CN1307202A - High-strength steel gas cylinder - Google Patents
High-strength steel gas cylinder Download PDFInfo
- Publication number
- CN1307202A CN1307202A CN 00110094 CN00110094A CN1307202A CN 1307202 A CN1307202 A CN 1307202A CN 00110094 CN00110094 CN 00110094 CN 00110094 A CN00110094 A CN 00110094A CN 1307202 A CN1307202 A CN 1307202A
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- Prior art keywords
- gas cylinder
- bottle
- steel gas
- steel
- high tensile
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Abstract
High strength steel cylinder is made of material with chemical components of (in wt%): C 0.30-0.34, Si 0.20-0.35, Mn 0.50-0.70, P less than or equal 0.015, S less than or equal 0.010, Cr 0.90-1.10, Ni 1.60-1.90, Mo 0.65-0.80, V 0.08-0.15, P+S less than or equal 0.020 and Fe (the balance). It is used in air respirator for fire fighting and other field, and has high strength and light weight.
Description
The present invention relates to pressurized container, it is mainly used in the air respiratorresuscitator of industry uses such as assembling fire-fighting to provide utilization Metal Forming technology to make the high tensile steel gas cylinder especially, and filling medium is pressurized air.Also can fill oxygen, nitrogen or inert gas when being used for other field.
From the technical performance opinion, air respiratorresuscitator is weight reduction as much as possible under the identical prerequisite of gas-storing capacity to the outstanding request of gas cylinder.With the fire-fighting operation is example, reduces fireman's physical consumption, increases the activity duration in the scene of a fire, is significant for inherently safe that guarantees the fireman and raising fire extinguishing mitigation ability.At present air respiratorresuscitator uses mostly is 30CrMo or 35CrMo steel gas cylinder, though intensity and toughness index can satisfy existing technical standard requirement, weight is not light.
The object of the present invention is to provide a kind of high tensile steel seamless gas cylinder, it is mainly used in the air respiratorresuscitator of industry uses such as assembling fire-fighting, the intensity height, and in light weight.
The invention provides a kind of high tensile steel gas cylinder, it is characterized in that the chemical composition of this steel gas cylinder is: C0.30-0.34, Si 0.20-0.35, Mn 0.50-0.70, P≤0.015, S≤0.010, Cr 0.90-1.10, Ni 1.60-1.90, Mo 0.65-0.80, V 0.08-0.15, P+S≤0.020.
The preparation of high tensile steel gas cylinder of the present invention can be adopted following three kinds of methods:
A raw material steel pipe → pipe annealing → machining → (spinning) → heat receive the end → heat receipts mouth → machining → quenching and tempering → cover coat
B raw steel → slab annealing → machining → punching press → (drawing or spinning) → heat is received mouth → machining → quenching and tempering → cover coat
C raw bar material → excellent base annealing → extrusion moulding → (drawing or spinning) → heat is received mouth → machining → quenching and tempering → cover coat
Whether adopt the operation in the bracket in above-mentioned three kinds of technologies, can be according to the decision of technological equipment situation, relevant process parameter is:
1, blank anneal
Annealing temperature is 680 ± 10 ℃, and holding time should be not less than 6 hours, cools to the furnace below 300 ℃ and comes out of the stove.
Annealing back material hardness should be HRC≤28.
2, bottle quenches and tempering heat treatment
A quenches
Bottle kept 60 minutes at 870 ± 10 ℃, went into cooling in the oil then or cooled off in rate of cooling is not more than the quenching medium of 80% water cooling speed.
The b tempering
Bottle is at 600 ± 10 ℃ of insulations air cooling of coming out of the stove after 120 minutes.
C quenches and the holding time of tempering should change above-mentioned time For Information Only with loading volume.
Bottle tempering as early as possible after d quenches, the stand-by period in air at room temperature should be not more than 30 minutes.
3, mechanical property guarantee value after the bottle heat treatment
Mechanical property after the bottle heat treatment should be not less than numerical value shown in the table 1.
