KR101661670B1 - Intensive quenching apparatus for heat treatment - Google Patents

Intensive quenching apparatus for heat treatment Download PDF

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Publication number
KR101661670B1
KR101661670B1 KR1020150151646A KR20150151646A KR101661670B1 KR 101661670 B1 KR101661670 B1 KR 101661670B1 KR 1020150151646 A KR1020150151646 A KR 1020150151646A KR 20150151646 A KR20150151646 A KR 20150151646A KR 101661670 B1 KR101661670 B1 KR 101661670B1
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South Korea
Prior art keywords
workpiece
cooling water
flow rate
spray
spraying
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KR1020150151646A
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Korean (ko)
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이정호
손상호
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한국기계연구원
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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • 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
    • C21D1/667—Quenching devices for spray quenching

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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 Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

The present invention relates to a rapid cooling apparatus for heat treatment, and includes a workpiece supporting portion, an upper ejecting portion, a lower ejecting portion, and a plurality of side ejecting portions. The workpiece support supports the workpiece. The upper spray portion is disposed on the upper side of the workpiece, and the cooling water is sprayed onto the upper portion of the workpiece. The lower spray portion is disposed on the lower side of the workpiece, and the cooling water is sprayed to the lower portion of the workpiece. The plurality of side injection portions are disposed so as to be spaced apart from each other in the horizontal direction on the side portion of the workpiece, and the cooling water is sprayed to the side portion of the workpiece. The workpiece is rapidly cooled while simultaneously spraying the cooling water in the upper spray portion, the lower spray portion, and the plurality of side spray portions.

Description

Description of the Related Art [0002] Intensive quenching apparatus for heat treatment [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapid cooling apparatus for heat treatment, and more particularly, to a rapid cooling apparatus for heat treatment in which a plurality of injection portions are disposed around a heated workpiece for heat treatment and a cooling water is sprayed to workpieces from various directions through a plurality of injection portions .

When the heat treatment method is largely divided into two types, annealing for softening or homogenization by removing segregation and residual stress after casting or forging, normalizing for improving mechanical properties and machinability by making fine grains finer, Quenching for curing, and tempering for toughening can be categorized.

Double quenching is a typical example of the heat treatment. In the quenching treatment, a method of quenching from the austenitizing temperature is used in order to harden the steel. In the heating of the workpiece, it is necessary to heat the workpiece to a temperature higher than the transformation point of the workpiece to form an austenite structure. The workpiece should be cooled quickly and uniformly to secure a workpiece with excellent quality without deformation and cracks.

However, if the cooling rate, which is the cooling rate for quenching the heated workpiece, is increased unconditionally, it is not possible to secure a workpiece with high quality. In addition to the cooling rate, uniform cooling during the heat treatment can minimize the deformation due to the heat treatment.

1 is a diagram showing the possibility of crack formation with respect to a cooling rate in a heated workpiece. Referring to FIG. 1, in the range of a critical cooling rate (for example, about 350 DEG C / s) The possibility of formation of cracks is increasing more and more and the quality of the finally heat-treated workpiece is problematic.

Conventionally, a method of cooling a workpiece by immersing a heated workpiece in a vessel containing oil or polymer was used. In addition, in order to increase the cooling rate, a propeller was installed inside the vessel to induce rotational flow, Speed. However, this conventional method increases the cooling rate in the range below the critical cooling rate described above, so that the risk of forming cracks in the workpiece becomes higher.

Further, conventionally, oil or polymer is used for quenching, and environmental problems have arisen in subsequent measures for treating oil or polymer after heat treatment.

Korean Registered Patent No. 10-1492559 (Registered on May 5, 2015, entitled " Rapid cooling device for heat treatment "

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for disposing a plurality of jetting portions for jetting cooling water from a top, bottom, left and right sides of a heated workpiece, The present invention provides a rapid cooling apparatus for heat treatment capable of significantly increasing the cooling rate of a workpiece by controlling the flow rate and cooling the workpiece uniformly to minimize deformation of the workpiece.

