CN115478150A - Direct quenching bath tank for spinning high-speed wire and quenching method thereof - Google Patents
Direct quenching bath tank for spinning high-speed wire and quenching method thereof Download PDFInfo
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- CN115478150A CN115478150A CN202210888934.8A CN202210888934A CN115478150A CN 115478150 A CN115478150 A CN 115478150A CN 202210888934 A CN202210888934 A CN 202210888934A CN 115478150 A CN115478150 A CN 115478150A
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- 238000010791 quenching Methods 0.000 title claims abstract description 37
- 230000000171 quenching effect Effects 0.000 title claims abstract description 36
- 238000009987 spinning Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 106
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims description 38
- 238000005507 spraying Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000012266 salt solution Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 229910000677 High-carbon steel Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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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
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
- C21D1/64—Quenching devices for bath quenching with circulating liquids
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention particularly relates to a direct quenching bath tank after spinning of a high wire and a using method thereof. According to the thickness of the processed wire and the salt bath process parameters, the opening size of the salt discharge port and the frequency of the molten salt pump are adjusted, so that the upper bath tank obtains salt bath liquid with stable liquid level height, the wire obtains ideal cooling speed, the temperature of the sprayed salt bath liquid is increased after the wire is cooled by the sprayed salt bath liquid, and the sprayed salt bath liquid flows to the rear end of the upper bath tank along the advancing direction of the wire and enters the lower bath tank through the salt discharge port. The bath is specially designed according to the accumulation mode, the advancing characteristic and the phase change characteristic of the wires after spinning, so that the performance of the wires is greatly improved, and the performance fluctuation of the same circle is reduced.
Description
Technical Field
The invention relates to the technical field of steel rolling in the metallurgical industry, in particular to a direct quenching bath tank after spinning of a high wire and a quenching method thereof.
Background
At present, after wire rods of a high-speed rolling mill are spun, density degrees at different positions are different during roller way transportation, and particularly, the stacking thickness difference of wire rods at two sides and the middle position of a roller way is very large, so that the difficulty is brought to controlling cooling to enable the wire rods to obtain good identical-circle tissue performance uniformity. The cooling of traditional fan adopts good luck device, piles up the condition according to the wire rod and distributes the amount of wind and improve same circle homogeneity, nevertheless because of the air heat conductivity is relatively lower, is difficult to control temperature upper and lower limit and very easily appears bad tissue. Particularly, for large-size wire rods, due to the fact that the stacking is thick, on one hand, the core of the wire rod at the middle position cannot obtain enough cooling speed even if the air quantity is increased, so that a pro-eutectoid structure appears, and on the other hand, the surface of the wire rod is too fast due to the fact that the air quantity is excessively increased, so that a martensite structure appears.
The quenching of liquid media such as salt bath, lead bath and the like can overcome the defect of air cooling, but new problems can be generated if the bath is not designed reasonably. British patent GB2062692A, multi-purpose apparatus for cutting hot rolled steel wire rod, provides a salt bath treatment tank for hot rolled wire rod, which adopts two salt tanks in front and back, one for quick cooling and the other for constant temperature phase change. Because the quick cooling groove needs to adopt salt bath with lower temperature to realize the purpose of quickly cooling the wire rod, and when the wire rod is cooled at the salt temperature, bainite structures often appear at the position of the secondary surface, which causes adverse effects on the plasticity of the wire rod.
In response to this problem, the US patent 5578150a Heat treatment process for wires provides a solution to the problem of using a salt bath, and arranging a salt solution spraying device at the position of the salt bath higher than or immersed in the salt solution at the inlet end of the wire rod to enhance cooling and achieve rapid cooling. As the sprayed salt solution is taken from the same salt bath, the bainite abnormal structure caused by low salt temperature is effectively avoided. However, because the yield of the high-speed wire rod is about 100 tons/hour, the heat brought by the high-speed wire rod is as high as 2.3E-10J/h, and a large amount of instantaneous heat is concentrated at the inlet end of the bath tank, the salt solution cannot be cooled and rapidly rises, so that a pre-eutectoid structure occurs, and the product performance is adversely affected. On the other hand, the natural defect of uneven thickness of the wire rod in different areas on the high-speed wire rod conveying roller way only depends on the convection heat exchange of the bath liquid, and a local overheating area appears in the bath liquid, so that the cooling speed of the wire rod is reduced to generate a eutectoid structure, and finally the performance uniformity of the same-circle structure cannot be effectively improved.
