CN102373375A - Manufacture process of high-performance austenitic steel pipes - Google Patents
Manufacture process of high-performance austenitic steel pipes Download PDFInfo
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- CN102373375A CN102373375A CN2011103072760A CN201110307276A CN102373375A CN 102373375 A CN102373375 A CN 102373375A CN 2011103072760 A CN2011103072760 A CN 2011103072760A CN 201110307276 A CN201110307276 A CN 201110307276A CN 102373375 A CN102373375 A CN 102373375A
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Abstract
The invention discloses a process for preparing high-performance austenitic steel pipes, which is characterized by comprising the following steps that: (1) steel materials are finely selected, and smelting, crystallization granulation and die casting are carried out; (2) cylindrical steel blanks are obtained after cooling; (3) the steel blanks are heated and are perforated; (4) the perforated steel pipes are sent into a rolling mill for rolling; (5) air cooling is carried out after the rolling, and then, the steel pipes are heated for high-temperature softening treatment; (6) the air cooling is carried out after the softening treatment, and the cooled steel pipes are straightened; and (7) the surfaces of the steel pipes are polished by a polishing machine after the straightening. The process has the advantages that the defects in the prior art are overcome, the integral performance of the steel pipes is improved, the cost is reduced, the yield strength of the steel pipes is 675MPa, the tensile intensity is 870MPa, and the extension rate is 23 percent. Therefore, the steel pipes can be widely adopted, and the prospects are good.
Description
Technical field
The present invention relates to a kind of steel tube manufacture technique, especially relate to a kind of high-performance austenite steel tube manufacture technique.
Background technology
In short supply along with world energy sources, the exploitation of Sweet natural gas is imperative.And that China's natural gas ground is hidden is abundant, west area especially, exploitation and use Sweet natural gas that source, advantageous ground advantage is arranged.Compressed natural gas (CNG) has obtained using widely as the Urban traffic economy of energy green energy resource of environmental protection again.
The tube bank trailer is mainly used in transportation and storage compressed natural gas (CNG); Large-scale high-pressure seamless container safe, reliable, save the consistent favorable comment that space, advantage such as easy for installation have obtained the user; It flows, transportation characterization is the city general facilities air feed that flows easily, for the fixing gas transport of gas station provides great facility.
Long tube bundle trailer is the performance seamless steel pipe with the gas cylinder main raw material(s).Because environment for use is abominable; In use TR changes greatly; Carrying immense pressure, therefore, in order to guarantee this trailer safety in use; Necessarily require long tube bundle trailer with gas cylinder with the purity of steel of weldless steel tube is high, intensity is high, plasticity, good toughness, surface quality is good.Thereby the production difficulty is big.
Close grainization: promptly require the abundant refinement of as-cast structure of steel, original grain can be broken by fully, and final grain-size reaches below 9 grades.Facts have proved, under the condition that guarantees above-mentioned technical indicator, can make the obdurability of steel obtain to increase substantially.As everyone knows, the schedule of reinforcement of metal has solution strengthening, precipitation strength, dislocations strengthening, heat treatment reinforcement, precipitation strength and grain refining reinforcement etc.In these schedule of reinforcements, grain refining is uniquely can improve intensity and flexible effective ways simultaneously.Other method all is when intensity improves, and impelling strength descends, and therefore, the complete processing that obtains fine-grain metal material is the gordian technique in the T/P91.92 steel production process.And in actual production, different with performance according to material composition, the technology that obtains fine grain structure has: (1) ECAP technology; (2) ARB technology; (3) CSP technology; (4) relaxation is separated out the control correlation technique.At present, the grain refinement technology that generally adopts in the fine-grained steel pipe production both at home and abroad is that relaxation is separated out the control correlation technique.The impelling strength of existing steel pipe that technology is produced and the peculiar parameter request that creep rupture strength can't adapt to the supercritical generating boiler.
Summary of the invention
To the defective of prior art, the object of the present invention is to provide a kind of high-performance austenite steel tube manufacture technique.More particularly, relate to a kind of method that can make the weldless steel tube of performances such as having good intensity, toughness and corrodibility through that simplify and ME serialization with good productivity at low cost.
Technical scheme of the present invention is following:
A kind of high-performance austenite steel pipe, the chemical component weight per-cent of this steel pipe is: C:0.072-0.083%; Si:0.22-0.28%; Mn:0.59-0.87%; P≤0.033%; S≤0.0.021%; Cr:17.3-18.8%; Ti:0.04-0.44%; Cu:2.74-3.33%; Nb:0.43-0.58%; Al:0.009-0.026%; Mo:0.27-0.45%; Surplus is Fe and unavoidable impurities.
The ME of said high-performance austenite steel pipe,
(1) selected steel material is smelted, crystallization granulation, die casting;
(2) obtain cylindrical steel billet after the cooling;
(3) to above-mentioned steel billet heating, the eleven punch 11 of going forward side by side;
(4) steel pipe after the perforation is sent in the rolls and is rolled;
(5) rolling back air cooling, reheat carries out hot mastication to be handled;
(6) hot mastication is handled the back air cooling, to cooled steel pipe alignment;
(7) with polishing machine steel tube surface is polished again after the alignment.
The chemical component weight per-cent of said steel pipe is: C:0.074-0.081%; Mn:0.62-0.83%; P≤0.030%; S≤0.0.022%; Cr:17.5-18.4%; Ti:0.15-0.40%; Cu:2.79-3.23%; Mo:0.34-0.41%; Nb:0.45-0.55%; Zn:0.24-0.91%; Surplus is Fe and unavoidable impurities.
Advantage of the present invention is that used alloying constituent is selected through repeatedly, and price is not too high.But the over-all properties of steel pipe is more high than production technique in the past, like performances such as intensity, toughness and corrodibility, has satisfied requirement of actual application.