Guarantee value after the heat treatment of table 1 bottle
| σ bMPa | ??σ 0.2MPa | ?δ 5％ | ????-50℃??a kv????J/cm 2 |
| ?≥1250 | ??≥1100 | ??≥12 | ???????????≥60 |
The international standard ISO/DIS9809-2 that ISO (International Standards Organization) is about to pass through " tensile strength is more than or equal to the movable seamless steel gas cylinder design of the Q-tempering of 1100MPa, manufacturing and check " has positive effect for the technological progress of high tensile steel gas cylinder.China only is applicable to that at present intensity is not more than the gas cylinder standard GB5099-94 " seamless steel gas cylinder " of 1100MPa.For the low pressure that prevents gas cylinder is destroyed and low-cycle fatigue failure, above-mentioned two standards have all been stipulated bottle hydraulic bursting test and cyclic fatigue test.
The key problem in technology of high tensile steel seamless gas cylinder provided by the present invention has been to use a kind of novel high tensile steel, well-known intensity height, poor toughness, cracking resistance line expansion capability are low, being the deadly defect of high tensile steel, is the basic reason that the high tensile steel gas cylinder produces low pressure explosion and low-cycle fatigue failure.
Bursting pressure P when GB5099 and ISO/DIS9809-2 stipulate the bottle hydraulic bursting test
bShould be not less than 1.6 times of hydraulic test pressure P
h, i.e. P
b〉=1.6P
hDuring the cyclic fatigue test, the cocycle pressure of test can be nominal operating pressure P
w, also can be hydraulic test pressure P
h(P
h=1.5P
w), following circulating pressure is 10% of a cocycle pressure, and can not be greater than 3MPa.When cocycle pressure was nominal operating pressure, 80000 circulations of bottle experience did not destroy to qualified, and when cocycle pressure was hydraulic test pressure, 12000 circulations of bottle experience did not destroy to qualified.Such requirement is difficult to reach for the intensity of the ISO/DIS9809-2 regulation gas cylinder more than or equal to 1100MPa.But because high tensile steel of the present invention has the obdurability matched well, smoothly by the test of bottle cyclic fatigue.
In order to remove the worry of people to the high tensile steel gas cylinder safely, ISO/DIS9809-2 also requires axially to carry out cyclic fatigue test and bursting test after bottle wall outer surface cutting-give system ARTIFICIAL CRACK along bottle, and this regulation is the baptism to gas cylinder safely.The high tenacity of high tensile steel of the present invention makes the steel cylinder body with given size ARTIFICIAL CRACK satisfy the requirement of bursting test and fatigue test.
In addition, high tensile steel gas cylinder of the present invention is because steel matter intensity height, the good toughness of selecting for use is not less than in the other technologies index under the situation of CrMo steel cylinder body, and it is very light that weight can become, and is example with 6 litre flasks, can alleviate more than the 2kg.
In a word, the present invention compares 32CrNi with domestic 35CrMo steel gas cylinder
2MoV steel gas cylinder has the high advantage of intensity, but plasticity of the two (δ value) and impact toughness (a
kValue) close, the safety reliability in the use is also about the same, and importantly bottle weight saving is more than 1/5.With overseas-built tensile strength is that the high strength steel cylinder of 1100-1400MPa is compared 32CrNi
2The MoV steel cylinder is the intensity height not only, and toughness is better, and is safe and reliable, and bottle weight also reduces slightly.Below by embodiment in detail the present invention is described in detail.
Embodiment
The 30CrNiMo that external product is made with German Mannesmann Steel tube Co., Ltd May nineteen ninety-five
8The high strength steel cylinder is an example, and chemical composition, technical performance and the contrast of mechanical property measured value of product is as follows:
Table 2 bottle material chemical composition w%
| Material trademark | Chemical composition | ||||||||
