CN102294456B - Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank - Google Patents
Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank Download PDFInfo
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- CN102294456B CN102294456B CN 201110234189 CN201110234189A CN102294456B CN 102294456 B CN102294456 B CN 102294456B CN 201110234189 CN201110234189 CN 201110234189 CN 201110234189 A CN201110234189 A CN 201110234189A CN 102294456 B CN102294456 B CN 102294456B
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 62
- 239000010959 steel Substances 0.000 title claims abstract description 62
- 238000005096 rolling process Methods 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 238000009750 centrifugal casting Methods 0.000 claims abstract description 12
- 238000010301 surface-oxidation reaction Methods 0.000 claims abstract description 10
- 238000003754 machining Methods 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims description 18
- 238000003801 milling Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 12
- 238000010791 quenching Methods 0.000 claims description 9
- 230000000171 quenching effect Effects 0.000 claims description 9
- 238000009785 tube rolling Methods 0.000 claims description 8
- 230000002950 deficient Effects 0.000 claims description 7
- 230000036760 body temperature Effects 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000011084 recovery Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Abstract
The invention provides a manufacturing method for the oblique rolling of a bimetallic compound seamless steel pipe by a centrifugal blank, which comprises the following steps: producing a bimetallic compound circular pipe blank on a centrifugal pipe die by adopting a centrifugal casting process and pushing a pipe when the temperature of an inner-layer metal layer is 950 to 1400 DEG C; carrying out heat treatment on the bimetallic compound circular pipe blank according to the purpose of the bimetallic compound circular pipe; carrying out machining or surface oxidation treatment on the pipe blank according to the purpose after rolling; rolling the bimetallic compound circular pipe blank by adopting an oblique rolling machine set; and carrying out the heat treatment on the bimetallic compound circular pipe blank after being rolled. According to the manufacturing method for the oblique rolling of the bimetallic compound seamless steel pipe by the centrifugal blank in the production of an oblique rolling process, which is adopted by the invention, crystal grains are thinned by the centrifugal blank through the deformation of each passage of the oblique rolling machine set, and the integral performance of the seamless steel pipe is enhanced. Meanwhile, the bonding strength between two layers of metal of the bimetallic compound seamless steel pipe with the oblique rolling of the centrifugal blank is ensured by adopting the centrifugal blank and the oblique rolling process, the processing cost is also lowered, and the metal yield is enhanced.
Description
Technical field
The present invention relates to the manufacturing field, relate in particular to a kind of manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank.
Background technology
China is big steel country, and the stainless-steel seamless pipe production history in more than 40 year is arranged.Particularly the production technology of nearest 20 years stainless-steel seamless pipes has had significant progress.But compare with international most advanced level, China's stainless steel tube still has larger gap at aspects such as production technology, equipment, operating technology, product qualities.
The manufacture method of existing bimetallic composite seamless steel pipe comprises explosive forming composite manufacturing method, nested moulding composite manufacturing method etc.These general manufacture methods all are to adopt two kinds of finished product seamless steel pipes to make.Adopt centrifugal casting compound circular tube base and produce bimetallic composite seamless steel pipe by extrusion process, this manufacture method is highly suitable for wherein, and one deck is the high-end multiple tubes such as nickel-base alloy, but because its manufacturing technical feature causes lumber recovery low, recovery rate of iron is lower, and cost is high, has limited its application.And other combination process are because the defectives such as basic unit and multiple layer bond strength only are applied to the low side field.
Summary of the invention
In order to solve the defective of the manufacture method of bimetallic composite seamless steel pipe in the prior art, the objective of the invention is to propose the manufacture method of a kind of more economy, the better oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank of product quality.
For achieving the above object, embodiments of the invention have proposed a kind of manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank, comprising:
Step 1, adopt centrifugal casting technique to produce bimetallic compound circular tube base at centrifugal pipe die, and when inner layer metal layer temperature is 950～1400 ℃ ejector sleeve;
Step 2, according to the purposes of bimetallic compound circular tube, bimetallic compound circular tube base is heat-treated;
Step 3, according to the purposes after rolling, pipe is carried out machined or surface oxidation treatment;
Step 4, adopt the oblique milling unit to be rolled to bimetallic compound circular tube base;
Step 5, the bimetallic compound circular tube base after rolling is heat-treated.