Disclosure of Invention
The invention aims to provide a direct quenching bath and a quenching method thereof after high-speed wire spinning, wherein the bath is specially designed according to the accumulation mode, the advancing characteristic and the phase change characteristic of wires after spinning, and compared with the traditional air-cooled wires, the bath can greatly improve the performance of the wires and reduce the performance fluctuation of the same circle.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a direct quenching bath after altitude is spun includes bath, lower bath, rollgang, spray piping system, molten salt pump, go up the bath setting in the top of bath down, the rollgang is laid in last bath along last bath length direction, the molten salt pump is connected with spray piping system, spray piping system sets up in last bath top, the molten salt pump sets up outside the bath down, the end of the interior salt bath liquid flow direction of last bath sets up the salt discharge mouth.
Preferably, the bath cooling device is arranged in the lower bath.
Preferably, the spray pipeline system comprises two groups of spray pipes, the two groups of spray pipes respectively comprise an inner spray pipe and an outer spray pipe, and the inner spray pipe and the outer spray pipe are respectively communicated with a molten salt pump.
Preferably, the salt discharging port is covered with a baffle, and the size of the opening of the salt discharging port is controlled by adjusting the position of the baffle.
Preferably, the rollgang comprises a plurality of rollers transversely penetrating through the upper bath and a driving motor for driving the rollers to rotate.
Preferably, the rotating speed of the roller is 0.1-1.0m/s, the diameter of the roller is more than or equal to 100mm, and the roller is made of heat-resistant stainless steel.
The invention also provides a quenching method which comprises the following steps:
(1) Determining the salt bath temperature T and the salt bath time T according to the chemical components of the produced wire and the required microstructure and mechanical properties of the produced wire by CCT and TTT curves of steel;
(2) Determining the conveying speed mu of the conveying roller way according to the length L of the upper bath and the salt bath time t, wherein mu = L/t m/s;
(3) Calculating the stacking thickness h of the wire on the conveying roller way according to the specification d of the wire, the rolling speed ν and the conveying speed μ of the conveying roller way, wherein h = d × v/μ pi mm;
(4) According to the wire stacking thickness h, determining the opening frequency chi of the molten salt pump, wherein chi is more than 0 and less than or equal to 50Hz, and the opening degree lambda of a salt discharge port, wherein lambda is more than 0 and less than 1, so that a certain liquid level height h1 is formed in the upper bath, and h1= (nf chi/50 x lambda A Cq) is satisfied, wherein h1 is more than h 2 The number of the molten salt pumps is n, the maximum flow rate of the molten salt pumps is f, the maximum opening area of a salt discharge port is A, cq is a flow coefficient, and Cq is a constant and takes a value of 0.6-0.65;
(5) The molten salt pump is started to inject the salt bath liquid in the lower bath tank into the upper bath tank,
(6) After the preparation work is finished, the conveying roller way is opened, the spinning machine starts spinning, the wire rod coil falls on the conveying roller way, the wire rod coil is conveyed by the conveying roller way through the upper bath, and the wire rod coil is collected into a finished product by the coil collecting station after quenching treatment is finished.
Preferably, in order to reduce the performance difference of the wire rod coiling in the same circle, the frequency of the molten salt pump connected with the outer spraying pipe is 5% -25% higher than that of the molten salt pump connected with the inner spraying pipe.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the bath with two box structures and utilizing the large-flow molten salt pump and the spraying pipeline, the salt bath liquid forms large circulation in the whole bath, the large temperature difference between the end of local wires entering the salt bath liquid and the end of local wires exiting the salt bath liquid is avoided, the wires complete phase change in a constant temperature environment, and the performance stability and uniformity of the wires are improved; meanwhile, aiming at the inherent characteristic that the high-speed wires are uneven in thickness on the conveying roller way, local convection is enhanced by adjusting the frequency of the molten salt pump, so that the cooling speeds of the wires in different accumulation thickness areas tend to be consistent, and the performance uniformity of the wires in the same circle is improved.
Drawings
FIG. 1 is a front view of a direct quenching bath after high-speed wire spinning according to the present invention;
FIG. 2 is a top view of the direct quench bath after high wire spinning according to the present invention;
FIG. 3 is a schematic structural view of a direct quenching bath spray piping system after high-speed wire spinning.
