CN103255279A - Heat treatment process of steel wire - Google Patents
Heat treatment process of steel wire Download PDFInfo
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- CN103255279A CN103255279A CN2013101871768A CN201310187176A CN103255279A CN 103255279 A CN103255279 A CN 103255279A CN 2013101871768 A CN2013101871768 A CN 2013101871768A CN 201310187176 A CN201310187176 A CN 201310187176A CN 103255279 A CN103255279 A CN 103255279A
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Abstract
The invention discloses a heat treatment process of a steel wire and provides a heat treatment method which can relieve the influences on the quality of a product by the change of an environment and can improve the stability of the product. The heat treatment process comprises processes of heating by a flat furnace, quenching by lead, washing by acid, phosphorizing, saponifying and drying; the process of heating by the flat furnace adopts a manner of heating in sections; a flat-furnace heating furnace is divided into four sections; the heating temperature of a first-section furnace is 980+/-5 DEG C, the heating temperature of a second-section furnace is 965+/-5 DEG C, the heating temperature of a third-section furnace is 945+/-5 DEG C and the heating temperature of a fourth-section furnace is 930+/-5 DEG C; and the process of quenching by the lead is carried out in a lead boiler after the heat of a material is preserved in the fourth-section furnace for a period of time. The method adopts the manner of heating in the sections and the furnace temperature of each section is reasonably controlled to relieve the influences on a tissue structure by the change of the environment and guarantee the quality and the stability of the product. Meanwhile, an austenite size and a tissue performance of the obtained product can be effectively controlled, the tensile strength of the steel wire is improved and the fatigue service life of a steel wire rope is prolonged.
Description
Technical field
The present invention relates to the heat treatment technics field, particularly relate to a kind of thermal treatment process of steel wire.
Background technology
The carbon steel wire light that drawing goes out through wire rod need heat-treat to eliminate work hardening, obtains being fit to the sheet sorbite metallographic structure of drawing processing, and guarantees that cold drawn back steel wire comprehensive mechanical property meets the expected requirements.It is that the hypoeutectoid steel wire rod is heated to A that sorbitizing is handled
C3Above temperature (850-950 ℃), the insulation back obtains austenite structure, is quickly cooled to 450-550 ℃ subsequently, and supercooled austenite generation isothermal transformation obtains the metallographic structure of sheet sorbite.
The heat treated process of light mainly comprises open hearth heating, patenting, pickling, phosphatization, saponification oven dry and take-up process.Wherein, the heat-processed of steel wire is the significant process that influences the metallographic structure of thermal treatment gained, add the resulting austenite structure of heat deflection by perlite under the room temperature, its grain size, shape, structure and homogeneity of ingredients thereof etc. all will directly influence phase transformation and the product thereof in the steel wire process of cooling.Under the certain situation of composition, the performance of ferrous materials depends primarily on tissue signature, and the grain structure of refinement can improve the strength of materials under the prerequisite that does not reduce toughness of material.The austenitization of steel wire adopts fast heating continuously, has both increased superheating temperature, shortens incubation period, has increased nucleation rate, thereby obtained tiny austenite crystal.In the steel wire austenitization, heat-up rate and higher line temperature faster, be conducive to austenitic quick forming core and increase nucleation rate, can obtain more tiny austenite crystal like this, be conducive to steel wire and obtain higher heat back intensity, and the DV value of raising heat treatment furnace, steel wire temperature rise speed faster obtains by control process furnace chamber temperature.But, present rapid heating all be direct heating to preset temperature, the very little variation of wire temperature or environment all can cause the variation of heating environment, steel wire be heated to a too high temperature and cause overheated.Overheatedly make the remarkable alligatoring of austenite crystal, form Wei Shi body tissue in the process of steel wire patenting subsequently, make intensity reduce, fragility increases, and influences quality and the stability of product.And, adopt direct heating to cause energy consumption higher to the mode of preset temperature.
Summary of the invention
The objective of the invention is to alleviate environmental change to the influence of quality product at the technological deficiency that exists in the prior art and provide a kind of, improve the heat treating method of the steel wire of product stability.
