Analisis Pengaruh Perlakuan Panas Pada Dies Material SKT4 Terhadap Hasil Produk Undercarriage Link PC200 SKD NEW

Muhadzdzib, Muhammad Zhafran (2025) Analisis Pengaruh Perlakuan Panas Pada Dies Material SKT4 Terhadap Hasil Produk Undercarriage Link PC200 SKD NEW. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Material SKT4 merupakan jenis material yang termasuk kedalam hot forming mold berdasarkan standard JIS (Japan Industrial Standard) yang sering digunakan sebagai bahan dasar dies untuk proses forging karena memiliki kandungan komposisi kimia dan sifat mekanik yang sangat baik dalam pengaplikasiannya. Proses forging sendiri melibatkan benturan antara dies dan material produk secara terus menerus serta paparan suhu tinggi yang berkelanjutan juga menyebabkan ada perubahan siklus termal yang dialami oleh dies tersebut. Hal-hal tersebut akan mengakibatkan turunnya performa dari dies pada siklus operasional tertentu serta hasil produk yang mengalami defect lebih cepat muncul. Tujuan dilakukannya penelitian ini adalah untuk menganalisis pengaruh perlakuan panas dengan metode salt bath dan oil quench terhadap perubahan struktur mikro serta sifat mekanik material SKT4, serta menganalisis pengaruh perlakuan panas dengan metode salt bath dan oil quench pada dies terhadap hasil produk undercarriage link. Proses perlakuan panas yang dilakukan menggunakan metode oil quench dan salt bath quench dengan parameter proses tempering suhu 400°C dan 450°C pada material dies SKT4. Kemudian dilakukan proses forging dengan siklus operasional sebanyak 3000 pcs dan 6000 pcs. Hasil dari pengujian tersebut antara lain, dies salt bath quenching memiliki nilai kekerasan dan nilai ketahanan aus yang lebih besar dibandingkan dies oil quenching. Struktur mikro yang dihasilkan pada dies salt bath memiliki morfologi bilah-bilah martensit temper yang lebih halus, merata, dan lebih seragam dibandingkan pada dies oil quenching. Pada proses salt bath quenching tidak membentuk vapor blanket/film uap saat permukaan panas melakukan kontak dengan salt bath. Namun, salt bath langsung dalam fase cair dan proses quenching langsung ke konveksi penuh, yang berarti proses penurunan suhu dimulai dengan pendinginan yang konsisten di seluruh permukaan tanpa adanya fluktuasi yang besar, sehingga menghasilkan distribusi pendinginan yang lebih merata dan minim distorsi.
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The SKT4 material is a type of hot forming mold steel classified under the Japan Industrial Standard (JIS), commonly used as the base material for forging dies due to its excellent chemical composition and mechanical properties in application. The forging process itself involves repeated impacts between the dies and the workpiece, along with continuous exposure to high temperatures, leading to thermal cycle fluctuations experienced by the dies. These factors contribute to the decline in die performance over certain operational cycles and cause product defects to appear more quickly. The objective of this study is to analyze the effects of heat treatment using salt bath and oil quenching methods on the microstructural changes and mechanical properties of SKT4 material, as well as to examine the influence of these heat treatment methods on die performance and the resulting undercarriage link products. The heat treatment process was carried out using oil quenching and salt bath quenching methods with tempering temperatures of 400°C and 450°C applied to the SKT4 die material. Forging operations were then conducted over 3,000 and 6,000 cycles. The results showed that dies treated with salt bath quenching exhibited higher hardness and wear resistance compared to those treated with oil quenching. The microstructure of the salt bath-quenched dies displayed finer, more uniform, and evenly distributed tempered martensitic laths than those in the oil-quenched dies. During salt bath quenching, no vapor blanket or steam film forms when the hot surface comes into contact with the quenching medium. Instead, the salt bath remains in a liquid phase, allowing direct transition to full convection cooling. This results in a consistent cooling process across the entire surface, minimizing temperature fluctuations, and thereby achieving more uniform cooling distribution with minimal distortion.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Dies Forging, Perlakuan Panas, Salt Bath, SKT4, Oil Quench Forging Dies, Heat Treatment, Salt Bath, SKT4, Oil Quench
Subjects:	T Technology > TS Manufactures T Technology > TS Manufactures > TS205 Metals--Heat treatment. T Technology > TS Manufactures > TS320 Steel--Metallurgy.
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Zhafran Muhadzdzib
Date Deposited:	01 Aug 2025 02:43
Last Modified:	01 Aug 2025 02:43
URI:	http://repository.its.ac.id/id/eprint/124996

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