Abstract
In order to reveal the effect of vibration solidification on microstructure and properties of gray cast iron in lost foam casting, Y-shaped HT100 gray cast iron was prepared by vibration lost foam casting, and the effect of amplitude on the microstructure and properties of gray cast iron was studied. The results showed that, with the increase in amplitude, the short and thin A-type flake graphite increases, and the austenite structure transforms from columnar to cellular. The hardness, tensile strength, and elongation of gray cast iron first increase and then decrease with the increase in amplitude. The appropriate amplitude in the process of Y-shaped HT100 gray cast iron by lost foam casting is 2 mm, while the tensile strength and elongation of gray cast iron are the highest, with the values of 147.51 MPa and 1.17%, respectively. The change of mechanical properties of gray cast iron is mainly determined by the morphology and distribution of austenite in gray cast iron and A-type flake graphite.
Highlights
Casting is an important forming method of parts or blanks, especially suitable for the production of complex shape parts, which is favored by production enterprises [1]
Lost foam casting (LFC) is a near net forming method, which is suitable for the manufacture of castings with complex shape
Due to the introduction of foam mold in lost foam casting process, the casting temperature is too high, and at the same time, the lost foam casting adopts dry sand molding, which makes the cooling rate of the casting lower [7, 8]. erefore, the gray cast iron has the problems of coarse primary structure and low mechanical properties
Summary
Casting is an important forming method of parts or blanks, especially suitable for the production of complex shape parts, which is favored by production enterprises [1]. The casting or blanks produced by casting have defects such as shrinkage cavity, shrinkage porosity, and coarse structure, which lead to poor performance [2] In view of these problems, casting researchers and production personnel have carried out a lot of research work, aiming at refining the casting or blank structure and improving its mechanical properties [3]. Lost foam casting (LFC) is a near net forming method, which is suitable for the manufacture of castings with complex shape It can be used for the production of engine box, machine bed, and other castings made of gray cast iron. In order to reveal the effect of vibration solidification on the microstructure and properties of gray cast iron in lost foam casting, Y-shaped test blocks of HT100 were formed by mechanical vibration with different amplitudes in the process of LFC
Sign-in/Register to view highlights & summary 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.
