인천대 기계공학실험 금속조직 및 경도실험 레포트

소개

"인천대 기계공학실험 금속조직 및 경도실험 레포트"에 대한 내용입니다.

목차

1. Introduction and theory (2 Page)
1) Fe-C State Diagram
2) TTT diagram (Time Temperature Transformation)
3) CCT(Continuous Cooling Transformation Curve)
4) Heat Treatment
5) Hardness Measurement

2. Experimental method
1) Specimen Cutting
2) Heat Treatment
3) Mounting
4) Grinding
5) Polishing
6) Etching
7) Grain Observation
8) Hardness Measurement

3. Experimental results
1) SM20C Metal Structure Observation
2) SM45C Metal Structure Observation
3) Hardness measurement

4. Analysis and discussion

본문내용

Through this experiment, the metal structure can be observed and the hardness can be measured. The purpose of this experiment is to observe the microstructure of the specimen for hardness measurement, to understand the pretreatment process, and to observe the effect of the type of material and the pretreatment method on the metal structure or hardness.

1)Fe-C State Diagram
The phase diagram refers to a picture showing the state change of alloys of various compositions from molten state to solidification and room temperature.
It is a figure showing the state according to the composition ratio and temperature of the alloy. The horizontal axis represents the composition and the vertical axis represents the temperature.
Iron is a BCC lattice below 910 °C, and is a FCC lattice above 910 °C and up to 1390 °C.
Here, when a carbon atom is contained, two changes occur. Transformation does not occur at a single temperature, but over a certain temperature range.

참고자료

· Hardness Conversion of Metals (tribology-abc.com), Hardness Conversion, 2023-04-08https://www.tribology-abc.com/calculators/hardness.htm
· https://terms.naver.com/entry.naver?docId=338752&cid=44616&categoryId=44616, carbon steel, 2023-04-09
· 곽호찬 박효열 황남성, 기계공작법, 2001, pp. 239~260