표제지
목차
Abstract 7
I. 서론 9
II. 실험 방법 11
1. 소재선정 11
2. 보로나이징 처리 14
2.1. 팩분말 성분분석 14
2.2. 보로나이징 처리 16
3. 시료의 특성 분석 18
III. 결과 및 고찰 19
1. 보라이드층의 분석 19
1.1. 처리온도 와 팩 보라이드 분말성분의 영향 19
1.2. 모재 합금원소의 영향 27
2. 보로나이징 처리재의 내식성 시험결과 43
IV. 결론 45
Reference 46
Table 1. Chemical compositions of boronized samples 13
Table 2. Chemical Compositions of pack boronizing 15
Table 3. Thickness Change of boronized layer according to… 20
Table 4. Variation of boronizing thickness according to amount of Cr 28
Table 5. Hardness of samples and boronizing layers according to change the amount of Cr (HV, weight 300g) 34
Fig. 1. Thickness variation of boronized layer according to… 20
Fig. 2. Microstructures of boronized layer on carbon steel's specimen(C-1 pack) 24
Fig. 3. Micro structures of boronized layer on carbon steel's specimen(O-1 pack) 25
Fig. 4. Micro structures of boronized layer on carbon steels specimen(O-2 pack) 26
Fig. 5. Relation of volume of a compound metals element and thickness of boronized layer 30
Fig. 6. Change a thickness of boronized layer on 950℃, 4hr condition 32
Fig. 7. Hardness of specimens and boronizing layers according to variation the amounts of Cr (HV, weight 300g) 34
Fig. 8. Hardness of a boronized materials according to change of a compound metals 37
Fig. 9. Micro structures process according to change the amount of Cr(×200) 40
Fig. 10. The boronized layers at 950℃, 4hr(O-2 pack) 42
Fig. 11. Weight loss of boronizing samples(C-1, O-2) in 48hr a soaked experiment 44
Fig. 12. Weight loss after a soaked experiment according to thickness of boronized layers 44