CN105364412A - Manufacturing method of cold-drawn high-strength fine-boring rolled pipe - Google Patents
Manufacturing method of cold-drawn high-strength fine-boring rolled pipe Download PDFInfo
- Publication number
- CN105364412A CN105364412A CN201410446485.7A CN201410446485A CN105364412A CN 105364412 A CN105364412 A CN 105364412A CN 201410446485 A CN201410446485 A CN 201410446485A CN 105364412 A CN105364412 A CN 105364412A
- Authority
- CN
- China
- Prior art keywords
- pipe
- cold
- drawn
- rolling
- annealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a manufacturing method of a cold-drawn high-strength fine-boring rolled pipe. The manufacturing method comprises the following steps of heating, wherein a pipe blank is heated in a circular furnace; perforating, wherein the heated pipe blank is perforated by a perforating machine; annealing, wherein the pipe blank is annealed; borax spraying, wherein oxide skin is removed; hot rolling, wherein the annealed pipe blank is guided into a pipe rolling machine for hot rolling; sizing, wherein the rolled pipe formed after continuous rolling is subjected to sizing through a sizing mill; stress relief annealing, wherein the rolled pipe is guided into a heating furnace to be heated to obtain the annealed pipe blank; acid pickling treatment, wherein rust scales on the surface are removed; phosphating treatment, wherein a chemical generation film of zinc phosphate is formed on the surface; saponification treatment, wherein metallic soap and the like are formed to lubricate the film; primary cold-drawing, wherein the pipe blank to be cold-drawn is cold-drawn; secondary cold-drawing, wherein the cold-drawn pipe subjected to primary cold-drawing is subjected to secondary cold-drawing to obtain the cold-drawn pipe; normalizing and air cooling treatment; straightening treatment; induction furnace quenching treatment; and fine-boring rolling. Thus, the fine-boring rolled pipe is obtained. The fine-boring rolled pipe obtained through the method is high in yield strength and tensile strength.
Description
Technical field
The invention belongs to steel pipe preparing technical field, be specifically related to a kind of manufacture method of cold-drawn high-strength fine boring and rolling pipe.
Background technology
As the cold process of the steel for mechanical structure pipes such as carbon steel, alloy steel or stainless steel, there are known the drawing processing method of being undertaken by drawbench and the rolling processing method of being undertaken by Pierre's form milling train.Wherein, the drawing processing method of being undertaken by drawbench, compared with the rolling processing method of carrying out with machine of being pricked by Pierre's form, cold working steel pipe can be manufactured expeditiously, this seamless steel pipe is used for oil hydraulic cylinder, pneumatic cylinder uses, and at present, most Hi-grade steel its yield strength, dimensional discrepancy etc. of domestic current prescribed by standard all cannot meet the instructions for use of actual oil hydraulic cylinder, pneumatic cylinder, make the oil hydraulic cylinder of China, pneumatic cylinder seamless steel pipe can only dependence on import, constrain the development of China's cold tube rolling.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of manufacture method of cold-drawn high-strength fine boring and rolling pipe is provided, improve the wearability on surface, case hardness and intensity improve, improve the wearability of surface of the work, corrosion resistance and conformability, oil cylinder service life, yield strength is high, tensile strength is high.
