钢件加热时间计算表

炉型

工件形状

圆柱

板

薄管
(d/D<1/4,l/D<20)

厚管
(d/D≥1/4)

盐浴炉

K/min·mm-1

0.7

0.7

0.7

1.0

W/mm

(0.167～0.25)D

(0.167～0.5)B

(0.25～0.5)d

(0.25～0.5)d

KW/min

(0.117～0.175)D

(0.117～0.35)B

(0.175～0.35)d

(0.25～0.5)d

空气炉

K/min·mm-1

3.5

4

4

5

W/mm

(0.167～0.25)D

(0.167～0.5)B

(0.25～0.5)d

(0.25～0.5)d

KW/min

(0.6～0.9)D

(0.6～2)B

(1～2)d

(1.25～2.5)d

备 注

l/D值大取上限，否则取下限

H，l/B值大取上限，否则取下限

l/d值大取上限，否则取下限

l/d值大取上限，否则取下限

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