Announcement for Downloading full text filePlease respect the Copyright Act.
All digital full text dissertation and theses from this website are authorized the copyright owners. These copyrighted full-text dissertation and theses can be only used for academic, research and non-commercial purposes. Users of this website can search, read, and print for personal usage. In respect of the Copyright Act of the Republic of China, please do not reproduce, distribute, change, or edit the content of these dissertations and theses without any permission. Please do not create any work based upon a pre-existing work by reproduction, Adaptation, Distribution or other means.
URN etd-0820107-145133 Statistics This thesis had been viewed 4683 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