|
SKD1 alloy steel round bars
|
|
Chemical Composition(%)
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
----
|
------
|
|
1.90-2.20
|
0.10-0.40
|
0.15-0.45
|
≤0.030
|
≤0.030
|
11.0-12.0
|
---
|
------
|
|
Specialty
|
|
High charcoal and chromium tool steel, have high penetration, small distortion, high rigidity, good endurance.
|
|
Use
|
|
|
|
|
|
|
|
|
1.Cold pressing mold extrusion with low pressing and burden, imprint mold, cold cutting scissor
|
|
Heat Treatment
|
|
1.Quench: 950-980`C cold oil(need re-preheat~500`C-850`C)HRC≥60
|
|
2.Eliminate stress, stabilize framework tempering, (180-200`C)≥2 hours HRC60-62
|
|
3.If it is necessary, it could be changed into 320-350`C≥2 hours backfire HRC≥60-62
|
|
4.Annealing: 780-800`C slow cooling
|
|
Melting Process
|
|
1. EAF: Electric Furnace+LF+VD(Optional)
|
|
2. ESR: Electric Furnace+LF+VD+Eleroslag Remelted(Optional)
|
|
UT Class
|
|
According to Standard of SEP 1921/84,100% Volume, Level C/c, D/d or E/e
|
|
Tolerance on Quantity
|
|
+/-10% Per Size
|