According to technical scheme provided by the invention, a kind of manufacture method of cold-drawn high-strength fine boring and rolling pipe comprises the steps:
(1), heating: 27SiMn pipe is heated to 1300 ~ 1320 DEG C in annular furnace, and the heat time is 3 ~ 5 hours, thus ensures that heating of pipe blank is even;
(2), bore a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1250 ~ 1280 DEG C, and order control punch eccentricity and control pipe surface quality;
(3), annealing: introduced in continuous annealing furnace by pipe and anneal, and order control annealing temperature is 700 ~ 720 DEG C, annealing time is 50 ~ 60min, obtains the annealing pipe that annealing hardness (HV) is 210 ~ 220;
(4), borax is sprayed: spray borax device blows to the descaling of hollow billet endoporus nitrogen and borax through spiral nozzle and fill nitrogen in hollow billet, its main function is removed by the residual oxidization skin in hollow billet, form a skim at the inner surface of hollow billet simultaneously, prevent hollow billet to be further oxidized;
(5), hot rolling: pipe of annealing introduces pipe mill hot rolling, and hot-rolled temperature is 1220 ~ 1250 DEG C, obtains rolled pipe;
(6), sizing: the rolled pipe formed after tandem rolling is again through sizing mill sizing, and form steel pipe, finishing temperature control during sizing is at 880 ~ 890 DEG C;
(7), stress relief annealing: rolled pipe introduced heating in heating furnace and be incubated, come out of the stove with after stove cooling, obtain pipe of annealing, object is the intensity guaranteeing steel pipe, when annealing temperature is too high, processing strain recovers, can not obtain the effect of work hardening, annealing temperature is 610 ~ 650 DEG C, can obtain the effect of work hardening, in order to remove the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 60 ~ 70 minutes;
(8), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 7 ~ 19%, pickling time: 35 ~ 60 minutes, then neutralization pond rolling, rolling number of times: 2 ~ 3 times, neutralizer pH value: 9 ~ 10, then through clear water reserviors rolling, rolling number of times: 2 ~ 3 times;
(9), phosphorating treatment: the chemistry forming trbasic zinc phosphate on the surface of pipe generates overlay film, trbasic zinc phosphate concentration: 20 ~ 30%, Phosphating Solution temperature: 68 ~ 75 DEG C, phosphating time: 10 ~ 20 minutes, Phosphating Solution free acidity: 4 ~ 7, General Acidity in Phosphating Solution: 45 ~ 75;
(10), saponification process: form the lubricating film coateds such as metallic soap on overlay film, saponification temperature: 55 ~ 75 DEG C, saponification time: 8 ~ 15 minutes, saponification liquor pH value: 8 ~ 9;
(11) a, cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, cold-drawing technology, mould chock plug and bore spacing: 3 ~ 5mm, pull out machine draft: 350 ~ 450t, and saponification pipe pulls out the front storage period: 72 ~ 96h;
(12), secondary cold-drawn: the drawn tube through a cold-drawn carries out secondary cold-drawn processing, cold-drawing technology, mould chock plug and bore spacing: 2 ~ 4mm, pull out machine draft: 400 ~ 500t, and the drawn tube through a cold-drawn pulls out the front storage period: 12 ~ 24h;
(13), normalizing air cooling process: the temperature of normalizing air cooling is 450 ~ 480 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), straightening processing: straightening temperature 350 ~ 380 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 750 ~ 800 DEG C, and hardening media is water, reduces the residual stress of drawn tube;
(16), temper in batch-type furnace: the temperature of tempering air cooling is 300 ~ 400 DEG C, to reduce residual stress;
(17), finish-boring rolling: pass through roll forming, rolling surface forms one deck flow harden layer, decrease elasticity and the plastic deformation of the secondary contact surface of grinding, thus improve the wearability on polished rod surface, case hardness and intensity improve, improve the wearability of surface of the work, corrosion resistance and conformability, obtain yield strength (MPa): 820, tensile strength (MPa): 880, outer diameter tolerance :+0.4, wall thickness tolerance: 7, external diameter out-of-roundness: 0.2, eccentricity: 5, linearity (mm/m): the cold-drawn finish-boring rolling pipe of 0.20.
Beneficial effect of the present invention is as follows: the cold-drawn high-strength fine boring and rolling pipe utilizing the inventive method to produce, improve the wearability on surface, case hardness and intensity improve, and improve the wearability of surface of the work, corrosion resistance and conformability, oil cylinder service life, yield strength is high, tensile strength is high.
