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鎂合金攪拌摩擦焊接技術(shù)
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TG457.14 U671.8

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國家自然科學(xué)基金資助項(xiàng)目（50275123）


Technique of Magnesium Alloy Friction Stir Welding
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    摘要:

    對5mm厚鎂合金AZ31B板材的摩擦焊接技術(shù)進(jìn)行了試驗(yàn)研究，結(jié)果表明：適合其板材的攪拌摩擦焊接的攪拌頭，材料為W6MoSCr4V2高速鋼，結(jié)構(gòu)為凹面圓臺(tái)形，根部直徑5．5mm，端部直徑為2．5mm，軸肩尺寸為12mm，長度為4．7mm。鎂合金攪拌摩擦焊接頭的抗拉強(qiáng)度可達(dá)母材的90％，延伸率可達(dá)母材的50％。攪拌摩擦焊接頭焊合區(qū)為動(dòng)態(tài)再結(jié)晶組織，在接頭前進(jìn)邊焊合區(qū)與母材有明顯的分界線，返回邊過渡區(qū)有金屬微熔的跡象。

    Abstract:

    The experimentation and research of AZ31B magnesium alloy friction stir welding were carried out by using plates of 5 mm in thickness.The results showed that the material suitable for the stir welding head was W6Mo5Cr4V2 high-speed steel.Its structure was in shape of concave round platform,the root of which was 5.5 mm in diameter,the butt 2.5 mm,the shoulder 12 mm,and its length was 4.7 mm.The tensile strength of magnesium alloy friction stir welding joint could be 90% of that of the parent metal,and the specific elongation could be 50% of that of the parent metal.The structure of the weld area was dynamic recrystallization.Apparent boundary existed between the weld area of the forward border joint and the parent metal,while trails of little molten showed in the transitional area of the back border.

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.鎂合金攪拌摩擦焊接技術(shù)[J].鈦工業(yè)進(jìn)展,2006,23(1):28-31.

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  • 收稿日期:2005-08-30
  • 最后修改日期:2005-08-30
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