Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions
The limited thermal conductivity of compacted graphite iron constrains its application in brake discs. The matrix plays a crucial role in balancing the thermal conductivity and mechanical performance of compacted graphite iron. Therefore, two kinds of compacted graphite brake discs with different fe...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/14/3/332 |
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| author | Zhuo Xu Guiquan Wang Yanxiang Li |
| author_facet | Zhuo Xu Guiquan Wang Yanxiang Li |
| author_sort | Zhuo Xu |
| collection | DOAJ |
| description | The limited thermal conductivity of compacted graphite iron constrains its application in brake discs. The matrix plays a crucial role in balancing the thermal conductivity and mechanical performance of compacted graphite iron. Therefore, two kinds of compacted graphite brake discs with different ferrite proportions were utilized to investigate their thermal cracking and friction performance under intensive braking conditions based on inertia friction tests. The variations in peak temperature, pressure load and friction coefficient stability were also analyzed. The brake disc with a higher ferrite proportion exhibited a lower peak temperature, attributed to increased thermal conductivity. Moreover, the elevated content of soft ferrite resulted in a greater furrow height on the worn surface, contributing to an increase in friction force and stability. As a result, both the input pressure and mechanical stress decreased. It was observed that the compacted graphite iron brake disc with a higher ferrite proportion exhibited fewer thermal cracks without compromising wear resistance. Furthermore, the results suggest that lowering the disc temperature to 210 °C–250 °C can mitigate fatigue wear and matrix oxidation, hindering the propagation of thermal cracks. |
| first_indexed | 2024-04-24T18:01:18Z |
| format | Article |
| id | doaj.art-3501a02eccff4046875104bbec47ad32 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-04-24T18:01:18Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-3501a02eccff4046875104bbec47ad322024-03-27T13:54:27ZengMDPI AGMetals2075-47012024-03-0114333210.3390/met14030332Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking ConditionsZhuo Xu0Guiquan Wang1Yanxiang Li2School of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, ChinaSchool of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, ChinaSchool of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaThe limited thermal conductivity of compacted graphite iron constrains its application in brake discs. The matrix plays a crucial role in balancing the thermal conductivity and mechanical performance of compacted graphite iron. Therefore, two kinds of compacted graphite brake discs with different ferrite proportions were utilized to investigate their thermal cracking and friction performance under intensive braking conditions based on inertia friction tests. The variations in peak temperature, pressure load and friction coefficient stability were also analyzed. The brake disc with a higher ferrite proportion exhibited a lower peak temperature, attributed to increased thermal conductivity. Moreover, the elevated content of soft ferrite resulted in a greater furrow height on the worn surface, contributing to an increase in friction force and stability. As a result, both the input pressure and mechanical stress decreased. It was observed that the compacted graphite iron brake disc with a higher ferrite proportion exhibited fewer thermal cracks without compromising wear resistance. Furthermore, the results suggest that lowering the disc temperature to 210 °C–250 °C can mitigate fatigue wear and matrix oxidation, hindering the propagation of thermal cracks.https://www.mdpi.com/2075-4701/14/3/332thermal crackingfrictioncompacted graphite ironbrake dischigh deceleration |
| spellingShingle | Zhuo Xu Guiquan Wang Yanxiang Li Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions Metals thermal cracking friction compacted graphite iron brake disc high deceleration |
| title | Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions |
| title_full | Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions |
| title_fullStr | Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions |
| title_full_unstemmed | Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions |
| title_short | Thermal Cracking and Friction Performance of Two Kinds of Compacted Graphite Iron Brake Discs under Intensive Braking Conditions |
| title_sort | thermal cracking and friction performance of two kinds of compacted graphite iron brake discs under intensive braking conditions |
| topic | thermal cracking friction compacted graphite iron brake disc high deceleration |
| url | https://www.mdpi.com/2075-4701/14/3/332 |
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