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試験条件 ●試験片:47±0.5HRC ●AI合金:ADC12 ●溶湯温度:700℃ ●回転数:500rpm ●試験時間:20min |
■熱膨張係数 (×10-6/℃) |
SKD61
|
KDA1S
|
KDA1
|
温度/℃
|
100
|
8.84
|
9.01 | 9.67 | |
200
|
10.31
|
10.35 | 11.11 | |
300
|
11.15 | 11.12 | 11.92 | |
400
|
11.88 | 11.78 | 12.54 | |
500
|
12.44 | 12.35 | 13.10 | |
600
|
12.90 | 12.85 | 13.61 | |
700
|
13.17 | 13.11 | 13.91 |
■熱伝導率 (cal/cm.sec.℃) |
温度/℃
|
KDA1S
|
KDA1
|
SKD61
|
30
|
0.062
|
0.069 | 0.059 | |
200
|
0.077
|
0.078 | 0.069 | |
400
|
0.075 | 0.079 | 0.068 | |
600
|
0.075 | 0.076 | 0.068 | |
700
|
0.073 | (0.075) | (0.067) | |
800
|
(0.071) | 0.074 | 0.066 |