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

+高級檢索
SPS循環(huán)熱處理對93W-4.9Ni-2.1Fe合金組織和性能的影響
DOI:
作者:
作者單位:

華南理工大學 國家金屬材料近凈成形工程技術研究中心,華南理工大學 國家金屬材料近凈成形工程技術研究中心,華南理工大學 國家金屬材料近凈成形工程技術研究中心,華南理工大學 國家金屬材料近凈成形工程技術研究中心,華南理工大學 國家金屬材料近凈成形工程技術研究中心

作者簡介:

通訊作者:

中圖分類號:

TF124

基金項目:

總裝基金資助項目(9140A18070114JW16001),國家自然科學基金資助項目(51504100),中央高?；究蒲袠I(yè)務費培育項目(2015ZP029),廣東省自然科學基金資助項目(2015A030310170)


Effect of SPS Cyclic Heat-Treatment on the Microstructure and Properties of 93W-4.9Ni-2.1Fe Alloy
Author:
Affiliation:

National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻
    • |
  • 相似文獻
    • |
  • 引證文獻
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    本文基于放電等離子燒結(SPS)技術對燒結態(tài)的93W-4.9Ni-2.1Fe高密度鎢合金進行真空循環(huán)熱處理,并通過光學顯微鏡、SEM、EDS和三點彎曲實驗分析循環(huán)熱處理對合金的顯微組織、成分和力學性能的影響規(guī)律。結果表明,隨著循環(huán)次數(shù)的不斷增加,粘結相滲入W-W晶粒界面不斷增多,W-W連接度和二面角不斷降低,顯微硬度和晶粒尺寸變化較小,粘結相則因W含量的增加得到了固溶強化。合金的抗彎強度在循環(huán)2次后明顯提高,當循環(huán)次數(shù)增加到20次后,合金的平均抗彎強度達到2321 MPa,相比液相燒結后淬火處理的合金提高了約160 MPa,因此SPS循環(huán)熱處理可以明顯改善93W-4.9Ni-2.1Fe高密度鎢合金的組織和力學性能。

    Abstract:

    The effect of vacuum cyclic heat-treatment based on spark plasma sintering (SPS) technique on the microstructure, composition and properties of as-sintered 93W-4.9Ni-2.1Fe tungsten heavy alloy has been studied by optical microscope, SEM, EDS and three-point bending tests. The results show that the matrix penetration into W-W grain boundaries enhances significantly, and the W-W contiguity and dihedral angle decrease gradually with the cycle index increasing. SPS cyclic heat-treatment does not obviously change the micro-hardness and grain size. The matrix is strengthened by the increasing content of tungsten owing to the treatment. The bending strength of the alloy increases significantly after 2 cycles. When the cycles goes up to 20, the average bending strength reaches 2321MPa, which is 160MPa higher than that of the conventional liquid-sintered and solution-treated 93W-4.9Ni-2.1Fe alloy. The microstructure and properties of 93W-4.9Ni-2.1Fe tungsten heavy alloy can be improved apparently by SPS cyclic heat-treatment.

    參考文獻
    相似文獻
    引證文獻
引用本文

關模,李小強,胡可,楊帆,朱德智. SPS循環(huán)熱處理對93W-4.9Ni-2.1Fe合金組織和性能的影響[J].稀有金屬材料與工程,2018,47(7):2210~2215.[Guan Mo, Li Xiaoqiang, Hu Ke, Yang Fan, Zhu Dezhi. Effect of SPS Cyclic Heat-Treatment on the Microstructure and Properties of 93W-4.9Ni-2.1Fe Alloy[J]. Rare Metal Materials and Engineering,2018,47(7):2210~2215.]
DOI：[doi]

復制
文章指標
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2016-07-15
  • 最后修改日期:2016-09-30
  • 錄用日期:2016-11-10
  • 在線發(fā)布日期: 2018-10-10
  • 出版日期: