USAGE OF LIMESTONE AND MARBLE POWDER AS ENERGIZER FOR PACK CARBURIZING PROCESS

• Main Author: , WADI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11566
• Institution: Institut Teknologi Bandung

Limestone and marble stone are the dig substance coming from nature which its amount is very abundance in Indonesia, so that is easy to got and its price is cheap. Calcium Carbonate content in depth, make limestone and marble can use as energizer at pack carburizing process for substitute Barium Carbonate which friendliness less be environmental. The addition of energizer can improve the effectiveness of pack carburizing by quickening forming of Carbon Monoxide gaseous. Others, to accelerate Carbon Monoxide forming, also can do with minimize size of energizer into smooth powder.<p>From hardness Vickers test result, we got Effective Case Depth (ECD). For the use of limestone powder as energizer, ECD maximum at composition of mixture 10%wt energizer and 90%wt charcoal. ECD yielded by that is about 1.10 mm. For the usage of marble stone powder, composition of the mixture optimum at 10%wt-20%wt energizer. Maximum ECD yielded at this composition is about 0.99 mm. For the difference size of energizer powder used, pack carburizing done at composition of the mixture with 10%wt energizer and 90%wt charcoal. Limestone powder as energizer with the smallest size (0.074-0.21 mm), give ECD is about 1.10 mm, and then for the biggest size give ECD about 0.59 mm. Furthermore, for marble stone powder as energizer, the smallest size give ECD is about 0.99 mm, and then for the biggest size of energizer give ECD about 0.64 mm. <br />