CN102304613B - Steel pipe for supplemental restraint system and manufacture method thereof - Google Patents
Steel pipe for supplemental restraint system and manufacture method thereof Download PDFInfo
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- CN102304613B CN102304613B CN201110279653.4A CN201110279653A CN102304613B CN 102304613 B CN102304613 B CN 102304613B CN 201110279653 A CN201110279653 A CN 201110279653A CN 102304613 B CN102304613 B CN 102304613B
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Abstract
The steel pipe being suitable for airbag system disclosed by the invention, this steel pipe is at tubulation or through once cold rolling, the steel composition had contains below C:0.12% according to quality %, Mn:1.00 ~ 1.40%, below S:0.01%, below P:0.015%, Si:0.15 ~ 0.35%, below Ni:0.25%, Cr:0.40 ~ 0.80%, Mo:0.30 ~ 0.60%, below V:0.07%, below Cu:0.35%, Al:0.15 ~ 0.05%, below Ne:0.05%, below Ti:0.05%, below Sn:0.05%, below Sb:0.05%, below As:0.05%, below Pb:0.05%, and Sn, Sb, As, the total amount less than 0.15% of each element of Pb, remainder is Fe.The invention also discloses the preparation method of this steel pipe, the steel pipe of preparation has following mechanical property: tensile strength 1000 ~ 1137MPa, yield strength are 875MPa, elongation (being less than 2 inches of scales most) 13%, Rockwell hardness≤37Rc, minimum burst pressure is 18200PSiminimun, steel pipe bears pressure cycling 4500, impact property when-60 DEG C, and impact energy is 10ft-lbfo.
Description
Technical field
The present invention relates to a kind of there is more than high strength 1000MPa high strength and high tenacity be suitable for the steel pipe of airbag system, the invention still further relates to the manufacture method of this steel pipe.
Background technology
In recent years, in automobile industry, the importing increasing the device of vehicle safety obtains positive progress.One example of this device is exactly airbag system, when this device collides, before passenger and bearing circle or panel board etc. collide, launches air bag between they and passenger with gas etc., absorbs the kinergety of passenger and seeks to alleviate injury.
Existing airbag system, uses the gas of explosive medicine generation for launching air bag.But, consider from the responsiveness of air-bag deployment speed and the requirement of gas pressure adjusting, and develop the airbag system of other kinds of filling the high pressure gas for launching air bag in steel pipe, it is widely applicable.
This airbag system of the latter, is generally being called that the steel pipe inner high voltage of pressure accumulator remains the gas for launching.During collision, quickly spraying in air bag for the gas launched in pressure accumulator.Consequently, as the steel pipe that the high pressure gas pressure accumulator for launching uses, in very short time with large rate of straining load stress.Thus different from this simple works such as existing pressurised cylinder and linear tube, the steel pipe that the pressure accumulator as airbag system uses is required high dimensional precision, processibility and welding shape, is also required high strength and excellent resistance to explosion.
Be applicable to steel pipe for supplemental restraint system and the manufacture method thereof of pressure accumulator, be published in such as No. 10-140238, Unexamined Patent, No. 10-140249, Unexamined Patent, No. 10-140250, Unexamined Patent, No. 10-140283, Unexamined Patent, No. 10-212549, Unexamined Patent, No. 2002-294339, JP, No. 11-199929, Unexamined Patent, No. 2001-49343, JP, No. 2002-194501, JP.
Technology described in above-mentioned each publication, all intention manufactures high-intensity high-tenacity steel pipe for supplemental restraint system, but, as tensile strength with more than 590MPa for target, bright by embodiment page table, tensile strength is the highest is only 947MPa.
Technology described in above-mentioned publication, also can obtain sufficient performance for existing airbag system.But, along with the lightweight of automobile is more and more stronger in recent years, airbag system is also required miniaturization, lightweight.Thus also require the more thin-walled property of the more high pressure chemical combination steel pipe of accumulator pressure.
Summary of the invention
One of technical problem to be solved by this invention is the steel pipe using (namely the pressure accumulator of airbag system is used) as airbag system providing a kind of high strength, high tenacity.
Two of technical problem to be solved by this invention is the manufacture method providing above-mentioned steel pipe.