Described outer pipe is the 16MnV Steel material, and the internal layer pipe is the GCr15 Steel material.
Preferred as such scheme, described step 2 is specially:
Step 21, bimetallic compound circular tube base is sent into the heat treatment of annealing in the hot charging stove, temperature is 750～850 ℃ during annealing;
Step 22, insulation 8～12 hours, furnace cooling.
Described step 4 is specially:
Bimetallic compound circular tube base is heated to 1150 ℃～1280 ℃ in rotary heating furnace; Then at the enterprising eleven punch 11 of oblique milling unit, tube rolling, decide reducing and rolling.
Described step 5 is specially:
Step 51, the composite seamless steel pipe after rolling should be carried out temperature correction, the body temperature during temperature correction≤150 ℃;
Step 52, the composite seamless steel pipe after rolling will be carried out Quenching Treatment, the temperature of quenching is 850～950 ℃; Then the oil of quenching; Then carry out temper, temperature is 150～200 ℃.
Further technical scheme, described outer pipe is the 14MnV Steel material, the internal layer pipe is the 316L Steel material.
Preferred as such scheme, described step 2 is specially:
Ejector sleeve when the internal layer temperature is not less than 1200 ℃ is to the solution treatment of spraying water in the bimetallic compound circular tube base.
Described step 4 is specially:
Bimetallic compound circular tube base is heated to 1120 ℃～1200 ℃ in rotary heating furnace; Then at the enterprising eleven punch 11 of oblique milling unit, tube rolling, decide reducing and rolling.
Described step 5 is specially:
Step 51 ', the composite seamless steel pipe after rolling should be carried out temperature correction, the body temperature during temperature correction≤150 ℃;
Step 52 ', rolling rear internal layer Technology for Heating Processing: 1050～1200 ℃ are carried out solid solution to the internal layer pipe, outer Technology for Heating Processing: be heated to after 850 ℃～950 ℃, in air, cool off and drop to room temperature, and then be heated to 600 ℃～700 ℃, in air, cool off again and drop to room temperature.
Preferred as technique scheme also comprises between described step 2 and the step 3:
Step a, centrifugal pipe surfaces externally and internally and both ends of the surface are carried out machining, so that surfaces externally and internally and both ends of the surface surpass the defective of 1mm gash or carry out surface oxidation treatment according to purposes.
The manufacture method of the oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank of the embodiment of the invention, mainly be to consider that present multiple tube industry adopts the bond strength between its double-level-metal of multiple tube that mechanical combination process produces lower, and adopt centrifugal casting technique to add the composite seamless steel pipe that extrusion process is produced, the extrusion process cost is higher, recovery rate of iron is low, only being confined to high-end product uses, and the oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank manufacture method that the oblique roll process that the present invention adopts is produced, centrifugal blank is through the distortion of each passage of oblique milling unit, refinement crystal grain, improved the overall performance of seamless steel pipe, simultaneously, adopt centrifugal blank to add bond strength between the double layer of metal that oblique roll process both guaranteed oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank, reduced again processing cost, improved recovery rate of iron.
In the present invention, this centrifugal blank (centrifugal blank is for adopting the bimetal clad pipe blank of centrifugal casting explained hereafter) adds the process that oblique roll process is produced bimetallic composite seamless steel pipe, and its ectonexine of compound circular tube base of centrifugal casting can use different materials to carry out any combination according to customer requirements.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of first embodiment of the invention;
Fig. 2 is the schematic flow sheet of second embodiment of the invention;
Fig. 3 is the schematic flow sheet of third embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing of the present invention, technical scheme of the present invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The first embodiment
First embodiment of the invention has proposed a kind of manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank, and its flow process comprises as shown in Figure 1:
The manufacture method of the oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank of the embodiment of the invention, mainly be to consider that present multiple tube industry adopts the bond strength between its double-level-metal of multiple tube that mechanical combination process produces lower, and adopt centrifugal casting technique to add the composite seamless steel pipe that extrusion process is produced, the extrusion process cost is higher, recovery rate of iron is low, only being confined to high-end product uses, and the oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank manufacture method that the oblique roll process that the present invention adopts is produced, centrifugal blank is through the distortion of each passage of oblique milling unit, refinement crystal grain, improved the overall performance of seamless steel pipe, simultaneously, adopt centrifugal blank to add bond strength between the double layer of metal that oblique roll process both guaranteed oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank, reduced again processing cost, improved recovery rate of iron.
