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鎢基合金增塑粉末擠壓成形新技術(shù)
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國家自然科學基金 (50774098)；國防基礎(chǔ)科研資助項目


Novel Technology for Plasticizing Powder Extrusion Molding of Tungsten Heavy Alloy
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    摘要:

    采用增塑粉末擠壓成形新技術(shù)，開發(fā)了幾種適合鎢基合金擠壓成形用粘結(jié)劑，研究幾種配方粘結(jié)劑的相容性及擠壓、脫脂特性。通過熱力學計算和熱分析，以及掃描電鏡和偏光顯微鏡觀察，發(fā)現(xiàn)粘結(jié)劑各組元分子間具有較好的相容性。通過優(yōu)化喂料制備、擠壓工藝，分別在60和75 ℃制備出直徑達24 mm的大長徑比鎢基合金棒材。綜合采用溶劑-熱兩步脫脂工藝，實現(xiàn)Ф24 mm擠壓棒坯的快速無缺陷脫脂

    Abstract:

    Adopting a novel technology for plasticizing powder extrusion molding (PEM), some types of novel binder for PEM of tungsten heavy alloy has been developed, and the compatibility, extruding and debinding characteristics of the binders have been studied. The thermodynamic calculation and thermal analysis, and the observation of SEM and polarization microscope were used to certify binder ingredient compatibility. The large aspect ratio tungsten alloy bars with diameters up to 24 mm have used manufactured at 60 ℃ and 75 ℃ respectively by optimizing the preparation technology of feedstock and extrusion process. By adopting the solvent-thermal debinding method the fast extruded bars with 24 mm in diameter and without defect debinding have been obtained

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劉文勝,蔡青山,馬運柱.鎢基合金增塑粉末擠壓成形新技術(shù)[J].稀有金屬材料與工程,2012,41(8):1495~1499.[Liu Wensheng, Cai Qingshan, Ma Yunzhu. Novel Technology for Plasticizing Powder Extrusion Molding of Tungsten Heavy Alloy[J]. Rare Metal Materials and Engineering,2012,41(8):1495~1499.]
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  • 收稿日期:2011-08-06
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