The present inventor finds, provide and have high strength and resistance to explosion.Can fully manage corresponding to the air bag of accumulator pressure, steel pipe must have following characteristic:
A () tensile strength is greater than 1000MPa;
B () yield strength is 875mpa;
(c) elongation (being less than 2 inches of scales most) 13%,
(d) Rockwell hardness≤37Rc;
E () minimum burst pressure is 18200PSiminimun, steel pipe bears pressure cycling 4500, impact property when-60 °, and impact energy is 10ft-lbfo.
As the steel pipe being suitable for airbag system of first aspect present invention, this steel pipe is at tubulation or through once cold rolling, the steel composition had contains below C:0.12% according to quality %, Mn:1.00 ~ 1.40%, below S:0.01%, below P:0.015%, Si:0.15 ~ 0.35%, below Ni:0.25%, Cr:0.40 ~ 0.80%, Mo:0.30 ~ 0.60%, below V:0.07%, below Cu:0.35%, Al:0.15 ~ 0.05%, below Ne:0.05%, below Ti:0.05%, below Sn:0.05%, below Sb:0.05%, below As:0.05%, below Pb:0.05%, and the total amount less than 0.15% of each element of SnSbAsPb, remainder is Fe.
As the preparation method being suitable for the steel pipe of airbag system of second aspect present invention, be made up of following steps:
A () is first by pipe that the steel by above-mentioned content is made, by process furnace, the high-temperature zone of heating of pipe blank to 1125 DEG C ~ 1170 DEG C is stopped 5 ~ 15 minutes, hot piercing is carried out by tapping machine, form Φ 62mm × 4.0 ~ 4.8mm or Φ 78mm × 5.6mm hollow forging, then naturally cooling, then enter pickling tank pickling 5 ~ 10 minutes, after pickling post-flush is clean, send into continuous annealing furnace, heat-treat; Bonderizing is carried out 5 ~ 10 minutes after thermal treatment; Bonderizing is also rinsed well and is carried out reconditioning to hollow forging afterwards, then undertaken cold rolling by duo mill; It is made to arrive the wroughtsteel pipe of trimmed size by the deflection of rolling; Wherein the pickle solution of cleanup acid treatment is formed by the preparation of raw material of following weight percent: sulfuric acid 20%, nitric acid 10%, water 70%; Described thermal treatment adopts roller-hearth continuous annealing furnace, and furnace temperature is at 700 DEG C ~ 800 DEG C, and annealing time was at 20 ~ 30 minutes; Parkerized Phosphating Solution is formed by the preparation of raw material of following weight percent: sulfuric acid 5%, nitric acid 25%, water 70%; Describedly carry out cold rolling referring to by duo mill and wear a plug by 60 type duo mills at the center of pipe, then by the up and down pair roller of pipe by 60 type duo mills, the deflection of size to steel billet according to fished pipe controls the requirement reaching rolling;
B wroughtsteel pipe that step (a) is made by () carries out modifier treatment by vacuum hardening and tempering furnace or electrically heated induction coil to wroughtsteel pipe, can become the structure of tempered martensite; Arrive following mechanical property: tensile strength 1000 ~ 1137MPa, yield strength are 875MPa, elongation (being less than 2 inches of scales most) 13%, Rockwell hardness≤37Rc, minimum burst pressure is 18200PSiminimun, steel pipe bears pressure cycling 4500, impact property when-60 DEG C, and impact energy is 10ft-lbfo; Described modifier treatment wroughtsteel pipe is heated to 850 DEG C ~ 900 DEG C, then reaches tempering object by cooling fast.
Owing to have employed technical scheme as above, the airbag system that the present invention makes steel pipe used can meet the demands, and reaches high strength, light-weighted requirement.
Embodiment
Below, the present invention will be described in more detail.In this manual, representing " % " of the composition of steel, unless otherwise specified, is exactly " quality % "
The steel pipe being suitable for airbag system of the present invention, this steel pipe is at tubulation or through once cold rolling, the steel composition had contains below C:0.12% according to quality %, Mn:1.00 ~ 1.40%, below S:0.01%, below P:0.015%, Si:0.15 ~ 0.35%, below Ni:0.25%, Cr:0.40 ~ 0.80%, Mo:0.30 ~ 0.60%, below V:0.07%, below Cu:0.35%, Al:0.15 ~ 0.05%, below Ne:0.05%, below Ti:0.05%, below Sn:0.05%, below Sb:0.05%, below As:0.05%, below Pb:0.05%, and the total amount less than 0.15% of each element of SnSbAsPb, remainder is Fe.