According to an aspect of the present invention, there is provided a rapid cooling apparatus for heat treatment, comprising: a workpiece supporting unit for supporting a workpiece; An upper spraying portion disposed above the workpiece and spraying cooling water onto the workpiece; A lower spraying portion disposed below the workpiece and spraying cooling water to a lower portion of the workpiece; A plurality of side spray portions arranged to surround the front surface, the rear surface and the side surface of the workpiece and spaced apart from each other and spraying cooling water to the front surface, the rear surface and the side surface of the workpiece; And a flow rate controller for controlling a flow rate of the air injected from the upper ejector and the lower ejector such that a flow rate of the air injected from the upper injector is greater than a flow rate of air injected from the lower injector, And the cooling water is simultaneously sprayed from the lower spray portion and the side spray portion, thereby rapidly cooling the work.

According to another aspect of the present invention, there is provided a rapid cooling apparatus for heat treatment, comprising: a workpiece supporting unit for supporting a workpiece; An upper spraying portion disposed above the workpiece and spraying cooling water onto the workpiece; A lower spraying portion disposed below the workpiece and spraying cooling water to a lower portion of the workpiece; A side spray portion which is disposed so as to surround the front surface, the rear surface and the side surface of the workpiece, and injects cooling water onto the front surface, the rear surface and the side surface of the workpiece; And a flow rate controller for controlling a flow rate of the air injected from the upper ejector and the lower ejector such that a flow rate of the air injected from the upper injector is greater than a flow rate of air injected from the lower injector, And the cooling water is simultaneously sprayed from the lower spray portion and the side spray portion, thereby rapidly cooling the work.

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In the rapid cooling apparatus for heat treatment according to the present invention, the plurality of side injection portions may include a plurality of first side spray portions spaced apart from each other in a horizontal direction on a side portion of the workpiece, and spraying cooling water to a side portion of the workpiece; And a plurality of second side spray portions disposed below the plurality of first side spray portions and horizontally spaced apart from each other at a side portion of the workpiece and spraying cooling water to a side portion of the workpiece.

In the rapid cooling apparatus for heat treatment according to the present invention, the flow rate control unit controls the flow rate of the first side jetting part and the second side jetting part so that the flow rate of the second side jetting part is larger than the flow rate of the first side jetting part, It is possible to control the flow rate to be injected from the side jetting portion.

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In the rapid cooling apparatus for heat treatment according to the present invention, the side injection portion is disposed on a side portion of the workpiece, is spaced apart from the side portion of the workpiece and surrounds the side portion of the workpiece, A first side branching part for branching the first side branching part; A second side spraying part disposed on a side of the workpiece and spaced apart from a side of the workpiece so as to surround a side of the workpiece and disposed below the first side sprayer, ; ≪ / RTI >

In the rapid cooling apparatus for heat treatment according to the present invention, the flow rate control unit controls the flow rate of the first side jetting part and the second side jetting part so that the flow rate of the second side jetting part is larger than the flow rate of the first side jetting part, It is possible to control the flow rate to be injected from the side jetting portion.

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In the rapid cooling apparatus for heat treatment according to the present invention, the workpiece supporting portion can support the edge portion of the lower surface of the workpiece.

In the rapid cooling apparatus for heat treatment according to the present invention, the workpiece support portion may include a conveyor unit capable of transporting the workpiece in a horizontal direction.

In the rapid cooling apparatus for heat treatment according to the present invention, each of the upper spray portion, the lower spray portion, and the side spray portion includes a plurality of nozzles through which cooling water is sprayed, The upper spray portion, the lower spray portion, and the side spray portion, and the nozzles in the neighboring rows may be staggered from each other.

According to the rapid cooling apparatus for heat treatment of the present invention, the cooling rate of the workpiece can be greatly increased, and the workpiece can be cooled uniformly over the entire workpiece, thereby minimizing the deformation of the workpiece.

Further, according to the rapid cooling apparatus for heat treatment of the present invention, it is possible to uniformly maintain the cooling speeds in the upper and lower portions of the workpiece.

