Springback Prediction of a Hot Stamping Component Based on the Area Fractions of Phases
Abstract
:1. Introduction
2. Experimental Study
2.1. THS Experiments
2.2. Metallography
2.3. Springback Measurement
3. Results and Discussion
3.1. Quenched Phases Analysis
3.2. Springback Results
4. Conclusions
- (1)
- The quenched microstructure of the cold zone was almost full martensite. The quenched microstructure of the hot zone changed greatly with increasing heating tool temperature. The area fraction of martensite dropped dramatically at heating tool temperatures higher than 200 °C. When the heating tool temperature was 600 °C, martensite dropped to 13% and bainite increased to 70%. Ferrite gradually increased at temperatures ranging from 25 °C to 600 °C and its maximum was close to 17%.
- (2)
- The springback angle of the cold zone was large and remained unchanged with the increase of the heating tool temperature. When the heating tool temperature was higher than 300 °C, the springback angle of the hot zone decreased significantly. The springback angle was minimum and the change of it tended to be stable with the heating tool temperature over 550 °C.
- (3)
- The relationship between the area fractions of quenched phases and the springback angle was established by the optimization method. A relative error analysis revealed that the relationship could be used to accurately predict the springback of a tailored formed hot stamped component.
Author Contributions
Funding
Conflicts of Interest
References
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C | Mn | B | Si | P | Cu | Ni | Cr | Al | Ti | Mo |
---|---|---|---|---|---|---|---|---|---|---|
0.22 | 1.23 | 0.004 | 0.25 | 0.008 | 0.03 | 0.02 | 0.20 | 0.03 | 0.037 | <0.02 |
Heating Tool Temperature (°C) | Measured Value (°) | Calculated Value (°) |
---|---|---|
25 | 2.51 | 2.65 |
100 | 2.49 | 2.49 |
200 | 2.40 | 2.33 |
300 | 1.96 | 1.86 |
400 | 1.43 | 1.40 |
500 | 0.55 | 0.59 |
550 | 0.42 | 0.45 |
600 | 0.41 | 0.41 |
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Li, X.; Yan, X.; Zhang, Z. Springback Prediction of a Hot Stamping Component Based on the Area Fractions of Phases. Metals 2019, 9, 694. https://doi.org/10.3390/met9060694
Li X, Yan X, Zhang Z. Springback Prediction of a Hot Stamping Component Based on the Area Fractions of Phases. Metals. 2019; 9(6):694. https://doi.org/10.3390/met9060694
Chicago/Turabian StyleLi, Xiangji, Xu Yan, and Zhiqiang Zhang. 2019. "Springback Prediction of a Hot Stamping Component Based on the Area Fractions of Phases" Metals 9, no. 6: 694. https://doi.org/10.3390/met9060694