2-Ti3Al/α2+τ3/τ3-Al1+x-yTi1+yNi1-x/τ3+α-Cr/(Ni, Cr)ss/GH3039。"/>

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TiAl合金與GH3039摩擦焊接界面組織
作者:
作者單位:

1.西北工業(yè)大學(xué) 航空發(fā)動機高性能制造工業(yè)和信息化部重點實驗室，陜西 西安 710072;2.平?jīng)雎殬I(yè)技術(shù)學(xué)院 機電工程系，甘肅 平?jīng)?744000

作者簡介:

通訊作者:

中圖分類號:

TG456.9

基金項目:

國家自然科學(xué)基金項目（面上項目，重點項目，重大項目）


Intermediate Phases of TiAl/GH3039 Friction Welding Joint
Author:
Affiliation:

1.Key Laboratory of High Performance Manufacturing for Aero Engine, Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an 710072, China;2.Department of Mechanical and Electrical Engineering, Pingliang Vocational and Technical College, Pingliang 744000, China

Fund Project:

National Natural Science Foundation of China (51675434)

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    摘要:

    使用GH3039合金作為γ-TiAl與碳鋼摩擦焊接的過渡第三體，采用掃描電子顯微鏡（SEM）和透射電子顯微鏡（TEM）分析了TiAl/GH3039摩擦焊接接頭的界面結(jié)構(gòu)。結(jié)果表明，γ-TiAl和GH3039摩擦焊接接頭的最大抗拉伸強度能達(dá)到400 MPa以上。GH3039一側(cè)熱力影響區(qū)的塑性變形大于TiAl一側(cè)，并且在兩側(cè)均發(fā)生動態(tài)再結(jié)晶。接近GH3039母材相層中的Ni含量幾乎不變，接近TiAl母材相層中的Ti含量也幾乎不變。在GH3039側(cè)面附近的焊接區(qū)中，富Ni和富Cr晶粒的分布是互補的。Ti和Al容易溶于富Ni的晶粒中，而Mn容易溶于富Cr的晶粒中。在結(jié)合區(qū)中形成的大量富Cr晶粒是體心立方結(jié)構(gòu)的α-Cr。γ-TiAl和GH3039摩擦焊接的典型界面結(jié)構(gòu)為：γ-TiAl+α2-Ti3Al/α2+τ3/τ3-Al1+x-yTi1+yNi1-x/τ3+α-Cr/(Ni, Cr)ss/GH3039。

    Abstract:

    GH3039 superalloy was used as the third body metal to weld γ-TiAl with carbon steel, and the interface structure of the TiAl/GH3039 friction welding joint was analyzed by scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that the maximum tensile strength of the weld joint is more than 400 MPa after friction welding of γ-TiAl and GH3039 alloys. The plastic deformation of thermo-mechanically affected zone (TMAZ) on GH3039 side is larger than that on TiAl side, and dynamic recrystallization occurs on both sides. The Ni and Ti contents in the phase layer close to GH3039 and TiAl alloys hardly change, respectively. In the welding zone near GH3039 side, the distribution of Ni-rich and Cr-rich grains are complementary. Ti and Al are easily soluble in the Ni-rich crystal grains, and Mn is easily soluble in the Cr-rich crystal grains. A large number of Cr-rich grains formed in the bonding zone have body-centered cubic structure of α-Cr. The interface microstructure of the friction welding zone between γ-TiAl and GH3039 alloys is γ-TiAl+α2-Ti3Al/α2+τ3/τ3-Al1+x-yTi1+yNi1-x/τ3+α-Cr/(Ni, Cr)ss/GH3039.

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引用本文

杜隨更,李娜,王松林.TiAl合金與GH3039摩擦焊接界面組織[J].稀有金屬材料與工程,2021,50(9):3102~3109.[Du Suigeng, Li Na, Wang Songlin. Intermediate Phases of TiAl/GH3039 Friction Welding Joint[J]. Rare Metal Materials and Engineering,2021,50(9):3102~3109.]
DOI：10.12442/j. issn.1002-185X.20200583

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  • 收稿日期:2020-08-07
  • 最后修改日期:2020-09-15
  • 錄用日期:2020-09-21
  • 在線發(fā)布日期: 2021-09-26
  • 出版日期: 2021-09-24