CN105002445A - 4130X seamless steel pipe for manufacturing of vehicle-mounted high-pressure gas cylinder and preparation method of 4130X seamless steel pipe - Google Patents
4130X seamless steel pipe for manufacturing of vehicle-mounted high-pressure gas cylinder and preparation method of 4130X seamless steel pipe Download PDFInfo
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Abstract
The invention discloses a 4130X seamless steel pipe for manufacturing of a vehicle-mounted high-pressure gas cylinder. The 4130X seamless steel pipe comprises the following chemical constituents in percentage by mass: 0.28-0.34% of C, 0.15-0.35% of Si, 0.7-0.9% of Mn, 0.95-1.10% of Cr, 0.20-0.25% of Mo, 0.010-0.040% of Al, less than or equal to 0.020% of P, less than or equal to 0.010% of S, less than or equal to 0.18% of Ni, less than or equal to 0.20% of Cu, less than or equal to 0.035% of As, Sn, Sb, Bi and Pb, and the balance of Fe and micro impure elements. The invention further provides a preparation method of the 4130X seamless steel pipe. The 4130X seamless steel pipe produced according to the preparation method meets the requirements of the vehicle-mounted high-pressure gas cylinder for high strength, high ductility and low yield ratio of a pipe body material; moreover, the production efficiency of the 4130X seamless steel pipe is high, and the metal consumption is low.
Description
Technical field
The present invention relates to metallurgical technology field, be specifically related to a kind of 4130X weldless steel tube for the manufacture of on-board high-voltage gas cylinder and preparation method thereof.
Background technology
Sweet natural gas is a kind of high-quality and efficient energy, is the most ideal fuels of environment protection.Natural gas reserves enriches simultaneously, is the desirable substitute energy of oil.Along with the development of globalization of world economy, the status expanding day of Sweet natural gas in energy structure, alleviates energy shortage situation effectively.
Increase severely with Sweet natural gas warehousing and transportation facilities market, quick, the efficient and convenient conveying how realizing gas becomes the focus of industrial gasses industry concern, and especially Special high-voltage gas cylinder (as CNG gas cylinder), ultra-high voltage gas cylinder become development trend.
The present invention aims to provide a kind of production method for the manufacture of on-board high-voltage gas cylinder 4130X weldless steel tube.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of 4130X weldless steel tube for the manufacture of on-board high-voltage gas cylinder.
To achieve these objectives, a kind of 4130X weldless steel tube for the manufacture of on-board high-voltage gas cylinder of the present invention, its chemical composition mass percent is:: C 0.28 ~ 0.34%, Si 0.15 ~ 0.35%, Mn 0.7 ~ 0.9%, Cr 0.95 ~ 1.10%, Mo 0.20 ~ 0.25%, Al 0.010 ~ 0.040%, P≤0.020%, S≤0.010%, Ni≤0.18, Cu≤0.20, As+Sn+Sb+Bi+Pb≤0.035%, all the other are iron and micro impurity element.
Further: the chemical composition mass percentage of described a kind of 4130X weldless steel tube for the manufacture of on-board high-voltage gas cylinder is: C 0.290%, Si 0.270%, Mn 0.740%, P 0.011%, S 0.002%, Cr 1.00%, Mo 0.220%, Al 0.024%, all the other are iron and micro impurity element.
The preparation method of a kind of 4130X weldless steel tube for the manufacture of on-board high-voltage gas cylinder that the present invention solves.A kind of for the manufacture of on-board high-voltage gas cylinder 4130X weldless steel tube by present method preparation, modified rear body yield strength: 574Mpa ~ 673Mpa, tensile strength: 687Mpa ~ 792Mpa, yield tensile ratio≤0.85%,-60 DEG C of summers than v-notch (longitudinal direction) apparatus with shock absorbing: 110J ~ 170J, hardness: 220HBW ~ 250HBW.
