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砂型铸造灰铸铁化学成份参考数据(%)
|
牌号 |
铸件主要 壁厚(mm) |
C |
Si |
Mn |
P |
S |
|
HT100 |
－ |
3.2~3.8 |
2.1~2.7 |
0.5~0.8 |
<0.5 |
≤0.15 |
|
HT150
|
<15 |
3.3~3.7 |
2.0~2.4 |
0.5~0.8 |
<0.2 |
≤0.12 |
|
15~30 |
3.2~3.6 |
2.0~2.4 |
0.5~0.8 |
<0.2 |
≤0.12 |
|
30~50 |
3.1~3.5 |
1.9~2.2 |
0.5~0.8 |
<0.2 |
≤0.12 |
|
>50 |
3.0~3.4 |
1.8~2.1 |
0.5~0.8 |
<0.2 |
≤0.12 |
|
HT200
|
<15 |
3.2~3.6 |
1.9~2.2 |
0.6~0.9 |
<0.15 |
≤0.12 |
|
15~30 |
3.1~3.5 |
1.8~2.1 |
0.7~0.9 |
<0.15 |
≤0.12 |
|
30~50 |
3.0~3.4 |
1.5~1.8 |
0.8~1.0 |
<0.15 |
≤0.12 |
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>50 |
3.0~3.2 |
1.4~1.7 |
0.8~1.0 |
<0.15 |
≤0.12 |
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HT250
|
<15 |
3.2~3.5 |
1.8~2.1 |
0.7~0.9 |
<0.15 |
≤0.12 |
|
15~30 |
3.1~3.4 |
1.6~1.9 |
0.8~1.0 |
<0.15 |
≤0.12 |
|
30~50 |
3.0~3.3 |
1.5~1.8 |
0.8~1.0 |
<0.15 |
≤0.12 |
|
>50 |
2.9~3.2 |
1.4~1.7 |
0.9~1.1 |
<0.15 |
≤0.12 |
|
HT300
|
<15 |
3.1~3.4 |
1.5~1.8 |
0.8~1.0 |
<0.15 |
≤0.12 |
|
15~30 |
3.0~3.3 |
1.4~1.7 |
0.8~1.0 |
<0.15 |
≤0.12 |
|
30~50 |
2.9~3.2 |
1.4~1.7 |
0.9~1.1 |
<0.15 |
≤0.12 |
|
>50 |
2.8~3.1 |
1.3~1.6 |
1.0~1.2 |
<0.15 |
≤0.12 |
|
HT300
|
<15 |
2.9~3.2 |
1.4~1.7 |
0.9~1.2 |
<0.15 |
≤0.12 |
|
15~30 |
2.8~3.1 |
1.3~1.6 |
1.0~1.3 |
<0.15 |
≤0.12 |
|
30~50 |
2.8~3.1 |
1.2~1.5 |
1.0~1.3 |
<0.15 |
≤0.12 |
|
>50 |
2.7~3.0 |
1.1~1.4 |
1.1~1.4 |
<0.15 |
≤0.12 | |
根据国家标准GB1348-88,球墨铸铁牌号按其单铸试块的力学性能分为八个牌号.
|
牌号 |
抗拉
强度 |
屈服点 |
伸长率 |
供参考 |
|
硬度(HBS) |
主要金相组织 |
|
QT400-18 |
400 |
250 |
18 |
130-180 |
铁素体 |
|
QT400-15 |
400 |
250 |
15 |
130-180 |
铁素体 |
|
QT450-10 |
450 |
310 |
10 |
160-210 |
铁素体 |
|
QT500-7 |
500 |
320 |
7 |
170-230 |
铁素体+珠光体 |
|
QT600-3 |
600 |
370 |
3 |
190-270 |
珠光体+铁素体 |
|
QT700-2 |
700 |
420 |
2 |
225-305 |
珠光体 |
|
QT800-2 |
800 |
480 |
2 |
245-335 |
珠光体或回火组织 |
|
QT900-2 |
900 |
480 |
2 |
280-360 |
贝氏体或回火马氏体 | |
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