M4 고속 강 / HS 6-5-4 / E M4 / SKH 54
- 학년 :
사양, 화학 및 기계 성능
M4 is an extremely versatile high-speed steel with its extremely high carbon and vanadium contents for exceptional abrasion-resistance. It is well suited for premium cutting tools of all types, particularly those used for machining abrasive alloys, castings and heat-treated materials. The high carbon content enables M4 steel to be hardened in excess of 65HRC. However, the high hardness and high vanadium carbide content make it more difficult to grind after heat treatment compared to M2 and other high-speed steels.
Other Known Names: HS 6-5-4, E M4, SKH 54, Stark.
물리적 특성
밀도
0.288 파운드 / 인치3 (7972 kg/m3)
비중
7.97
Modulus Of Elasticity
X 30 106 psi (207 GPa)
가공성
35-40% of a 1% carbon steel
M4 High Speed Steel Chemical Composition
| 최대 | TYPICAL | ||||||
|---|---|---|---|---|---|---|---|
| 탄소 | 크롬 | 텅스텐 | 몰리브덴 | 바나듐 | 코발트 | 소둔 된 | Tempered |
| C | Cr | W | Mo | V | Co | Hb | HrC |
| 1.3 | 4.25 | 5.85 | 4.75 | 4.1 | - | 255 | 65 |
M4 High Speed Steel Heat Treating
| 애노드 | PREHEAT | AUSTENITIZING | QUENCH | TEMPERING |
|---|---|---|---|---|
| 온도 | 온도 | 온도 | 미디엄 | 온도 |
| ° F | ° F | ° F | ° F | |
| 1550/1600 | 1500/1550 | 2175/2225 | Salt/Oil/Atm | 1025/1050 |