Technical scheme of the present invention is as follows:
For the manufacture of a preparation method for on-board high-voltage gas cylinder 4130X weldless steel tube, comprising: smelt production, Rolling Production process and steel heat treatment process.
Further, described steelmaking process comprises the degassed and round billet continuous casting of hot metal pretreatment, converter smelting, LF refining, VD, converter smelting molten iron all adopts pre-desulphurised hot metal, molten iron requires S≤0.05%, P≤0.12%, final deoxygenation adopts aluminium deoxidation, terminal temperature >=1630 DEG C, LF refining requires omnidistance normal Argon, adopt from low several grades to height number grade heating mode, the dark vacuum≤0.10Kpa of VD vacuum outgas, dark vacuum >=13 minute, the VD later stage feeds 200m silicon-calcium wire, ensure after line feeding soft blow time >=15min.Pulling speed of continuous casting controls at 0.35m/min, superheating temperature≤30 DEG C of molten steel.
Further, the operation of rolling of described steel comprises the heating of round base, perforation, tube rolling, sizing, cold bed cooling, flaw detection, the heating of circle base adopts preheating section, heating zone, soaking zone Segmented heating, preheating temperature controls at 980 DEG C-1150 DEG C, heating zone controls at 1100 DEG C-1280 DEG C, soaking zone controls at 1240 DEG C-1290 DEG C, tube rolling temperature controls at 1150 DEG C-1200 DEG C, tension reducing temperature >=850 DEG C, then cold bed cooling, cold bed adopts solid matter retarded cooling process, more than 650 DEG C, rate of cooling≤0.50 DEG C/s, then carry out steel tube flaw detection.
Further, roll the thermal treatment process of state steel pipe, adopt quenching+tempering hardening and tempering process, quenchant is water, and quenching temperature is 880 DEG C, insulation 40min, and tempering temperature is 690 DEG C ~ 730 DEG C, insulation 90min.
One of the present invention is as follows for the manufacture of on-board high-voltage gas cylinder 4130X weldless steel tube preparation method technique effect:
The one of preparation is for the manufacture of on-board high-voltage gas cylinder 4130X weldless steel tube, modified rear body yield strength: 574Mpa ~ 673Mpa, tensile strength: 687Mpa ~ 792Mpa, yield tensile ratio≤0.85%,-60 DEG C of summers than v-notch (longitudinal direction) apparatus with shock absorbing: 110J ~ 170J, hardness: 220HBW ~ 250HBW.Modified rear material has good over-all properties, can ensure the security of materials'use.
Embodiment
Below in conjunction with embodiment, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
Smelt production comprises hot metal pretreatment, require S≤0.05%, P≤0.12%, ensure that inclusion content of steel is in lower level, final deoxygenation adopts converter smelting, LF refining, degassed and the round billet continuous casting of VD, converter smelting all adopts pre-desulphurised hot metal, molten iron has aluminium deoxidation, reduce gas particularly oxygen level in steel, terminal temperature >=1630 DEG C, LF refining requires omnidistance normal Argon, adopt from low several grades to height number grade heating mode, dark vacuum≤the 0.10Kpa of VD, dark vacuum >=13 minute, the VD later stage feeds 200m silicon-calcium wire, make the inclusion energy fully sex change in steel, ensure after line feeding soft blow time >=15min makes inclusion fully float.Continuous casting adopts horizontal pulling rate, controls at 0.35m/min, superheating temperature≤30 DEG C of molten steel.
The operation of rolling of steel comprises the heating of round base, perforation, tube rolling, open tube reducing, cold bed cools, flaw detection, heating of pipe blank adopts preheating section, heating zone, soaking zone Segmented heating, strict control furnace temperature, homogeneous temperature rises, preheating temperature controls at 980 DEG C-1150 DEG C, heating zone controls at 1100 DEG C-1280 DEG C, soaking zone controls at 1240 DEG C-1290 DEG C, ensure that heating materials uniform well-burnt again can burning, tube rolling temperature controls at 1150 DEG C-1200 DEG C, ensure that the rolling of steel pipe is in the best temperature range of material plasticity, resistance to deformation is little, tension reducing temperature >=850 DEG C, be equivalent to material and carry out a normalizing, do tissue for follow-up thermal treatment to prepare.Then cold bed adopts solid matter retarded cooling process, more than 650 DEG C, it is interval that rate of cooling≤0.50 DEG C/s, Shi Gangzhong tissue inter-variable occurs in ferrite ten pearlite transformation.
