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金屬粉末爆炸燒結(jié)中微碰撞焊接引起的沉能研究
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TF124.36

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National Natural Science Foundation of China （10172025）


Research of Energy Deposition Caused by Micro-Explosive Welding in Explosive Consolidation of Metal Powders
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    摘要:

    以不可壓縮理想流體對(duì)稱碰撞模型對(duì)金屬粉末爆炸燒結(jié)中由微爆炸焊接引起的顆粒界面附近沉積的能量進(jìn)行了分析,在考慮熱傳導(dǎo)效應(yīng)的基礎(chǔ)上推導(dǎo)出了焊接流場中二維形式的能量方程并用有限差分法對(duì)其進(jìn)行了求解,在考慮沖擊絕熱壓縮貢獻(xiàn)的基礎(chǔ)上計(jì)算出了焊接流場中的溫度分布.結(jié)果表明：在適當(dāng)?shù)臎_擊壓力下,爆炸粉末燒結(jié)過程中微爆炸焊接引起的焊接界面附近的溫升將達(dá)到材料的熔點(diǎn)而引起材料熔化,顆粒熔化部分僅為其表面很薄的一層;爆炸焊接引起的材料溫升隨來流速度和碰撞角度的增大而升高.

    Abstract:

    Energy deposition at the interface of the particles caused by micro-explosive welding in explosive consolidation of metal powders is analyzed by symmetrical impaction model of uncompressible liquid. Two-dimensional equation of energy in the flow field of explosive welding is deduced and solved by finite difference method. Then the distribution of the temperature in the flow field is calculated on the basis of considering the adiabatic compression. The results show that under an appropriate pressure the temperature rise near the welding interface caused by micro-explosive welding in explosive consolidation of metal powders will be higher than the melting point of the materials, and the thin melted layers are localized on the surfaces of the particles, the temperature rise increases with increasing of approaching flow velocity and impact angle.

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王金相 李曉杰 閆鴻浩 曲艷東.金屬粉末爆炸燒結(jié)中微碰撞焊接引起的沉能研究[J].稀有金屬材料與工程,2006,35(7):1039~1044.[Wang Jinxiang, Li Xiaojie, Yan Honghao, Qu Yandong. Research of Energy Deposition Caused by Micro-Explosive Welding in Explosive Consolidation of Metal Powders[J]. Rare Metal Materials and Engineering,2006,35(7):1039~1044.]
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  • 收稿日期:2005-04-24
  • 最后修改日期:2005-04-24
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