Abstract
Different surface treatment methods of steel inserts, including aluminizing, coating surface modifier as well as a combination of coating surface modifier and aluminizing (surface modifier+aluminizing), were introduced into the fabrication of carbon steel and ZL114A aluminum bimetallic castings during compound casting process. The aluminizing method slightly improved the bonding of the bimetallic casting compared with untreated method, and a gap at the interface was observed, leading to a poor bonding. In the case of the coating surface modifier method, the integrity of the interface was greatly increased because of the improvement of the incompatible between steel and aluminum, which indicated a mechanical bonding without a reaction layer, resulting in a limited improvement of the bonding. While the surface modifier+aluminizing method promoted a sound interface together with a metallurgical bonding, and a reaction layer with an irregular tongue-like morphology and an average thickness of approximately 30μm was formed, which mainly consisted of Fe2Al5, FeAl3, Al8Fe2Si, and Al2Fe3Si3 intermetallic compounds, resulting in a significant improvement of the bonding.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
