CN207775311U - A kind of heat treating facilities of steel wire - Google Patents

Abstract

The utility model discloses a kind of heat treating facilities of steel wire, including heat-treatment furnace, the quenching unit set gradually, wherein steel wire is admitted in heat-treatment furnace and is heated, and heat-treatment furnace includes heating burner；Steel wire after heating is admitted to progress temperature control cooling in quenching unit, and quenching unit uses sectional temperature-controlled system；Each section of hardening heat is in different interval ranges, and the high level of latter section of hardening heat range is not higher than the low value of the last period control temperature range.The quenching unit of the utility model uses sectional temperature-controlled mode, and the Soxhlet body tissue that the piece interlamellar spacing effectively obtained after control quenching is smaller, group's size is tiny improves tensile strength and the fatigue life of steel wire to ensure the stability of its microscopic structure.

Description

A kind of heat treating facilities of steel wire

Technical field

The utility model is related to a kind of heat treating facilities of steel wire.

Background technology

Steel wire is heat-treated by being heated to A_C3Above temperature, warm a period of time, subsequently enter in thermostatic medium into Row cooling, to obtain sorbitizing tissue, it is ensured that finished product steel wire obtains final excellent mechanical performance, is essentially all to adopt at present With preheating temperature is directly heated, which energy consumption is higher, and the variation of wire temperature or environment very little can all cause steel wire to add The variation of thermal environment, once overheat will be so that austenite grain be significantly roughened, formation Wei Shi body tissues, make in subsequent quenching Intensity of steel wire reduces, brittleness increases, and influences product quality and stability；In addition, in quenching process, accurate temperature controlling is needed, one Denier temperature is relatively low or higher, and the microscopic structure of steel wire can be made to change, and then influences its mechanical property.

In addition, carry out phosphorating treatment after steel wire pickling, steel wire surface is made to generate one layer of phosphate layer, convenient for steel wire drawing and So that steel wire is had certain corrosion protection ability, but be also required to carry out water flushing after phosphatization, by the clear Xian Gan of the extra phosphating solution of steel wire surface Only, it is convenient for saponification process, contains the elements such as phosphorus, zinc, nitrogen in this ejected wash water, needs to discharge after carrying out sewage disposal, handle It is of high cost.

Utility model content

In order to solve the above-mentioned technical problem, the utility model provides a kind of heat treating facilities of steel wire, Neng Goubao The stability for demonstrate,proving steel wire microscopic structure, improves the performance of steel wire.

In order to achieve the above object, the technical solution of the utility model is as follows：

The utility model provides a kind of heat treating facilities of steel wire, including set gradually heat-treatment furnace, quenching Device, wherein steel wire is admitted in heat-treatment furnace and is heated, and heat-treatment furnace includes heating burner；Steel wire after heating is sent Enter progress temperature control cooling in quenching unit, quenching unit uses sectional temperature-controlled system；Each section of hardening heat is in different sections In range, and the high level of latter section of hardening heat range is not higher than the low value of the last period control temperature range.

Preferably, quenching unit includes three sections of temperature control areas.

Preferably, it is equipped with forced air cooled tube in the first segment temperature control area of quenching unit bottom, to be dropped when the temperature is excessively high Temperature, second and third section temperature control area be respectively equipped with water cooled pipeline, carry out circulating cooling.

Preferably, 580-590 DEG C of first segment hardening heat, 570-580 DEG C of second segment hardening heat, third section hardening heat 560℃±5℃。

Preferably, heat-treatment furnace also uses heat stepwise, wherein heat stepwise includes four sections, first segment heating temperature 980-990 DEG C, 960-970 DEG C of second segment heating temperature, 950-960 DEG C of third section heating temperature, the 4th section of heating temperature 940 DEG C, it is 2-4min in the soaking time of the 4th section of warm area.

Preferably, the heating burner in heat-treatment furnace is depressured fuel design using exhausting, and is measured in stove using power regulating eqiupment Temperature.