| ????C | ????Si | ????Mn | ????P | ????S | ????Cr | ????Ni | ????Mo | ????V | |
| 35CrMo | ????0.34 | ????0.24 | ????0.51 | ????0.020 | ????0.011 | ????0.95 | ????0.20 | ||
| Moral 30CrNiMo 8 | ????0.30 | ????0.24 | ????0.47 | ????0.013 | ????0.003 | ????1.95 | ????1.94 | ????0.35 | |
| 32CrNi 2MoV-1 | ????0.31 | ????0.29 | ????0.65 | ????0.010 | ????0.003 | ????1.05 | ????1.78 | ????0.66 | ????0.12 |
| 32CrNi 2MoV-2 | ????0.32 | ????0.24 | ????0.67 | ????0.008 | ????0.007 | ????1.05 | ????1.68 | ????0.72 | ????0.14 |
| 32CrNi 2MoV-3 | ????0.32 | ????0.24 | ????0.66 | ????0.011 | ????0.003 | ????0.96 | ????1.65 | ????0.79 | ????0.11 |
Table 3 bottle technical performance
| Material trademark | Nominal outside diameter mm | Working pressure MPa | Actual volume L | Actual wall thickness mm | Actual weight kg | Fill medium | Environmental Conditions temperature ℃ |
| ????35CrMo | ????140 | ????30 | ????6.20 | ????4.9 | ????9.3 | Air | ????-40-60 |
| Moral 30CrNiMo8 | ????140 | ????30 | ????6.00 | ????4.2 | ????7.5 | Air | ????-40-60 |
| 32CrNi 2MoV-1 | ????140 | ????30 | ????6.20 | ????3.8 | ????7.2 | Air | ????-40-60 |
| 32CrNi 2MoV-2 | ????140 | ????30 | ????6.19 | ????3.8 | ????7.2 | Air | ????-40-60 |
| 32CrNi 2MoV-3 | ????140 | ????30 | ????6.21 | ????3.8 | ????7.2 | Air | ????-40-60 |
Table 4 bottle mechanical properties of materials
| Material trademark | σ bMPa | ?σ 0.2MPa | ???δ 5％ | ??????-50℃a kvJ/cm 2 |
| ?35CrMo | ????1030 | ????950 | ????14.0 | ?????????66.8 |
| Moral 32CrNiMo8 | ????1180 | ????1060 | ????14.0 | ?????????29.0 |
| 32CrNi 2MoV-1 | ????1300 | ????1260 | ????14.0 | ?????????82.8 |
| 32CrNi 2MoV-2 | ????1300 | ????1230 | ????14.6 | ?????????70.4 |
| 32CrNi 2MoV-3 | ????1330 | ????1280 | ????14.0 | ?????????75.2 |
Claims (2)
1, a kind of high tensile steel gas cylinder is characterized in that the chemical composition of this steel gas cylinder is: C 0.30-0.34, Si 0.20-0.35, Mn 0.50-0.70, P≤0.015, S≤0.010, Cr 0.90-1.10, Ni 1.60-1.90, Mo 0.65-0.80, V 0.08-0.15, P+S≤0.020.
2, the described high tensile steel gas cylinder of claim 1 is used to assemble the air respiratorresuscitator of industry uses such as fire-fighting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110094 CN1307202A (en) | 2000-01-31 | 2000-01-31 | High-strength steel gas cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110094 CN1307202A (en) | 2000-01-31 | 2000-01-31 | High-strength steel gas cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1307202A true CN1307202A (en) | 2001-08-08 |
Family
ID=4580114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00110094 Pending CN1307202A (en) | 2000-01-31 | 2000-01-31 | High-strength steel gas cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1307202A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818309A (en) * | 2010-04-22 | 2010-09-01 | 山西太钢不锈钢股份有限公司 | Air bottle steel and manufacturing method thereof |
| CN102277534A (en) * | 2011-07-29 | 2011-12-14 | 攀钢集团有限公司 | Hot rolled steel section for gas cylinders and production method thereof |
| CN102588734A (en) * | 2012-03-06 | 2012-07-18 | 姜将 | Manufacturing process of metal bottle with air-tight seal |
| CN104532142A (en) * | 2014-10-27 | 2015-04-22 | 内蒙古北方重工业集团有限公司 | 40CrNi3MoV standard material |
-
2000
- 2000-01-31 CN CN 00110094 patent/CN1307202A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818309A (en) * | 2010-04-22 | 2010-09-01 | 山西太钢不锈钢股份有限公司 | Air bottle steel and manufacturing method thereof |
| CN102277534A (en) * | 2011-07-29 | 2011-12-14 | 攀钢集团有限公司 | Hot rolled steel section for gas cylinders and production method thereof |
| CN102277534B (en) * | 2011-07-29 | 2012-12-12 | 攀钢集团有限公司 | Hot rolled steel section for gas cylinders and production method thereof |
| CN102588734A (en) * | 2012-03-06 | 2012-07-18 | 姜将 | Manufacturing process of metal bottle with air-tight seal |
| CN102588734B (en) * | 2012-03-06 | 2014-01-22 | 沈阳斯林达安科新技术有限公司 | Manufacturing process of metal bottle with air-tight seal |
| CN104532142A (en) * | 2014-10-27 | 2015-04-22 | 内蒙古北方重工业集团有限公司 | 40CrNi3MoV standard material |
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