An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part
The automotive industry has tried to employ ultra-high-strength steel (UHSS), which has a higher strength with a thinner thickness. However, because of its low formability, there is a limit to the use of UHSS in industrial applications. Even though the hot-press-forming method can resolve the formab...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-11-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/10/11/1543 |
| _version_ | 1797547330806743040 |
|---|---|
| author | Ki-Young Kim Eun-Ho Lee Soo-Hyun Park Youn-Hee Kang Jong-Youn Park Hyoun-Young Lee Chang Ho Moon Kisoo Kim |
| author_facet | Ki-Young Kim Eun-Ho Lee Soo-Hyun Park Youn-Hee Kang Jong-Youn Park Hyoun-Young Lee Chang Ho Moon Kisoo Kim |
| author_sort | Ki-Young Kim |
| collection | DOAJ |
| description | The automotive industry has tried to employ ultra-high-strength steel (UHSS), which has a higher strength with a thinner thickness. However, because of its low formability, there is a limit to the use of UHSS in industrial applications. Even though the hot-press-forming method can resolve the formability problem, elevated-temperature conditions lead to side effects—heat transfer and productivity issues. This work presents the concept of an infrared local-heat-assisted cold stamping process. Before the forming process, local areas, where the formability problem occurs, are locally heated by the gathering of infrared rays and cooled to room temperature before delivery. Since the heat treatment is completed by the material supplier, the stamping companies can conduct cold stamping without new investments or the productivity issue. In this work, a heat-assisted cold V-bending test was conducted with a martensitic (MS) 1.5 GPa steel, the CR1470M steel provided by POSCO. The heating effects on the microstructure, hardness, and local ductility were also observed. Finally, a commercial door impact beam was successfully manufactured with the present method. In this application, only a targeted small area was heated. The results show that the present method can improve the formability and springback problems of MS steel in the stamping process. |
| first_indexed | 2024-03-10T14:42:46Z |
| format | Article |
| id | doaj.art-4be5edb032f94ff893009fda17cab660 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T14:42:46Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-4be5edb032f94ff893009fda17cab6602023-11-20T21:39:45ZengMDPI AGMetals2075-47012020-11-011011154310.3390/met10111543An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto PartKi-Young Kim0Eun-Ho Lee1Soo-Hyun Park2Youn-Hee Kang3Jong-Youn Park4Hyoun-Young Lee5Chang Ho Moon6Kisoo Kim7School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Gyeonggi-do, KoreaSchool of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Gyeonggi-do, KoreaIndustrial Tools Technology Department, Ewha Diamond Co., Osan 18145, Gyeonggi-do, KoreaProcess & Engineering Research Labs. POSCO, Pohang 37859, KoreaSteel Solution Research Labs. POSCO, Incheon 21985, KoreaSteel Solution Research Labs. POSCO, Incheon 21985, KoreaProcess & Engineering Research Labs. POSCO, Pohang 37859, KoreaProcess & Engineering Research Labs. POSCO, Pohang 37859, KoreaThe automotive industry has tried to employ ultra-high-strength steel (UHSS), which has a higher strength with a thinner thickness. However, because of its low formability, there is a limit to the use of UHSS in industrial applications. Even though the hot-press-forming method can resolve the formability problem, elevated-temperature conditions lead to side effects—heat transfer and productivity issues. This work presents the concept of an infrared local-heat-assisted cold stamping process. Before the forming process, local areas, where the formability problem occurs, are locally heated by the gathering of infrared rays and cooled to room temperature before delivery. Since the heat treatment is completed by the material supplier, the stamping companies can conduct cold stamping without new investments or the productivity issue. In this work, a heat-assisted cold V-bending test was conducted with a martensitic (MS) 1.5 GPa steel, the CR1470M steel provided by POSCO. The heating effects on the microstructure, hardness, and local ductility were also observed. Finally, a commercial door impact beam was successfully manufactured with the present method. In this application, only a targeted small area was heated. The results show that the present method can improve the formability and springback problems of MS steel in the stamping process.https://www.mdpi.com/2075-4701/10/11/1543martensitic steelformabilityspringbackinfrared heatinglocal heat treatmentdoor impact beam |
| spellingShingle | Ki-Young Kim Eun-Ho Lee Soo-Hyun Park Youn-Hee Kang Jong-Youn Park Hyoun-Young Lee Chang Ho Moon Kisoo Kim An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part Metals martensitic steel formability springback infrared heating local heat treatment door impact beam |
| title | An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part |
| title_full | An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part |
| title_fullStr | An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part |
| title_full_unstemmed | An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part |
| title_short | An Infrared Local-Heat-Assisted Cold Stamping Process for Martensitic Steel and Application to an Auto Part |
| title_sort | infrared local heat assisted cold stamping process for martensitic steel and application to an auto part |
| topic | martensitic steel formability springback infrared heating local heat treatment door impact beam |
| url | https://www.mdpi.com/2075-4701/10/11/1543 |
| work_keys_str_mv | AT kiyoungkim aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT eunholee aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT soohyunpark aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT younheekang aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT jongyounpark aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT hyounyounglee aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT changhomoon aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT kisookim aninfraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT kiyoungkim infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT eunholee infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT soohyunpark infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT younheekang infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT jongyounpark infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT hyounyounglee infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT changhomoon infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart AT kisookim infraredlocalheatassistedcoldstampingprocessformartensiticsteelandapplicationtoanautopart |