耐摩耗鋼板

耐摩耗鋼板

耐摩耗鋼板 is produced through advanced alloy design, precision rolling, and quenching-tempering treatment.
その組み合わせは、 硬度, 強さ, そして靭性 allows it to perform reliably under extreme wear conditions.
Proper fabrication — including controlled cutting, 溶接, そして形成 — ensures the steel retains its superior wear resistance throughout industrial applications.

カテゴリー: 高マンガン鋼板, NMシリーズ

説明

耐摩耗性 (AR) 鋼板 高強度です, high-hardness alloy designed to perform in harsh industrial environments.
It is engineered to resist sliding wear, impact abrasion, and surface fatigue caused by materials such as rock, 鉱石, 石炭, or concrete.

Producing AR steel requires strict control of chemical composition, heat treatment, そして表面品質 to achieve the ideal balance between 硬さと靱性.

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 low-alloy steel is used as a base.
Alloying elements such as 炭素 (C), マンガン (ん), クロム (Cr), ニッケル (で), モリブデン (モー), そして boron (B) are added to increase hardness and wear resistance.
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) または 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 熱処理 (Quenching and Tempering)

焼入れ: The plate is rapidly cooled from the austenitizing temperature (around 850–900°C) in water or polymer solution.
- これにより、 martensitic microstructure, achieving hardness levels of 360–600 HBW.
テンパリング: 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

Plates are 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, abrasion resistant plate requires special techniques for cutting, 曲げ, そして溶接.

2.1 切断

方法	説明	おすすめ
プラズマ切断	Most common; clean edge and high precision	Use slow speed and preheat for thicker plates
レーザー切断	Ideal for thin plates (<20 mm)	Minimal heat distortion
ウォータージェット切断	Cold process, no thermal effect	Suitable for high-hardness grades
Flame Cutting	For thick plates (>40 mm)	Preheat to 150–200°C to avoid cracking

2.2 曲げ加工

Best performed on AR360–AR400 成績.
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 溶接

側面	Guideline
予熱	120–200℃ (depends on thickness and hardness)
Filler Material	Low hydrogen welding wire or electrode
Interpass Temperature	Maintain <250℃
溶接後の熱治療	Usually not required; avoid over-tempering
Welding Type	GMAW, FCAW, or SMAW with low hydrogen control

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

2.4 機械加工

Drilling or milling AR steel requires carbide-tipped tools そして low cutting speed.
使用 coolant そして constant feed pressure to minimize heat buildup.
For very high hardness grades, 放電加工 (electric discharge machining) may be used.

3. 産業用途

業界	代表的なコンポーネント	推奨グレード
マイニング & 採石業	クラッシャーライナー, ホッパー, ダンプトラックの荷台	AR450 / AR500
建設機械	バケツ, ブルドーザーのブレード, 滝	AR400 / NM400
セメント & コンクリート	Mixers, コンベア, フィーダー	AR400 / AR450
鋼鉄 & 発電所	Coal chutes, ファンブレード, 灰パイプライン	AR500 / AR600
Recycling Industry	シュレッダー, ハンマー, プレートを着用してください	AR500 / AR600 / MN13