| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
The Process Design to Control the Yield Ratio of Yield-Ratio-Control-Steel on Both Wire Production and Forging Process |
| Author(s) |
Youngseon Lee |
| On-Site Speaker (Planned) |
Youngseon Lee |
| Abstract Scope |
Yield-ratio-control-steel(YRCS) is a steel which the yield strength can be controlled although the same tensile strength. The lower yield ratio steel is more effective for cold forging since the forging load is lower and tool life is enhanced. The yield ratio of YRCS metal is controlled by plastic deformation amount and cooling rate. So, the yield ratio is changed cooling rate after wire rolling as well as plastic deformation during cold wire drawing. Moreover, precision forged part can be used directly without post-heat-treatment(quenching/tempering) because the strength of forged part is increased by work hardening and grain refinement. Three major process variables are considered to get the proper yield ratio on cold forging of bolt which tensile strength is over 800 MPa. The cold drawing amount of wire is major variable to change the yield ratio, while cooling rate is the most important variable affected on their strength. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |