Material List
MC20
JIS standard: VC-40
Features
耐凝着、耐摩耗性が抜群の超硬素材。軟質金属(純鉄・純銅)加工用に開発した材種で低Co化、Co相の強化と特殊WCの使用により軟質金属との親和性を抑制し、優れた耐摩耗性と耐食性を有します。
MC20が搭載される設備
プレス加工機 | 切断機 |
マルチフォーミングマシン | 粉砕機 |
MC20の用途
パンチ・ダイ | ハンマー |
チャック | 切断刃 |
MC20で生産される部品
バネ | 時計部品 |
半導体PGA | 放熱板・熱交換器 |
ヒートシンク・放熱フィン | リチウムイオン電池用電極材 |
MC20の特性
耐摩耗性 | 耐腐食性 |
高:純鉄・純銅加工性 一般的負荷 ≦1.0 | ステンレス加工性 一般的負荷 ≦0.8mm |
アルミニウム加工性 重負荷 ≦2.0 | 耐凝着性 |
MC20を使用した課題解決事例
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Improvement of brass drawing die breakage
- Equipment of installation: Stamping machine
- Use: Die
- Issue: Short life Breakage
- Carbide Material: MC20
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非公開: リベットカシメ用ポンチの焼き付きの改善
- Equipment of installation: Stamping machine
- Use: Staking punch
- Issue: Short life Early seizure
- Carbide Material: MC20
- Conventional grade: G3
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非公開: 銅材+樹脂材の複合材料加工における早期摩耗の改善
- Equipment of installation: Stamping machine
- Use: Punch
- Issue: Short life Wear at an early stage
- Carbide Material: MC20 KD10
- Conventional grade: KD20
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非公開: SPCC抜き用パンチの材種変更による寿命向上 (完全非破壊での摩耗状態継続調査)
- Equipment of installation: Stamping machine
- Use: Punch
- Issue: Short life
- Carbide Material: MC20
- Conventional grade: VM-50
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非公開: SPCC絞り加工金型摩耗の改善
- Equipment of installation: Stamping machine
- Use: Die
- Issue: Short life Adhesive wear
- Carbide Material: MC20
- Conventional grade: VM-40
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非公開: 鉄系材料の焼き付きの改善
- Equipment of installation: Stamping machine
- Use: Punch
- Issue: Short life Early seizure
- Carbide Material: MC20
- Conventional grade: G3
MC20を使用した超硬製品
その他の特徴
Physical Properties
Our grades | Hardness (HRA) | Transverse rupture strength [GPa] | Co [%] |
---|---|---|---|
MC20 | 90.0 | 2.8 | 6 |
Reference: G3 | 90.0 | 2.7 | 8 |
Usual material problem
Attraction of Co in cemented carbide
from metals with high affinity to Co
▼
Displacement of Co in the cemented carbide
▼
Damage of mold
Characteristic of MC20
Reduction of Co and Selection of special WC
▼
Decreasing the high affinity of Co
Comparison of reaction to copper (Analysis of EPMA)
Above-shown photos are the cross-section surface of the test pieces which are compacted wire copper in center of MC20 and G4 after sintering and treated by HIP.
・棒グラフは銅の濃度を表します
Result;
MC20: Copper wire remains in the original position without diffusing.
G4: Copper wire has diffused in the material.
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