Pengaruh Bahan Pengikat Cetakan Pasir terhadap Sifat Fisis dan Mekanis Besi Tuang Kelabu

Hd, Dkk, Noor Setyo
Journal article Jurnal Penelitian Inovasi • Desember 2013

Abstrak

This research aims to study the effect of the sand mold material physical and mechanical properties of gray cast iron castings. Mold made €‹€‹using silica sand, using a variation of each binder is bentonite molding, resin, and cement SiO2Na2O with the percentage of each sequentially 5 % , 6 %, 7 % , 4 % of the weight of the sand. Obtained by casting, molten metal pouring from induction furnace at a temperature of 12500C castings, cavity into print, then allowed to cool. Physical and mechanical properties of castings that will be studied include tensile strength, hardness, content of the composition and microstructure. Molten metal is obtained from the induction furnace temperature 12500C cast , has a composition of 91.95 % Fe, 4.726 % C, 2.074 5si , 1.076 % Mn, 0.183 % P and > 0.354 % S, mold using 60 mesh silica sand material, moisture content below 10 % , making use of the machine shake urged , in order to obtain large density mold bentonite binder, resin , CO2 and cement kg/mm3 respectively 2.23, 1.93 kg/mm3 , kg/mm3 1.81; 1,78 kg/mm3 Microstructural observations carried out using optical mokroskop, composition testing using spectrometers Polyvac 2000 Optical emisson Hilger Analytical , with a tensile strength testing machine tensile load of 3,000 kg Gotech on, while the hardness test is done by using a method Brinnell load testing machine Hardness Tester 3000 gr . Pengaruh Bahan Pengikat Cetakan Pasir Terhadap Sifat Fisis €¦€¦ (Noor Setyo, Sri Widodo)The results showed , respectively castings violence has increased with the decrease in the density of the mold. Instead tensile strength will decrease . Sequentially great surface hardness to mold the sand with bentonite binder, CO2, cement and resin obtained great violence 220€‹; 225; 245; tensile strength of 266 kg/mm2 and 33 ;32 ;30 ;28 N/mm2, the mold density of 2.23; 1.93; 1.81; 1.78 kg/mm3. While the composition of the test results obtained for the wet sand molding , resin , CO2 and cement, the carbon equivalent (CE) sequentially decreased 4.72%CE ; 4.31%CE; 4.31% and 4.21% CE, as well as deradjad saturation (Sc) generated 1.24%Sc; 1.09%Sc; 1.12% and 1.12%Sc. Keywords : castings , gray cast iron , bentonite , resin , carbon equivalent

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Jurnal Penelitian Inovasi

Jurnal Penelitian Inovasi is an open access, peer-reviewed journal that publishes original resear... tampilkan semua