Pengaruh Jenis Forming Terhadap Struktur Kristal dan Struktur Mikro pada Baja Karbon Rendah Tipe MR

Santoso, Bramasta Aji (2023) Pengaruh Jenis Forming Terhadap Struktur Kristal dan Struktur Mikro pada Baja Karbon Rendah Tipe MR. S1 thesis, Universitas Kristen Indonesia.

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Abstract

Penelitian ini menjelaskan tentang pengaruh dari jenis forming material baja karbon rendah tipe MR terhadap kekerasan, kekuatan tarik, dan struktur kristal dari material tersebut, karena material tersebut umum digunakan sebagai bagian body pada kaleng untuk kemasan makanan ataupun minuman yang dalam pembuatannya memerlukan proses forming bending. Perlakuan forming kepada material mempengaruhi nilai kekerasan, kekuatan tarik, dan struktur kristal material. Material uji dibedakan menjadi 3 menurut proses forming, dari material awal tanpa proses forming, material dengan proses forming flanging, material dengan proses forming flanging dan beading. Material sampel diambil sebelum dan sesudah proses forming. Hasil sampel lalu dilakukan pengujian, yaitu pengujian kekerasan dengan hardness tester (brinell), pengujian kekuatan tarik dengan alat yang sama dengan hardness tester lalu dikonversi nilainya, dan struktur kristal dengan menggunakan X-Ray Diffraction test. Dari hasil penelitian menunjukkan kondisi material setelah di forming mengalami perubahan pada kekerasan dan kekuatan tarik nya, sedangkan untuk struktur kristal tidak terlalu berpengaruh karena hasilnya tidak berbeda jauh diantara 3 material uji tersebut. Kata Kunci : forming, bending, hardness, kekuatan tarik, X-Ray Diffraction. / As this material is frequently used as a body part on cans for food or beverage packaging that requires a forming bending process to manufacture, this study explains the effect of the type of MR type low carbon steel forming material on the material's hardness, tensile strength, and crystal structure. The material's hardness, tensile strength, and crystal structure are affected by the forming treatment. The test material is separated into 3 as per the framing system, from beginning material without shaping cycle, material with flanging shaping interaction, material with shaping flanging and beading process. Material examples are taken when the shaping system. The example results were then tried, specifically hardness testing with a hardness analyzer (brinell), rigidity testing with a similar instrument as a hardness analyzer and afterward changing over the worth, and precious stone construction utilizing the X-Beam Diffraction test. The study showed that the material's condition after forming changed its hardness and tensile strength, but that the crystal structure didn't really matter because the results didn't really vary much between the three test materials. Key Words : forming, bending, hardness, tensile strength, X-Ray Diffraction

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