Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.
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| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2010
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| Online Access: | http://hdl.handle.net/1721.1/55236 |
| _version_ | 1826217070992293888 |
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| author | Tan, Vincent Tandean |
| author2 | Jung Hoon Chun. |
| author_facet | Jung Hoon Chun. Tan, Vincent Tandean |
| author_sort | Tan, Vincent Tandean |
| collection | MIT |
| description | Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009. |
| first_indexed | 2024-09-23T16:57:51Z |
| format | Thesis |
| id | mit-1721.1/55236 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T16:57:51Z |
| publishDate | 2010 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/552362019-04-12T15:24:24Z Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks Tan, Vincent Tandean Jung Hoon Chun. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009. Cataloged from PDF version of thesis. Includes bibliographical references (p. 84-85). The heat-treatment process in the manufacture of Wilson Rockwell steel hardness test blocks often produces parts which are inconsistent in the mean hardness and hardness uniformity. In this thesis, the sources of variation in the mean hardness and hardness uniformity of the test blocks are identified by means of metallurgical study and Design of Experiments methodology. The uniformity of temperature distribution within the heating chamber and the effect of temperature and material composition on the final microstructure of the steel are analyzed. The hardness measurements and preparation of metallographic specimens follow the standards defined by the American Society for Testing and Materials (ASTM). Several control factors including soak temperature, soak time and location within the heating furnace are included in the Design of Experiment. The effects and interactions of control factors are studied using analysis of variance (ANOVA) techniques. Response Surface Methodology (RSM) was used to minimize the hardness variation on the interaction of the control factors. The heat-treatment experiment indicated that non-uniform temperature distribution within the heating chamber resulted in test blocks of different mean hardness in a batch run. The experiment also demonstrated that hardening temperatures below the homogeneous austenite formation temperature resulted in a large hardness variation. Several control factors and interaction between the factors that are significant on the mean hardness and hardness variation are identified. And finally, recommendations of control factor settings that minimize the hardness variation are presented in this thesis. by Vincent Tandean Tan. M.Eng. 2010-05-25T21:08:11Z 2010-05-25T21:08:11Z 2009 2009 Thesis http://hdl.handle.net/1721.1/55236 611986636 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 85 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Tan, Vincent Tandean Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks |
| title | Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks |
| title_full | Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks |
| title_fullStr | Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks |
| title_full_unstemmed | Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks |
| title_short | Heat treatment optimization in the manufacture of Wilson Rockwell steel hardness test blocks |
| title_sort | heat treatment optimization in the manufacture of wilson rockwell steel hardness test blocks |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/55236 |
| work_keys_str_mv | AT tanvincenttandean heattreatmentoptimizationinthemanufactureofwilsonrockwellsteelhardnesstestblocks |