For realizing that the technical scheme that purpose of the present invention adopts is:
A kind of thermal treatment process of steel wire, comprise open hearth heating, patenting, pickling, phosphatization, saponification and drying course, it is characterized in that, described open hearth heat-processed adopts the mode of zone heating, it is four sections that the open hearth process furnace is divided into, the primary reformer Heating temperature is 980 ℃ ± 5 ℃, the secondary reformer Heating temperature is 965 ℃ ± 5 ℃, the 3rd section stove Heating temperature is 945 ℃ ± 5 ℃, the 4th section stove Heating temperature is 930 ℃ ± 5 ℃, enters lead pan at the 4th section stove after insulation for some time and carries out patented process; In the described patented process, two sections temperature of lead pan are 570 ℃; Wherein, definite mode of soaking time is: T=L/V, and wherein, V represents the steel wire payingoff speed, and T represents soaking time, and L represents the 4th section furnace length.
Working concentration is that the hydrochloric acid soln of 17-21% is in pickling below 45 ℃ in the described acid cleaning process.
The temperature of described phosphatization is 80-90 ℃.
The temperature of described oven dry is 150-170 ℃.
In the described saponification process, saponification temperature is controlled between 75-95 ℃, and the pH value is controlled between 8-9, and the concentration of saponification liquor is 2%-3%.
Compared with prior art, the invention has the beneficial effects as follows:
1, heat treating method of the present invention adopts the mode of zone heating to heat, and by the furnace temperature of reasonable each section of control, can alleviate environmental change to the influence of weave construction, ensures quality and the stability of product.Simultaneously, effectively control austenite size and the structure property of products obtained therefrom, thereby obtain sheet interlayer spacing and the less sorbite tissue of group's size after ensureing the process patenting, thereby improve the tensile strength of steel wire, the fatigue lifetime of improving wireline.
2, heat treating method of the present invention adopts the mode of zone heating to heat, and can take full advantage of the waste heat of each section, is conducive to cut down the consumption of energy.
3, two sections temperature of heat treating method lead pan of the present invention all are set in 570 ℃, and the microstructure of light is through more fine and close after the lead bath, hole still less, its mechanical property is better.
4, heat treating method application hydrochloric acid soln of the present invention carries out pickling, is fit to use at low temperatures, and energy consumption is low, and pickling speed is fast, and hydrochloric acid is cheap, can reduce production costs.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail.
The thermal treatment process of steel wire of the present invention comprises open hearth heating, patenting, pickling, phosphatization, saponification and drying course.
The open hearth heating: described open hearth heat-processed adopts the mode of zone heating.It is four sections that the open hearth process furnace is divided into, and the primary reformer Heating temperature is 980 ℃ ± 5 ℃, and the secondary reformer Heating temperature is 965 ℃ ± 5 ℃, and the 3rd section stove Heating temperature is 945 ℃ ± 5 ℃, and the 4th section stove Heating temperature is 930 ℃ ± 5 ℃.The light that drawing goes out through wire rod begins to enter the open hearth heating, earlier by primary reformer be heated to 980 ℃ carry out overheated, enter secondary reformer subsequently and cool to 965 ℃, enter 930 ℃ in 945 ℃ in three sections stoves and 4 sections stoves more successively, after insulation for some time, make its internal organizational structure change austenite into, to improve the performance of steel, significantly improve every over-all properties of light, method of the present invention can effectively be controlled austenite size and the structure property of desired product by four sections furnace temperature of reasonable adjustment.
Wherein, definite mode of soaking time is: T=L/V, and wherein, V represents the steel wire payingoff speed, and T represents soaking time, and L represents the 4th section furnace length.Steel wire with specification 65#/Ф 2.0 is example, and its DV value is 52, and wherein D represents steel wire diameter, and the 4th section furnace length L is 4.5 meters, V=52/D=26 rice/minute, T=L/V=4.5/26=10.3 second.
Patenting: in the patented process, two sections temperature of lead pan are 570 ℃.Behind the light austenitizing, enter and carry out the process that structural transformation is finished in quenching and preserving heat and cooling in the molten lead of lead pan, finally be organized as sorbite.The microstructure of light is through more fine and close after the lead bath, hole still less, its mechanical property is better.Cementite is organized gradually to the draw directional steering by random orientation in the sorbite tissue, finally is parallel to the draw direction, parallelly becomes more tiny with the sorbite lamella draw direction.Sorbite sheet interlayer spacing and group's size are more little, and the tensile strength of steel wire is more high, and the fatigue lifetime of wireline is more high.
Pickling: structural transformation is that sorbitic light enters the salt acid tank and carries out pickling, utilizes hydrochloric acid that oxide dissolution and corrosion are produced the effect that the mechanically peel effect of hydrogen reaches rust cleaning and descales.The application hydrochloric acid soln carries out pickling temperature and is no more than 45 ℃, and the concentration of hydrochloric acid soln is 17%～21%.
