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URN etd-0820107-145133 Statistics This thesis had been viewed 4734 times. Download 1646 times. Author Chia-Pao Huang Author's Email Address No Public. Department Materials Engineering Year 2006 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 91 Title Effect of Filler Metals on the Microstructure and Property of WC-Co /Carbon Steel Brazed Joints Keyword vacuum brazing Cemented Tungsten Carbide Cemented Tungsten Carbide vacuum brazing Abstract 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. Advisor Committee Liu-Ho Chiu - advisor
Files Date of Defense 2007-07-19 Date of Submission 2007-08-20