Detailed description of the invention:
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment one:
To prepare diameter for 135.3mm and the hole wall wall thickness 27SiMn steel pipe that is 7.23mm, comprise the following steps:
(1), heating: 27SiMn pipe is heated to 1300 DEG C in annular furnace, and the heat time is 3 hours, thus ensures that heating of pipe blank is even;
(2), bore a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1250 DEG C, and order control punch eccentricity is 4%, visualize is carried out to pipe, use remove pipe surface burr, stick up skin, if pipe surface occurs or there is pit that significantly namely naked eyes are obvious, runs over and injure and crackle, then should reject, avoid flowing into subsequent processing, to control pipe surface quality;
(3), annealing: introduced in continuous annealing furnace by pipe and anneal, and order control annealing temperature is 700 DEG C, annealing time is 50min, obtains the annealing pipe that annealing hardness (HV) is 210;
(4), borax is sprayed: spray borax device blows to the descaling of hollow billet endoporus nitrogen and borax through spiral nozzle and fill nitrogen in hollow billet, its main function is removed by the residual oxidization skin in hollow billet, form a skim at the inner surface of hollow billet simultaneously, prevent hollow billet to be further oxidized;
(5), hot rolling: pipe of annealing introduces pipe mill hot rolling, and hot-rolled temperature is 1220 DEG C, obtains rolled pipe;
(6), sizing: the rolled pipe formed after tandem rolling is again through sizing mill sizing, and form steel pipe, finishing temperature control during sizing is at 880 DEG C;
(7), stress relief annealing: rolled pipe introduced heating in heating furnace and be incubated, come out of the stove with after stove cooling, obtain pipe of annealing, object is the intensity guaranteeing steel pipe, when annealing temperature is too high, processing strain recovers, can not obtain the effect of work hardening, annealing temperature is 610 DEG C, can obtain the effect of work hardening, in order to remove the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 60 minutes;
(8), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 7%, pickling time: 35 minutes, then neutralization pond rolls, rolling number of times: 2 times, neutralizer pH value: 9, then roll through clear water reserviors, rolling number of times: 2 times;
(9), phosphorating treatment: the chemistry forming trbasic zinc phosphate on the surface of pipe generates overlay film, trbasic zinc phosphate concentration: 20%, Phosphating Solution temperature: 68 DEG C, phosphating time: 10 minutes, Phosphating Solution free acidity: 4, General Acidity in Phosphating Solution: 45;
(10), saponification process: form the lubricating film coateds such as metallic soap on overlay film, saponification temperature: 55 DEG C, saponification time: 8 minutes, saponification liquor pH value: 8;
(11) a, cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, cold-drawing technology, mould chock plug and bore spacing: 3mm, pull out machine draft: 350t, and saponification pipe pulls out the front storage period: 72h;
(12), secondary cold-drawn: the drawn tube through a cold-drawn carries out secondary cold-drawn processing, cold-drawing technology, and mould chock plug and bore spacing: 2mm, pull out machine draft: 400t, and the drawn tube through a cold-drawn pulls out the front storage period: 12h;
(13), normalizing air cooling process: the temperature of normalizing air cooling is 450 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), straightening processing: straightening temperature 350 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 750 DEG C, and hardening media is water, reduces the residual stress of drawn tube;
(16), temper in batch-type furnace: the temperature of tempering air cooling is 300 DEG C, to reduce residual stress;
(17), finish-boring rolling: pass through roll forming, rolling surface forms one deck flow harden layer, decrease elasticity and the plastic deformation of the secondary contact surface of grinding, thus improve the wearability on polished rod surface, case hardness and intensity improve, improve the wearability of surface of the work, corrosion resistance and conformability, obtain yield strength (MPa): 820, tensile strength (MPa): 880, outer diameter tolerance :+0.4, wall thickness tolerance: 7, external diameter out-of-roundness: 0.2, eccentricity: 5, linearity (mm/m): the cold-drawn high-strength fine boring and rolling pipe of 0.20.
After testing, institute's inspection project meets GB/T3639-2009 standard to the product that the present embodiment obtains, and product is qualified, meets the requirement of user to yield strength, tensile strength, hardness.
