助銲劑輔助惰氣鎢極電弧銲接對鎂合金熱裂敏感性之研究

Study on Hot cracking Susceptibility in Flux-Assisted Gas Tungsten Arc Welding of Magnesium Alloy

謝秉謙(Ping-Chien Hsieh)

指導教授 ： 黃和悅

國立虎尾科技大學/工程學院/材料科學與綠色能源工程研究所在職專班/碩士(2014年)

https://doi.org/10.6827/NFU.2014.00281

摘要

本論文之目的主要在探討活性助銲劑對鎂合金AZ31焊道熔深與銲接熱裂縫之影響。
本實驗採用AZ31鎂合金作為試驗材料，選用氧化物B2O3、CeO2、Cr2O3、La2O3、MnO2、TiO2作為使用活性助銲劑材料，以直流正接A-TIG銲進行試片的表面點銲。分析助銲劑及其焊接方法對銲縫熔深、熔寬、熱裂和組織的影響。
結果發現，塗覆任一種助銲劑均可明顯地提高AZ31鎂合金TIG銲縫熔深和深寬比。就熱裂角度而言，其測量結果指出：塗覆CeO2與Cr2O3於AZ31鎂合金的熱裂敏感性優於其他助銲劑。

關鍵字

鎂合金 ； A-Tig銲 ； 助銲劑 ； 熱裂

並列摘要

The purpose of this study was to investigate the effect of activating fluxes to the welding penetration and hot cracking of AZ31 magnesium alloys.
Using AZ31 magnesium alloy as experiment material, using oxide (B2O3,CeO2,Cr2O3,La2O3,MnO2,Tio2) as activating flux, welding the specimen by straight polarity direct current A-TIG welding method. The effect of activating flux and welding method on the penetration, width, hot cracking and tissue of weld is analyzed.
The results showed that any of the activating flux improved the weld penetration and the depth/width (D/W) ratio of the TIG welded AZ31 magnesium alloy joints obviously. Speaking of the hot cracking, the survey result pointed out：the hot cracking susceptibility of AZ31 with painting CeO2,Cr2O3 is better then with any pating fluxes of AZ31.

並列關鍵字

Magnesium alloy ； A-TIG welding ； Flux ； Hot cracking

參考文獻

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