Steel wear refers to the gradual material loss of steel surfaces caused by mechanical action such as friction, 摩耗, インパクト, and sliding contact. In industrial environments like mining, セメント生産, 鉄鋼工場, and bulk material handling, wear is one of the main failure mechanisms of equipment.

To improve service life, 耐摩耗鋼 are specially designed to slow down or resist this material loss through optimized hardness, 微細構造, and alloy composition.

What Causes Steel Wear?

Steel wear mainly occurs through several mechanisms:

1. 研磨摩耗

Hard particles (砂, 鉱石, クリンカー) slide or roll across the steel surface and remove material.

• Common in mining and cement industries
• Main reason for rapid plate thinning

2. Impact Wear

Repeated high-energy impacts cause surface deformation and cracking.

• 掘削機バケット
• クラッシャーライナー
• ダンプトラックの荷台

3. 接着剤の摩耗

Two metal surfaces stick together under pressure and then tear apart.

• Occurs in moving mechanical parts
• Leads to surface damage and material transfer

4. Erosive Wear

High-speed particles strike the steel surface and gradually erode it.

• Pneumatic conveying systems
• Coal and ash transport pipelines

Why Wear-Resistant Steel Works

Wear-resistant steel reduces material loss through three main principles:

1. 高い表面硬度

Hardness is the first defense against wear.

• Hard surface resists cutting by abrasive particles
• Reduces penetration depth of external materials
• Slows down surface deformation

Typical wear steels range from:

• 360 HBW (AR400)
• まで 540+ HBW (AR500 and above)

2. Optimized Microstructure

Wear-resistant steels are engineered through heat treatment to form special structures:

• Martensitic structure (AR/NM steels)
• Fine grain structure for uniform hardness
• Carbide-rich phases in alloy steels

These structures improve resistance to cracking and surface damage.

3. 合金強化要素

摩耗性能を向上させる重要な要素:

• 炭素 (C): 硬度が増す
• クロム (Cr): improves wear and oxidation resistance
• マンガン (ん): improves toughness
• モリブデン (モー): stabilizes hardness under stress

These elements work together to balance hardness and toughness.

4. Work Hardening Effect (Special Steels)

Some steels, especially high manganese steel, become harder during use:

• Surface becomes stronger under impact
• Extends service life in high-impact environments
• Ideal for crusher and mining applications

How Wear-Resistant Steel Extends Service Life

Wear-resistant steel does not eliminate wear—it slows it down by:

• Reducing material removal rate
• Distributing impact energy
• Preventing deep surface damage
• Maintaining structural integrity over time

This results in:

• Longer equipment lifespan
• Reduced maintenance frequency
• Lower replacement cost

比較: Wear-Resistant Steel vs Carbon Steel

Where Steel Wear Is Most Severe

鉱業

• Ore crushing and transport
• 掘削機バケット
• Hopper and chute systems

セメント産業

• 粉砕機
• Kiln systems
• Material transfer equipment

鉄鋼業

• Sinter plants
• コークス処理システム
• コンベヤの摩耗ゾーン

発電所

• 石炭処理システム
• Ash discharge pipelines