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发布者:管理员 发布时间:2009/6/29 阅读:1572次 【字体:大 中 小】 |
1)尺寸规格和允许偏差见表1、表2。
表1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 |
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
32 |
34 |
36 |
38 |
68 |
× |
× |
× |
× |
× |
× |
× |
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76(76.1) |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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83(82.5),89(88.9) |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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95.5 |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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102(101.6),105 |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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108,114(114.3) |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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121 |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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127.133 |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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140(139.7),146 |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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152(152.4),159 |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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168(168.3) |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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180(177.8) |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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194(193.7) |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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203 |
|
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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219(219.1),224 |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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232 |
|
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
245(244.5),252 |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
273 |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
299,325(323.9) |
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× |
× |
× |
× |
× |
× |
× |
× |
X |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
355,377 |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
402 |
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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× | 注:括号内的外径表示相应的英制规格。
表2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 |
±1 |
±0.75 |
壁厚 |
≤20 |
±12.5 |
±10 |
>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.....................5-10mm 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95。 (3)力学性能见表4。
表4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 |
510 |
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。,
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