Further, according to the rapid cooling apparatus for heat treatment of the present invention, it is possible to uniformly and rapidly cool the entire side surface of the workpiece by keeping the cooling speed uniform over the entire side portion and the lower portion of the workpiece.

Fig. 1 is a diagram showing a possibility of crack formation with respect to a cooling rate in a heated workpiece,
2 is a schematic view of a rapid cooling apparatus for heat treatment according to an embodiment of the present invention,
FIG. 3 is a front view of the rapid cooling apparatus for heat treatment of FIG. 2,
FIG. 4 is a view for explaining the difference in flow rate between the upper spray portion and the lower spray portion in the rapid cooling apparatus for heat treatment of FIG. 2,
FIG. 5 is a view showing a case where the side injection portion has a multi-layer structure in the rapid cooling apparatus for heat treatment of FIG. 2,
6 is a schematic view of a rapid cooling apparatus for heat treatment according to another embodiment of the present invention,
7 is a cross-sectional view of the rapid cooling apparatus for heat treatment of FIG. 6,
FIG. 8 is a view showing a case where the side injection portion has a multi-layer structure in the rapid cooling apparatus for heat treatment of FIG. 6,
Fig. 9 is a view for explaining a case where the workpiece supporting portion of the rapid cooling device for heat treatment of Figs. 2 and 6 is a conveyor unit,
Fig. 10 is a view showing the nozzles of the ejection portion of the rapid cooling apparatus for heat treatment of Figs. 2 and 6. Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a rapid cooling apparatus for heat treatment according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic view of a rapid cooling apparatus for heat treatment according to an embodiment of the present invention, FIG. 3 is a front view of the rapid cooling apparatus for heat treatment of FIG. 2, and FIG. 4 is a cross- FIG. 5 is a view showing a case where the side injection portion has a multi-layer structure in the rapid cooling device for heat treatment of FIG. 2. FIG. 5 is a view for explaining a difference in flow rate between the upper spray portion and the lower spray portion.

Referring to FIGS. 2 to 5, the rapid cooling apparatus for heat treatment 100 according to the present embodiment includes a plurality of jetting portions disposed around a heated workpiece for heat treatment, and a plurality of jetting portions, And includes a workpiece support unit 110, an upper spray unit 120, a lower spray unit 130, a side spray unit 140, and a flow control unit (not shown).

The workpiece support 110 supports the heated workpiece 1 for heat treatment during rapid cooling.

2 and 3, the cooling water W is sprayed onto the upper portion, the lower portion and the side portion of the work 1 while the rapid cooling of the heated work 1 proceeds, 1, but it is not preferable to cover the entire lower surface of the work 1, and it is preferable that the contact area between the work supporting portion 110 and the work 1 is minimized.

Therefore, in the workpiece supporting portion 110 of the present embodiment, the portion corresponding to the center portion of the lower surface of the workpiece 1 is opened and the portion corresponding to the edge portion of the lower surface of the workpiece 1 is closed (for example, And can support the edge portion of the lower surface of the work 1.

On the other hand, the workpiece supporting portion 110 can support the workpiece 1 while contacting not only the lower surface of the workpiece 1 but also any portion of the workpiece 1. [

The upper spray part 120 is disposed on the upper side of the work 1 and injects cooling water W onto the upper part of the work 1. [

A plurality of nozzles 122 for spraying the cooling water W is formed on a surface of the upper spray portion 120 facing the work 1. [ The cooling water W pressurized in the cooling water pump (not shown) flows into the upper spray portion 120 through the inlet 121 and the cooling water W flowing into the upper spray portion 120 flows until a certain pressure And is injected into the upper surface of the work 1 through the plurality of nozzles 122 when the predetermined pressure is reached.

10, the plurality of nozzles 122 are formed in the upper spray portion 120 in the form of a plurality of rows 122a and 122b. In consideration of the cooling efficiency, the adjacent rows 122a and 122b, The nozzles 122 of the nozzles 122 are preferably arranged to be offset from each other rather than being arranged side by side.

