- 説明
420 Stainless Steel Sheet Full Guide: 熱処理, 硬度 & Tooling Applications
420 stainless steel sheet is a マルテンサイト系ステンレス鋼 known for its ability to achieve high hardness through heat treatment. 広く使用されています cutlery, surgical tools, molds, and wear-resistant mechanical components where strength and edge retention are critical.
Unlike austenitic grades such as 304 そして 316, 420 stainless steel can be hardened significantly through quenching and tempering, making it a key material in tool-grade applications.
1. とは何ですか 420 ステンレス鋼?
| 財産 | Characteristic |
|---|---|
| 鋼種 | マルテンサイトステンレス鋼 |
| Main feature | 熱処理可能, 高硬度 |
| 耐食性 | 適度 (lower than 304/316) |
| 磁気 | 磁気 |
420 stainless steel is often selected when wear resistance and hardness are more important than maximum corrosion resistance.
2. Heat Treatment and Quenching Process
The key advantage of 420 stainless steel is its response to heat treatment.
- Austenitizing: Heating to high temperature to prepare structure
- 焼入れ: Rapid cooling to form martensite structure
- テンパリング: Adjusting hardness and toughness balance
| 熱処理ステージ | 効果 |
|---|---|
| 焼入れ | Increases hardness significantly |
| テンパリング | Improves toughness and reduces brittleness |
3. Hardness Levels of 420 ステンレス鋼
適切な熱処理後, 420 stainless steel can achieve high hardness levels suitable for cutting tools.
- 焼きなまし状態: softer, easier to machine
- Hardened condition: high wear resistance
- Typical hardness range: varies based on tempering process
This flexibility makes it ideal for precision tool manufacturing.
4. 代表的な用途
| 業界 | 応用 |
|---|---|
| カトラリー | Knives, ブレード, kitchen tools |
| 医学 | 手術器具 (non-implant critical parts) |
| Molds & tooling | Plastic molds, forming tools |
| 機械部品 | シャフト, wear-resistant components |
5. 420 vs Austenitic Stainless Steel (304/316)
| 財産 | 420 ステンレス鋼 | 304/316 ステンレス鋼 |
|---|---|---|
| 硬度 | 高い (熱処理後) | 適度 |
| 耐食性 | 適度 | 高い |
| 被削性 | Good in annealed state | Good but not hardenable |
| Best use | ツール, ブレード, wear parts | Corrosion-resistant structures |
これにより、 420 the preferred choice when mechanical strength and edge retention are more important than corrosion resistance.
6. Processing and Machining Considerations
- Machine in annealed condition before hardening
- Avoid excessive heat during grinding
- Use controlled quenching to prevent cracking
- Polishing improves corrosion resistance slightly
7. 泰達江華ステンレス鋼供給能力
で 泰達江華, we supply high-quality stainless steel plates including 420 マルテンサイト系ステンレス鋼, suitable for tooling, industrial blades, and wear-resistant applications.
We also provide precision cutting, heat-treatment support coordination, and custom fabrication services to meet industrial production requirements.
ステンレス製品はこちらからご覧ください:
ステンレス板製品
結論
420 stainless steel sheet is a high-hardness, heat-treatable material designed for cutting tools and wear-resistant applications. With proper heat treatment, it delivers excellent performance in mechanical and tooling industries where strength is the top priority.
