CN109664076A - A kind of production technology of the seamless square tube of high-precision - Google Patents
A kind of production technology of the seamless square tube of high-precision Download PDFInfo
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- CN109664076A CN109664076A CN201811645846.5A CN201811645846A CN109664076A CN 109664076 A CN109664076 A CN 109664076A CN 201811645846 A CN201811645846 A CN 201811645846A CN 109664076 A CN109664076 A CN 109664076A
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- square tube
- seamless
- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of production technologies of the seamless square tube of high-precision, the seamless square tube of high-precision is the extension on the basis of production technology of seamless pipe, including seven key steps: seamless pipe pipe manufacture-drawing forms seamless square tube pipe-heat treatment-flaw detection-aligning-acid wash passivation-grinding-polishing.Through the above way, the present invention can produce that internal structure is uniform, square tube that the good high-precision of lengthwise dimension stability is seamless, the good mechanical performance of the square tube, surface corrosion resistance after acid wash passivation improves, and is conducive to improve square tube to the tolerance of weather.
Description
Technical field
The present invention relates to square tube manufacturing fields, more particularly to a kind of production technology of the seamless square tube of high-precision.
Background technique
A main application fields of domestic square steel tube are in structural steelwork at present, and structural steelwork is usually long-term sudden and violent
Dew is influenced very greatly with external environment by the external world, and common square tube is by unpacking mostly, and smooth, curling, welding forms circle
Pipe, then rectangular tube is rolled by round tube and then cuts into the length of needs, pipe can all be led to by crimping welding procedure in the process
The inside inconsistency of body structure, influences its stable homogeneous in external environment, and thermal stability and security performance are poor.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of square tube production technologies, are able to produce out high-precision seamless
Square tube.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of seamless square tube of high-precision is provided
Production technology, the production technology of the seamless square tube of high-precision the following steps are included:
Step 1 is heated by square tube blank → perforation → takes the lead → anneals → and pickling → multi-pass cold-drawn (cold rolling) is made accordingly
The round tube pipe of size,
The round tube pipe is carried out multiple drawing and square tube pipe is made by step 2,
Square tube pipe made of the drawing is carried out heat treatment removal internal stress by step 3,
Step 4 detects a flaw the square tube pipe after heat treatment,
Step 5 aligns the square tube pipe,
The pipe is carried out acid wash passivation by step 6,
Finished product is made in square tube pipe accurate grinding polishing after passivation by step 7.
In a preferred embodiment of the present invention, the number of round tube drawing is 3 times in the step 2.
In a preferred embodiment of the present invention, Hubbing method continuously serves as a contrast for short mandrel rod and pulls out method in the step two.
In a preferred embodiment of the present invention, the heat treatment process of the step three kind is solid solution method treatment process,
The solid solution method includes three heating, heat preservation and quenching steps, 40 ~ 50 DEG C/min of the rate of heat addition of the heating stepses, heating
Terminal is 1100 DEG C, and step 2 is heat preservation, and the holding temperature is 1050 ~ 1150 DEG C, and soaking time is according to square tube corner wall
Thickness determines that the soaking time is 2min/mm, and step 3 is to be quickly cooled down step, carries out rapid quenching to square tube using liquid
It is cooling, to form austenite recrystallization.
In a preferred embodiment of the present invention, it is 3% ~ 8% that the hardening media that the rapid chilling section uses, which is concentration,
Salt water.
In a preferred embodiment of the present invention, the method that the flaw detection step uses is supermarket's wave inspection method.
In a preferred embodiment of the present invention, the seamless square tube of the high-precision of finished product made of the step 7 also needs
It is put into progress surface lubrication processing in lubrication groove, lubrication time is 1 ~ 3h.
