CN104152791A - High-strength hard seamless steel tube and manufacturing technology thereof - Google Patents
High-strength hard seamless steel tube and manufacturing technology thereof Download PDFInfo
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- CN104152791A CN104152791A CN201410397209.6A CN201410397209A CN104152791A CN 104152791 A CN104152791 A CN 104152791A CN 201410397209 A CN201410397209 A CN 201410397209A CN 104152791 A CN104152791 A CN 104152791A
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Abstract
The invention discloses a high-strength hard seamless steel tube which comprises, by weight, 150 parts to 450 parts of C, 12 parts to 28 parts of Si, six parts to 25 parts of Mo, eight parts to 20 parts of Cu, 30 parts to 90 parts of Al, two parts to 13 parts of Ti, four parts to 17 parts of V, one part to nine parts of Zr, eight parts to 15 parts of Ca : Ni, one part to five parts of Ti, two parts to six parts to P, five parts to 12 parts of S, one part to seven parts of Ho, two parts to five parts of Eu, 300 parts to 1200 parts of Fe, and one part to ten parts of impurities. A manufacturing technology of the high-strength hard seamless steel tube comprises the following steps of performing heating, then performing rolling, warming the steel tube, performing one-segment cooling on the steel tube, then, performing second-segment cooling on the steel tube, gradually warming the steel tube, then, naturally cooling the steel tube to the room temperature, coating lubricating liquid on the surface of the steel tube, and performing chromium-free Dacromet treatment. According to the high-strength hard seamless steel tube and the manufacturing technology of the high-strength hard seamless steel tube, the strength and the toughness of the seamless steel tube can be improved, the service life of the tube is prolonged, and the manufacturing method is simple and high in efficiency.
Description
Technical field
The present invention relates to weldless steel tube field, particularly relate to a kind of high strength hard weldless steel tube and preparation technology thereof.
Background technology
High strength, high tenacity weldless steel tube, will be heated to after the perforated steel billit of high temperature with perforation rolling press at present, calendering, stretches, and is configured as the tubulose of goods, after this, applies thermal treatment and manufacture.By this manufacturing process, make steel pipe possess high strength, high tenacity and erosion resistance.
But, in recent years, from saving the viewpoint of the energy and the program of omission, use online thermal treatment, i.e. thermal treatment in tubulation line, the simplification of investigation manufacturing course.Be conceived to especially effectively utilize the heat that starting material are possessed after hot-work, after tubulation not by pipe cool to room temperature import quenching program, thus, realize the efficient activity of significantly saving the energy and manufacturing course, can obtain the effect that manufacturing cost declines.
If rear in precision work calendering, to adopt direct quenching online heat treatment process, after calendering, be not cooled to room temperature, do not pass through the program of phase transformation and reverse transformation, therefore can produce the problem that crystallization particle diameter easily becomes thick, is difficult to produce excellent toughness and guarantees erosion resistance.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of high strength hard weldless steel tube and preparation technology thereof, can improve intensity and the toughness of weldless steel tube, improves work-ing life, and manufacture method is easy, and efficiency is high.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of high strength hard weldless steel tube is provided, comprise that following material forms by mass fraction: C:150-450 part, Si:12-28 part, Mo:6-25 part, Cu:8-20 part, Al:30-90 part, Ti:2-13 part, V:4-17 part, Zr:1-9 part, Ca:Ni:8-15 part, Ti:1-5 part, P:2-6 part, S:5-12 part, Ho:1-7 part and Eu:2-5 part, all the other are Fe:300-1200 part and impurity: 1-10 part.
In a preferred embodiment of the present invention, comprise that following material forms by mass fraction: C:250 part, Si:20 part, Mo:15 part, Cu:12 part, Al:70 part, Ti:8 part, V:9 part, Zr:6 part, Ca:Ni10 part, Ti:3 part, P:4 part, S:9 part, Ho:5 part and Eu:3 part, all the other are Fe:100 part and impurity: 8 parts.
For solving the problems of the technologies described above, another technical solution used in the present invention is: the preparation technology that a kind of intensity hard weldless steel tube is provided, comprise the following steps: a. rolling processing: first heat, Heating temperature is 800-950 degree Celsius, is then rolled; B. quench treatment: steel pipe is warming up to 800-890 DEG C gradually, is then cooled to 200-220 DEG C by a section, follow by two-step cooling to 90-110 DEG C; C. temper: steel pipe is warming up to 550-580 DEG C gradually, then naturally cools to room temperature; D. surface treatment: apply lubricating fluid in steel tube surface, then carrying out the processing of chromium-free Dyclo coating.
In a preferred embodiment of the present invention, in described step b, one section is cooled to air-cooledly, and be 15-25 minute cooling time.
In a preferred embodiment of the present invention, in described step b, two-step cooling is water-cooled, is undertaken coolingly fast by spray, and be 20-30 minute cooling time.
The invention has the beneficial effects as follows: high strength hard weldless steel tube of the present invention and preparation technology thereof, can improve intensity and the toughness of weldless steel tube, improve work-ing life, manufacture method is easy, and efficiency is high.
Embodiment
To the technical scheme in the embodiment of the present invention be clearly and completely described below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1: a kind of high strength hard weldless steel tube, comprise that following material forms by mass fraction: C:150 part, Si:12 part, Mo:6 part, Cu:8 part, Al:30 part, Ti:2 part, V:4 part, Zr:1 part, Ca:Ni:8 part, Ti:1 part, P:2 part, S:5 part, Ho:1 part and Eu:2 part, all the other are Fe:300 part and impurity: 1-10 part.
