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鉑銥合金與316L不銹鋼微激光點焊氣孔形成機理
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先進(jìn)焊接與連接國家重點實驗室開放課題研究基金(AWJ-M13-09)


Porosity Formation Mechanism in Laser Spot Microwelding of Pt-Ir Alloy and 316L Stainless Steel Wires
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    摘要:

    通過研究鉑銥合金與316L不銹鋼絲材微激光點焊接頭的表面形貌、接頭斷口中氣孔的形態(tài)以及橫截面中氣孔的分布情況,對接頭氣孔的形成機理進(jìn)行了分析。結(jié)果表明:不銹鋼合金元素在焊接熔池區(qū)擇優(yōu)氣化引起氣孔;鉑銥合金熔池的高溫使得不銹鋼合金元素在熔池中的溶解度降低,鉑銥合金的高導(dǎo)熱性及微激光焊接的特點使得熔池的凝固速度加快,從而形成氣孔

    Abstract:

    The porosity formation mechanism of the laser spot microwelded joints between Pt-Ir alloy and 316L stainless steel wires was investigated by characterizing the weld geometry, morphology and distribution of porosity in cross sections. The porosity is believed to be a result of preferential vaporization of stainless steel alloying elements spread into weld pool. Porosity is also attributed to low solubility of stainless steel alloying elements in weld pool due to its high temperature. In addition, the solidification process is speeded up by high heat conductivity of Pt-Ir alloy as well as characteristics of laser microwelding, and the porosity is formed

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黃永德,何 鵬,林鐵松,馮吉才,Y. Norman Zhou.鉑銥合金與316L不銹鋼微激光點焊氣孔形成機理[J].稀有金屬材料與工程,2013,42(10):2079~2082.[Huang Yongde, He Peng, Lin Tiesong, Feng Jicai, Y. Norman Zhou. Porosity Formation Mechanism in Laser Spot Microwelding of Pt-Ir Alloy and 316L Stainless Steel Wires[J]. Rare Metal Materials and Engineering,2013,42(10):2079~2082.]
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  • 收稿日期:2012-09-01
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