The second embodiment
Second embodiment of the invention has proposed a kind of manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank, for the manufacture of 16MnV and GCr15 oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank.Outward, interior thickness is respectively 36.5 mm, 18.5 mm, the pipe diameter is 210mm, length is 2009mm.Flow process comprises as shown in Figure 2:
The manufacture method of the oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank of the embodiment of the invention, the production tube wall thickness, the external diameter tolerance that produce are little.Simultaneously, the product surface quality that produces in this way is good, and stock utilization is high.
The 3rd embodiment
Third embodiment of the invention has also proposed a kind of manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank, for the manufacture of 14MnV and 316L oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank.Outward, interior thickness is respectively 39 mm, 14mm, the pipe diameter is 210mm, length is 1995mm.Flow process comprises as shown in Figure 3:
The manufacture method of the oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank of the embodiment of the invention, the production tube wall thickness, the external diameter tolerance that produce are little.Simultaneously, the product surface quality that produces in this way is good, and stock utilization is high.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.
Claims (8)
1. the manufacture method of an oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank is characterized in that, comprising:
Step 1, adopt centrifugal casting technique to produce bimetallic compound circular tube base at centrifugal pipe die, and when inner layer metal layer temperature is 950～1400 ℃ ejector sleeve; The outer pipe of described bimetallic compound circular tube base is the 16MnV Steel material, and the internal layer pipe is the GCr15 Steel material;
Step 2, according to the purposes of bimetallic compound circular tube, bimetallic compound circular tube base is heat-treated; The heat treatment of at first bimetallic compound circular tube base hot charging stove being annealed, temperature is 750～850 ℃ during annealing; Then with bimetallic compound circular tube base insulation 8～12 hours, furnace cooling;
Step 3, according to the purposes after rolling, pipe is carried out machined or surface oxidation treatment;
Step 4, adopt the oblique milling unit to be rolled to bimetallic compound circular tube base;
Step 5, the bimetallic compound circular tube base after rolling is heat-treated.
2. the manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank according to claim 1 is characterized in that, described step 4 is specially: bimetallic compound circular tube base is heated to 1150 ℃～1280 ℃ in rotary heating furnace; Then at the enterprising eleven punch 11 of oblique milling unit, tube rolling, decide reducing and rolling.
3. the manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank according to claim 1 is characterized in that, described step 5 is specially:
Step 51, the composite seamless steel pipe after rolling should be carried out temperature correction, the body temperature during temperature correction≤150 ℃;
Step 52, the composite seamless steel pipe after rolling will be carried out Quenching Treatment, the temperature of quenching is 850～950 ℃; Then the oil of quenching; Then carry out temper, temperature is 150～200 ℃.
4. the manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank according to claim 1, it is characterized in that, also comprise the step of centrifugal pipe surfaces externally and internally and both ends of the surface being carried out machining between described step 2 and the step 3, so that surfaces externally and internally and both ends of the surface surpass the defective of 1mm gash or carry out surface oxidation treatment according to purposes.
5. the manufacture method of an oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank is characterized in that, comprising:
Step 1, adopt centrifugal casting technique to produce bimetallic compound circular tube base at centrifugal pipe die, and when inner layer metal layer temperature is 950～1400 ℃ ejector sleeve; The outer pipe of described bimetallic compound circular tube base is the 14MnV Steel material, and the internal layer pipe is the 316L Steel material;
Step 2, according to the purposes of bimetallic compound circular tube, bimetallic compound circular tube base is heat-treated, be specially: ejector sleeve when the internal layer temperature is not less than 1200 ℃, to the solution treatment of spraying water in the bimetallic compound circular tube base;
Step 3, according to the purposes after rolling, pipe is carried out machined or surface oxidation treatment;
Step 4, adopt the oblique milling unit to be rolled to bimetallic compound circular tube base;
Step 5, the bimetallic compound circular tube base after rolling is heat-treated.
6. the manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank according to claim 5 is characterized in that, described step 4 is specially: bimetallic compound circular tube base is heated to 1120 ℃～1200 ℃ in rotary heating furnace; Then at the enterprising eleven punch 11 of oblique milling unit, tube rolling, decide reducing and rolling.
