CN106011447A - Method for shortening natural aging of 82B wire rod - Google Patents
Method for shortening natural aging of 82B wire rod Download PDFInfo
- Publication number
- CN106011447A CN106011447A CN201610622808.2A CN201610622808A CN106011447A CN 106011447 A CN106011447 A CN 106011447A CN 201610622808 A CN201610622808 A CN 201610622808A CN 106011447 A CN106011447 A CN 106011447A
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- Prior art keywords
- temperature
- wire rod
- groove
- pickling
- seconds
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/12—Orthophosphates containing zinc cations
- C23C22/13—Orthophosphates containing zinc cations containing also nitrate or nitrite anions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
Abstract
The invention discloses a method for shortening the natural aging of a 82B wire rod. The method comprises the following steps: pickling a wire rod with gradient-concentration hydrochloric acid, wherein the pickling temperature reaches 30-50 DEG C, and the pickling time is 500-650 seconds; flushing with high-pressure water, and performing surface conditioning treatment; performing medium-temperature phosphorization in a phosphorization tank at 60-75 DEG C, wherein the phosphorization time is 200-260 seconds; putting the product in a high-temperature hot water tank at a temperature of over 85 DEG C, and staying for 70 seconds; and standing for 1-2 days for natural aging. The escape of hydrogen and the disappearance of residual stress can be accelerated, which is equivalent to artificial aging of the wire rod. In the invention, the aging period of the wire rod is greatly shortened, the mechanical properties of the wire rod are good, the problem in production turnover is solved, and the steel wire drawing quality is improved.
Description
Technical field
The present invention relates to 82B wire rod natrual ageing problem, shorten the wire rod natrual ageing phase, solve production turnover problem, reduce occupation of capital amount, improve drawing quality.
Background technology
Diameter Ф 12.5mm, grade of steel 82B wire rod roll off the production line from raw material manufacturer production and are transported to production scene, typically have 25 days, use wire rod the most immediately, and wire rod breaking is serious, and finished product wire broken rate is high.Typically requiring that the natrual ageing phase at room temperature put by 82B wire rod is 15 days summers, 30 days winters.This natrual ageing phase produces turnover to downstream and makes troubles, and warehousing pressure is big, and the product circulation cycle is long, greatly occupies production capital.Can there is protium in residual stress, and steel and escape the most in time and spread in the 82B wire rod just rolled, the contraction percentage of area is low, and plasticity is poor, and drawing immediately arises that fracture of wire phenomenon.Natrual ageing a period of time at room temperature need to be put.The aging phenomenon of high-carbon steel wire rod is mainly caused by escaping of hydrogen, and hydrogen dissolubility in austenite is higher, but dissolubility is the lowest in pearlite.The microstructure of 82B wire rod is mainly pearlite, and when austenite is changed into pearlite, the hydrogen in wire rod is in hypersaturated state, requires time for release.After a period of time placed by wire rod, internal hydrogen is gradually escaped, and plasticity improves.
Summary of the invention
The invention aims to overcome the deficiencies in the prior art, it is provided that a kind of method shortening 82B wire rod natrual ageing, solve the 82B long technical problem of wire rod natural ageing cycle, improve production efficiency.
The technical scheme is that wire rod through the chlorohydric acid pickling of ladder concentration, high pressure water washing, table mediates reason, again after middle temperature phosphating, it is positioned over certain time in high-temperature hot tank, places the most again 12 days, the wire rod timeliness phase can be greatly shortened, wire rod mechanical property is good, meets product drawing requirement.
Its principle is: wire rod, when chlorohydric acid pickling, is exothermic process, and pickle temperature can reach 30 50 DEG C, and wire rod has 500 650 seconds at a temperature of being positioned over this altogether, and wire rod is when bonderizing, and phosphatization temperature is 60 75 DEG C, and standing time is 200 260 seconds；Through high-temperature hot tank, temperature >=85 DEG C, standing time is 70 seconds；Along with process time temperature be incremented by, accelerate escaping and the disappearance of residual stress of protium, be equivalent to carry out artificial aging.In the process, quickening of escaping because of the rising of wire temperature, the residual stress in wire rod can be gradually reduced protium in prolongation in time, and this kind of process is accelerated with the rising of temperature.Last wire rod is being placed 12 days at room temperature, carries out natrual ageing so that escape and the residual stress of protium disappear completely.By stretching fracture morphology analysis, fragility white circle area now reduces, and almost disappears, and the pars fibrosa of black increases, and shear lip is elongated, shows that wire rod plasticity increases, and wire rod natrual ageing after 15 days plasticity be more or less the same, product drawing requirement can be met.