The beneficial effects of the present invention are: the technical scheme is that on the basis of seamless steel tube production technique, half-and-half
Finished product pipe continues finishing and seamless square tube is made, and reduces welding and curling in common square tube manufacturing process, mentions
High square tube internal structure is uniform, and lengthwise dimension excellent in stability, comprehensive mechanical property is excellent, have good weatherability and
The secondary operation precision of security performance, square tube is also improved.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
The embodiment of the present invention includes:
Embodiment 1
A kind of production technology of the seamless square tube of high-precision, the production technology of the seamless square tube of high-precision the following steps are included:
Step 1 is heated by square tube blank → perforation → takes the lead → anneals → and pickling → multi-pass cold-drawn (cold rolling) is made accordingly
The round tube pipe of size, this step are the common steps with seamless pipe, can make full use of original seamless pipe production line,
Equipment investment is reduced,
Square tube pipe is made in the round tube pipe 3 short mandrel rod continuous drawings of progress by step 2,
Step 3 by square tube pipe made of the drawing carry out solid solution legal principle removal internal stress, the solid solution method include with
Lower process: the furnace temperature of temperature rope heat-treatment furnace is raised to 1100 degrees Celsius with the heating rate of 40 DEG C/h by the first step, second step
It keeps the temperature in the range of 1050 ~ 1150, lasting to keep the temperature, soaking time is determined by the square tube dog-ear thickness, the guarantor
The warm time is 2min/mm, and the light salt brine cold quenching for the use of concentration being 5% after third step heat preservation is to room temperature, in steel duct
Uniform and stable austenite recrystallization is formed, is enhanced product performance.
Square tube pipe after heat treatment is carried out fast flaw detection using supersonic detector by step 4, prevents internal appearance
The defects of small bubble.
Step 5 aligns the square tube pipe, is corrected to square tube inner and outer pipes line, forms standard section.
The square tube pipe is carried out acid wash passivation by step 6, and a passivating film is formed outside square tube, prevents soda acid rotten
Erosion.
Finished product is made in square tube pipe accurate grinding polishing after passivation by step 7, and then product is put into lubrication groove
1h forms lubricating protective film on square tube surface, improves the time of storage.
Embodiment 2
Step 1 is heated by square tube blank → perforation → takes the lead → anneals → and pickling → multi-pass cold-drawn (cold rolling) is made accordingly
The round tube pipe of size, this step are the common steps with seamless pipe, can make full use of original seamless pipe production line,
Equipment investment is reduced,
Square tube pipe is made in the round tube pipe 3 short mandrel rod continuous drawings of progress by step 2,
Step 3 by square tube pipe made of the drawing carry out solid solution legal principle removal internal stress, the solid solution method include with
Lower process: the furnace temperature of temperature rope heat-treatment furnace is raised to 1100 degrees Celsius with the heating rate of 50 DEG C/h by the first step, second step
It keeps the temperature in the range of 1050 ~ 1150, lasting to keep the temperature, soaking time is determined by the square tube dog-ear thickness, the guarantor
The warm time is 2min/mm, and the light salt brine cold quenching for the use of concentration being 8% after third step heat preservation is to room temperature, in steel duct
Uniform and stable austenite recrystallization is formed, is enhanced product performance.
Square tube pipe after heat treatment is carried out fast flaw detection using supersonic detector by step 4, prevents internal appearance
The defects of small bubble.
Step 5 aligns the square tube pipe, is corrected to square tube inner and outer pipes line, forms standard section.
The square tube pipe is carried out acid wash passivation by step 6, and a passivating film is formed outside square tube, prevents soda acid rotten
Erosion.
Finished product is made in square tube pipe accurate grinding polishing after passivation by step 7, and then product is put into lubrication groove
3h forms lubricating protective film on square tube surface, improves the time of storage.
Embodiment 3
Step 1 is heated by square tube blank → perforation → takes the lead → anneals → and pickling → multi-pass cold-drawn (cold rolling) is made accordingly
The round tube pipe of size, this step are the common steps with seamless pipe, can make full use of original seamless pipe production line,
Equipment investment is reduced,
Square tube pipe is made in the round tube pipe 3 short mandrel rod continuous drawings of progress by step 2,
Step 3 by square tube pipe made of the drawing carry out solid solution legal principle removal internal stress, the solid solution method include with
Lower process: the furnace temperature of temperature rope heat-treatment furnace is raised to 1100 degrees Celsius with the heating rate of 45 DEG C/h by the first step, second step
It keeps the temperature in the range of 1050 ~ 1150, lasting to keep the temperature, soaking time is determined by the square tube dog-ear thickness, the guarantor
The warm time is 2min/mm, and the light salt brine cold quenching for the use of concentration being 3% after third step heat preservation is to room temperature, in steel duct
Uniform and stable austenite recrystallization is formed, is enhanced product performance.
Square tube pipe after heat treatment is carried out fast flaw detection using supersonic detector by step 4, prevents internal appearance
The defects of small bubble.
Step 5 aligns the square tube pipe, is corrected to square tube inner and outer pipes line, forms standard section.
The square tube pipe is carried out acid wash passivation by step 6, and a passivating film is formed outside square tube, prevents soda acid rotten
Erosion.