Be suitable for the preparation method of the steel pipe of airbag system, be made up of following steps:
A () is first by pipe that the steel by above-mentioned content is made, by process furnace, the high-temperature zone of heating of pipe blank to 1125 DEG C ~ 1170 DEG C is stopped 5 ~ 15 minutes, hot piercing is carried out by tapping machine, form Φ 62mm × 4.0 ~ 4.8mm or Φ 78mm × 5.6mm hollow forging, then naturally cooling, then enter pickling tank pickling 5 ~ 10 minutes, after pickling post-flush is clean, send into continuous annealing furnace, heat-treat; Bonderizing is carried out 5 ~ 10 minutes after thermal treatment; Bonderizing is also rinsed well and is carried out reconditioning to hollow forging afterwards, then undertaken cold rolling by duo mill; It is made to arrive the wroughtsteel pipe of trimmed size by the deflection of rolling; Wherein the pickle solution of cleanup acid treatment is formed by the preparation of raw material of following weight percent: sulfuric acid 20%, nitric acid 10%, water 70%; Described thermal treatment adopts roller-hearth continuous annealing furnace, and furnace temperature is at 700 DEG C ~ 800 DEG C, and annealing time was at 20 ~ 30 minutes; Parkerized Phosphating Solution is formed by the preparation of raw material of following weight percent: sulfuric acid 5%, nitric acid 25%, water 70%; Describedly carry out cold rolling referring to by duo mill and wear a plug by 60 type duo mills at the center of pipe, then by the up and down pair roller of pipe by 60 type duo mills, the deflection of size to steel billet according to fished pipe controls the requirement reaching rolling;
B wroughtsteel pipe that step (a) is made by () carries out modifier treatment by vacuum hardening and tempering furnace or electrically heated induction coil to wroughtsteel pipe, can become the structure of tempered martensite; Arrive following mechanical property: tensile strength 1000 ~ 1137MPa, yield strength are 875MPa, elongation (being less than 2 inches of scales most) 13%, Rockwell hardness≤37Rc, minimum burst pressure is 18200PSiminimun, steel pipe bears pressure cycling 4500, impact property when-60 DEG C, and impact energy is 10ft-lbfo; Described modifier treatment wroughtsteel pipe is heated to 850 DEG C ~ 900 DEG C, then reaches tempering object by cooling fast.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; under the prerequisite not departing from the utility model spirit and scope; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (1)
1. be suitable for the steel pipe of airbag system, this steel pipe is at tubulation or through once cold rolling, the steel composition had contains below C:0.12% according to quality %, Mn:1.00 ~ 1.40%, below S:0.01%, below P:0.015%, Si:0.15 ~ 0.35%, below Ni:0.25%, Cr:0.40 ~ 0.80%, Mo:0.30 ~ 0.60%, below V:0.07%, below Cu:0.35%, Al:0.15 ~ 0.05%, below Ne:0.05%, below Ti:0.05%, below Sn:0.05%, below Sb:0.05%, below As:0.05%, below Pb:0.05%, and Sn, Sb, As, the total amount less than 0.15% of each element of Pb, remainder is Fe,
The described preparation method being suitable for the steel pipe of airbag system, is made up of following steps:
A () is first by pipe that the steel by above-mentioned content is made, by process furnace, the high-temperature zone of heating of pipe blank to 112 DEG C ~ 1170 DEG C is stopped 5 ~ 15 minutes, hot piercing is carried out by tapping machine, form Φ 62mm × 4.0 ~ 4.8mm or Φ 78mm × 5.6mm hollow forging, then naturally cooling, then enter pickling tank pickling 5 ~ 10 minutes, after pickling post-flush is clean, send into continuous annealing furnace, heat-treat; Bonderizing is carried out 5 ~ 10 minutes after thermal treatment; Bonderizing is also rinsed well and is carried out reconditioning to hollow forging afterwards, then undertaken cold rolling by duo mill; It is made to arrive the wroughtsteel pipe of trimmed size by the deflection of rolling; Wherein the pickle solution of cleanup acid treatment is formed by the preparation of raw material of following weight