금형 강 표면 처리에 따른 AZ31B 마그네슘 합금 판재 Galling 거동의 변화

다국어 초록 (Multilingual Abstract)

In this study, tribological phenomena and galling mechanisms of tool steel coated with various coatings (DLC, CrN and TiN) were examined during sliding against AZ31 B Mg alloy. Reciprocating sliding of the coated tool steel against the Mg alloy plate was carried out at various temperatures under an un lubricated condition. The galling behavior was evaluated by measuring friction coefficient and surface roughness together with SEM observation. Higher and severely fluctuating friction coefficient (stick-slip oscillations) was measured when the Mg particles are transferred from the alloy plate to the tool steel surfaces. DLC coating showed improved anti-galling properties at room temperature during the sliding. However, at high temperature, the coating did not reduce galling and related tribological interactions between the coated steel and the Mg alloy. CrN and TiN coatings showed poor galling characteristics at room temperature compared with uncoated tool steels.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험방법
• 3. 실험결과
• 4. 결론
• 참고문헌