In the figure: the device comprises an upper bath 1, a lower bath 2, a conveying roller way 3, a spray pipeline system 4, an inner spray pipe 41, an outer spray pipe 42, a molten salt pump 5, a bath liquid cooler 6, a salt discharge port 7, a baffle plate 8, a close-packed roller way 9 and a transition roller way 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the embodiment provides a direct quenching bath after high-speed wire spinning, which is used for high-carbon steel sorbitizing isothermal quenching, and comprises an upper bath 1, a lower bath 2, a conveying roller way 3, a spraying pipeline system 4, a molten salt pump 5 and a bath liquid cooler 6, wherein the upper bath 1 is arranged above the lower bath 2, the conveying roller way 3 is laid in the upper bath 1 along the length direction of the upper bath 1, the molten salt pump 5 is connected with the spraying pipeline system 4, the spraying pipeline system 4 is arranged above the upper bath 1, 5 sets of the spraying pipeline system 4 are shown in the figure, the molten salt pump 5 is arranged outside the lower bath 2, a salt discharge port 7 is arranged at the tail end of the salt bath liquid in the upper bath 1 in the flowing direction, a baffle 8 is covered on the salt discharge port 7, the opening size of the salt discharge port 7 is controlled by adjusting the position of the baffle 8, and the bath liquid cooler 6 is arranged in the lower bath 2. The salt bath of this example consisted of molten nitrate salt and was used at a temperature of 220-600 ℃. The upper bath 1 of the embodiment has a length of 15m, a width of 1.2m and a depth of 0.8m; the lower bath 2 has a length of 15m, a width of 3 m and a depth of 1.2 m. The size of the salt discharge opening 7 is 1m × 1m. The adjustment of the baffle 8 is carried out in an electric manner, such as in the prior art of a motor, an electric cylinder and the like.
The size of the upper bath 1 can be specially designed according to the process requirement, wherein the length is more than or equal to the phase change characteristic of the quenching wire rod, namely the product of the phase change completion time and the conveying speed of the conveying roller way, the width is determined by the diameter of a coil of the spinning machine and the position deviation of the coil on the conveying roller way, and the depth is determined by the stacking thickness of the wire rod determined by the diameter of the wire rod, the spinning speed and the conveying speed of the conveying roller way.
As shown in fig. 3, as a preferred embodiment of this embodiment, the spray pipe system 4 includes two groups of spray pipes, which in turn include an inner spray pipe 41 and an outer spray pipe 42, respectively, and the inner spray pipe 41 and the outer spray pipe 42 are respectively communicated with one molten salt pump 5. Wherein, the outer spray pipes 42 are respectively arranged right above the wires at the two sides of the conveying roller way 3, and the inner spray pipes 41 are arranged right above the wires at the middle position of the conveying roller way 3. Each spray pipe is 100mm in diameter and 1.5m long, and is arranged in parallel along the advancing direction of the wire rod. Fig. 2 is a layout of each group of shower pipes above the upper bath 1. Each spray pipe is communicated with a molten salt pump 5, the molten salt pump 5 is a variable frequency pump, and the flow rate is more than or equal to 50m 3 H, the lift is more than or equal to 1.5m. When the device works, the molten salt pump 5 is started, and the salt bath solution is sprayed to the specified position of the wire coil through the inner spray pipe 41 and the outer spray pipe 42. The spraying pipe is made of DN100 stainless steel pipe and is L-shaped, one end of the spraying pipe is communicated with the molten salt pump 5, the other end of the spraying pipe is blocked, a hole is punched in an interval parallel to the wire rod coiling direction to form a spraying section, and the spraying speed of the salt bath liquid is 0-2.5m/s after the molten salt pump 5 is started.
As a preferred embodiment of this embodiment, the rollgang 3 comprises a plurality of rollers that transversely penetrate the upper bath 1 and a drive motor (not shown in the figures) that drives the rollers in rotation. The diameter of the roller is more than or equal to 100mm, the roller is made of heat-resistant stainless steel, the roller is driven by a driving motor to rotate and is used for conveying a wire rod coil to enter and exit the upper bath 1, and the roller speed is adjustable within the speed range of 0.1-1.0 m/s. The front end of the conveying roller way 3 is connected with a close-packed roller way 9 under the high-speed wire laying machine, and the rear end is connected with a transition roller way 10 and enters a coil collecting station.
According to the thickness of the processed wire and the salt bath process parameters, the opening size of the salt discharge opening 7 and the frequency of the molten salt pump 5 are adjusted, so that the upper bath 1 obtains the salt bath liquid with stable liquid level height, and simultaneously the wire obtains ideal cooling speed. The sprayed salt bath liquid cools the wire rod, then the temperature of the wire rod rises, and the salt bath liquid flows to the rear end of the upper bath tank 1 along the advancing direction of the wire rod and enters the lower bath tank 2 through the salt discharge port 7. The high-temperature salt solution entering the lower bath 2 from the salt discharge port 7 passes through the bath liquid cooler 6 under the action of the pump, is cooled and then is injected into the upper bath 1 again through the pump and the injection pipe for recycling.
