DF-3 Sweden Assab cold die steel
DF-3 is a cold applied to a variety of occasions, manganese - chromium - tungsten tool steel commonly used oil-offend. Its features are:
Excellent mechanical processing
When hardened, excellent dimensional stability
Hardened and tempered by the high surface hardness and good toughness with body
These combined features make the DF-3 made a good tool or die life and economic benefits.
DF-3 Sweden Assab cold die steel
DF-3 is a cold applied to a variety of occasions, manganese - chromium - tungsten tool steel commonly used oil-offend. Its features are:
Excellent mechanical processing
When hardened, excellent dimensional stability
Hardened and tempered by the high surface hardness and good toughness with body
These combined features make the DF-3 made a good tool or die life and economic benefits.
|
Chemical composition |
C
0.95 |
Mn
1.1 |
Cr
0.6 |
W
0.6 |
V
0.1 |
|
Standards |
AISIO1， W.-Nr.1.2510 | ||||
|
Factory state |
Soft annealing to 190HB hardness of about | ||||
|
Identify the color |
Yellow | ||||
Use
|
Die for: material thickness to be machined |
HRC |
|
Cutting Punching, punching, less than 3 mm Perforated, cut, 3-6 mm Cutting, trimming, 6-10 mm Cut cut |
60-62
56-60
54-56 |
|
Cold cut short Forging and trimming thermal cut off Cold cut die dressing |
54-60
58-60
56-58 |
|
Forming: Bending, forming, stretching, curling, Spinning Small pressure die Gauge, measuring Turning Thimble Guide bush, ejector Small / medium drill and tap Small gears, pistons, mouth, cam |
56-62
56-60
58-62 |
Performance
|
Temperature |
20°C |
200°C |
400°C |
|
Density kg/m3 |
7800 |
7750
|
7750
|
|
Coefficient of elasticity N/mm2 |
190 000 |
185 000 |
170 000 |
|
Coefficient of thermal expansion From 20 ° C / ° C |
–
|
11.7 x 10-6 |
11.40-6
|
|
Thermal conductivity W / m ° C |
32 |
33 |
34 |
|
Specific heat J / Kg ° C |
460 |
- |
- |
Hardened, and tempered to 62HRC hardness test at room temperature and high temperature physical properties.
Approximation:
Approximation:
|
Hardness of HRC |
Compressive yield strength Rc0.2N/mm2 |
|
62 |
2200 |
|
60 |
2150 |
|
55 |
1800 |
|
50 |
1350 |
Heat treatment
Soft annealing
Under protective atmosphere, heated to 780 ° C, all heat, 15 ° C per hour furnace cooling to 650 ° C, then cooled.
Eliminate stress
After rough machining, the mold should be heated to 650 ° C, both thermal insulation for two hours, slowly cooled to 500 ° C, then cooled.硬化（淬硬）处理
Preheat temperature :600-750 ° C
Austenitizing temperature :790-850 ° C
Austenitizing temperature :790-850 ° C
|
Austenitizing temperature, ° C |
Holding time * Minute |
Hardness after quenching HRC |
|
800 |
30 |
大约65 |
|
825 |
20 |
大约65 |
|
850 |
15 |
大约63 |