The contrast in technical performance of a kind of cold-drawn high-strength fine boring and rolling pipe and conventional steel pipe
Embodiment two:
To prepare diameter for 132.9mm and the hole wall wall thickness 27SiMn steel pipe that is 7.29mm, comprise the following steps:
(1), heating: 27SiMn pipe is heated to 1320 DEG C in annular furnace, and the heat time is 5 hours, thus ensures that heating of pipe blank is even;
(2), bore a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1280 DEG C, and order control punch eccentricity is 4%, visualize is carried out to pipe, use remove pipe surface burr, stick up skin, if pipe surface occurs or there is pit that significantly namely naked eyes are obvious, runs over and injure and crackle, then should reject, avoid flowing into subsequent processing, to control pipe surface quality;
(3), annealing: introduced in continuous annealing furnace by pipe and anneal, and order control annealing temperature is 720 DEG C, annealing time is 60min, obtains the annealing pipe that annealing hardness (HV) is 220;
(4), borax is sprayed: spray borax device blows to the descaling of hollow billet endoporus nitrogen and borax through spiral nozzle and fill nitrogen in hollow billet, its main function is removed by the residual oxidization skin in hollow billet, form a skim at the inner surface of hollow billet simultaneously, prevent hollow billet to be further oxidized;
(5), hot rolling: pipe of annealing introduces pipe mill hot rolling, and hot-rolled temperature is 1250 DEG C, obtains rolled pipe;
(6), sizing: the rolled pipe formed after tandem rolling is again through sizing mill sizing, and form steel pipe, finishing temperature control during sizing is at 890 DEG C;
(7), stress relief annealing: rolled pipe introduced heating in heating furnace and be incubated, come out of the stove with after stove cooling, obtain pipe of annealing, object is the intensity guaranteeing steel pipe, when annealing temperature is too high, processing strain recovers, can not obtain the effect of work hardening, annealing temperature is 650 DEG C, can obtain the effect of work hardening, in order to remove the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 70 minutes;
(8), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 19%, pickling time: 60 minutes, then neutralization pond rolls, rolling number of times: 3 times, neutralizer pH value: 10, then roll through clear water reserviors, rolling number of times: 3 times;
(9), phosphorating treatment: the chemistry forming trbasic zinc phosphate on the surface of pipe generates overlay film, trbasic zinc phosphate concentration: 30%, Phosphating Solution temperature: 75 DEG C, phosphating time: 20 minutes, Phosphating Solution free acidity: 7, General Acidity in Phosphating Solution: 75;
(10), saponification process: form the lubricating film coateds such as metallic soap on overlay film, saponification temperature: 75 DEG C, saponification time: 15 minutes, saponification liquor pH value: 9;
(11) a, cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, cold-drawing technology, mould chock plug and bore spacing: 5mm, pull out machine draft: 450t, and saponification pipe pulls out the front storage period: 96h;
(12), secondary cold-drawn: the drawn tube through a cold-drawn carries out secondary cold-drawn processing, cold-drawing technology, and mould chock plug and bore spacing: 4mm, pull out machine draft: 500t, and the drawn tube through a cold-drawn pulls out the front storage period: 24h;
(13), normalizing air cooling process: the temperature of normalizing air cooling is 480 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), straightening processing: straightening temperature 380 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 800 DEG C, and hardening media is water, reduces the residual stress of drawn tube;
(16), temper in batch-type furnace: the temperature of tempering air cooling is 400 DEG C, to reduce residual stress;
(17), finish-boring rolling: pass through roll forming, rolling surface forms one deck flow harden layer, decrease elasticity and the plastic deformation of the secondary contact surface of grinding, thus improve the wearability on polished rod surface, case hardness and intensity improve, improve the wearability of surface of the work, corrosion resistance and conformability, obtain yield strength (MPa): 830, tensile strength (MPa): 885, outer diameter tolerance :+0.4, wall thickness tolerance: 7, external diameter out-of-roundness: 0.2, eccentricity: 5, linearity (mm/m): the cold-drawn high-strength fine boring and rolling pipe of 0.20.
