Pelat Baja Tahan Abrasi

Tahan abrasi (AR) pelat baja adalah kekuatan tinggi, high-hardness alloy designed to perform in harsh industrial environments.
It is engineered to resist keausan geser, impact abrasion, and surface fatigue caused by materials such as rock, bijih, batu bara, or concrete.

Producing AR steel requires strict control of chemical composition, perlakuan panas, dan kualitas permukaan to achieve the ideal balance between kekerasan dan ketangguhan.

1. Manufacturing Process of Abrasion Resistant Steel Plate

The production of AR steel plate involves several controlled metallurgical steps:

1.1 Raw Material Selection

• High-quality baja paduan rendah is used as a base.

• Elemen paduan seperti karbon (C), mangan (M N), kromium (Kr), nikel (Di dalam), molibdenum (Mo), Dan boron (B) are added to increase kekerasan dan ketahanan aus.

• Precise control of carbon ensures a good balance between strength and weldability.

1.2 Melting and Refining

• The steel is melted in an electric arc furnace (EAF) atau basic oxygen furnace (BOF).

• Secondary refining (LF or VD treatment) removes impurities like sulfur and phosphorus to improve toughness and cleanliness.

1.3 Continuous Casting and Rolling

• Molten steel is cast into slabs and then hot rolled into plates of the desired thickness.

• Controlled rolling at precise temperatures refines the grain structure and improves strength.

1.4 Perlakuan Panas (Quenching and Tempering)

• Pendinginan: The plate is rapidly cooled from the austenitizing temperature (around 850–900°C) in water or polymer solution.

  • Ini membentuk a martensitic microstructure, achieving hardness levels of 360–600 PBR.

• Tempering: The plate is reheated (200–300°C) to relieve internal stress and enhance toughness.

  • The result is a balance between high hardness and impact strength.

1.5 Flattening and Surface Finishing

• Piring adalah leveled, shot-blasted, and pickled to remove scale and achieve a clean surface.

• Final inspection ensures consistent hardness through the thickness.

2. Fabrication and Processing of AR Steel Plate

Because of its high hardness, pelat tahan abrasi requires special techniques for cutting, pembengkokan, dan pengelasan.

2.1 Pemotongan

2.2 Membungkuk dan Membentuk

• Best performed on AR360–AR400 nilai.

• Plates should be preheated (100–150°C) before bending to reduce cracking risk.

• Inside bend radius should be at least 3–5× plate thickness.

• Higher hardness grades (AR500-AR600) are less suitable for forming and should be cut into shape instead.

2.3 Pengelasan

Proper preheat and controlled cooling prevent hydrogen-induced cracking and maintain the plate’s hardness near the weld zone.

2.4 permesinan

• Drilling or milling AR steel requires carbide-tipped tools Dan low cutting speed.

• Menggunakan coolant Dan constant feed pressure to minimize heat buildup.

• For very high hardness grades, EDM (electric discharge machining) may be used.

3. Aplikasi Industri

4. Advantages of Industrial Use

• Umur Layanan Lebih Lama: Up to 3–5× that of ordinary structural steel.

• Mengurangi Pemeliharaan: Lower replacement and downtime costs.

• Kekuatan Struktural: High yield strength allows lighter designs.

• Keserbagunaan: Bisa dilas, machined, or bolted into assemblies.