Embodiment
Embodiment one
The chemical component weight per-cent of the steel pipe of this instance manufacturing is: C:0.075%; Si:0.21%; Mn:0.60%; P 0.030%; S 0.021%; Cr:17.4%; Ti:0.07%; Cu:2.77%; Nb:0.45%; Al:0.011%; Mo:0.293%; Surplus is Fe and unavoidable impurities,
The technology of above-mentioned high-performance austenite steel pipe:
(1) selected steel material is smelted, crystallization granulation, die casting;
(2) obtain cylindrical steel billet after the cooling;
(3) to above-mentioned steel billet heating, the eleven punch 11 of going forward side by side;
(4) steel pipe after the perforation is sent in the rolls and is rolled;
(5) rolling back water-cooled, reheat carries out hot mastication to be handled;
(6) hot mastication is handled the back air cooling, to cooled steel pipe alignment;
(7) with polishing machine steel tube surface is polished again after the alignment.
Through detecting, the ys of steel pipe is 670MPa under inferior embodiment, and tensile strength is 850MPa, and unit elongation is 22%.
Embodiment two
The chemical component weight per-cent of the steel pipe of this instance manufacturing is: C:0.082%; Si:0.25%; Mn:0.84%; P 0.031%; S 0.020%; Cr:18.3%; Ti:0.33%; Cu:3.23%; Mo:0.41%; Surplus is Fe and unavoidable impurities.
The ME of above-mentioned high-performance austenite steel pipe:
(1) selected steel material is smelted, crystallization granulation, die casting;
(2) obtain cylindrical steel billet after the cooling;
(3) to above-mentioned steel billet heating, the eleven punch 11 of going forward side by side;
(4) steel pipe after the perforation is sent in the rolls and is rolled;
(5) rolling back air cooling, reheat carries out hot mastication to be handled;
(6) hot mastication is handled the back water-cooled, to cooled steel pipe alignment;
(7) with polishing machine steel tube surface is polished again after the alignment.
Through detecting, the ys of steel pipe is 668MPa under inferior embodiment, and tensile strength is 865MPa, and unit elongation is 24%.
Embodiment three
The chemical component weight per-cent of the steel pipe of this instance manufacturing is: C:0.078%; Mn:0.76%; P 0.024%; S 0.024%; Cr:17.9%; Ti:0.28%; Cu:2.98%; Nb:0.49%; Al:0.019%; Mo:0.40%; Surplus is Fe and unavoidable impurities.
The ME of above-mentioned high-performance austenite steel pipe:
(1) selected steel material is smelted, crystallization granulation, die casting;
(2) obtain cylindrical steel billet after the cooling;
(3) to above-mentioned steel billet heating, the eleven punch 11 of going forward side by side;
(4) steel pipe after the perforation is sent in the rolls and is rolled;
(5) rolling back water-cooled, reheat carries out hot mastication to be handled;
(6) handle the back water-cooled, to cooled steel pipe alignment;
(7) with polishing machine steel tube surface is polished again after the alignment.
Through detecting, the ys of steel pipe is 675MPa under inferior embodiment, and tensile strength is 870MPa, and unit elongation is 21%.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technical process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (3)
1. a high-performance austenite steel pipe is characterized in that, the chemical component weight per-cent of this steel pipe is: C:0.072-0.083%; Si:0.22-0.28%; Mn:0.59-0.87%; P≤0.033%; S≤0.0.021%; Cr:17.3-18.8%; Ti:0.04-0.44%; Cu:2.7-43.33%; Nb:0.43-0.58%; Al:0.009-0.026%; Mo:0.27-0.45%; Surplus is Fe and unavoidable impurities.
2. technology for preparing the said high-performance austenite of claim 1 steel pipe is characterized in that:
(1) selected steel material is smelted, crystallization granulation, die casting;
(2) obtain cylindrical steel billet after the cooling;
(3) to above-mentioned steel billet heating, the eleven punch 11 of going forward side by side;
(4) steel pipe after the perforation is sent in the rolls and is rolled;
(5) rolling back air cooling, reheat carries out hot mastication to be handled;
(6) handle the back air cooling, to cooled steel pipe alignment;
(7) with polishing machine steel tube surface is polished again after the alignment.
3. method according to claim 2 is characterized in that, the chemical component weight per-cent of said steel pipe is: C:0.074-0.081%; Mn:0.62-0.83%; P≤0.030%; S≤0.0.022%; Cr:17.5-18.4%; Ti:0.15-0.40%; Cu:2.79-3.23%; Mo:0.34-0.41%; Nb:0.45-0.55%; Zn:0.24-0.91%; Surplus is Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103072760A CN102373375A (en) | 2011-10-10 | 2011-10-10 | Manufacture process of high-performance austenitic steel pipes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103072760A CN102373375A (en) | 2011-10-10 | 2011-10-10 | Manufacture process of high-performance austenitic steel pipes |
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| CN102373375A true CN102373375A (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103072760A Pending CN102373375A (en) | 2011-10-10 | 2011-10-10 | Manufacture process of high-performance austenitic steel pipes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464507A (en) * | 2013-07-25 | 2013-12-25 | 攀钢集团成都钢钒有限公司 | Production method for high-precision austenite seamless steel pipe |
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2011
- 2011-10-10 CN CN2011103072760A patent/CN102373375A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464507A (en) * | 2013-07-25 | 2013-12-25 | 攀钢集团成都钢钒有限公司 | Production method for high-precision austenite seamless steel pipe |
| CN103464507B (en) * | 2013-07-25 | 2015-11-11 | 攀钢集团成都钢钒有限公司 | A kind of method of producing high-precision austenite seamless steel pipe |
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Application publication date: 20120314 |