A preparation technology for intensity hard weldless steel tube, comprises the following steps: a. rolling processing: first heat, Heating temperature is 800-950 degree Celsius, is then rolled; B. quench treatment: steel pipe is warming up to 800-890 DEG C gradually, then be cooled to 200-220 DEG C by one section, one section is cooled to air-cooled, be 15-25 minute cooling time, follow by two-step cooling to 90-110 DEG C, two-step cooling is water-cooled, is undertaken coolingly fast by spray, and be 20-30 minute cooling time; C. temper: steel pipe is warming up to 550-580 DEG C gradually, then naturally cools to room temperature; D. surface treatment: apply lubricating fluid in steel tube surface, then carrying out the processing of chromium-free Dyclo coating.
Embodiment 2: a kind of high strength hard weldless steel tube, comprise that following material forms by mass fraction: C:450 part, Si:28 part, Mo:25 part, Cu:20 part, Al:90 part, Ti:13 part, V:17 part, Zr:9 part, Ca:Ni:15 part, Ti:5 part, P:6 part, S:12 part, Ho:7 part and Eu:5 part, all the other are Fe:1200 part and impurity: 10 parts.
All the other are with embodiment 1.
Embodiment 3: a kind of high strength hard weldless steel tube, comprise that following material forms by mass fraction: C:250 part, Si:20 part, Mo:15 part, Cu:12 part, Al:70 part, Ti:8 part, V:9 part, Zr:6 part, Ca:Ni10 part, Ti:3 part, P:4 part, S:9 part, Ho:5 part and Eu:3 part, all the other are Fe:100 part and impurity: 8 parts.
All the other are with embodiment 1.
Be different from prior art, high strength hard weldless steel tube of the present invention and preparation technology thereof, can improve intensity and the toughness of weldless steel tube, improves work-ing life, and manufacture method is easy, and efficiency is high.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a high strength hard weldless steel tube, it is characterized in that, comprise that following material forms by mass fraction: C:150-450 part, Si:12-28 part, Mo:6-25 part, Cu:8-20 part, Al:30-90 part, Ti:2-13 part, V:4-17 part, Zr:1-9 part, Ca:Ni:8-15 part, Ti:1-5 part, P:2-6 part, S:5-12 part, Ho:1-7 part and Eu:2-5 part, all the other are Fe:300-1200 part and impurity: 1-10 part.
2. intensity hard weldless steel tube according to claim 1, it is characterized in that, comprise that following material forms by mass fraction: C:250 part, Si:20 part, Mo:15 part, Cu:12 part, Al:70 part, Ti:8 part, V:9 part, Zr:6 part, Ca:Ni10 part, Ti:3 part, P:4 part, S:9 part, Ho:5 part and Eu:3 part, all the other are Fe:100 part and impurity: 8 parts.
3. a preparation technology for intensity hard weldless steel tube as claimed in claim 1, is characterized in that, comprises the following steps:
A. rolling processing: first heat, Heating temperature is 800-950 degree Celsius, is then rolled;
B. quench treatment: steel pipe is warming up to 800-890 DEG C gradually, is then cooled to 200-220 DEG C by a section, follow by two-step cooling to 90-110 DEG C;
C. temper: steel pipe is warming up to 550-580 DEG C gradually, then naturally cools to room temperature;
D. surface treatment: apply lubricating fluid in steel tube surface, then carrying out the processing of chromium-free Dyclo coating.
4. the preparation technology of intensity hard weldless steel tube as claimed in claim 3, is characterized in that, in described step b, one section is cooled to air-cooledly, and be 15-25 minute cooling time.
5. the preparation technology of intensity hard weldless steel tube as claimed in claim 3, is characterized in that, in described step b, two-step cooling is water-cooled, is undertaken coolingly fast by spray, and be 20-30 minute cooling time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397209.6A CN104152791A (en) | 2014-08-14 | 2014-08-14 | High-strength hard seamless steel tube and manufacturing technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410397209.6A CN104152791A (en) | 2014-08-14 | 2014-08-14 | High-strength hard seamless steel tube and manufacturing technology thereof |
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| CN104152791A true CN104152791A (en) | 2014-11-19 |
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| CN201410397209.6A Pending CN104152791A (en) | 2014-08-14 | 2014-08-14 | High-strength hard seamless steel tube and manufacturing technology thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018821A (en) * | 2015-08-05 | 2015-11-04 | 启东市佳宝金属制品有限公司 | High-carbon alloy |
| CN106286405A (en) * | 2016-07-29 | 2017-01-04 | 广西安讯科技投资有限公司 | A kind of processing technology of the fire pump guide wheel of coating |
-
2014
- 2014-08-14 CN CN201410397209.6A patent/CN104152791A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018821A (en) * | 2015-08-05 | 2015-11-04 | 启东市佳宝金属制品有限公司 | High-carbon alloy |
| CN106286405A (en) * | 2016-07-29 | 2017-01-04 | 广西安讯科技投资有限公司 | A kind of processing technology of the fire pump guide wheel of coating |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141119 |
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| WD01 | Invention patent application deemed withdrawn after publication |