Micro-grooves with special structure can reduce the surface friction resistance. Rolling method can be used to form micro-grooves on metal surface efficiently. However, the micro grooves formed by this plastic forming method still had some defects, which had a serious negative impact on the drag reduction and mechanical properties of the micro grooves. Therefore, it is of great significance to optimize the multi pass rolling process to avoid the micro-groove defects. In this paper, a series of analysis on the microstructure, strain and material displacement of micro-grooves were carried out to explain the causes of micro groove defects. It was found that the overall extension of the plate has an adverse effect on the formation of micro-grooves and the hole types of the roller were optimized accordingly. The results of simulation and experiment showed that the optimized roller could produce the designed micro-groove, which perfectly avoided the generation of micro defects.

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Posted 24 May, 2021
On 22 Jul, 2021
Received 20 May, 2021
Invitations sent on 19 May, 2021
On 18 May, 2021
On 17 May, 2021
Posted 24 May, 2021
On 22 Jul, 2021
Received 20 May, 2021
Invitations sent on 19 May, 2021
On 18 May, 2021
On 17 May, 2021
Micro-grooves with special structure can reduce the surface friction resistance. Rolling method can be used to form micro-grooves on metal surface efficiently. However, the micro grooves formed by this plastic forming method still had some defects, which had a serious negative impact on the drag reduction and mechanical properties of the micro grooves. Therefore, it is of great significance to optimize the multi pass rolling process to avoid the micro-groove defects. In this paper, a series of analysis on the microstructure, strain and material displacement of micro-grooves were carried out to explain the causes of micro groove defects. It was found that the overall extension of the plate has an adverse effect on the formation of micro-grooves and the hole types of the roller were optimized accordingly. The results of simulation and experiment showed that the optimized roller could produce the designed micro-groove, which perfectly avoided the generation of micro defects.

Figure 1

Figure 2

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Figure 5

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Figure 9

Figure 10

Figure 11

Figure 12

Figure 13
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