A kind of method shortening the 82B wire rod natrual ageing phase of the present invention, specifically includes and implements step as follows:
(1) putting into 82B wire rod to have in the hydrochloric acid trough of ladder concentration and carry out pickling, wire rod sequentially passes through 5 hydrochloric acid troughs and carries out chlorohydric acid pickling, and removes iron scale；
When ambient temperature 20 DEG C, 1# groove: HCL concentration is 80 140g/L, ferrous ion concentration≤250g/L, temperature 25-30 DEG C；
2# groove: HCL concentration is 120 180g/L, ferrous ion concentration≤200g/L, temperature 30-35 DEG C；
3# groove: HCL concentration is 180 240g/L, ferrous ion concentration≤110g/L, temperature 35-40 DEG C；
4# groove: HCL concentration is 220 280g/L, ferrous ion concentration≤60g/L, temperature 40-50 DEG C；
5# groove: HCL concentration is 50 200g/L, ferrous ion concentration≤100g/L, temperature 25-30 DEG C；
Pickling time is 100 130 seconds/groove, is mounted on circulating pump in each hydrochloric acid trough, makes liquid uniform, along with being gradually incremented by of temperature when processing, accelerates escaping and the disappearance of residual stress of protium；
(2) being positioned in Phosphating Solution by the wire rod after pickling and carry out middle temperature phosphating, Phosphating Solution parameter is: total acidity 40-50 point, free acidity 58 point, ZnO:15 26g/L, NO3-: 15 30g/L, PO4 3-
: 12 23g/L, phosphatization temperature 60 75 DEG C, phosphating time 200 260 seconds, it is achieved the generation of phosphating coat, also because the raising of temperature accelerates escaping of protium；
(3) being positioned in high-temperature hot tank by the wire rod after phosphatization, hot water storgae temperature >=85 DEG C, standing time is 70 seconds；
(4) last placement by wire rod 12 days again carries out natrual ageing so that protium is sufficiently escaped, and residual stress is wholly absent.
The invention has the beneficial effects as follows: i.e. meet the pre-treatment of steel wire drawing, also shorten the wire rod timeliness phase, solve production turnover problem, improve drawing quality, reduce occupation of capital amount.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail:
As a example by producing diameter Ф 12.5mm, grade of steel 82B steel wire rod:
The method of the shortening 82B wire rod natrual ageing phase of the present invention, including implementing step as follows:
(1) putting into 82B wire rod to have in the hydrochloric acid trough of ladder concentration and carry out pickling, wire rod sequentially passes through 5 hydrochloric acid troughs and carries out chlorohydric acid pickling, and removes iron scale, and wire rod is sequentially placed into high pressure water flushing washing trough, Rinsing Area the most again, and table is adjusted in groove and processed；
When ambient temperature 20 DEG C, 1# groove: HCL concentration is 80 140g/L, ferrous ion concentration≤250g/L, temperature 25-30 DEG C；
2# groove: HCL concentration is 120 180g/L, ferrous ion concentration≤200g/L, temperature 30-35 DEG C；
3# groove: HCL concentration is 180 240g/L, ferrous ion concentration≤110g/L, temperature 35-40 DEG C；
4# groove: HCL concentration is 220 280g/L, ferrous ion concentration≤60g/L, temperature 40-50 DEG C；
5# groove: HCL concentration is 50 200g/L, ferrous ion concentration≤100g/L, temperature 25-30 DEG C；
Pickling time is 100 130 seconds/groove, is mounted on circulating pump in each hydrochloric acid trough, makes liquid uniform, along with being gradually incremented by of temperature when processing, accelerates escaping and the disappearance of residual stress of protium；
(2) being positioned in Phosphating Solution by the wire rod after pickling and carry out middle temperature phosphating, Phosphating Solution parameter is: total acidity 40-50 point, free acidity 58 point, ZnO:15 26g/L, NO3-: 15 30g/L, PO4 3-
: 12 23g/L, acid ratio 58, phosphatization temperature 60 75 DEG C, accelerator 26 point, phosphating time 200 260 seconds, it is achieved the generation of phosphating coat, also because the raising of temperature accelerates escaping of protium；
(3) being positioned in high-temperature hot tank by the wire rod after phosphatization, hot water storgae temperature >=85 DEG C, pH value 68 standing time is 70 seconds；
(4) last placement by wire rod 12 days again carries out natrual ageing so that protium is sufficiently escaped, and residual stress is wholly absent.
