鋁鋼點(diǎn)焊鉚接復(fù)合連接技術(shù)
本文選題:點(diǎn)鉚焊 + 力學(xué)性能 ; 參考:《焊接學(xué)報》2017年02期
【摘要】:提出了一種點(diǎn)焊與鉚接復(fù)合進(jìn)行鋁鋼連接的技術(shù),即在待焊試樣區(qū)域預(yù)制工藝孔,將鉚釘鉚入孔中,利用鉚接力實(shí)現(xiàn)試樣的預(yù)連接.然后使用點(diǎn)焊機(jī)在鉚接位置進(jìn)行點(diǎn)焊,實(shí)現(xiàn)鉚接與點(diǎn)焊的復(fù)合連接,稱為"點(diǎn)鉚焊".文中分析了該方法的力學(xué)性能、微觀組織、斷裂模式,并同純點(diǎn)焊與純鉚接進(jìn)行了比較.結(jié)果表明,點(diǎn)鉚焊的抗拉強(qiáng)度比純點(diǎn)焊提高了23.8%,比純鉚接提高了28.7%,失效前吸收功比純點(diǎn)焊提高211%,比純鉚接提高67%.雖然在點(diǎn)鉚焊過程中也會產(chǎn)生脆性金屬間化合物,但這些區(qū)域并不是主要的承載部位,點(diǎn)鉚焊為塑性斷裂模式.
[Abstract]:In this paper, a technique of spot welding and riveting combined to connect aluminum steel is put forward, that is, rivets are riveted into the holes in the prefabricated process holes in the area of the specimens to be welded, and the riveting force is used to realize the pre-joining of the samples. Then spot welding machine is used in riveting position to realize the compound connection of riveting and spot welding, which is called "spot riveting welding". The mechanical properties, microstructure and fracture mode of the method are analyzed and compared with that of pure spot welding and pure riveting. The results show that the tensile strength of spot riveting is 23.8 higher than that of pure spot welding, 28.7% higher than that of pure riveting, 211.1% higher than that of pure spot welding before failure, 67% higher than that of pure riveting. Although brittle intermetallic compounds are also produced in the spot riveting process, these areas are not the main load-bearing sites, and the spot riveting is a plastic fracture mode.
【作者單位】: 天津大學(xué)材料科學(xué)與工程學(xué)院;天津大學(xué)天津市現(xiàn)代連接技術(shù)重點(diǎn)試驗(yàn)室;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(51275342,51405334) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金(20130032110004)
【分類號】:TG453.9
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