percent: sulfuric acid 20%, nitric acid 10%, water 70%; Described thermal treatment adopts roller-hearth continuous annealing furnace, and fire box temperature is at 700 DEG C ~ 800 DEG C, and annealing time was at 20 ~ 30 minutes; Parkerized Phosphating Solution is formed by the preparation of raw material of following weight percent: sulfuric acid 5%, nitric acid 25%, water 70%; Describedly carry out cold rolling referring to by duo mill and wear a plug by 60 type duo mills at the center of pipe, then by the up and down pair roller of pipe by 60 type duo mills, the deflection of size to steel billet according to fished pipe controls the requirement reaching rolling;
B wroughtsteel pipe that step (a) is made by () carries out modifier treatment by vacuum hardening and tempering furnace or electrically heated induction coil to wroughtsteel pipe, can become the structure of tempered martensite; Arrive following mechanical property: tensile strength 1000 ~ 1137MPa, yield strength are 875MPa, elongation 13%, Rockwell hardness≤37Rc, minimum burst pressure is 18200PSiminimun, steel pipe bears pressure cycling 4500, impact property when-60 DEG C, and impact energy is 10ft-lbfo; Described modifier treatment wroughtsteel pipe is heated to 850 DEG C ~ 900 DEG C, then reaches tempering object by cooling fast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110279653.4A CN102304613B (en) | 2011-09-20 | 2011-09-20 | Steel pipe for supplemental restraint system and manufacture method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110279653.4A CN102304613B (en) | 2011-09-20 | 2011-09-20 | Steel pipe for supplemental restraint system and manufacture method thereof |
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| CN102304613A CN102304613A (en) | 2012-01-04 |
| CN102304613B true CN102304613B (en) | 2016-01-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103789522A (en) * | 2014-01-26 | 2014-05-14 | 重庆无缝管件厂 | Novel process for coldly rolling small-diameter stainless steel pipe |
| CN107552567A (en) * | 2017-09-08 | 2018-01-09 | 苏州钢特威钢管有限公司 | The preparation method of 1Cr17 ferrite stainless steel pipes |
| CN112981234B (en) * | 2021-01-21 | 2022-09-23 | 江阴兴澄特种钢铁有限公司 | Steel for square billet continuous casting and rolling microalloyed automobile safety air bag pipe and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1375683A1 (en) * | 2001-03-29 | 2004-01-02 | Sumitomo Metal Industries, Ltd. | High strength steel tube for air bag and method for production thereof |
| CN1791694A (en) * | 2003-05-21 | 2006-06-21 | 住友金属工业株式会社 | Steel pipe for an airbag system and a method for its manufacture |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3220975B2 (en) * | 1996-11-12 | 2001-10-22 | 住友金属工業株式会社 | Manufacturing method of steel pipe for high strength and high toughness air bag |
| JP3678147B2 (en) * | 2000-12-27 | 2005-08-03 | 住友金属工業株式会社 | Steel tube for high strength and toughness airbag and its manufacturing method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1375683A1 (en) * | 2001-03-29 | 2004-01-02 | Sumitomo Metal Industries, Ltd. | High strength steel tube for air bag and method for production thereof |
| CN1791694A (en) * | 2003-05-21 | 2006-06-21 | 住友金属工业株式会社 | Steel pipe for an airbag system and a method for its manufacture |
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| CN102304613A (en) | 2012-01-04 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 201400, Shanghai, Fengxian District, Pu Shun Road, No. third, 913, 1-5 Applicant after: SHANGHAI ZUNMA AUTO PIPE CO., LTD. Address before: 201400 No. 2, No. 648, No. 5 Yang Cun, South Bridge Town, Shanghai, Fengxian District Applicant before: Shanghai Zunma Stainless Steel Pipe Manufacturing Co.,Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SHANGHAI ZUNMA STAINLESS STEEL PIPE MANUFACTURING CO.,LTD. TO: SHANGHAI ZUNMA AUTOMOBILE PIPE FITTING CO., LTD. |
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| C14 | Grant of patent or utility model | ||
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