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鋁合金雙絲VP-GTAW增材構(gòu)件組織和性能
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北京航空航天大學(xué),北京航空航天大學(xué),北京航空航天大學(xué),北京航空航天大學(xué),北京航空航天大學(xué),Welding Engineering Centre, Cranfield University, UK

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TG47

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北京市科技計(jì)劃裝備制造專項(xiàng)資助項(xiàng)目，中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)


Microstructure and Properties of Double-Wires plus Arc Additive Manufactured Aluminium Alloy Deposits Using VP-GTAW Process
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    摘要:

    以Al-6.3Cu+Al-5Mg為填絲材料進(jìn)行鋁合金雙絲VP-GTAW增材制造試驗(yàn)。結(jié)果表明，采用雙絲VP-GTAW制備試樣可提高成形效率，且成形穩(wěn)定；通過(guò)調(diào)節(jié)兩種絲材的送絲速度可以獲得不同主要合金元素含量的Al-Cu-Mg合金，合金組織主要由柱狀晶和等軸枝晶組成，且呈非均勻分布特征，調(diào)節(jié)主要合金元素含量可實(shí)現(xiàn)對(duì)鋁合金試樣性能的控制。原始狀態(tài)下鋁合金試樣的顯微硬度為90-100HV，抗拉、屈服強(qiáng)度分別可達(dá)286MPa和183MPa，但塑性較差，僅為4.5%。

    Abstract:

    Double-wires plus arc additive manufacturing(D-WAAM) system for Al-Cu-Mg alloy using variable polarity gas tungsten arc welding(VP-GTAW) process was established. Al-6.3Cu and Al-5Mg wires were employed as filling metal, the microstructure and mechanical properties of as-deposited D-WAAM samples were analyzed. Experimental results show that the excellent deposits wall samples can be achieved and the deposition efficiency can be improved by using D-WAAM process. Al-Cu-Mg alloys with different element content of copper and magnesium were obtained by adjusting the two wire feed speed. The microstructures of Al-Cu-Mg deposits were mainly composed of columnar dendrite and equiaxed dentrite grains with the non-uniformly distribution characteristics. Mechanical properties can be enhanced due to the addition of alloying of element magnesium. The microhardness of as-deposited Al-Cu-Mg alloy was 90-100 HV. The UTS, YS and elongation of as-deposited D-WAAM alloy can be increased to 286 MPa, 183 MPa and 4.5%, respectively.

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孫紅葉,從保強(qiáng),祁澤武,齊鉑金,趙罡,丁佳洛.鋁合金雙絲VP-GTAW增材構(gòu)件組織和性能[J].稀有金屬材料與工程,2017,46(8):2203~2207.[sun hong ye, Cong Baoqiang, QiZewu, Qi Bojin, ZhaoGang, Ding JIaluo. Microstructure and Properties of Double-Wires plus Arc Additive Manufactured Aluminium Alloy Deposits Using VP-GTAW Process[J]. Rare Metal Materials and Engineering,2017,46(8):2203~2207.]
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  • 收稿日期:2016-07-15
  • 最后修改日期:2016-08-22
  • 錄用日期:2016-09-18
  • 在線發(fā)布日期: 2017-11-16
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