Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (46권6호 264-270)

Effects of Preoxidation on High Temperature Wear of Piercing Plug Tool Steel Sliding Against SA210C Steel Used for Production of Seamless Tube

심리스 튜브 제조용 피어싱 플러그 공구강과 SA210C강의 고온 미끄럼 마모에 미치는 예비산화의 영향

최병영;구윤식;
Choi, Byung-Young;Gu, Yoon-Sik;

전북대학교 신소재공학부 및 신소재개발연구센터;전북대학교 대학원 금속공학과;
School of Advanced Materials Engineering and Research Institute of Advanced Materials Development, Chonbuk National University;Graduate School of Metallurgical Engineering, Chonbuk National University;

DOI : 10.5695/JKISE.2013.46.6.264

Abstract

Effects of preoxidation on high temperature wear of piercing plug tool steel sliding against SA210C steel used for production of seamless tube have been studied using a pin-on-disc CETR tribometer, under applied normal load of 20 N at $900^{circ}C$ in air. It was found in the preoxidized pin specimens of piercing plug tool steel that the coefficient of friction decreased to about 0.4 at an initial stage followed by showing nearly constant value of about 0.4 during high temperature wear testing. On the other hand, it was also found in the pin specimens without preoxidation that the coefficient of friction increased and fluctuated, ranging from about 0.3 to 0.6 during the tests until the running period of about 800 sec. The compact and continuous Fe-oxide layer was formed on the contact surface of the preoxidized pin specimens after high temperature wear testing followed by penetrating along the grain boundaries of coarse ferrite in the decarburized region beneath the oxide layer due to the lower hardness of the region.

Keywords

Preoxidation;High temperature wear;Piercing plug tool steel;SA210C steel;Coefficient of friction;Fe-oxide layer;Seamless tube;