Preferably, further include the water-cooling apparatus set gradually, pickling tube, water flushing device, phosphating pond, a secondary water Flusher, saponification process device；

Water-cooling apparatus cools down quenched steel wire, and steel wire after cooling is sent into pickling tube and carries out pickling, pickling Steel wire afterwards is rinsed using a water flushing device, is sent into phosphating pond later and is carried out phosphatization, the steel wire after phosphatization utilizes two Secondary water flushing device carries out second of water flushing, and the steel wire by phosphatization is sent into saponification process device, carries out saponification process.

Preferably, further include reuse water device, the waste water of secondary water flushing device discharge is passed straight back to without processing In phosphating pond, recycled.

Preferably, without detecting the constituent content contained in water in reuse water device, using the pressure difference of water level, water is set Position height, by automatic pressure, makes water flow back into phosphating pond.

Preferably, further include drying unit；Further, further include take-up.

Compared with prior art, the utility model at least has following advantageous effect：

(1) heat-treatment furnace of the utility model can be mitigated using heat stepwise mode by accurately controlling temperature of each section Influence of the environmental change to steel wire tissue performance, ensures the mechanical mechanics property of product；And segmentation takes full advantage of each section remaining Heat advantageously reduces energy consumption, and after heating, steel wire obtains substantially uniformity, consistent austenite structure, meets technique very well and wants It asks.

(2) quenching unit of the utility model makes the austenite grain in steel wire change using segmentation accurate temperature controlling mode For sorbite, the uniform Soxhlet body tissue that piece interlamellar spacing is smaller, group's size is tiny is obtained, ensures the steady of its microscopic structure It is qualitative, improve tensile strength and the fatigue life of steel wire.

(3) quenched water cooling step, using the difference (preferably 220-240 DEG C) of hardening heat and water cooling temperature, So that the iron scale of 40% or more steel wire surface is automatically stripped, can save acid loss 35%, to reduce spent acid processing at This, reaches energy-saving and environment-friendly effect.

(4) waste water that second of water after steel wire surface phosphatization rinses is heat-treated to enter in reuse water device, it can be without Processing is passed straight back in phosphating pond, is recycled, and is reduced wastewater discharge, is reduced water consumption, reduce simultaneously The cost of wastewater treatment, achievees the effect that energy-saving and environment friendly.

(5) the heating burner in heat-treatment furnace is depressured fuel design using exhausting, has compression ignition burning different from conventional, makes whole A combustion heating system the operation is stable.

(6) when carrying out stage-hardening in quenching unit, to prevent temperature excessively high, in quenching unit bottom first stage temperature control Area be equipped with forced air cooled tube, can cool down automatically when the temperature is excessively high, second and third section temperature control area be equipped with water cooled pipeline, recycle cold But.

(7) reuse water device of the utility model is without detecting the constituent content contained in water, because of the steel wire after phosphatization Water is needed to clean, the substance contained in water meets the content of material needed for phosphating solution, and using the pressure difference of water level, sets water level Highly, by automatic watering, water is flowed back into phosphating pond, alleviates hand labor intensity, improves production efficiency, is suitable for Automatic industrial manufacturing line.

Description of the drawings

Fig. 1 is the heat treating facilities schematic diagram of steel wire in specific embodiment of the present invention.

Wherein, 1. heat-treatment furnace, 2. quenching units, 3. cooling devices, 4. pickling tubes, 5. first time water flushing devices, 6. Phosphating pond, 7. second of water flushing device, 8. reuse water devices, 9. saponification process devices, 10. drying units, 11. take-ups dress It sets.

Specific implementation mode

The preferred embodiment that according to the present invention will be described in detail below with reference to the accompanying drawings.

In order to reach the purpose of this utility model, the utility model provides a kind of heat-treating methods of steel wire, specifically Include the following steps：

(1) heat：By steel wire heating (being preferably sent to heat in heat-treatment furnace)；Preferably, described to be heated to be Heat stepwise；It is highly preferred that each section of heating temperature be in different interval ranges, and latter section of temperature range high level is not higher than The last period temperature range low value；It is further preferred that the heat stepwise includes four sections, 980-990 DEG C of first segment heating temperature, 960-970 DEG C of second segment heating temperature, 950-960 DEG C of third section heating temperature, the 4th section of 940 DEG C of heating temperature, at the 4th section The soaking time of warm area is 2-4min (i.e. the 4th section of heating temperature is 940 DEG C -940 DEG C, duration 2-4min)；