Embodiment three:
To prepare diameter for 157.4mm and the hole wall wall thickness 27SiMn steel pipe that is 7.92mm, comprise the following steps:
(1), heating: 27SiMn pipe is heated to 1310 DEG C in annular furnace, and the heat time is 4 hours, thus ensures that heating of pipe blank is even;
(2), bore a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1260 DEG C, and order control punch eccentricity is 4%, visualize is carried out to pipe, use remove pipe surface burr, stick up skin, if pipe surface occurs or there is pit that significantly namely naked eyes are obvious, runs over and injure and crackle, then should reject, avoid flowing into subsequent processing, to control pipe surface quality;
(3), annealing: introduced in continuous annealing furnace by pipe and anneal, and order control annealing temperature is 710 DEG C, annealing time is 55min, obtains the annealing pipe that annealing hardness (HV) is 215;
(4), borax is sprayed: spray borax device blows to the descaling of hollow billet endoporus nitrogen and borax through spiral nozzle and fill nitrogen in hollow billet, its main function is removed by the residual oxidization skin in hollow billet, form a skim at the inner surface of hollow billet simultaneously, prevent hollow billet to be further oxidized;
(5), hot rolling: pipe of annealing introduces pipe mill hot rolling, and hot-rolled temperature is 1240 DEG C, obtains rolled pipe;
(6), sizing: the rolled pipe formed after tandem rolling is again through sizing mill sizing, and form steel pipe, finishing temperature control during sizing is at 885 DEG C;
(7), stress relief annealing: rolled pipe introduced heating in heating furnace and be incubated, come out of the stove with after stove cooling, obtain pipe of annealing, object is the intensity guaranteeing steel pipe, when annealing temperature is too high, processing strain recovers, can not obtain the effect of work hardening, annealing temperature is 630 DEG C, can obtain the effect of work hardening, in order to remove the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 65 minutes;
(8), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 13%, pickling time: 45 minutes, then neutralization pond rolling, rolling number of times: 2.5 times, neutralizer pH value: 9.5, then through clear water reserviors rolling, rolling number of times: 2.5 times;
(9), phosphorating treatment: the chemistry forming trbasic zinc phosphate on the surface of pipe generates overlay film, trbasic zinc phosphate concentration: 25%, Phosphating Solution temperature: 70 DEG C, phosphating time: 15 minutes, Phosphating Solution free acidity: 6, General Acidity in Phosphating Solution: 55;
(10), saponification process: form the lubricating film coateds such as metallic soap on overlay film, saponification temperature: 65 DEG C, saponification time: 10 minutes, saponification liquor pH value: 8.5;
(11) a, cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, cold-drawing technology, mould chock plug and bore spacing: 4mm, pull out machine draft: 400t, and saponification pipe pulls out the front storage period: 84h;
(12), secondary cold-drawn: the drawn tube through a cold-drawn carries out secondary cold-drawn processing, cold-drawing technology, and mould chock plug and bore spacing: 3mm, pull out machine draft: 450t, and the drawn tube through a cold-drawn pulls out the front storage period: 18h;
(13), normalizing air cooling process: the temperature of normalizing air cooling is 460 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), straightening processing: straightening temperature 370 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 780 DEG C, and hardening media is water, reduces the residual stress of drawn tube;
(16), temper in batch-type furnace: the temperature of tempering air cooling is 350 DEG C, to reduce residual stress;
(17), finish-boring rolling: pass through roll forming, rolling surface forms one deck flow harden layer, decrease elasticity and the plastic deformation of the secondary contact surface of grinding, thus improve the wearability on polished rod surface, case hardness and intensity improve, improve the wearability of surface of the work, corrosion resistance and conformability, obtain yield strength (MPa): 835, tensile strength (MPa): 883, outer diameter tolerance :+0.4, wall thickness tolerance: 7, external diameter out-of-roundness: 0.2, eccentricity: 5, linearity (mm/m): the cold-drawn high-strength fine boring and rolling pipe of 0.20.
