Aristofa, Mohammad Kevin (2024) Analisis Kegagalan Komponen Work Roll Alloy Steel Pada High Rolling Mill PT X Dilihat Dari Proses Terjadinya Crack. Masters thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 5011201077-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
5011201077-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2026. Download (6MB) | Request a copy |
|
Text
5011201077-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2026. Download (6MB) | Request a copy |
Abstract
High Rolling Mill ini sering mengalami kegagalan kerja terutama pada komponen work roll. Penelitian dilakukan dengan melakukan pengamatan dan pengujian terhadap komponen material dimana spesimen uji didapatkan dari PT X yang mengalami kegagalan spalling pada permukaan komponen dan spesimen komponen yang belum mengalami kegagalan. Pengujian yang dilakukan adalah pengujian OES, pengujian kekerasan, pengujian metalografi, pengujian SEM-EDX, dan pengamatan visual makro. Dari hasil pengujian komposisi menunjukkan komponen memiliki komposisi yang mendekati standar ASTM A295-52100. Dari pengamatan visual makro, permukaan material yang mengalami kegagalan menunjukkan adanya spalling dan surface flaking di area yang berdekatan. Dari data yang didapatkan selama proses inspeksi, komponen mengalami kegagalan setelah 73 kali beroperasi. Pada pengamatan SEM, terlihat bahwa pada kedua permukaan komponen memiliki porositas pada permukaannya dan terdapat garis striasi yang berada di bawah dari crack yang dialami komponen. Pada pengujian EDX terlihat bahwa pada komponen yang mengalami kegagalan spalling memiliki persentase oksida yang tinggi sebesar 28,07% sedangkan komponen yang belum mengalami kegagalan tidak terdeteksi unsur oksida sehingga tidak berpotensi terjadi proses oksidasi pada permukaan. Kedua komponen menampilkan struktur fasa berupa tempered martensite dan karbida sementit. Perbedaan dari keduanya terlihat bahwa karbida sementit pada komponen yang mengalami kegagalan lebih banyak karena temperatur yang lebih tinggi pada permukaan. Uji kekerasan menunjukkan kekerasan material di angka 723,34 HV untuk komponen belum mengalami kegagalan dan 727,04 HV untuk komponen yang sudah mengalami kegagalan. Nilai kekerasan yang didapat terlampau sesuai dengan range standar ASTM A295-52100 dimana memiliki kekerasan yang tinggi dan tahan terhadap keausan.
==========================================================================================
In operation, this High Rolling Mill often experiences work failures, especially on work roll components. The research was conducted by observing and testing the material components where the test specimens were obtained from PT X which experienced spalling failures on the surface of the components and component specimens that had not yet failed. The tests carried out were OES testing, hardness testing, metallographic testing, SEM-EDX testing, and macro visual observation. The composition test results show that the components have a composition that is close to the ASTM A295-52100 standard. From macro visual observations, the surface of the failed material shows spalling and surface flaking in adjacent areas. From the data obtained during the inspection process, the component failed after 73 operations. In SEM observations, it can be seen that both component surfaces have porosity on the surface and there are striation lines below the crack experienced by the component. EDX testing showed that the component that experienced spalling failure had a high oxide percentage of 28.07% while the component that had not experienced failure was not detected. oxide elements so that the potential for oxidation processes to occur on the surface. Both components display phase structures of tempered martensite and cementite carbides. The difference between the two is that there are more cementite carbides in the failed component due to the higher temperature at the surface. The hardness test shows the hardness of the material at 723.34 HV for the component that has not failed and 727.04 HV for the component that has failed. The hardness values obtained are in accordance with the ASTM A295-52100 standard range which has high hardness and is resistant to wear.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Failure Analysis, Crack, Work Roll,Analisa Kegagalan, Crack, Work Roll |
| Subjects: | T Technology > T Technology (General) > T174.5 Technology--Risk assessment. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Mohammad Kevin Aristofa |
| Date Deposited: | 06 Aug 2024 06:41 |
| Last Modified: | 06 Aug 2024 06:41 |
| URI: | http://repository.its.ac.id/id/eprint/111194 |
Actions (login required)
 |
View Item |