마그네슘 합금의 판재 성형 시 금형-판재간 응착문제 해결을 위한 표면처리

다국어 초록 (Multilingual Abstract)

In this study, surface of a AZ31B Mg alloy sheet was coated with Mg(OH)₂ film and its tribological characteristics were evaluated during hot forming. The coating was applied to the sheet with a hope of avoiding tribological problems during sheet forming the alloy sheet such as wear, stciking and galling of forming tools and sheets. Flat surface-on-disk reciprocating tests were carried out using the AZ31B Mg alloy sheet and STD-61 tool steel as the surface and the disk, respectively. The tests were performed at various applied loads under both dry and lubricated condition at room temperature and 250℃. Tool steel disks with PVD coatings were also evaluated. Galling of the AZ31B magnesium alloy sheet was examined by measuring friction coefficient, surface roughness and observing slid surfaces of both the Mg alloy sheet and coated tool surface by OM and SEM. The Mg(OH)₂ film reduced friction coefficient and effectively suppressed galling of the Mg alloy sheet.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 방법
• 3. 실험결과
• 4. 결론
• 참고문헌