Claims (1)
1. the manufacture method of a cold-drawn high-strength fine boring and rolling pipe comprises the steps:
(1), heating: 27SiMn pipe is heated to 1300 ~ 1320 DEG C in annular furnace, and the heat time is 3 ~ 5 hours, thus ensures that heating of pipe blank is even;
(2), bore a hole: heat pipe base perforated machine is bored a hole, the temperature of the hollow billet formed after perforation controls at 1250 ~ 1280 DEG C, and order control punch eccentricity and control pipe surface quality;
(3), annealing: introduced in continuous annealing furnace by pipe and anneal, and order control annealing temperature is 700 ~ 720 DEG C, annealing time is 50 ~ 60min, obtains the annealing pipe that annealing hardness (HV) is 210 ~ 220;
(4), borax is sprayed: spray borax device blows to the descaling of hollow billet endoporus nitrogen and borax through spiral nozzle and fill nitrogen in hollow billet, its main function is removed by the residual oxidization skin in hollow billet, form a skim at the inner surface of hollow billet simultaneously, prevent hollow billet to be further oxidized;
(5), hot rolling: pipe of annealing introduces pipe mill hot rolling, and hot-rolled temperature is 1220 ~ 1250 DEG C, obtains rolled pipe;
(6), sizing: the rolled pipe formed after tandem rolling is again through sizing mill sizing, and form steel pipe, finishing temperature control during sizing is at 880 ~ 890 DEG C;
(7), stress relief annealing: rolled pipe introduced heating in heating furnace and be incubated, come out of the stove with after stove cooling, obtain pipe of annealing, object is the intensity guaranteeing steel pipe, when annealing temperature is too high, processing strain recovers, can not obtain the effect of work hardening, annealing temperature is 610 ~ 650 DEG C, can obtain the effect of work hardening, in order to remove the strength variance of cold tube rolling, in the stove of cold tube rolling, the retention time is 60 ~ 70 minutes;
(8), pickling processes: annealing pipe is carried out pickling, removes the scale on surface, concentration of hydrochloric acid: 7 ~ 19%, pickling time: 35 ~ 60 minutes, then neutralization pond rolling, rolling number of times: 2 ~ 3 times, neutralizer pH value: 9 ~ 10, then through clear water reserviors rolling, rolling number of times: 2 ~ 3 times;
(9), phosphorating treatment: the chemistry forming trbasic zinc phosphate on the surface of pipe generates overlay film, trbasic zinc phosphate concentration: 20 ~ 30%, Phosphating Solution temperature: 68 ~ 75 DEG C, phosphating time: 10 ~ 20 minutes, Phosphating Solution free acidity: 4 ~ 7, General Acidity in Phosphating Solution: 45 ~ 75;
(10), saponification process: form the lubricating film coateds such as metallic soap on overlay film, saponification temperature: 55 ~ 75 DEG C, saponification time: 8 ~ 15 minutes, saponification liquor pH value: 8 ~ 9;
(11) a, cold-drawn: will treat that cold-drawn pipe carries out cold-drawn processing, cold-drawing technology, mould chock plug and bore spacing: 3 ~ 5mm, pull out machine draft: 350 ~ 450t, and saponification pipe pulls out the front storage period: 72 ~ 96h;
(12), secondary cold-drawn: the drawn tube through a cold-drawn carries out secondary cold-drawn processing, cold-drawing technology, mould chock plug and bore spacing: 2 ~ 4mm, pull out machine draft: 400 ~ 500t, and the drawn tube through a cold-drawn pulls out the front storage period: 12 ~ 24h;
(13), normalizing air cooling process: the temperature of normalizing air cooling is 450 ~ 480 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), straightening processing: straightening temperature 350 ~ 380 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 750 ~ 800 DEG C, and hardening media is water, reduces the residual stress of drawn tube;
(16), temper in batch-type furnace: the temperature of tempering air cooling is 300 ~ 400 DEG C, to reduce residual stress;
(17), finish-boring rolling: pass through roll forming, rolling surface forms one deck flow harden layer, decrease elasticity and the plastic deformation of the secondary contact surface of grinding, thus improve the wearability on polished rod surface, case hardness and intensity improve, improve the wearability of surface of the work, corrosion resistance and conformability, obtain yield strength (MPa): 820, tensile strength (MPa): 880, outer diameter tolerance :+0.4, wall thickness tolerance: 7, external diameter out-of-roundness: 0.2, eccentricity: 5, linearity (mm/m): the cold-drawn high-strength fine boring and rolling pipe of 0.20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410446485.7A CN105364412A (en) | 2014-08-30 | 2014-08-30 | Manufacturing method of cold-drawn high-strength fine-boring rolled pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410446485.7A CN105364412A (en) | 2014-08-30 | 2014-08-30 | Manufacturing method of cold-drawn high-strength fine-boring rolled pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105364412A true CN105364412A (en) | 2016-03-02 |
