Effects Of Boronizing On Grooved Metal Surface

Liew, Johnnie Zhong Li (2017) Effects Of Boronizing On Grooved Metal Surface. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The main purpose of this project was to study the effects of temperature and time on the boride layer thickness of grooved surface. Boronizing is a thermo-chemical surface hardening process that allow the boron atoms diffuse into the metal surface. Different geometry groove surface is expected to affect the boronizing thickness and diffusion rate. The boronizing thickness and effectiveness of diffusion rate on different grooved geometry surfaces were studied. There were nine fabricated specimens in this project. Each of the specimen has four different grooved surfaces which are U-shaped (rectangular), 2mm C-shaped (circular), 4mm C-shaped (circular) and V-shaped (triangular). The specimens were placed in furnace for heating process. The boronizing time were 2 hours, 4 hours and 6 hours wheareas the boronizing temprature were 1123K, 1173K and 1223K. The specimens were cooled down in room temperature. Specimens were grinded and polished. The specimens were characterized for boride layer thickness measurement by using Scanning Electron Microscope and Inverted Optical Microscope. The activation energy of each grooved surface was calculated and analysed. The result and analysis showed that the boronizing thickness of different geometry surfaces were increased with temperature but inconsistent with time.

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