The lower spray portion 130 is disposed below the work 1 and injects cooling water W to the lower portion of the work 1. [

A plurality of nozzles 132 for spraying the cooling water W are formed on the surface of the lower spray portion 130 facing the work 1. [ The cooling water W pressurized in the cooling water pump (not shown) flows into the lower spray part 130 through the inlet port 131 and the cooling water W flowing into the lower spray part 130 And is injected into the lower surface of the work 1 through the plurality of nozzles 132 when the pressure reaches a predetermined pressure.

The plurality of nozzles 132 formed in the lower spray portion 130 are also formed in a plurality of rows and the nozzles 132 in the neighboring rows are staggered from each other.

The side spray part 140 is disposed on the side of the work 1 and discharges the cooling water W to the side of the work 1. [

A plurality of nozzles 142 for spraying the cooling water W are formed on the side of the side spray part 140 facing the work 1. [ The cooling water W pressurized in the cooling water pump (not shown) flows into the side spray portion 140 through the inlet 141 and the cooling water W flowing into the side spray portion 140 is discharged And is injected into the lateral side of the work 1 through the plurality of nozzles 142 when the predetermined pressure is reached.

The plurality of nozzles 142 formed in the side jetting part 140 are also formed in a plurality of rows and the nozzles 142 in the neighboring rows are arranged alternately.

As shown in Figs. 2 and 3, a plurality of side jetting portions 140 are provided. Since the one side spray portion 140 can not cover the entire side portion of the work 1, when the rapid cooling is performed by only one side spray portion 140, the surface on which the cooling water W is sprayed and the surface (I.e., the surface where the cooling water W located on the opposite side of about 180 degrees is not contacted).

Therefore, in the present embodiment, the plurality of side spray portions 140 are disposed so as to be spaced apart from each other in the horizontal direction on the side of the work 1, so that the entire side of the work 1 can be cooled uniformly during rapid cooling. 2 and 3, the four lateral jetting portions 140 are spaced apart from each other by a distance of about 90 degrees, but two or more side jetting portions, for example, two side jetting portions of about 180 degrees , And the three side injection portions may be spaced apart from each other if they have an interval of about 120 degrees.

The rapid cooling apparatus for heat treatment 100 of the present embodiment is configured to include the upper spray portion 120, the lower spray portion 130, and the plurality of side spray portions 140 as described above. Since the cooling water W can be simultaneously sprayed to the entire surface of the work 1 through the upper spray portion 120, the lower spray portion 130 and the plurality of side spray portions 140, Can be increased above the critical cooling rate shown in Fig.

Therefore, the rapid cooling apparatus for heat treatment 100 of the present embodiment can uniformly cool the entire surface of the work 1, and can rapidly cool the workpiece 1 to a cooling speed higher than the critical cooling rate, The risk of crack formation can be reduced and the hardness of the heat-treated product can be improved.

The flow control unit (not shown) controls the flow rate of the fluid flowing through the upper spray part 120 and the lower spray part 130 such that the flow rate Q1 of the upper spray part 120 is different from the flow rate Q2 of the lower spray part 130, (130).

4, when the cooling water W is sprayed from the upper spray part 120 to the upper surface 1a of the workpiece, some of the cooling water collides with the upper surface 1a of the workpiece and then falls to the lower side of the workpiece 1 Some of the cooling water remains on the upper surface 1a of the workpiece to form the water film WF. On the contrary, when the cooling water W is sprayed from the lower spray portion 130 to the lower surface 1b of the workpiece, the entire cooling water collides with the lower surface 1b of the workpiece and falls downward along the direction of gravity toward the lower side of the workpiece 1, A water film is not formed on the lower surface 1b.

The water film W formed on the upper surface 1a of the workpiece interferes with the contact between the cooling water W sprayed on the upper surface 1a of the workpiece and the upper surface 1a of the workpiece, Which causes the lowering of the cooling efficiency of the upper portion of the work 1 relatively.

