|
大断面铸件
|
3.6~3.8
|
2.0~2.4
|
<0.4
|
<0.07
|
<0.03
|
0.4~1.0
|
0.2~0.4
|
不同球墨铸铁的化学成份推荐表:
|
铸铁种类
|
化学成份(质量分数,%)
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cu
|
Mo
|
Ni
|
Mg
|
RE
|
|
铁素体
|
QT400-18
|
|
2.5~3.0
|
≦0.3
|
≦0.07
|
≦0.03
|
|
|
|
0.03~0.06
|
0.02~0.04
|
|
退火
|
3.5~3.9
|
2.0~2.7
|
≦0.6
|
≦0.07
|
≦0.03
|
|
|
|
0.03~0.06
|
0.02~0.04
|
|
低温工作铸件
|
3.4~3.6
|
1.4~2.0
|
≦0.2
|
≦0.04
|
≦0.03
|
|
|
<1.0
|
0.04~0.06
|
尽量不要或≦0.03
|
|
大断面铸件
|
3.3~3.6
|
2.0~2.4
|
≦0.1
|
<0.04
|
<0.02
|
|
|
|
0.03~0.06
|
<0.03
|
|
铁+珠
|
铸态
|
3.5~3.8
|
2.2~2.5
|
≦0.4
|
<0.07
|
≦0.03
|
|
|
|
0.03~0.06
|
|
|
退火
|
3.5~3.8
|
2.0~2.5
|
≦0.6
|
≦0.07
|
≦0.03
|
|
|
|
0.04~0.06
|
|
|
珠光体
|
铸态
|
3.6~3.8
|
2.1~2.5
|
0.3~0.5
|
≦0.07
|
≦0.03
|
0.5~1.0
|
0~0.2
|
|
0.03~0.06
|
0.02~0.04
|
|
热处理
|
3.5~3.7
|
2.0~2.4
|
0.4~0.8
|
≦0.07
|
≦0.03
|
0~1.0
|
0~0.2
|
|
0.05~ 0.08
|
0.02~0.04
|
|
大断面铸件
|
3.6~3.8
|
2.0~2.4
|
<0.4
|
<0.07
|
<0.03
|
0.4~1.0
|
0.2~0.4
|
| |