Wherein, steel wire enters heat-treatment furnace execution first segment heating from room temperature, and wire temperature is stepped up, and mainly eliminates steel Silk internal stress, crystal grain recrystallize；When executing second segment heating, austenite grain is formed and is grown up, and is obtained preliminary uniform The austenite structure of change；When executing the heating of third section, austenite grain is further homogenized；4th section is soaking zone, is led to Soaking zone heating is crossed, obtains substantially uniformity, consistent austenite structure, and by the adjusting of this section of furnace temperature, can control and come out of the stove Line temperature reaches technological requirement.

(2) it quenches：Steel wire after heating is sent into quenching unit and carries out temperature control cooling, quenching unit is using sectional temperature-controlled System, latter section of temperature high level are not higher than the last period temperature low value；Preferably, quenching unit use three sections of temperature control systems, first Duan Wendu 580-590 DEG C, 570-580 DEG C of second segment temperature, 560 ± 5 DEG C of third section hardening heat.

Wherein, steel wire reduces wire temperature, austenite structure is made to start to be changed into sorbite group by first segment temperature control It knits；Second segment temperature control, further decreases wire temperature, and austenite grain is made to be changed into sorbite；Third section temperature control is steady hot arc, Obtain uniform Soxhlet body tissue.

Preferably, further include：

(3) cooling：It is cooled down after quenching；Preferably, water-cooling apparatus is sent into be cooled down；It is highly preferred that water cooling Temperature is 60-80 DEG C, using the difference of hardening heat and water cooling temperature, keeps the iron scale of 40% or more steel wire surface automatic Stripping；

Especially, inventor has found, the temperature that patenting exports steel wire is 500-510 DEG C, by 5 meters of room temperature cooling sections Afterwards, wire temperature reaches 300 DEG C or so, and 220-240 DEG C of the temperature difference of steel wire and water cooling, the temperature difference is very beneficial for aoxidizing The stripping of iron sheet.

(4) pickling：Steel wire after cooling carries out pickling (be preferably sent to pickling tube and carry out pickling), further removes steel wire table The iron scale in face carries out phosphate coat convenient for steel wire；

(5) first time water rinses：Steel wire after pickling is rinsed with water, and removes the acidic liquid of steel wire surface；

(6) phosphatization：Steel wire after water rinses carries out phosphatization (be preferably sent to phosphating pond and carry out phosphatization), and steel wire surface is made to generate One layer of phosphate layer；

(7) second of water rinse：Steel wire after phosphatization carries out second of water flushing, and the extra phosphating solution of steel wire surface is clear Xian is clean, is convenient for saponification process；

(8) saponification：Steel wire by phosphatization is sent into saponification process device, carries out saponification process；Preferably, saponification temperature 75-85 DEG C, pH value is controlled in 8-9.

Inventor it has been investigated that, temperature be less than 75 DEG C, soap lye cannot decompose completely, not have lubricant effect；Temperature is high In 85 DEG C, soap lye easily gasifies and product is burnt；The control of saponification pH value is to be less than 8 in alkalescent, such as pH value due to soap lye itself in 8-9, Soap lye is in neutrality, and concentration is low, does not have the effect of firm phosphating coat；But pH value is more than 9, and soap lye has corrosiveness to steel wire, damage Hinder steel wire surface, steel wire surface quality is made to deteriorate.

Preferably, further include：

(9) it dries：Steel wire surface by saponification is moist, needs to dry on steel wire.

Preferably, further include：

(10) take-up：After steel wire is dried, take-up and storage.

Preferably, in step (7), the waste water after secondary water is rinsed enters in reuse water device, can be straight without processing It takes back and flows in the phosphating pond of step (6), recycled.

Preferably, by calculating the water that phosphating pond adds per hour and the water discharge capacity that second of water rinses, water is controlled Discharge capacity is less than the water of addition.

