CN105363825A - Manufacturing method of cold-drawn high-precision cylinder barrel pipe - Google Patents
Manufacturing method of cold-drawn high-precision cylinder barrel pipe Download PDFInfo
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Abstract
The invention relates to a manufacturing method of a cold-drawn high-precision cylinder barrel 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; tensioning, wherein the rolled pipe formed after continuous rolling is subjected to sizing through a tensioner; 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; tempering treatment; honing; and hot straightening treatment. The cold-drawn high-precision cylinder barrel pipe obtained through the method is precise in size and smooth in surface.
Description
Technical field
The invention belongs to steel pipe preparing technical field, specifically a kind of manufacture method of cold-drawn high accuracy cylinder barrel 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 accuracy cylinder barrel pipe is provided, the cold-drawn high accuracy cylinder barrel pipe that the method obtains, yield strength is high, tensile strength is high, precision size, smooth surface, its store oil excellent performance.
According to technical scheme provided by the invention, a kind of manufacture method of cold-drawn high accuracy cylinder barrel pipe comprises the steps:
(1), heating: 27SiMn pipe is heated to 1200 ~ 1290 DEG C in annular furnace, and the heat time is 4 ~ 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 1150 ~ 1220 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 controls annealing temperature 600 ~ 650 DEG C, annealing time is 70 ~ 80min, obtains the annealing pipe that annealing hardness (HV) is 210 ~ 216;
(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 ~ 1260 DEG C, obtains rolled pipe;
(6), tensioning: the rolled pipe formed after tandem rolling is again through tensioning device sizing, and form steel pipe, finishing temperature control during tensioning is at 500 ~ 650 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 550 ~ 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 10 ~ 50 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 800 ~ 880 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), pre-straightening process: straightening temperature 650 ~ 680 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 850 ~ 890 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 ~ 450 DEG C, to reduce residual stress;
(17), honing: select vertical honing machine, workpiece turns round, and the form processing that honing head is reciprocating, reaches cylindricity: 0.01 ~ 0.02mm, Aperture deviation: 0.01 ~ 0.02mm, roughness: the high standard precision of Ra0.25 ~ 0.35;
(18), thermal straightening process: be incubated 45 ~ 60 minutes in low-temp temper furnace, carry out thermal straightening process again, thermal straightening temperature 550 ~ 600 DEG C, obtain yield strength (MPa): 805, tensile strength (MPa): 840, outer diameter tolerance :+0.5%, wall thickness tolerance: 8%, external diameter out-of-roundness: 0.3%, eccentricity: 6%, the cold-drawn high accuracy cylinder barrel pipe of linearity: 0.30mm/m.
Beneficial effect of the present invention is as follows: the cold-drawn high accuracy cylinder barrel pipe utilizing the inventive method to produce, yield strength is high, tensile strength is high, precision size, smooth surface, its store oil excellent performance.
Detailed description of the invention:
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment one:
To prepare diameter for 155.3mm and the hole wall wall thickness 27SiMn steel pipe that is 7.63mm, comprise the following steps:
(1), heating: 27SiMn pipe is heated to 1200 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 1150 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 600 DEG C, annealing time is 0min, 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 1250 DEG C, obtains rolled pipe;
(6), tensioning: the rolled pipe formed after tandem rolling is again through tensioning device sizing, and form steel pipe, finishing temperature control during tensioning is at 500 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 550 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 10 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 that surface forms trbasic zinc phosphate 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 800 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), pre-straightening process: straightening temperature 650 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 850 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), honing: select vertical honing machine, workpiece turns round, and the form processing that honing head is reciprocating, reaches cylindricity: 0.01mm, Aperture deviation: 0.01mm, roughness: the high standard precision of Ra0.25;
(18), thermal straightening process: be incubated 45 minutes in low-temp temper furnace, carry out thermal straightening process again, thermal straightening temperature 550 DEG C, obtain yield strength (MPa): 875, tensile strength (MPa): 896, outer diameter tolerance :+0.5%, wall thickness tolerance: 8%, external diameter out-of-roundness: 0.3%, eccentricity: 6%, the cold-drawn high accuracy cylinder barrel pipe of linearity: 0.30mm/m.
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 accuracy cylinder barrel pipe and conventional steel pipe
Embodiment two:
To prepare diameter for 139.9mm and the hole wall wall thickness 27SiMn steel pipe that is 7.89mm, comprise the following steps:
(1), heating: 27SiMn pipe is heated to 1290 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 1220 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 650 DEG C, annealing time is 80min, obtains the annealing pipe that annealing hardness (HV) is 216;
(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 1260 DEG C, obtains rolled pipe;
(6), tensioning: the rolled pipe formed after tandem rolling is again through tensioning device sizing, and form steel pipe, finishing temperature control during tensioning is at 650 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 50 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 that surface forms trbasic zinc phosphate 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 880 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), pre-straightening process: straightening temperature 680 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 890 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 450 DEG C, to reduce residual stress;
(17), honing: select vertical honing machine, workpiece turns round, and the form processing that honing head is reciprocating, reaches cylindricity: 0.02mm, Aperture deviation: 0.02mm, roughness: the high standard precision of Ra0.35;
(18), thermal straightening process: be incubated 60 minutes in low-temp temper furnace, carry out thermal straightening process again, thermal straightening temperature 600 DEG C, obtain yield strength (MPa): 877, tensile strength (MPa): 886, outer diameter tolerance :+0.5%, wall thickness tolerance: 8%, external diameter out-of-roundness: 0.3%, eccentricity: 6%, the cold-drawn high accuracy cylinder barrel pipe of linearity: 0.30mm/m.