The embodiment also provides a quenching method:
(1) According to the chemical components of the produced wire rod and the required microstructure and mechanical properties, determining the salt bath temperature T and the salt bath time T according to CCT (continuous casting temperature) and TTT (thermal treatment time) curves of the steel by checking literature data such as a manual and the like, measuring by using a thermal expansion instrument and the like or calculating by using simulation software such as JMatpro and the like;
(2) Determining the conveying speed mu of the conveying roller way 3 according to the length L of the upper bath 1 and the salt bath time t, wherein mu = L/t m/s;
(3) Calculating the stacking thickness h of the wire on the conveying roller way 3 according to the specification d of the wire, the rolling speed ν and the conveying speed μ of the conveying roller way 3, wherein h = d × v/μ pi mm;
(4) According to the wire stacking thickness h, determining the opening frequency chi of the molten salt pump 5, wherein chi is more than 0 and less than or equal to 50Hz, and the opening degree lambda of the salt discharge port 7, wherein lambda is more than 0 and less than 1, so that a certain liquid level height h1 is formed in the upper bath 1, and h1 & gth and h1= (nf chi/50 lambda A = (Cq)) 2 The number of the molten salt pumps 5 is n, the maximum flow of the molten salt pumps 5 is f, the maximum opening area of the salt discharge port 7 is A, cq is a flow coefficient, cq is a constant and takes a value of 0.6-0.65;
(5) Starting a molten salt pump 5 to inject the salt bath liquid in the lower bath tank 2 into the upper bath tank 1, and setting the frequency of the molten salt pump 5 connected with an outer spray pipe 42 to be 5-25% higher than that of the molten salt pump 5 connected with an inner spray pipe 41 in order to reduce the same-circle performance difference of the wire rod coiling;
(6) After the preparation work is finished, the conveying roller way 3 is opened, the wire laying machine starts laying wires, the wire rod coil falls on the conveying roller way 3, the wire rod coil is conveyed by the conveying roller way 3 to pass through the upper bath 1, and a finished product is collected by the coil collecting station after quenching treatment is finished.
The quenching method of the present embodiment is described in further detail below by way of an example:
according to the method for directly quenching the high-carbon steel wire rod YL82B after high-speed wire spinning, by adopting the quenching tank and the quenching method, the salt bath temperature required by the YL82B wire rod is 500-520 ℃, the sorbite transformation is completed only by 20s, but the conveying speed of the conveying roller way is set to be 0.2m/s in consideration of the influences of component segregation and the radial temperature gradient of the wire rod, namely the salt bath isothermal quenching time is 75s, so that the complete transformation of a core tissue is ensured. YL82B wire rod diameter is 12.5mm, and rolling speed is 35m/s, and the maximum stacking thickness is about 150mm when the conveying speed of rollgang is 0.2 m/s. The frequency of a molten salt pump connected with the outer spraying pipe is set to be 40HZ, the frequency of a molten salt pump connected with the inner spraying pipe is set to be 32HZ, and the liquid level height of the upper bath is 400mm. Although all the other production parameters of the high-speed wire are the same as those adopted in the production of the traditional air-cooled wire, the average value of the tensile strength of the wire rod of YL82B after being spun is 1230MPa after being subjected to salt bath isothermal quenching treatment, and the strength difference of the same ring is less than or equal to 25MPa; the average value of the tensile strength of the traditional air-cooled material is 1180MPa, and the strength difference of the same ring is less than or equal to 60MPa.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A direct quenching bath after spinning of high-speed wire is characterized in that: including last bath, lower bath, rollgang, spray piping system, molten salt pump, go up the bath setting in the top of lower bath, the rollgang is laid in last bath along last bath length direction, the molten salt pump is connected with spray piping system, spray piping system sets up in last bath top, the molten salt pump sets up outside lower bath, the end of the interior salt bath liquid flow direction of last bath sets up the salt discharge mouth.
2. The direct quenching bath after high-speed wire spinning according to claim 1, characterized in that: the bath foam cooling device is arranged in the lower bath.
3. The direct quenching bath after high-speed wire spinning according to claim 1, characterized in that: the spray pipeline system comprises two groups of spray pipes, the two groups of spray pipes respectively comprise an inner spray pipe and an outer spray pipe, and the inner spray pipe and the outer spray pipe are respectively communicated with a molten salt pump.
4. The direct quenching bath after high-speed wire spinning according to claim 1, characterized in that: the salt discharge port is covered with a baffle, and the opening size of the salt discharge port is controlled by adjusting the position of the baffle.
5. The direct quenching bath after high-speed wire spinning according to claim 1, characterized in that: the conveying roller way comprises a plurality of rollers transversely penetrating through the upper bath and a driving motor driving the rollers to rotate.
