Materials design and processing development proposed in this study, aims at contributing to high wear resistant and friction characteristics. To find wear resistant and friction with inner elbow pipe, it is needed hardness and frictional condition test to be capable of supplying with high Cr casting steel. The result of HTV(heat treatment in vacuum) shows that hardness increased with increasing Cr content in % carbide phase. It was about 7∼10% of hardness improvement compared to original casting elbow pipe. This behavior of the hardness of Cr casting steel was explained by the types of chemical bonds that hold atoms together in Cr carbide phase. Through the friction coefficient and wear loss test, with the increasing of Cr wt% reduction in the coefficient of friction and wear loss.

Abstract
 1. 서론
 2. 고크롬 주강용 엘보우관의 제조방법
  2.1 고크롬 주강용 엘보우관 성형
  2.2 진공 열처리
 3. 연구개발 결과 및 분석
 4. 결론
 참고문헌

• 김은성(전주비전대학교 자동화기계과) | E. S. Kim