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液壓支柱用熱軋不銹鋼復(fù)合管橋梁護(hù)欄 |
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發(fā)布者:管理員 發(fā)布時(shí)間:2009/6/29 閱讀:1575次 【字體:大 中 小】 |
1)尺寸規(guī)格和允許偏差見表1、表2。
表1液壓支柱用熱軋無縫鋼管的尺寸規(guī)格(mm)
外徑壁厚 |
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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× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
× |
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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:括號(hào)內(nèi)的外徑表示相應(yīng)的英制規(guī)格。
表2鋼管外徑和壁厚的允許偏差
鋼管尺寸/mm |
允許偏差(%) |
普通級(jí) |
較高級(jí) |
外徑 |
±1 |
±0.75 |
壁厚 |
≤20 |
±12.5 |
±10 |
>20 |
+12.5-10 | 注:1.根據(jù)需方要求,經(jīng)供需雙方協(xié)議,并在合同中注明,鋼管同一橫截面的壁厚不均應(yīng)不超過壁厚公差的80%。 2.鋼管的通常長度為3000-12000mm。 3.定尺和倍尺長度應(yīng)在通常長度范圍內(nèi),其長度允許偏差為+20mm0。每個(gè)倍尺長度應(yīng)按如下規(guī)定留出切口余量: 外徑≤159mm.....................5-10mm 外徑>159mm......................10-15mm 4.鋼管的彎曲度不大于如下規(guī)定: 壁厚≤15mm....................1.3mm/m 壁厚>15~30mm...................1.5mm/m 壁厚>30mm...................2mm/m (2)牌號(hào)和化學(xué)成分見表95。 (3)力學(xué)性能見表4。
表4液壓支柱用熱軋無縫鋼管的力學(xué)性能
牌號(hào) |
試樣熱處理制度 |
抗拉強(qiáng)度ób/MPa |
屈服點(diǎn)ó s/MPa |
伸長率δ 5(%) |
斷面收縮率(%) |
沖擊吸收功Aku2/J |
鋼管退火供應(yīng)狀態(tài)布氏硬度HBS≤ |
≥ |
20 |
|
400 |
245 |
20 |
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|
35 |
510 |
305 |
17 |
|
|
|
45 |
590 |
335 |
14 |
|
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27SiNn |
(920±20)℃水淬(450±50)℃回火冷卻劑:油或水 |
980 |
835 |
12 |
40 |
39 |
217 |
30MnNbRE |
(880±20)℃水淬(450±50)℃回火冷卻劑:空冷 |
850 |
720 |
13 |
45 |
48 |
| 注:1.鋼管以熱軋狀態(tài)交貨。需方要求以退火或調(diào)質(zhì)狀態(tài)交貨時(shí),應(yīng)在合同中注明。 2.壁厚不小于14mm鋼管應(yīng)作沖擊試驗(yàn)。 (4)用途適用于制造煤礦液壓支架和支柱的缸、柱。,
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欄目導(dǎo)航 |
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