填料對碳化鎢與SAE 1045中碳鋼硬銲接合件 結構及特性之影響

Effect of Filler Metals on the Microstructure and Property of WC-Co /Carbon Steel Brazed Joints

黃家寶(Chia-Pao Huang)

指導教授 ： 邱六合

大同大學/工程學院/材料工程學系所/碩士(2007年)

摘要

本研究在含有真空的不同氣氛下針對耐磨性高的碳化鎢與SAE 1045中碳鋼的異質材料進行硬銲接合，採用的填料包含純銅箔、C52100青銅片、BAg-3銀焊料。本實驗銅基填料硬銲過程皆在真空環境下進行，以硬銲溫度、持溫時間為變化參數，進行硬銲接合的研究。實驗結果顯示WC-Co/Cu/SAE1045與WC-Co/C52100/SAE1045接合件在WC-Co/Cu界面生成Fe-Co-Cu層狀合金相，且Fe-Co-Cu層狀合金相隨溫度與時間增加而成長，當持溫時間越長，反應層持續成長將兩母材連結一起。當硬銲條件為1140℃/15min的WC-Co/Cu/SAE1045接合件有最大剪切強度320MPa。硬銲條件為1100℃/5min的WC-Co/C52100/SAE1045接合件有最大剪切強度363MPa。銀基硬銲填料BAg-3則改變硬銲溫度並以固定持溫時間10min在Ar+10％H2與Ar氣氛進行硬銲。WC-Co/BAg-3/SAE1045顯示在Ar+10％H2氣氛硬銲填料對基材的潤濕性比在Ar氣氛環境佳。WC-Co /BAg-3/SAE1045接合件，在Ar+10％H2氣氛硬銲溫度為950℃持溫10min時有最大剪切強度91MPa。

關鍵字

碳化鎢 ； 真空硬銲

並列摘要

Cemented Tungsten Carbide (WC-Co) and carbon steel (SAE 1045) were brazed in a vacuum condition and protective atmosphere. Copper foil, C52100 foil, and BAg-3 brazing filler were used in this study. Copper-base fillers were used in vacuum brazing of WC-Co and SAE 1045. The results showed that using copper and C52100 brazing were formed Fe-Co-Cu alloy layer at WC-Co/Cu interface. The growth of Fe-Co-Cu alloy layer was affected by brazing temperature and time. The Fe-Co-Cu alloy layer grows increasingly from WC-Co surface with increasing brazing time. It finally reaches the carbon steel so that both base metals link. The maximum shear strength of WC-Co/Cu/SAE 1045 joint brazed at 1140℃ for 15 min was 320MPa. The maximum shear strength of WC-Co/C52100/SAE 1045 joint brazed at 1100℃ for 5 min was 363MPa. The BAg-3 filler was brazed at different temperatures for 10 min brazing time under Ar+10％H2 and Ar atmosphere. The results showed that the shear strength of brazed jointed in Ar+10％H2 atmosphere are higher than those in Ar atmosphere. The maximum shear strength of WC-Co/BAg-3/SAE 1045 was 91MPa under 950℃for 15 min in Ar+10％H2 atmosphere.

並列關鍵字

Cemented Tungsten Carbide ； vacuum brazing

參考文獻

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