铸件

灰铁铸造的冷却时间是多少?

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灰铁铸造的冷却时间是多少?
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T = K * M ² ——凝固时间 = 凝固系数 × 模数的平方
T——凝固时间,单位:分钟
K——凝固系数,单位:分钟/厘米²
M——铸件模数,单位:厘米
至于K值的取值,如下:
铸钢:K=2.0~2.1
铸铁
浇注温度 1300 1350 1400 1450
灰铸铁 4.0~4.4 4.3~4.7 4.7~5.2 4.8~5.4
球体 5.0~5.5 5.4~5.9 5.5~6.0 5.6~6.2
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至少铸件要冷却到暗红色、几乎看不出来。复杂件、易变性的等等更要晚一点
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