采用Ti-Zr-Cu-Ni-Fe-Co-Mo作為釬料,在釬焊溫度1090～1170℃、釬焊時(shí)間0～20 min的工藝參數(shù)下,實(shí)現(xiàn)γ-TiAl和GH536合金的釬焊連接,利用SEM、EDS、XRD和萬(wàn)能試驗(yàn)機(jī)研究釬焊溫度和釬焊時(shí)間對(duì)釬焊接頭顯微組織和剪切強(qiáng)度的影響。結(jié)果表明:不同工藝參數(shù)下獲得的γ-TiAl/GH536釬焊接頭均包括4個(gè)界面反應(yīng)層。隨著釬焊溫度的升高和釬焊時(shí)間的延長(zhǎng),釬縫寬度和釬焊接頭的平均抗剪強(qiáng)度均是先增大后減小。釬焊溫度1150℃、釬焊時(shí)間10 min時(shí)獲得的釬焊接頭的剪切強(qiáng)度最大,達(dá)262 MPa。Al₃NiTi₂和TiNi₃脆性金屬間化合物是產(chǎn)生裂紋和降低接頭強(qiáng)度的主控因素,Al₃NiTi₂脆性金屬間化合物幾乎占據(jù)整個(gè)呈典型解理斷裂特征的剪切斷口表面。 

【文章來(lái)源】：Transactions of Nonferrous Metals Society of China. 2020,30(08)EISCICSCD

【文章頁(yè)數(shù)】：13 頁(yè)

【文章目錄】：
1 Introduction
2 Experimental
3 Results and discussion
    3.1 Microstructure of Ti-Zr-Cu-Ni-Fe-Co-Mo filler alloy
    3.2 Typical interfacial microstructure ofγ-TiAl/GH536 brazed joint
    3.3 Effects of brazing temperature and brazing time on microstructure ofγ-TiAl/GH536 brazed joints
    3.4 Shear strength and fracture mechanism ofγ-TiAl/GH536 brazed joints
4 Conclusions



本文編號(hào)：3152923