Phosphatization: the light after the pickling is through after the hot water wash; enter the phosphatization pond and carry out phosphatization; applied chemistry phosphatization, quick high-temp phosphorization technology carry out phosphatization; phosphatization temperature is between 80-90 ℃; form the water-fast crystal type phosphoric acid salt conversion of one deck film at surface deposition, provide protection to live wire, prevent to a certain extent being corroded; improve anti-corrosion capability, and in follow-up drawing process, work to alleviate friction and lubricated.
Saponification: the effect of saponifying process is same as phosphorization substantially, all is to play lubricated, provide protection for follow-up drawing process.Saponification temperature control is between 75-95 ℃, and pH value is controlled between 8-9, and the concentration of assurance saponification liquor makes its perfection be attached to Steel Wire Surface at 2%-3%, and saponification layer water absorbability, oilness are strong.
Oven dry: final step baking operation temperature is carried out at 150-170 ℃, and oven dry live wire surface-moisture produces corrosive nature when preventing from placing.
Parameter by the aforesaid method products obtained therefrom is as shown in table 1.
Table 1
| Specification | Tensile strength (MPa) | The DV value | The speed of a motor vehicle (m/min) |
| 47A/2.21 | 890-990 | 52 | 23.5 |
| 47A/2.81 | 880-980 | 52 | 18.5 |
| 65#/1.8 | 1100-1200 | 52 | 28.8 |
| 65#/2.0 | 1090-1190 | 52 | 26 |
| 72A/2.8 | 1150-1250 | 50 | 17.8 |
As can be seen from Table 1, adopt the mode of zone heating to heat by heat treating method of the present invention, furnace temperature by reasonable each section of control, effectively control austenite size and the structure property of products obtained therefrom, thereby ensure through obtaining sheet interlayer spacing and the less sorbite tissue of group's size after the patenting, improved the tensile strength of steel wire.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the thermal treatment process of a steel wire, comprise open hearth heating, patenting, pickling, phosphatization, saponification and drying course, it is characterized in that, described open hearth heat-processed adopts the mode of zone heating, it is four sections that the open hearth process furnace is divided into, the primary reformer Heating temperature is 980 ℃ ± 5 ℃, the secondary reformer Heating temperature is 965 ℃ ± 5 ℃, the 3rd section stove Heating temperature is 945 ℃ ± 5 ℃, the 4th section stove Heating temperature is 930 ℃ ± 5 ℃, enters lead pan at the 4th section stove after insulation for some time and carries out patented process; In the described patented process, two sections temperature of lead pan are 570 ℃; Wherein, definite mode of soaking time is: T=L/V, and wherein, V represents the steel wire payingoff speed, and T represents soaking time, and L represents the 4th section furnace length.
2. the thermal treatment process of steel wire according to claim 1 is characterized in that, working concentration is that the hydrochloric acid soln of 17-21% is in pickling below 45 ℃ in the described acid cleaning process.
3. the thermal treatment process of steel wire according to claim 1 is characterized in that, the temperature of described phosphatization is 80-90 ℃.
4. the thermal treatment process of steel wire according to claim 1 is characterized in that, the temperature of described oven dry is 150-170 ℃.