7. the manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank according to claim 5 is characterized in that, described step 5 is specially: step 51 ', the composite seamless steel pipe after rolling should be carried out temperature correction, the body temperature during temperature correction≤150 ℃; Step 52 ', rolling rear internal layer Technology for Heating Processing: 1050～1200 ℃ are carried out solid solution to the internal layer pipe, outer Technology for Heating Processing: be heated to after 850 ℃～950 ℃, in air, cool off and drop to room temperature, and then be heated to 600 ℃～700 ℃, in air, cool off again and drop to room temperature.
8. the manufacture method of oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank according to claim 5, it is characterized in that, also comprise the step of centrifugal pipe surfaces externally and internally and both ends of the surface being carried out machining between described step 2 and the step 3, so that surfaces externally and internally and both ends of the surface surpass the defective of 1mm gash or carry out surface oxidation treatment according to purposes.
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| CN 201110234189 CN102294456B (en) | 2011-08-16 | 2011-08-16 | Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank |
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| CN 201110234189 CN102294456B (en) | 2011-08-16 | 2011-08-16 | Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102553962A (en) * | 2012-01-30 | 2012-07-11 | 新兴铸管股份有限公司 | Rolling forming method for centrifugal casting composite pipe |
| CN102688887B (en) * | 2012-06-13 | 2014-09-17 | 新兴铸管股份有限公司 | Concrete pump pipe and method for producing metallurgy composite bimetallic concrete pump pipe by diagonal rolling technology |
| CN102703673A (en) * | 2012-07-13 | 2012-10-03 | 新兴铸管股份有限公司 | Heat treatment method for double-layer steel pipe |
| CN102732701A (en) * | 2012-07-17 | 2012-10-17 | 新兴铸管股份有限公司 | Method for carrying out quenching on bimetal tube with outer low-carbon steel layer and inner high-carbon-chromium bearing steel layer |
| CN103286157B (en) * | 2013-06-08 | 2015-06-03 | 新兴铸管股份有限公司 | Hot rolling method of metallurgical bonding wear-resistant composite tube |
| CN103286156B (en) * | 2013-06-08 | 2015-05-27 | 新兴铸管股份有限公司 | Oblique rolling molding process of double-layered steel pipe |
| CN103706665A (en) * | 2013-12-09 | 2014-04-09 | 天津钢管集团股份有限公司 | Method for manufacturing bimetal composite pipe by cross piercing process |
| CN104148437A (en) * | 2014-06-29 | 2014-11-19 | 柳州美纳机械有限公司 | Production method of double-metal composite pipe |
| CN104084563A (en) * | 2014-07-15 | 2014-10-08 | 安庆银泰轴承有限公司 | Material and method for manufacturing composite bimetallic bearing |
| CN104190901A (en) * | 2014-07-28 | 2014-12-10 | 宁国市大泉机械有限公司 | Machining method of seamless steel tube |
| CN106735039B (en) * | 2016-12-07 | 2018-11-13 | 武汉理工大学 | A kind of bimetal centrifugal is cast the control method of compound inner tube layer stress |
| CN108723574A (en) * | 2018-06-21 | 2018-11-02 | 马晓峰 | Seamless composite steel tube and its production technology |
| CN114769322B (en) * | 2022-06-20 | 2022-10-04 | 太原科技大学 | Hot rolling schedule optimization method for bimetal composite seamless steel pipe |
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| IN154618B (en) * | 1980-12-22 | 1984-11-17 | Abex Corp | |
| JPS6076263A (en) * | 1983-10-03 | 1985-04-30 | Nippon Kokan Kk <Nkk> | Manufacturing method for composite metal materials |
| CN100507058C (en) * | 2006-09-13 | 2009-07-01 | 宝山钢铁股份有限公司 | A kind of high-strength 13Cr oil casing steel and its manufacturing method |
| CN100491063C (en) * | 2006-09-21 | 2009-05-27 | 攀钢集团四川长城特殊钢有限责任公司 | A method of manufacturing a metal composite seamless pipe with metallurgical bonding |
| CN101804450B (en) * | 2010-04-08 | 2011-11-09 | 新兴铸管股份有限公司 | 20/321H corrosion-resisting double-metal composite tube and manufacturing process thereof |
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