Wear prediction of die coatings in strip ironing by finite element simulation. (3rd July 2016)

• Record Type: Journal Article
• Authors: Sabangban, N.; Mahayotsanun, N.; Sucharitpwatskul, S.; Mahabunphachai, S.
• Is Part Of: Transactions of the Institute of Metal Finishing. Volume 94:Number 4(2016:Jul.)
• Page Start: 199
• Page End: 203
• Publication Date: 2016-07-03
• Subjects: Die coatings -- Finite element simulation -- Strip ironing -- Wear -- Die service life; Metals -- Finishing -- Periodicals; Metals -- Surfaces -- Periodicals; Metallurgy -- Periodicals; 671.705
• DOI: 10.1080/00202967.2016.1180813
• Languages: English
• ISSNs: 0020-2967

Abstract

Abstract : This study has used a simple method to predict wear of die coatings used in the strip ironing of steel sheet based on Archard's wear model by using finite element (FE) simulation. This method required the information regarding the quantity of worn material and thickness of die coatings. The die stresses obtained from the FE simulation were used to calculate the wear rate and wear depth per cycle. The die and sheet materials considered were D2 tool steel and S690QL, respectively. Two types of die coatings (CrN and TiN) and their known properties were studied. The studied sliding velocities were 0.1, 1.0 and 5.0 mm s −1 . The contact pressures under investigation were 15, 150 and 1500 kPa. The results showed that TiN provided higher wear resistance due to its lower quantity of worn material (1.962 × 10 −16 m 3 ). The total wear depth per cycle increased with reducing quantity of worn material (increasing hardness value). Increase in sliding velocity led to increase in wear depth per cycle. The contact pressure (15–1500 kPa) did not significantly affect wear depth per cycle. To illustrate the acquired wear depth per cycle of all the coatings under different conditions, a predictive wear map was developed. In addition, the number of operating cycles based on the die coating thickness could be calculated. Based on the findings, the wear map could be used to help select appropriate die coatings and adjust process parameters in order to extend die service life.