5. the thermal treatment process of steel wire according to claim 1 is characterized in that, in the described saponification process, saponification temperature is controlled between 75-95 ℃, and the pH value is controlled between 8-9, and the concentration of saponification liquor is 2%-3%.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643131A (en) * | 2013-11-20 | 2014-03-19 | 江苏天舜金属材料集团有限公司 | Steel wire for insulation and anticorrosion steel wire mesh, and application method thereof |
| CN104328269A (en) * | 2014-11-21 | 2015-02-04 | 天津冶金集团中兴盛达钢业有限公司 | Online thermal treatment, acid pickling and phosphating process of medium and high-carbon superfine steel wire for rope making |
| CN104372354A (en) * | 2014-11-21 | 2015-02-25 | 天津冶金集团中兴盛达钢业有限公司 | Online heat treatment acid pickling and phosphating technology for medium and high-carbon thin steel wire used for ropes |
| CN104525614A (en) * | 2014-11-11 | 2015-04-22 | 东莞市科力钢铁线材有限公司 | Production process of alloy steel material for high-strength internal hexagonal wrench |
| CN106435153A (en) * | 2016-08-16 | 2017-02-22 | 江苏凯威新材料科技有限公司 | Galvanizing technology for ultra-high-strength galvanized steel wire |
| CN108034802A (en) * | 2018-01-11 | 2018-05-15 | 江苏神猴钢绳开发有限公司 | The heat treatment method and its production equipment of a kind of steel wire |
| CN108103304A (en) * | 2018-01-23 | 2018-06-01 | 北京建通鸿翔科技有限公司 | A kind of steel wire austempering heat treatment process and equipment |
| CN108607885A (en) * | 2017-08-22 | 2018-10-02 | 武汉钢铁有限公司 | Continuous processing technique before a kind of wire drawing of big specification bridge Suo Gang gren rods |
| CN108611468A (en) * | 2018-06-29 | 2018-10-02 | 柳州市横阳机械有限公司 | A kind of heat treatment method of steel wire |
| CN108866315A (en) * | 2018-06-29 | 2018-11-23 | 柳州市横阳机械有限公司 | A kind of water-bath quenching heat treatment method of steel wire |
| CN110656233A (en) * | 2019-10-16 | 2020-01-07 | 安庆锦泰金属材料科技有限公司 | Steel wire heat treatment quenching process |
| CN110724795A (en) * | 2019-09-30 | 2020-01-24 | 江苏冠晟超导科技有限公司 | Isothermal quenching heat treatment process of steel wire for wire |
| CN113416834A (en) * | 2021-01-26 | 2021-09-21 | 陈冬英 | Steel wire heat treatment quenching process |
| CN115011784A (en) * | 2022-07-29 | 2022-09-06 | 安阳双兴线材制品有限公司 | Novel heat treatment process |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643131A (en) * | 2013-11-20 | 2014-03-19 | 江苏天舜金属材料集团有限公司 | Steel wire for insulation and anticorrosion steel wire mesh, and application method thereof |
| CN103643131B (en) * | 2013-11-20 | 2015-09-09 | 江苏天舜金属材料集团有限公司 | A kind of insulating corrosion woven wire steel wire and application method thereof |
| CN104525614A (en) * | 2014-11-11 | 2015-04-22 | 东莞市科力钢铁线材有限公司 | Production process of alloy steel material for high-strength internal hexagonal wrench |
| CN104328269A (en) * | 2014-11-21 | 2015-02-04 | 天津冶金集团中兴盛达钢业有限公司 | Online thermal treatment, acid pickling and phosphating process of medium and high-carbon superfine steel wire for rope making |
| CN104372354A (en) * | 2014-11-21 | 2015-02-25 | 天津冶金集团中兴盛达钢业有限公司 | Online heat treatment acid pickling and phosphating technology for medium and high-carbon thin steel wire used for ropes |
| CN106435153A (en) * | 2016-08-16 | 2017-02-22 | 江苏凯威新材料科技有限公司 | Galvanizing technology for ultra-high-strength galvanized steel wire |
| CN108607885A (en) * | 2017-08-22 | 2018-10-02 | 武汉钢铁有限公司 | Continuous processing technique before a kind of wire drawing of big specification bridge Suo Gang gren rods |
| CN108034802A (en) * | 2018-01-11 | 2018-05-15 | 江苏神猴钢绳开发有限公司 | The heat treatment method and its production equipment of a kind of steel wire |
| CN108103304A (en) * | 2018-01-23 | 2018-06-01 | 北京建通鸿翔科技有限公司 | A kind of steel wire austempering heat treatment process and equipment |
| CN108611468A (en) * | 2018-06-29 | 2018-10-02 | 柳州市横阳机械有限公司 | A kind of heat treatment method of steel wire |
| CN108866315A (en) * | 2018-06-29 | 2018-11-23 | 柳州市横阳机械有限公司 | A kind of water-bath quenching heat treatment method of steel wire |
| CN110724795A (en) * | 2019-09-30 | 2020-01-24 | 江苏冠晟超导科技有限公司 | Isothermal quenching heat treatment process of steel wire for wire |
| CN110656233A (en) * | 2019-10-16 | 2020-01-07 | 安庆锦泰金属材料科技有限公司 | Steel wire heat treatment quenching process |
| CN113416834A (en) * | 2021-01-26 | 2021-09-21 | 陈冬英 | Steel wire heat treatment quenching process |
| CN115011784A (en) * | 2022-07-29 | 2022-09-06 | 安阳双兴线材制品有限公司 | Novel heat treatment process |
| CN115011784B (en) * | 2022-07-29 | 2024-02-27 | 安阳双兴线材制品有限公司 | Heat treatment process |
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Application publication date: 20130821 |