The quenching unit 2 uses three sections of temperature control systems, first segment temperature using sectional temperature-controlled mode, especially quenching unit 580-590 DEG C of degree, 570-580 DEG C of second segment temperature, 560 DEG C ± 5 DEG C of third section hardening heat obtain after can effectively controlling quenching The Soxhlet body tissue that the piece interlamellar spacing that arrives is smaller, group's size is tiny improves steel wire to ensure the stability of its microscopic structure Tensile strength and fatigue life.

As shown in Figure 1, the utility model additionally provides a kind of heat treating facilities of steel wire, it is suitable for the above method, Including heat-treatment furnace 1, the quenching unit 2 set gradually, wherein quenching unit uses sectional temperature-controlled system.

Preferably, further include the cooling device 3 set gradually, pickling tube 4, first time water flushing device 5, phosphating pond 6, Secondary water flushing device 7, saponification process device 9.

Heat-treatment furnace 1 is used for steel wire heating.Preferably, heat-treatment furnace uses heat stepwise mode, and steel wire segmentation is added Heat keeps the microscopic structure of steel wire uniform to required temperature；By accurately controlling temperature of each section, environmental change can be mitigated to steel wire The influence of structure property ensures the mechanical mechanics property of product；And segmentation takes full advantage of each section of waste heat, advantageously reduces energy Consumption.

In order to ensure the realization of accurate heat stepwise in heat-treatment furnace, it is preferable that the burner combustion in heat-treatment furnace 1 adds Thermal design is using exhausting decompression burning, rather than routine has compression ignition burning, makes entire combustion heating system the operation is stable.Meanwhile Power regulating eqiupment is provided in heat-treatment furnace.Temperature in stove is measured using power regulating eqiupment, temperature control precision, control point temperature can be improved ± 1 DEG C of difference.

Steel wire after quenching unit 2 is used to heat is sent into progress temperature control cooling in quenching unit, and quenching unit, which uses, to be divided Section temperature control system effectively controls the Soxhlet body tissue that the piece interlamellar spacing obtained after quenching is smaller, group's size is tiny, to ensure it The stability of microscopic structure improves tensile strength and the fatigue life of steel wire.

When stage-hardening, since steel wire brings heat in lead pan into, for stage-hardening is better achieved, prevents temperature mistake It is high, it is preferable that be equipped with forced air cooled tube in lead pan bottom first stage temperature control area, can automatically cool down when the temperature is excessively high；Second and Three sections of temperature control areas are equipped with water cooled pipeline, carry out circulating cooling.Meanwhile the temperature in lead pan is measured using power regulating eqiupment, improve temperature Control accuracy, the control point temperature difference ± 1 DEG C.

Cooling device 3 is for cooling down quenched steel wire.Preferably, the difference of hardening heat and cooling temperature is utilized Value, makes the iron scale of 40% or more steel wire surface automatically strip, and can save the loss 35% of acid, to reduce spent acid processing Cost reaches energy-saving and environment-friendly effect.Preferably, cooling device 3 uses water-cooling apparatus.

Preferably, using 220-240 DEG C of the temperature difference of steel wire and water cooling, to realize the iron oxide for making steel wire surface densification Skin is loose to automatically strip.

Pickling tube 4 is used to carry out pickling to steel wire after cooling, further removes the iron scale of steel wire surface, is convenient for steel Silk carries out phosphate coat.

First time water flushing device 5 washes off the Acidic Liquid of steel wire surface for the steel wire after pickling to be rinsed with water Body is prepared for phosphorating treatment.

Steel wire after phosphating pond 6 is used to rinse in water carries out phosphatization, and steel wire surface is made to generate one layer of phosphate layer, is convenient for steel Silk and makes steel wire have certain corrosion protection ability at drawing.

Second of water flushing device 7 carries out second of water flushing to the steel wire after phosphatization, by the extra phosphatization of steel wire surface Clear Xian of liquid is clean, is convenient for saponification process.

Saponification process device 9 is used to the steel wire Jing Guo phosphatization carrying out saponification process, stablizes the phosphate layer of steel wire surface, Convenient for the drawing of steel wire.