6. The post-wire laying direct quenching bath according to claim 5, characterized in that: the rotating speed of the roller is 0.1-1.0m/s, the diameter of the roller is more than or equal to 100mm, and the roller is made of heat-resistant stainless steel.
7. A quenching method adopting the direct quenching bath tank after high-speed wire spinning of any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) Determining the salt bath temperature T and the salt bath time T according to the chemical components of the produced wire and the required microstructure and mechanical properties of the produced wire by CCT and TTT curves of steel;
(2) Determining the conveying speed mu of the conveying roller way according to the length L of the upper bath and the salt bath time t, wherein mu = L/tm/s;
(3) Calculating the stacking thickness h of the wire on the conveying roller way according to the specification d of the wire, the rolling speed ν and the conveying speed μ of the conveying roller way, wherein h = d × v/μ pi mm;
(4) According to the wire stacking thickness h, determining the opening frequency chi of the molten salt pump, wherein chi is more than 0 and less than or equal to 50Hz, and the opening degree lambda of a salt discharge port, wherein lambda is more than 0 and less than 1, so that a certain liquid level height h1 is formed in the upper bath, and h1= (nf chi/50 x lambda A Cq) is satisfied, wherein h1 is more than h 2 The number of the molten salt pumps is n, the maximum flow rate of the molten salt pumps is f, the maximum opening area of a salt discharge port is A, cq is a flow coefficient, and Cq is a constant and takes a value of 0.6-0.65;
(5) The molten salt pump is started to inject the salt bath liquid in the lower bath tank into the upper bath tank,
(6) After the preparation work is finished, the conveying roller way is opened, the wire spinning machine starts spinning, the wire rod coil falls on the conveying roller way, the wire rod coil is conveyed by the conveying roller way to pass through the upper bath, and the wire rod coil is collected into a finished product by the coil collecting station after quenching treatment is finished.
8. The quenching method according to claim 7, characterized in that: in order to reduce the poor performance of the wire rod coiling in the same circle, the frequency of a molten salt pump connected with the outer spraying pipe is 5% -25% higher than that of a molten salt pump connected with the inner spraying pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210888934.8A CN115478150A (en) | 2022-07-27 | 2022-07-27 | Direct quenching bath tank for spinning high-speed wire and quenching method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210888934.8A CN115478150A (en) | 2022-07-27 | 2022-07-27 | Direct quenching bath tank for spinning high-speed wire and quenching method thereof |
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| CN115478150A true CN115478150A (en) | 2022-12-16 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5578150A (en) * | 1992-07-28 | 1996-11-26 | Nippon Steel Corporation | Heat treatment process for wire rods |
| WO2007023696A1 (en) * | 2005-08-23 | 2007-03-01 | Sumitomo Electric Industries, Ltd. | Direct heat treatment method and equipment of hot rolled wire rod |
| JP2007239069A (en) * | 2006-03-10 | 2007-09-20 | Nippon Steel Corp | In-line heat treatment equipment and in-line heat treatment method of loose coil |
| JP2007284764A (en) * | 2006-04-19 | 2007-11-01 | Nippon Steel Corp | Facility for cooling loose coil, and cooling method |
| CN105671269A (en) * | 2016-03-30 | 2016-06-15 | 张家港市东航机械有限公司 | Liquid storage tank of steel wire water-bath quenching unit |
| CN110904320A (en) * | 2019-11-14 | 2020-03-24 | 北京机电研究所有限公司 | Precision heat treatment production line for thin-wall special-shaped aluminum component |
-
2022
- 2022-07-27 CN CN202210888934.8A patent/CN115478150A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5578150A (en) * | 1992-07-28 | 1996-11-26 | Nippon Steel Corporation | Heat treatment process for wire rods |
| WO2007023696A1 (en) * | 2005-08-23 | 2007-03-01 | Sumitomo Electric Industries, Ltd. | Direct heat treatment method and equipment of hot rolled wire rod |
| JP2007239069A (en) * | 2006-03-10 | 2007-09-20 | Nippon Steel Corp | In-line heat treatment equipment and in-line heat treatment method of loose coil |
| JP2007284764A (en) * | 2006-04-19 | 2007-11-01 | Nippon Steel Corp | Facility for cooling loose coil, and cooling method |
| CN105671269A (en) * | 2016-03-30 | 2016-06-15 | 张家港市东航机械有限公司 | Liquid storage tank of steel wire water-bath quenching unit |
| CN110904320A (en) * | 2019-11-14 | 2020-03-24 | 北京机电研究所有限公司 | Precision heat treatment production line for thin-wall special-shaped aluminum component |
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