Prakt. Met. Sonderband 38 (2006) 311
HARDNESS AFTER TEMPERING
400
390
380
32 370 m
> 360 368
© 350
= 340
© 330
320
310
300
Poleshoe
0 Upper face @ Lower Face
Figure 6
Table IV. Hardness of poleshoes “A” and “B” after each thermal treatment
SAMPLE HB
A (N) 311
A (N +N) 390
A (N +N +WQ) | 455
A(N+N+WQ+R 264
ß (BM) 301
B (BM + N) 371
B (BM + N+ N) 381
B(BM+N+N+WQ) 525
IB(BM+N+N+WwQ+R 264
N: 1° Normalizing
N+N: 2"! Normalizing
N+WQ: Double Normalizing, followed by water Quenching.
N+N+WQ+T: Double Normalizing, followed by water Quenching and Tempering
Table V.
CHARPY TEST ISO KCV (20 °C)
Poleshoe Mean (J)
- | 13.02 | 7 -
v 12.62 12.5
11.83
-. 7
„ 18.94 Teo
18.28
TT 4381
‚u 38.09 36.4
23 44
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