qū)的金相組織均勻,在掃描束斑相鄰區(qū)域沒(méi)有明顯的過(guò)渡；硬化層深度均勻,可達(dá)200 μm以上。試驗(yàn)結(jié)果表明 DSEB 有望成為大面積、復(fù)雜形狀的鈦合金構(gòu)件的表面處理新方法。

    Abstract:

    In this study, the high frequency deflection scanning of vacuum electron beam technology (DSEB) with line by line scanning mode and no overlap was employed to treat with the surface of TC18 titanium alloy, for obtaining a homogeneous hardened surface layer. The purpose of this work was to investigate the effects of critical process parameters, including beam current, focus current and treatment times, on the microstructure, hardness and treated depth of the treatment area. The treated specimens were characterized by using SEM, Optical Microscope, and Vickers hardness tester. After treated by DSEB, the hardened surface layer is formed, which is mainly consisted of the acicular martensite, and the surface hardness of the treatment area is improved. Moreover, the microstructure of the hardened zone is homogeneous and has no obvious transition at the contact parts of two adjacent electron beams scanning. The depth of the hardened zone can be more than 200 μm and basically constant. These results show that DSEB is a very promising technological solution for the surface heat treatment of titanium alloy of large area and complex components.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

張偉,祁澤武,彭鵬,許海鷹,齊鉑金.電子束偏轉(zhuǎn)掃描對(duì)TC18鈦合金組織、硬度和作用深度的影響[J].稀有金屬材料與工程,2017,46(12):3651~3657.[Zhang Wei, Qi Zewu, Peng Peng, Xu Haiying, Qi Bojin. Effects of Deflection Scanning of Electron Beam on Microstructure, Hardness and Treated Depth of TC18 Titanium Alloy[J]. Rare Metal Materials and Engineering,2017,46(12):3651~3657.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2016-01-14
  • 最后修改日期:2016-05-30
  • 錄用日期:2016-07-15
  • 在線發(fā)布日期: 2018-01-04
  • 出版日期: