PENGARUH NITROCARBURIZING TERHADAP KEKERASAN, STRUKTUR MIKRO DAN LAJU KOROSI PADA BAJA TAHAN KARAT AISI 410
AISI 410 stainless steel is one of the stainless steels that are widely used in medical. Improvement of mechanical properties of martensitic stainless steels can be done by means of surface hardening. Various surface engineering technologies have been developed to increase the hardness, one of which...
Saved in:
| Main Authors: | , |
|---|---|
| 格式: | Theses and Dissertations NonPeerReviewed |
| 出版: |
[Yogyakarta] : Universitas Gadjah Mada
2014
|
| 主題: | |
| 在線閱讀: | https://repository.ugm.ac.id/128294/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=68633 |
| 標簽: |
添加標簽
沒有標簽, 成為第一個標記此記錄!
|
| 總結: | AISI 410 stainless steel is one of the stainless steels that are widely used in
medical. Improvement of mechanical properties of martensitic stainless steels can
be done by means of surface hardening. Various surface engineering technologies
have been developed to increase the hardness, one of which is nitrocarburizing.
This research was conducted to study the effect of process variations on time
nitrocarburizing stainless steel AISI 410 on hardness, microstructure and
corrosion rate.
Specimens were made with a cylindrical shape with a diameter of 14 mm
and a thickness of 3 mm. Specimens that have been smoothed and polished
surface, nitrocarburized at a temperature of 400 ° C with the variation of time 2,
3, 4, 5 and 6 hours, at a constant pressure of 1.6 mbar, in a mixed environment of
Methane, Hydrogen and Nitrogen with a weight ratio : 3.08 % CH4, 19.31 % H2,
and balance N2. The method used is a plasma glow discharge, which will cause
the ions of N and C will be deposited into the surface of the specimen.
Nitrocarburized specimens are hardness tested with microhardness tester and
observed with a microscope to see the microstructure. Specimens were also tested
with a galvanostat corrosion, corrosion test equipment type three-electrode cell,
with a 0.9% NaCl media.
The results of this study indicate that the AISI 410 stainless steel
specimens with nitrocarburizing treatment for 5 hours had the highest of
hardness, which is 368 VHN. When compared to hardness of raw material, ie
210.2 VHN, then there is an increase of 175% of hardness. The test results do not
show the microstructure changes significantly. Corrosion test results show the
corrosion rate of raw material is 0.2998 mpy, while the corrosion rate of AISI 410
stainless steel that is nitrocarburized at 400 o C, pressure of 1.6 mbar with a time
of 6 hours is 0.2467 mpy. It�s Outstanding, because the corrosion rate < 1 mpy. |
|---|