Embodiment three:
To prepare diameter for 159.4mm and the hole wall wall thickness 27SiMn steel pipe that is 7.52mm, comprise the following steps:
(1), heating: 27SiMn pipe is heated to 1280 DEG C in annular furnace, and the heat time is 4.5 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 1200 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 630 DEG C, annealing time is 75min, obtains the annealing pipe that annealing hardness (HV) is 213;
(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 1255 DEG C, obtains rolled pipe;
(6), tensioning: the rolled pipe formed after tandem rolling is again through tensioning device sizing, and form steel pipe, finishing temperature control during tensioning is at 600 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 590 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 40 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 that surface forms trbasic zinc phosphate 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 860 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), pre-straightening process: straightening temperature 670 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 880 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 440 DEG C, to reduce residual stress;
(17), honing: select vertical honing machine, workpiece turns round, and the form processing that honing head is reciprocating, reaches cylindricity: 0.015mm, Aperture deviation: 0.015mm, roughness: the high standard precision of Ra0.28;
(18), thermal straightening process: be incubated 55 minutes in low-temp temper furnace, carry out thermal straightening process again, thermal straightening temperature 580 DEG C, obtain yield strength (MPa): 877, tensile strength (MPa): 893, outer diameter tolerance :+0.5%, wall thickness tolerance: 8%, external diameter out-of-roundness: 0.3%, eccentricity: 6%, the cold-drawn high accuracy cylinder barrel pipe of linearity: 0.30mm/m.
Claims (1)
1. the manufacture method of a cold-drawn high accuracy cylinder barrel pipe comprises the steps:
(1), heating: 27SiMn pipe is heated to 1200 ~ 1290 DEG C in annular furnace, and the heat time is 4 ~ 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 1150 ~ 1220 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 600 ~ 650 DEG C, annealing time is 70 ~ 80min, obtains the annealing pipe that annealing hardness (HV) is 210 ~ 216;
(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 ~ 1260 DEG C, obtains rolled pipe;
(6), tensioning: the rolled pipe formed after tandem rolling is again through tensioning device sizing, and form steel pipe, finishing temperature control during tensioning is at 500 ~ 650 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 550 ~ 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 10 ~ 50 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 800 ~ 880 DEG C, prevents steel tube surface from occurring pockmark, carries out surface treatment;
(14), pre-straightening process: straightening temperature 650 ~ 680 DEG C, to reduce residual stress;
(15), induction furnace Quenching Treatment: induction furnace hardening heat is 850 ~ 890 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 ~ 450 DEG C, to reduce residual stress;
(17), honing: select vertical honing machine, workpiece turns round, and the form processing that honing head is reciprocating, reaches cylindricity: 0.01 ~ 0.02mm, Aperture deviation: 0.01 ~ 0.02mm, roughness: the high standard precision of Ra0.25 ~ 0.35;
(18), thermal straightening process: be incubated 45 ~ 60 minutes in low-temp temper furnace, carry out thermal straightening process again, thermal straightening temperature 550 ~ 600 DEG C, obtain yield strength (MPa): 805, tensile strength (MPa): 840, outer diameter tolerance :+0.5%, wall thickness tolerance: 8%, external diameter out-of-roundness: 0.3%, eccentricity: 6%, the cold-drawn high accuracy cylinder barrel pipe of linearity: 0.30mm/m.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216971A (en) * | 2016-08-15 | 2016-12-14 | 丁海迅 | A kind of processing technology of high intensity ratchet ring |
| CN108421842A (en) * | 2018-03-16 | 2018-08-21 | 常熟市无缝钢管有限公司 | The processing method of hexagonal alloy seamless steel pipe in outer circle |
| CN111451393A (en) * | 2020-03-20 | 2020-07-28 | 苏州辉图精密工业有限公司 | Nitrogen spring stamping process |
| CN111495984A (en) * | 2020-05-10 | 2020-08-07 | 江苏联峰实业有限公司 | Production method of reducing round bar rolled steel |
| CN114959238A (en) * | 2022-06-17 | 2022-08-30 | 无锡江南高精度冷拔管有限公司 | Heat treatment process of large-diameter thin-wall cylinder barrel |
-
2014
- 2014-08-30 CN CN201410446481.9A patent/CN105363825A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216971A (en) * | 2016-08-15 | 2016-12-14 | 丁海迅 | A kind of processing technology of high intensity ratchet ring |
| CN108421842A (en) * | 2018-03-16 | 2018-08-21 | 常熟市无缝钢管有限公司 | The processing method of hexagonal alloy seamless steel pipe in outer circle |
| CN111451393A (en) * | 2020-03-20 | 2020-07-28 | 苏州辉图精密工业有限公司 | Nitrogen spring stamping process |
| CN111495984A (en) * | 2020-05-10 | 2020-08-07 | 江苏联峰实业有限公司 | Production method of reducing round bar rolled steel |
| CN114959238A (en) * | 2022-06-17 | 2022-08-30 | 无锡江南高精度冷拔管有限公司 | Heat treatment process of large-diameter thin-wall cylinder barrel |
| CN114959238B (en) * | 2022-06-17 | 2024-02-13 | 无锡江南高精度冷拔管有限公司 | Heat treatment process of large-caliber thin-wall cylinder barrel |
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