Heat Treatment Of Steel process, adopt quenching+tempering hardening and tempering process, quenchant is water, and quenching temperature is 880 DEG C, insulation 40min, and tempering temperature is 690 DEG C ~ 730 DEG C, insulation 90min.The fluctuation of strict control furnace temperature, ensures that the yield strength of material rolls off the production line in standard prescribed strength, reduces the yield tensile ratio of material.
A kind of 4130X weldless steel tube for the manufacture of on-board high-voltage gas cylinder that said process is produced, the mass percentage of its chemical composition is: C 0.28 ~ 0.34%, Si 0.15 ~ 0.35%, Mn 0.7 ~ 0.9%, Cr 0.95 ~ 1.10%, Mo 0.20 ~ 0.25%, Al 0.010 ~ 0.040%, P≤0.020%, S≤0.010%, Ni≤0.18, Cu≤0.20, As+Sn+Sb+Bi+Pb≤0.035%, and all the other are iron and micro impurity element.
The each exemplary chemical composition (%) of table 1
| Embodiment | C | Si | Mn | P | S | Cr | Mo | Al |
| Embodiment 1 | 0.29 | 0.27 | 0.74 | 0.010 | 0.004 | 0.60 | 1.049 | 0.220 |
| Embodiment 2 | 0.30 | 0.26 | 0.76 | 0.009 | 0.003 | 0.65 | 1.046 | 0.221 |
| Embodiment 3 | 0.31 | 0.27 | 0.77 | 0.009 | 0.003 | 0.70 | 0.970 | 0.249 |
Each embodiment thermal treatment process is as shown in table 2.
The each example thermal treatment process of table 2
Each embodiment mechanics properties testing result is as shown in table 3.
The each embodiment mechanical experimental results of table 3
As can be seen from Table 3, the intensity level that weldless steel tube material of the present invention has good mechanical property, particularly material controls stable, and yield tensile ratio is little, and steel low-temperature impact toughness is good, and-60 DEG C of impact values reach more than 100J, and material has fine intensity and toughness.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (6)
1. the 4130X weldless steel tube for the manufacture of on-board high-voltage gas cylinder, it is characterized in that described steel pipe chemical composition mass percent is: C 0.28 ~ 0.34%, Si 0.15 ~ 0.35%, Mn 0.7 ~ 0.9%, Cr 0.95 ~ 1.10%, Mo 0.20 ~ 0.25%, Al 0.010 ~ 0.040%, P≤0.020%, S≤0.010%, Ni≤0.18, Cu≤0.20, As+Sn+Sb+Bi+Pb≤0.035%, all the other are iron and micro impurity element.
2. as claimed in claim 1 for the manufacture of the 4130X weldless steel tube of on-board high-voltage gas cylinder, it is characterized in that described steel pipe chemical composition mass percent is: C 0.290%, Si 0.270%, Mn 0.740%, P0.011%, S 0.002%, Cr 1.00%, Mo 0.220%, Al 0.024%, all the other are iron and micro impurity element.
3. prepare as claimed in claim 1 or 2 for the manufacture of a method for the 4130X weldless steel tube of on-board high-voltage gas cylinder, it is characterized in that comprising the following steps: the heat treatment process of smelt production, Rolling Production process and material.
