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 
{ 
E 
9 ‘QF 
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