耐摩耗鋼

Abrasion resistant steel combines 硬度, 強さ, そして靭性 to achieve exceptional resistance to wear, extending the lifespan of industrial components.
By selecting the appropriate hardness level and balancing mechanical performance with process requirements, industries can reduce maintenance downtime, improve productivity, and lower operational costs.

カテゴリー: 高マンガン鋼板, NMシリーズ

説明

耐摩耗性 (AR) 鋼鉄 is a high-strength steel specifically developed to withstand intensive wear, 摩擦, そして影響.
The material’s wear-resistant performance is achieved mainly through high surface hardness, uniform hardness through the thickness, そして controlled alloying for toughness and strength balance.

These steels are commonly used in mining, 工事, セメント, and material handling equipment—where sliding, えぐる, and impact abrasion occur continuously.

Main Wear-Resistant Properties

高い表面硬度
- Hardness levels typically range between 360 – 600 HBW (ブリネル硬度).
- The higher the hardness, the greater the resistance to sliding abrasion and surface wear.
Good Toughness and Impact Strength
- Even with high hardness, AR steel must retain enough toughness to resist cracking or breaking under dynamic load or impact.
Uniform Through-Thickness Hardness
- The steel is heat-treated (焼き入れおよび焼き戻し) so that hardness is not only on the surface but throughout the entire plate.
High Tensile and Yield Strength
- Ensures the plate can bear deformation, load, and mechanical vibration without failure.
Alloy Optimization
- Alloy elements such as 炭素, マンガン, クロム, モリブデン, and boron enhance hardenability and wear resistance.
Fabrication Adaptability
- Despite high hardness, some grades are optimized for improved cutting, forming, and welding performance.

Typical Mechanical and Hardness Data

学年	硬度 (HBW)	降伏強さ (MPa)	抗張力 (MPa)	衝撃エネルギー (j, –40 °C)	Main Application
AR360 / NM360	320 – 380	900 – 1100	1000 – 1200	≥ 30	建設機械, truck bodies
AR400 / NM400	360 – 440	1000 – 1250	1200 – 1400	≥ 27	バケツ, ダンプトラックライナー, コンベア
AR450 / NM450	420 – 480	1100 – 1350	1250 – 1500	≥ 25	クラッシャー, ホッパー, フィーダー
AR500 / NM500	470 – 540	1200 – 1400	1400 – 1700	≥ 20	鉱山機械, 滝, impact zones
AR550 / NM550	520 – 580	1300 – 1500	1500 – 1750	≥ 18	High-wear pipelines, ブレード
AR600	560 – 620	1350 – 1600	1600 – 1850	≥ 15	過酷な摩耗環境

Values are nominal averages; actual performance depends on plate thickness, heat treatment, and manufacturer process.

Explanation of the Data

Hardness vs. Wear Life:
毎 50 HBW increase in hardness can extend wear life by approximately 15–25%, depending on the abrasion type and load condition.
Toughness Balance:
Although AR500 and AR600 offer better wear protection, they have lower toughness and formability than AR400, which is more suitable for fabrication-intensive applications.
衝撃エネルギー:
Higher impact energy indicates better ability to absorb shock. Grades like AR360 and AR400 are commonly used in situations combining wear and impact (例えば。, loaders and dump trucks).
構造強度:
With yield strengths above 1000 MPa, these plates can also serve as structural components, not just surface liners.

Practical Insights

滑り摩耗 (fine particles) → Choose higher hardness grades like AR500–AR600.
Impact abrasion (岩, heavy material) → Use balanced grades like AR400–AR450 for better toughness.
Mixed wear conditions → NM400 or AR450 is the most widely used compromise grade.
Ease of welding and forming → Lower hardness (AR360–AR400) performs better during fabrication.