4. as claimed in claim 3 for the manufacture of the preparation method of the 4130X weldless steel tube of on-board high-voltage gas cylinder, it is characterized in that: described smelt production comprises the degassed and round billet continuous casting of hot metal pretreatment, converter smelting, LF refining, VD; Converter smelting molten iron all adopts pre-desulphurised hot metal, molten iron requires S≤0.05%, P≤0.12%, final deoxygenation adopts has aluminium deoxidation, terminal temperature >=1630 DEG C, LF refining requires omnidistance normal Argon, adopt from low several grades to height number grade heating mode, the degassed dark vacuum≤0.10Kpa of VD, dark vacuum >=13 minute, the VD later stage feeds silicon-calcium wire, ensure after line feeding soft blow time >=15min; Pulling speed of continuous casting controls at 0.35m/min, superheating temperature≤30 DEG C of molten steel.
5. as claimed in claim 3 for the manufacture of the preparation method of the 4130X weldless steel tube of on-board high-voltage gas cylinder, it is characterized in that: the operation of rolling of described steel comprises the heating of round base, perforation, tube rolling, sizing, cold bed cools, flaw detection, the heating of circle base adopts preheating section, heating zone, soaking zone Segmented heating, preheating temperature controls at 980 DEG C-1150 DEG C, heating zone controls at 1100 DEG C-1280 DEG C, soaking zone controls at 1240 DEG C-1290 DEG C, tube rolling temperature controls at 1150 DEG C-1200 DEG C, temperature >=850 DEG C after sizing, cold bed adopts solid matter retarded cooling process, more than 650 DEG C, rate of cooling≤0.50 DEG C/s.
6. as claimed in claim 3 for the manufacture of the preparation method of the 4130X weldless steel tube of on-board high-voltage gas cylinder, it is characterized in that: described Heat Treatment Of Steel technique, adopt quenching+tempering hardening and tempering process, quenchant is water, quenching temperature is 880 DEG C, insulation 40min, tempering temperature is 690 DEG C ~ 730 DEG C, insulation 90min.
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Cited By (10)
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| CN105603335A (en) * | 2016-01-19 | 2016-05-25 | 安徽涌畅铸件有限公司 | Production method of natural gas alloy steel pipe |
| CN108277435A (en) * | 2018-03-21 | 2018-07-13 | 包头钢铁（集团）有限责任公司 | A kind of anti-corrosion pressure-bearing seamless steel pipe and its production method |
| CN109022663A (en) * | 2018-07-11 | 2018-12-18 | 石钢京诚装备技术有限公司 | A kind of method for refining of 890QL grades of cantilever crane steel |
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| CN105603335A (en) * | 2016-01-19 | 2016-05-25 | 安徽涌畅铸件有限公司 | Production method of natural gas alloy steel pipe |
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| CN108277435A (en) * | 2018-03-21 | 2018-07-13 | 包头钢铁（集团）有限责任公司 | A kind of anti-corrosion pressure-bearing seamless steel pipe and its production method |
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| CN109022663B (en) * | 2018-07-11 | 2020-05-15 | 石钢京诚装备技术有限公司 | Method for refining 890 QL-grade arm support steel |
| CN109594021A (en) * | 2019-01-11 | 2019-04-09 | 包头钢铁（集团）有限责任公司 | A kind of 1000MPa grades of high-strength seamless steel pipe for gas cylinder and preparation method thereof |
| CN109778064A (en) * | 2019-01-11 | 2019-05-21 | 包头钢铁（集团）有限责任公司 | A kind of economical 555MPa grades of seamless steel pipes and preparation method thereof |
| CN111172478A (en) * | 2020-02-11 | 2020-05-19 | 包头钢铁（集团）有限责任公司 | Seamless steel tube for cold drawing gas cylinder and preparation method thereof |
| CN112372238A (en) * | 2020-09-29 | 2021-02-19 | 浙江蓝能燃气设备有限公司 | High-pressure ultrahigh-pressure hydrogen storage bottle type container and manufacturing method thereof |
| CN115679196A (en) * | 2021-07-30 | 2023-02-03 | 宝山钢铁股份有限公司 | Seamless steel pipe for self-lubricating automobile driving shaft and manufacturing method thereof |
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