Preferably, further include reuse water device 8.Containing elements such as phosphorus, zinc, nitrogen in waste water after flushing, need to carry out dirty It could be discharged after water process, processing cost is high, and the reuse water device 8 of the utility model is needed constantly using parkerizing process The characteristics of increase water, waste water is close to phosphatization liquid hold-up after flushing, utilize the circulator in reuse water device 8, heat- treated steel The waste water that second of water rinses after silk alramenting enters in reuse water device 8, can be passed straight back to phosphatization without processing It in pond 6, is recycled, reduces wastewater discharge, reduce water consumption, while reducing the cost of wastewater treatment, reach To killing three birds with one stone, the effect of energy-saving and environment friendly.

Wherein, the reuse water device 8 of the utility model is without detecting the constituent content contained in water, because of the steel after phosphatization Silk needs water to clean, and the substance contained in water meets the content of material needed for phosphating solution；Also, the recycle-water of the utility model fills The pressure difference using water level is set, height of water level is set, water is returned by automatic pressure preferably by floating ball principle automatic watering It flows in phosphating pond, alleviates hand labor intensity, improve production efficiency, be suitable for automatic industrial manufacturing line.

Preferably, further include drying unit 10.Steel wire surface by saponification is moist, is unfavorable for take-up and storage, so It needs to dry on steel wire.

Preferably, further include take-up 11, by after drying winding steel wire and storage, to facilitate follow-up use.

Above-described is only preferred embodiments of the present invention, it is noted that for the ordinary skill of this field For personnel, any modification, equivalent replacement, improvement and so on without departing from the concept of the present invention, It should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of heat treating facilities of steel wire, it is characterised in that：Including heat-treatment furnace, the quenching unit set gradually, In, steel wire is admitted in heat-treatment furnace and is heated, and heat-treatment furnace includes heating burner；Steel wire after heating is admitted to quenching dress Middle progress temperature control cooling is set, quenching unit uses sectional temperature-controlled system；Each section of hardening heat in different interval ranges, and The high level of latter section of hardening heat range is not higher than the low value of the last period control temperature range.

2. production equipment according to claim 1, it is characterised in that：Quenching unit includes three sections of temperature control areas.

3. production equipment according to claim 2, it is characterised in that：First segment temperature control area in quenching unit bottom is equipped with Forced air cooled tube, to cool down when the temperature is excessively high, second and third section temperature control area be respectively equipped with water cooled pipeline, recycle cold But.

4. production equipment according to claim 2 or 3, it is characterised in that：580-590 DEG C of first segment hardening heat, second 570-580 DEG C of hardening heat of section, 560 DEG C ± 5 DEG C of third section hardening heat.

5. according to claim 1-3 any one of them production equipments, it is characterised in that：Heat-treatment furnace also uses heat stepwise, Wherein, heat stepwise includes four sections, 980-990 DEG C of first segment heating temperature, 960-970 DEG C of second segment heating temperature, third section 950-960 DEG C of heating temperature, the 4th section of 940 DEG C of heating temperature are 2-4min in the soaking time of the 4th section of warm area.

6. production equipment according to claim 5, it is characterised in that：Heating burner in heat-treatment furnace is depressured using exhausting Fuel design, and in-furnace temperature is measured using power regulating eqiupment.

7. production equipment according to claim 1, it is characterised in that：Further include the water-cooling apparatus set gradually, pickling Pond, a water flushing device, phosphating pond, secondary water flushing device, saponification process device；

Water-cooling apparatus cools down quenched steel wire, and steel wire after cooling is sent into pickling tube and carries out pickling, after pickling Steel wire is rinsed using a water flushing device, is sent into phosphating pond later and is carried out phosphatization, the steel wire after phosphatization utilizes secondary water Flusher carries out second of water flushing, and the steel wire by phosphatization is sent into saponification process device, carries out saponification process.

8. production equipment according to claim 7, it is characterised in that：Further include reuse water device, secondary water flushing device The waste water of discharge is passed straight back to without processing in phosphating pond, is recycled.

9. production equipment according to claim 8, it is characterised in that：Without detecting the member contained in water in reuse water device Cellulose content, using the pressure difference of water level, setting height of water level makes water flow back into phosphating pond by automatic pressure.

10. according to claim 1-3,6-9 any one of them production equipment, it is characterised in that：It further include drying unit.