YasinYusuf, Ahmad (2016) Pengaruh Diameter Dan Sudut Chamfer Terhadap Distribusi Temperatur Metode Pengelasan Cdfw Logam Al-6061 Dengan Logam Ss-304. Sarjana thesis, Universitas Brawijaya.
Abstract
Teknologi CDFW (continous drive friction welding) mulai dikembangkan karena prosesnya yang murah, cepat, dan aman. CDFW dilakukan dengan cara memberikan rotasi ke benda kerja pertama dan memberikan tekanan ke benda kerja kedua sehingga menimbulkan gesekan. Gesekan yang terjadi menghasilkan panas yang dapat menyambungkan kedua benda kerja tersebut. Penelitian ini bertujuan untuk mengetahui pengaruh diameter dan sudut chamfer terhadap distribusi temperatur benda kerja yang dihasilkan dari proses pengelasan CDFW. Material yang digunakan pada benda kerja pertama yakni Al-6061 yang memiliki temperatur rekristalisasi sebesar 315,560C dan temperatur cair sebesar 660°C. Material yang digunakan pada benda kerja kedua yakni SS-304 yang memiliki temperatur rekristalisasi sebesar 537,780C dan temperatur cair sebesar 1523,8890C. Penelitian ini menggunakan software berbasis elemen hingga. Modelling diatur dengan cara material Al-6061 dirotasi dengan kecepatan 1200rpm dan material SS-304 ditekan dengan friction pressure sebesar 50MPa selama friction time 1 detik. Pada material Al-6061 diberikan sudut chamfer dengan variasi 00, 150, dan 300 sedangkan variasi diameter benda kerja yakni 1,5 cm, 2 cm, dan 2,5 cm. Hasil penelitian menunjukkan bahwa semakin kecil sudut chamfer dan semakin besar diameter benda kerja menyebabkan distribusi temperatur yang dihasilkan semakin besar yang diakibatkan oleh proses pengelasan CDFW. Temperatur tertinggi dihasilkan oleh variasi diameter 2,5 cm sudut chamfer 00 yakni 423,640C. Sedangkan temperatur terendah dihasilkan oleh variasi diameter 1,5 cm sudut chamfer 300 yakni 152,520C. Pada prosesnya, material yang digunakan akan menyambung apabila salah satu benda kerja telah mencapai temperatur rekristalisasinya. Penyambungan las CDFW yang baik apabila daerah sambungan las berada di antara temperatur rekristalisasi dan temperatur cair material. Berdasarkan asumsi tersebut, maka variasi diameter diameter 2,5 cm sudut chamfer 00 memungkinkan memiliki hasil pengelasan yang paling baik, karena telah mencapai temperatur rekristalisasi material Al-6061 dan di bawah temperatur cair material Al-6061.
English Abstract
CDFW (continous drive friction welding) technology has been developed because of its quick process, low cost and safety. CDFW method are giving rotation in to first object and giving pressure in to second object thus make frictions between two objects. The friction produced between two objects creates heat, resulting two objects bonded. This research purposes are to knowing effect of diameter and angle of chamfer toward object’s temperature distribution produced from CDFW process. Material used for first object is Al-6061 which has recrystalisation temperature at 315,560C and melting temperature at 6600C. Material used for second object is SS-304 which has recrystalisation temperature at 537,780C and melting temperature at 1523,8890C. This research is using finite element based software. Modelling has been setting that Al-6061 material rotated with rotational speed at 1200rpm, and SS-304 material pressured with friction pressure at 50MPa during friction time which set at 1s. The chamfer applied to material Al-6061 with its angle variations are 00, 150, and 300, while diameter variations are 1,5 cm, 2 cm, and 2,5 cm. The result of this simulation shows lesser chamfer’s angle and bigger object’s diameter create higher temperature distributions during CDFW processes. Highest temperature’s distribution, which is 423,640C at the core of collided area, is shown when the model had its object’s diameter at 2,5 cm and the chamfer’s angle is 00. While lowest temperature’s distribution, which is 152,520C at the core of collided area, is shown when the model had ist variation of diameter at 1,5 cm and the angle of chamfer is 300. In the process, material will be bonded if one of material reached its recrystalisation temperature. CDFW welding process has good quality when its heat affected zone temperature between recrystalisation temperature and melting temperature of one object. Using this asumption, 2,5 cm is the best option for object’s diameter while its chamfer’s angle is 00 shown by its temperature at the core of collided area is reaching recrystalisation temperature Al-6061 and lower than melting temperature Al-6061, thus is the best condition to get the best welding quality.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FT/2016/1045/051612735 |
| Subjects: | 600 Technology (Applied sciences) > 621 Applied physics |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | Sugiantoro |
| Date Deposited: | 10 Jan 2017 13:35 |
| Last Modified: | 22 Oct 2021 00:33 |
| URI: | http://repository.ub.ac.id/id/eprint/144211 |
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