液压支柱用热轧无缝钢管(GB/T17396—1998)
2008-01-31 09:38 来源: 我的钢铁
(1)尺寸规格和允许偏差见表6-93、表6-94。
表6-93液压支柱用热轧无缝钢管的尺寸规格 (mm)
外径壁厚
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
2l
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
32
|
34
|
36
|
38
|
68
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
76(76.1)
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
83(82.5),89(88.9)
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
95.5
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
102(101.6),105
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
108,114(114.3)
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
12l
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
127.133
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
140(139.7),146
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
152(152.4),159
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
|
|
|
168(168.3)
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
180(177.8)
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
194(193.7)
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
|
203
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
|
|
|
|
|
219(219.1),224
|
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
|
|
|
232
|
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
245(244.5),252
|
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
273
|
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
299,325(323.9)
|
|
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
X
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
355,377
|
|
|
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
402
|
|
|
|
|
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
×
|
注:括号内的外径表示相应的英制规格。
表6-94钢管外径和壁厚的允许偏差
钢管尺寸/mm
|
允许偏差(%)
|
||
普通级
|
较高级
|
||
外径
|
±l
|
±O.75
|
|
壁厚
|
≤20
|
±12.5
|
±lO
|
>20
|
+12.5
-10
|
注:1.根据需方要求,经供需双方协议,并在合同中注明,钢管同一横截面的壁厚不均应不超过壁厚公差的80%。
2.钢管的通常长度为3000—12000mm。
3.定尺和倍尺长度应在通常长度范围内,其长度允许偏差为+20mm0。每个倍尺长度应按如下规定留出切口余量:
外径≤159mm………………………………………………………5一lOmm
外径>159mm………………………………·…………………··10—15mm
4.钢管的弯曲度不大于如下规定:
壁厚≤15mm……………………………………………………1.3mm/m
壁厚>15~30mm…………………………………………………1.5mm/m
壁厚>30mm…………………………………………………2mm/m
(2)牌号和化学成分见表6_95。
表6-95液压支柱用热轧无缝钢管的牌号和化学成分
牌号
|
化学成分(质量分数)(%)
|
|||||||||
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ni
|
Cu
|
Nb
|
RE(加入量)
|
|
≤
|
||||||||||
20
|
0.17~0.24
|
0.17~0.37
|
O.35~0.65
|
0.035
|
0.035
|
0.25
|
O.25
|
0.20
|
|
|
35
|
0.32~0.40
|
O.17~O.37
|
O.50~O.80
|
O.035
|
O.035
|
O.25
|
O.25
|
O.20
|
|
|
45
|
0.42~0.50
|
O.17~O.37
|
O.50~O.80
|
O.035
|
0.035
|
0.25
|
O.25
|
0.20
|
|
|
27SiMn
|
O.24~O.32
|
1.10~1.40
|
1.10~1.40
|
0.035
|
0.035
|
0.030
|
0.030
|
0.030
|
|
|
30MnNBRE
|
0.27~O.36
|
O.20~0.60
|
1.20~1.60
|
0.035
|
0.035
|
0.030
|
0.030
|
0.030
|
0.020~0.050
|
0.02~O.04
|
(3)力学性能见表6-96。
表6-96液压支柱用热轧无缝钢管的力学性能
牌号
|
试样热处理制度
|
抗拉强度
ób/MPa
|
屈服点
ó s/MPa
|
伸长率
δ 5(%)
|
断面收缩率
(%)
|
冲击吸收功
Aku2/J
|
钢管退火供应状态
布氏硬度HBS≤
|
≥
|
|||||||
20
|
|
400
|
245
|
20
|
|
|
|
35
|
5lO
|
305
|
17
|
|
|
|
|
45
|
590
|
335
|
14
|
|
|
|
|
27SiNn
|
(920±20)℃水淬
(450±50)℃回火
冷却剂:油或水
|
980
|
835
|
12
|
40
|
39
|
217
|
30MnNbRE
|
(880±20)℃水淬
(450±50)℃回火
冷却剂:空冷
|
850
|
720
|
13
|
45
|
48
|
|
注:1.钢管以热轧状态交货。需方要求以退火或调质状态交货时,应在合同中注明。
2.壁厚不小于14mm钢管应作冲击试验。
(4)用途适用于制造煤矿液压支架和支柱的缸、柱。