Pengaruh Komposisi Paduan Al-Si Terhadap Kerentanan Hot Tearing
Abstract: Hot tearing and hot
cracking is a metal alloy casting product defects caused by several factors
such as alloy composition, casting temperature, mold temperature, mold shape
and even casting system itself. The study has been developed to find the
phenomenon of the hot tearing by varying the alloy composition, techniques and
methods. Increasing Si alloy composition can improve hot-tear, mold
modification CRCM (constrained Rod Casting Modified) Horizontal method can be
used to analyze the hot tearing. The material used is aluminum with Si
composition is 0.24pwt as base and material ADC12 as additive with Si
composition is 10.56pwt to increase Si composition. Hot-tearing sensitibility
value obtained by using the equation then showing into the chart HTS footprint.
HTS values for Si alloy with a composition of 0.24pwt is 12 and the HTS value
for alloys with compositions 1.05pwt Si is 18. Cracks formed in the product
starting with the smooth (hairline cracks) category to the complete (specimen
broken) category. The higher Si content can increase the cracked in product
castings, so that the higher Si composition more tendency to tear.
Penulis: Akhyar, Suyitno
Kode Jurnal: jptmesindd120117
