Experimental Investigation on the Mechanical Properties of Heat-Treated AISI O2 Tool Steel for the Application of Mild Steel Metal Cutting Die Block Design
| dc.contributor.advisor | Haileleoul Sahle (PhD) | |
| dc.contributor.author | Sisay Kebede | |
| dc.date.accessioned | 2024-10-28T08:29:29Z | |
| dc.date.available | 2024-10-28T08:29:29Z | |
| dc.date.issued | 2023-06 | |
| dc.description.abstract | The heat treatment process can change the mechanical properties like impact toughness, wear resistance, and hardness in order to avoid tool surface chemistries change heat treatment distortion must be controlled, and a careful balance must be maintained. Producing successful tools and dies control of the heat treatment process is one of the most critical steps. Industries are highly demanding reliable tool steel metal to effectively develop or process components by machine related processes, hence producing dependable parent die material is crucial for tool die design. In this study, the material behavior of AISI O2 investigated in order to find the optimum heat treatment processing parameter for the application of die block design. This research find the optimum hardness, impact energy and wear resistance of the selected material using heat treatment process parameter, Austenitizing temperature, tempering temperature and soaking time for tempering. 36Specimens prepared for the corresponding target test. Taguchi L9 orthogonal array design of experiment was used to conduct the experiment, and for each set test category, two specimen were taken to reduce variability occurred due to noise factors. MINITAB 2022 software used to identify the optimum set up of input factors with their corresponding levels. Main effect plot for signal to noise ratio revealed that tempering temperature and Austenizing temperature have a great influence on the responses. According to Taguchi Grey relational analysis Austenizing temperature 8050C, tempering temperature 2000C, soaking time for tempering 2 hours are the optimum set up of heat treatment process parameter. Generated mechanical properties results are:- Hardness 63HRC, Toughness 8.25J and wear resistance (volume loos /Mass loos/) (2.47128mm3/0.0189gram/) per 5 minutes, in order to be economical and a negligible difference of results there is also alternative result other than Taguchi Optimum result, which is at Austenizing temperature 790oC, tempering temperature 200oC and holding time of 1.5hr, 62.875HRC,8.25J and 2.47193mm3 mass loss is acceptable. For the case of wear resistance test, the loss calculated within 5minutes. Results from this work will be applicable for die designer and die manufacture. | |
| dc.identifier.uri | https://etd.aau.edu.et/handle/123456789/3525 | |
| dc.language.iso | en_US | |
| dc.publisher | Addis Ababa University | |
| dc.subject | AISI O2 | |
| dc.subject | Tool die Material | |
| dc.subject | Austenizing temperature | |
| dc.subject | Tempering temperature | |
| dc.subject | Soaking time | |
| dc.subject | Hardness | |
| dc.subject | Toughness and wear resistance | |
| dc.title | Experimental Investigation on the Mechanical Properties of Heat-Treated AISI O2 Tool Steel for the Application of Mild Steel Metal Cutting Die Block Design | |
| dc.type | Thesis |