Finished product is made in square tube pipe accurate grinding polishing after passivation by step 7, and then product is put into lubrication groove
2h forms lubricating protective film on square tube surface, improves the time of storage.
The detection of stainless steel square tube weatherability:
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to be said using the present invention
Equivalent structure or equivalent flow shift made by bright book content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (7)
1. a kind of production technology of the seamless square tube of high-precision, which is characterized in that the production technology packet of the seamless square tube of high-precision
Include following steps:
Step 1 is heated by square tube blank → perforation → takes the lead → anneals → and pickling → multi-pass cold-drawn (cold rolling) is made accordingly
The round tube pipe of size,
The round tube pipe is carried out multiple drawing and square tube pipe is made by step 2,
Square tube pipe made of the drawing is carried out heat treatment removal internal stress by step 3,
Step 4 detects a flaw the square tube pipe after heat treatment,
Step 5 aligns the square tube pipe,
The pipe is carried out acid wash passivation by step 6,
Finished product is made in square tube pipe accurate grinding polishing after passivation by step 7.
2. the production technology of the seamless square tube of high-precision according to claim 1, which is characterized in that round tube in the step 2
The number of drawing is 3 times.
3. the production technology of the seamless square tube of high-precision according to claim 1, which is characterized in that drawn in the step two
Draw out method continuously serves as a contrast for short mandrel rod and pulls out method.
4. the production technology of the seamless square tube of high-precision according to claim 1, which is characterized in that the step three kind
Heat treatment process is solid solution method treatment process, and the solid solution method includes three heating, heat preservation and quenching steps, the heating stepses
40 ~ 50 DEG C/min of the rate of heat addition, heating terminal be 1100 DEG C, step 2 be heat preservation, the holding temperature be 1050 ~ 1150
DEG C, soaking time is determined according to square tube corner wall thickness, and the soaking time is 2min/mm, and step 3 is to be quickly cooled down step,
Rapid quenching cooling is carried out to square tube using liquid, to form austenite recrystallization.
5. the production technology of the seamless square tube of high-precision according to claim 4, which is characterized in that the rapid chilling section makes
Hardening media is the salt water that concentration is 3% ~ 8%.
6. the production technology of the seamless square tube of high-precision according to claim 1, which is characterized in that the flaw detection step uses
Method be supermarket's wave inspection method.
7. the production technology of the seamless square tube of high-precision according to claim 1, which is characterized in that the step 7
The seamless square tube of manufactured finished product high-precision also needs to be put into progress surface lubrication processing in lubrication groove, and lubrication time is 1 ~ 3h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811645846.5A CN109664076A (en) | 2018-12-30 | 2018-12-30 | A kind of production technology of the seamless square tube of high-precision |
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| CN201811645846.5A CN109664076A (en) | 2018-12-30 | 2018-12-30 | A kind of production technology of the seamless square tube of high-precision |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142575A (en) * | 2019-06-20 | 2019-08-20 | 深圳市三鑫科技发展有限公司 | A kind of processing method of exquisiteness right angle steel pipe |
| CN110778803A (en) * | 2019-10-30 | 2020-02-11 | 西安圣泰金属材料有限公司 | Thin-wall high-precision titanium alloy seamless square and rectangular pipe and manufacturing method and application thereof |
| CN111015375A (en) * | 2019-12-17 | 2020-04-17 | 无锡隆达金属材料有限公司 | Method for removing straightening residual stress of nickel base pipe by polishing |
| CN115430995A (en) * | 2022-09-05 | 2022-12-06 | 攀钢集团成都钢钒有限公司 | Manufacturing method of 50Mn18Cr4V nonmagnetic steel pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110142575A (en) * | 2019-06-20 | 2019-08-20 | 深圳市三鑫科技发展有限公司 | A kind of processing method of exquisiteness right angle steel pipe |
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| CN111015375A (en) * | 2019-12-17 | 2020-04-17 | 无锡隆达金属材料有限公司 | Method for removing straightening residual stress of nickel base pipe by polishing |
| CN115430995A (en) * | 2022-09-05 | 2022-12-06 | 攀钢集团成都钢钒有限公司 | Manufacturing method of 50Mn18Cr4V nonmagnetic steel pipe |
| CN115430995B (en) * | 2022-09-05 | 2024-05-24 | 攀钢集团成都钢钒有限公司 | Manufacturing method of 50Mn18Cr4V nonmagnetic steel pipe |
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