The flow rate control part of the present embodiment is configured such that the flow rate Q1 of the cooling water W injected from the upper spray part 120 to the upper part of the work 1 is injected from the lower spray part 130 to the lower part of the work 1 The cooling rate at the upper portion of the work 1 and the cooling rate at the lower portion of the work 1 are uniformly controlled by controlling the flow rate Q2 of the cooling water W to be higher than the flow rate Q2 of the cooling water W, So that rapid cooling can be performed.

On the other hand, there may be a modification to the plurality of side jetting portions 140 shown in Figs.

Referring to FIG. 5, as shown in FIG. 2, the side injection portion of the present modification is not constructed with a plurality of side injection portions in a single-layer structure, and a plurality of side injection portions may have a multi-layer structure. The side injection portion of the present modification may include a plurality of first side spray portions 146 and a plurality of second side spray portions 147. [

The plurality of first side spray portions 146 are disposed so as to be spaced apart from each other in the horizontal direction on the side of the work 1 and discharge the cooling water W to the side portion of the work 1. [

The plurality of second side spray portions 147 are disposed so as to be spaced apart from each other in the horizontal direction on the side of the work 1 and discharge the cooling water W to the side portion of the work 1, 146, respectively.

10, a plurality of nozzles for spraying the cooling water W are formed on the surfaces facing the work 1 in the first side injection portion 146 and the second side injection portion 147, respectively , The plurality of nozzles are formed in a plurality of rows, and the nozzles in the neighboring row are staggered from each other.

The cooling water W injected from the first side injection part 146 is sprayed onto the upper side surface 1c1 of the side surface 1c of the workpiece and the cooling water W injected from the second side spray part 147 is sprayed onto the workpiece And may be sprayed on the lower side surface 1c2 of the side surface 1c.

At this time, the flow rate control unit controls the flow rate Q3 of the cooling water jetted to the upper side surface 1c1 of the workpiece in the first side jetting part 146 and the flow rate Q2 of the cooling water jetted to the lower side surface 1c2 of the workpiece in the second side jetting part 147, The flow rates of the first and second side injection portions 146 and 147 are controlled so that the flow rates Q4 of the first side injection portion 146 and the second side injection portion 147 are different from each other.

It is generally known that the upper heat transfer coefficient along the direction of gravity is greater than the lower heat transfer coefficient. Therefore, if the flow rate of the cooling water sprayed on the upper side face 1c1 of the workpiece is the same as the flow rate of the cooling water sprayed on the lower side face 1c2 of the workpiece, the heat transfer coefficient of the upper side face is relatively larger, The cooling efficiency at the upper side face 1c1 is increased and uniform cooling processing for the side face 1c of the workpiece can not be performed.

Therefore, in the present variation, the flow rate control unit controls the flow amount Q4 of the cooling water jetted to the lower side surface 1c2 of the workpiece in the second side jetting section 147 to be larger than the flow rate Q4 of the cooling water flowing in the first side jetting section 146 from the upper side surface 1c1 So that the cooling speed at the upper side face 1c1 of the workpiece and the cooling speed at the lower side face 1c2 of the workpiece are uniformly maintained so that the side face 1c of the workpiece is uniformly cooled, So that uniform rapid cooling can be achieved over the entire range.

In FIG. 5, the plurality of side jet portions 146 and 147 are formed in a two-layer structure, but this is merely an example, and may be formed into various multi-layer structures of two or more layers such as three or four layers.

6 is a schematic view of a rapid cooling apparatus for heat treatment according to another embodiment of the present invention, FIG. 7 is a sectional view of the rapid cooling apparatus for heat treatment of FIG. 6, and FIG. 8 is a cross- In which the side injection portion has a multi-layer structure.

6 to 8, the members denoted by the same reference numerals as those shown in Figs. 2 to 5 have the same configuration and function, and a detailed description thereof will be omitted.

6 to 8, the rapid cooling apparatus for heat treatment 200 according to the present embodiment includes a workpiece supporting unit 110, an upper ejecting unit 120, a lower ejecting unit 130, a side ejecting unit 240, and a flow controller (not shown).