Claims (1)
1. the method shortening the 82B wire rod natrual ageing phase, is characterized in that including implementing as follows step:
(1) putting into 82B wire rod to have in the hydrochloric acid trough of ladder concentration and carry out pickling, wire rod sequentially passes through 5 hydrochloric acid troughs and carries out chlorohydric acid pickling, and removes iron scale, and wire rod is sequentially placed into high pressure water flushing washing trough, Rinsing Area the most again, and table is adjusted in groove and processed；
When ambient temperature 20 DEG C, 1# groove: HCL concentration is 80 140g/L, ferrous ion concentration≤250g/L, temperature 25-30 DEG C；
2# groove: HCL concentration is 120 180g/L, ferrous ion concentration≤200g/L, temperature 30-35 DEG C；
3# groove: HCL concentration is 180 240g/L, ferrous ion concentration≤110g/L, temperature 35-40 DEG C；
4# groove: HCL concentration is 220 280g/L, ferrous ion concentration≤60g/L, temperature 40-50 DEG C；
5# groove: HCL concentration is 50 200g/L, ferrous ion concentration≤100g/L, temperature 25-30 DEG C；
Pickling time is 100 130 seconds/groove, is mounted on circulating pump in each hydrochloric acid trough, makes liquid uniform, along with being gradually incremented by of temperature when processing, accelerates escaping and the disappearance of residual stress of protium；
(2) being positioned in Phosphating Solution by the wire rod after pickling and carry out middle temperature phosphating, Phosphating Solution parameter is: total acidity 40-50 point, free acidity 58 point, ZnO:15 26g/L, NO3-: 15 30g/L, PO4 3-
: 12 23g/L, acid ratio 58, phosphatization temperature 60 75 DEG C, accelerator 26 point, phosphating time 200 260 seconds, it is achieved the generation of phosphating coat, also because the raising of temperature accelerates escaping of protium；
(3) being positioned in high-temperature hot tank by the wire rod after phosphatization, hot water storgae temperature >=85 DEG C, pH value 68 standing time is 70 seconds；
(4) last placement by wire rod 12 days again carries out natrual ageing so that protium is sufficiently escaped, and residual stress is wholly absent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610622808.2A CN106011447A (en) | 2016-08-02 | 2016-08-02 | Method for shortening natural aging of 82B wire rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610622808.2A CN106011447A (en) | 2016-08-02 | 2016-08-02 | Method for shortening natural aging of 82B wire rod |
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| CN106011447A true CN106011447A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610622808.2A Pending CN106011447A (en) | 2016-08-02 | 2016-08-02 | Method for shortening natural aging of 82B wire rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130542A (en) * | 2017-12-18 | 2018-06-08 | 贵州钢绳股份有限公司 | A kind of tunnel type chlorohydric acid pickling production technology |
| CN108149233A (en) * | 2017-12-18 | 2018-06-12 | 贵州钢绳股份有限公司 | A kind of carbon steel wire rod with high phosphating process at medium temperature |
| CN108166013A (en) * | 2017-12-18 | 2018-06-15 | 贵州钢绳股份有限公司 | A kind of wire rod exempts from soap lye cleaning process of surface treatment |
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| CN101392313A (en) * | 2008-11-04 | 2009-03-25 | 首钢总公司 | Method for shortening high carbon steel aging time through online thermal insulation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130542A (en) * | 2017-12-18 | 2018-06-08 | 贵州钢绳股份有限公司 | A kind of tunnel type chlorohydric acid pickling production technology |
| CN108149233A (en) * | 2017-12-18 | 2018-06-12 | 贵州钢绳股份有限公司 | A kind of carbon steel wire rod with high phosphating process at medium temperature |
| CN108166013A (en) * | 2017-12-18 | 2018-06-15 | 贵州钢绳股份有限公司 | A kind of wire rod exempts from soap lye cleaning process of surface treatment |
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