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420 Stainless Steel Sheet Full Guide: Rawatan Haba, Kekerasan & Tooling Applications
420 kepingan keluli tahan karat ialah a keluli tahan karat martensit known for its ability to achieve high hardness through heat treatment. Ia digunakan secara meluas dalam cutlery, surgical tools, molds, and wear-resistant mechanical components where strength and edge retention are critical.
Unlike austenitic grades such as 304 dan 316, 420 stainless steel can be hardened significantly through quenching and tempering, making it a key material in tool-grade applications.
1. Apa itu 420 Keluli Tahan Karat?
| Harta benda | Ciri |
|---|---|
| Jenis keluli | Keluli tahan karat martensit |
| Ciri utama | Boleh dirawat haba, kekerasan yang tinggi |
| Rintangan kakisan | Sederhana (lower than 304/316) |
| Kemagnetan | Magnet |
420 keluli tahan karat sering dipilih apabila wear resistance and hardness are more important than maximum corrosion resistance.
2. Heat Treatment and Quenching Process
Kelebihan utama daripada 420 stainless steel is its response to heat treatment.
- Austenitizing: Heating to high temperature to prepare structure
- Pelindapkejutan: Rapid cooling to form martensite structure
- Tempering: Adjusting hardness and toughness balance
| Heat Treatment Stage | Kesan |
|---|---|
| Pelindapkejutan | Increases hardness significantly |
| Tempering | Improves toughness and reduces brittleness |
3. Hardness Levels of 420 Keluli Tahan Karat
Selepas rawatan haba yang betul, 420 stainless steel can achieve high hardness levels suitable for cutting tools.
- Keadaan anil: lebih lembut, 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. Aplikasi Biasa
| industri | Permohonan |
|---|---|
| Kutleri | Knives, bilah, kitchen tools |
| Perubatan | Alat pembedahan (non-implant critical parts) |
| Molds & tooling | Plastic molds, forming tools |
| Bahagian mekanikal | Aci, wear-resistant components |
5. 420 vs Austenitic Stainless Steel (304/316)
| Harta benda | 420 Keluli Tahan Karat | 304/316 Keluli Tahan Karat |
|---|---|---|
| Kekerasan | tinggi (selepas rawatan haba) | Sederhana |
| Rintangan kakisan | Sederhana | tinggi |
| Kebolehmesinan | Good in annealed state | Good but not hardenable |
| Penggunaan terbaik | Tools, bilah, memakai bahagian | Corrosion-resistant structures |
Ini menjadikan 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. Keupayaan Bekalan Keluli Tahan Karat Teda Ganghua
Pada Teda Ganghua, we supply high-quality stainless steel plates including 420 keluli tahan karat martensit, 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.
Terokai produk keluli tahan karat kami di sini:
Produk Plat Keluli Tahan Karat
Kesimpulan
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.