Family
ID=55367301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410446485.7A Pending CN105364412A (en) | 2014-08-30 | 2014-08-30 | Manufacturing method of cold-drawn high-strength fine-boring rolled pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105364412A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623754A (en) * | 2016-12-09 | 2017-05-10 | 无锡市天洋锻造有限公司 | Manufacture technique of wrought brass oxygen lance sprayer |
| CN107627078A (en) * | 2017-09-26 | 2018-01-26 | 德清广汇金属材料有限公司 | A kind of preparation method of tire back-up ring raw material |
| CN109487168A (en) * | 2018-12-28 | 2019-03-19 | 张家港华程特种材料股份有限公司 | Processing method for making the high strength steel and its drawn tube of galvanized part |
| CN112108530A (en) * | 2020-09-04 | 2020-12-22 | 江苏宏亿钢管有限公司 | Manufacturing method of high-strength cold-drawn steel pipe |
| CN113699343A (en) * | 2021-07-30 | 2021-11-26 | 江苏华程工业制管股份有限公司 | Heat treatment method for bearing steel pipe |
-
2014
- 2014-08-30 CN CN201410446485.7A patent/CN105364412A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623754A (en) * | 2016-12-09 | 2017-05-10 | 无锡市天洋锻造有限公司 | Manufacture technique of wrought brass oxygen lance sprayer |
| CN107627078A (en) * | 2017-09-26 | 2018-01-26 | 德清广汇金属材料有限公司 | A kind of preparation method of tire back-up ring raw material |
| CN109487168A (en) * | 2018-12-28 | 2019-03-19 | 张家港华程特种材料股份有限公司 | Processing method for making the high strength steel and its drawn tube of galvanized part |
| CN112108530A (en) * | 2020-09-04 | 2020-12-22 | 江苏宏亿钢管有限公司 | Manufacturing method of high-strength cold-drawn steel pipe |
| CN113699343A (en) * | 2021-07-30 | 2021-11-26 | 江苏华程工业制管股份有限公司 | Heat treatment method for bearing steel pipe |
| CN113699343B (en) * | 2021-07-30 | 2022-09-09 | 江苏华程工业制管股份有限公司 | Heat treatment method for bearing steel pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104338777A (en) | Production method of cold-drawn precision seamless steel pipes | |
| CN104551669A (en) | Production method of cold-drawn high-precision seamless steel tube | |
| CN104338779A (en) | A method for manufacturing a high-precision cold-drawn steel pipe | |
| CN104551667A (en) | Cold-rolled high-hardness seamless steel pipe manufacturing method | |
| CN105364412A (en) | Manufacturing method of cold-drawn high-strength fine-boring rolled pipe | |
| CN104338780A (en) | Method for manufacturing high-strength cold-drawn steel tube | |
| CN104338778A (en) | Method for manufacturing precise inner hole honing tube | |
| CN105363825A (en) | Manufacturing method of cold-drawn high-precision cylinder barrel pipe | |
| CN105880934A (en) | Manufacturing method for high-precision cold-drawn inner-hole honed pipe | |
| CN107282839A (en) | A kind of forging technology of forging | |
| CN105945537A (en) | Forging technology for idle gear for automobile engine | |
| CN102274854A (en) | Process for manufacturing superascoloy stainless steel tube | |
| CN105986074A (en) | Die steel processing technology | |
| CN104759834A (en) | Hot-rolled high-strength oil pipe manufacturing method | |
| CN107755454A (en) | A kind of manufacture method of high-strength corrosion-resisting drawn tube for marine settings engineering | |
| CN104338781A (en) | Method for manufacturing high-hardness cold-drawn steel tube | |
| CN102921763A (en) | Seamless steel tube processing technology | |
| CN105880920A (en) | Cold drawing precision honing tube manufacture method | |
| CN102861784B (en) | Mid-carbon, nickel, chromium, molybdenum and vanadium alloy steel seamless tube and production method therefore | |
| CN104759832A (en) | Manufacturing method of hot-rolled high-collapse-resistance petroleum pipe | |
| CN104551540A (en) | Production method of cold-drawn precise cylinder tube | |
| CN102632102A (en) | Machining method of abnormal tubular product for lift control switch | |
| CN107096806A (en) | A kind of processing method of high-strength accurate steel pipe | |
| CN104759888A (en) | Manufacturing method of hot-rolled high-hardness petroleum pipe | |
| CN107649840A (en) | A kind of production technology of jack adjustment threaded rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160302 |
|
| WD01 | Invention patent application deemed withdrawn after publication |