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基于鈮中間層的鈦與低碳鋼的電阻點焊
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河南科技大學(xué) 材料科學(xué)與工程學(xué)院

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國家自然科學(xué)基金(項目號U1204520)；河南省國際合作項目( 項目號182102410066) ; 河南省高?？萍紕?chuàng)新人才計劃基金( 項目號16HASTIT050)


Resistance Spot Welding between Titanium and Mild Steel with An Insert of Nb
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School of Materials Science and Engineering,Henan University of Science and Technology

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    摘要:

    以0.1 mm厚的鈮箔為中間層對鈦與低碳鋼Q235進(jìn)行了點焊,觀察了接頭熔核區(qū)域的顯微組織特征,探討了焊接電流對接頭熔核直徑和抗剪力的影響。試驗結(jié)果表明,焊接電流大于8 kA時中間層鈮在焊接中發(fā)生溶斷,接頭熔核區(qū)域組織主要由Fe-Ti金屬間化合物構(gòu)成；鈮不發(fā)生溶斷時接頭熔核區(qū)域組織主要由Fe-Nb化合物與固溶體組成。接頭抗剪力隨焊接電流的增大呈先增大后降低的變化趨勢,焊接電流為7 kA時接頭抗剪力最大,約為4.7 kN。

    Abstract:

    Titanium and mild steel sheets were welded by resistance spot welding with insert of 100 μm thick niobium foil. The interfacial microstructure characteristics were analyzed; the effects of welding on the nugget diameter and tensile shear load of joint were studied. The results reveal that the niobium foil disconnect during spot welding when the welding current is greater than 8 kA, the nugget is mainly composed of Fe-Ti intermetallic compounds in the case; and that the nugget is mainly composed of Fe-Nb compounds and some solid solution when the niobium foil do not disconnect during spot welding. The tensile shear load of joint increased and then decreased with the increase of welding current. A tensile shear load of a maximum of 4.7 kN was obtained at a welding current of 7 kA.

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邱然鋒,李青哲,趙洋洋,石紅信.基于鈮中間層的鈦與低碳鋼的電阻點焊[J].稀有金屬材料與工程,2019,48(10):3309~3314.[Qiu Ranfeng, Li Qingzhe, Zhao Yangyang, Shi Hongxin. Resistance Spot Welding between Titanium and Mild Steel with An Insert of Nb[J]. Rare Metal Materials and Engineering,2019,48(10):3309~3314.]
DOI：10.12442/j. issn.1002-185X.20180409

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  • 收稿日期:2018-04-22
  • 最后修改日期:2018-06-04
  • 錄用日期:2018-06-15
  • 在線發(fā)布日期: 2019-11-01
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