The side injection part 240 is disposed so as to be spaced apart from the side of the work 1 and injects the cooling water W to the side of the work 1. [ The side spray portion 240 of this embodiment is characterized in that it is formed so as to surround the side portion of the work 1.

6 and 7, the side jetting part 240 includes an inner wall 242 disposed to be spaced apart from the side of the work 1, and a plurality of side walls 242 which are arranged to be spaced apart from the inner wall 242 An outer wall 243 and an inner receiving portion 244 formed between the inner wall 242 and the outer wall 243. [ 6 and 7, the side injection part 240 is formed in a donut shape. However, the side injection part 240 can be formed in various shapes such as a rectangular shape.

A plurality of nozzles for spraying the cooling water W are formed in the inner wall 242 of the side spray part 240 facing the work 1. [ The cooling water W pressurized in the cooling water pump (not shown) flows into the inner accommodating portion 244 through the inlet 241 formed in the outer wall 243 and the cooling water W flowing into the inner accommodating portion 244 flows Is received in the inner accommodating portion 244 until a predetermined pressure is reached, and is sprayed to the side of the work 1 through the plurality of nozzles when the pressure reaches a predetermined pressure.

The plurality of nozzles formed in the side spray portion 240 are also formed in a plurality of rows, and the nozzles in the neighboring rows are staggered.

Since the side spray portion 240 of the present embodiment is formed so as to surround the side portion of the work 1 unlike the side spray portion 140 shown in FIGS. 2 and 3, only one side spray portion 240 allows the work 1 Can be covered.

The rapid cooling apparatus for heat treatment 200 of the present embodiment is configured to include the upper spray portion 120, the lower spray portion 130 and the side spray portion 240 as described above. The upper spray portion 120, The cooling water W can be simultaneously sprayed to the entire surface of the work 1 through the side spray part 130 and the side spray part 240. [

Accordingly, the rapid cooling apparatus for heat treatment 200 of the present embodiment can uniformly cool the entire surface of the workpiece 1, and can rapidly cool the workpiece 1 to a cooling speed higher than the critical cooling rate, The risk of crack formation can be reduced and the hardness of the heat-treated product can be improved.

The flow rate control unit of the present embodiment also controls the flow rate Q1 of the cooling water W injected to the upper portion of the workpiece 1 from the upper spray portion 120 to the lower side of the work 1 from the lower spray portion 130 W of the work 1 by controlling the cooling rate at the upper portion of the work 1 and the cooling rate at the lower portion of the work 1 to be uniform, .

On the other hand, there may be a modification to the side jetting part 240 shown in Figs. 6 and 7.

Referring to FIG. 8, the side injection portion of the present modified embodiment is not a single-layered side injection portion as shown in FIG. 6, and the side injection portion may have a multi-layer structure. The side injection portion of the present modification example may include a first side injection portion 246 and a second side injection portion 247.

The first side spray portion 246 is disposed on the side of the work 1 and is formed so as to surround the side portion of the work 1 apart from the side of the work 1 and has cooling water W ).

The second side spray portion 247 is disposed on the side of the work 1 and is formed so as to surround the side portion of the work 1 apart from the side portion of the work 1 and has cooling water W And is disposed on the lower side of the first side jetting part 246. [

The flow rate control portion of the present modification also has the flow rate Q5 of the cooling water jetted to the upper side face 1c1 of the workpiece at the first side jetting portion 246 and the flow rate Q5 of the cooling water at the lower side face 1c2 of the workpiece at the second side jetting portion 247 And controls the flow rate of the first side jetting part 246 and the second side jetting part 247 so that the flow rate Q6 of the cooling water to be jetted may be different from each other.

The flow rate control unit controls the flow rate Q6 of the cooling water injected from the second side jetting unit 247 to the lower side surface 1c2 of the workpiece to the upper side surface 1c1 of the workpiece in the first side jetting unit 246 The cooling rate at the upper side face 1c1 of the workpiece and the cooling speed at the lower side face 1c2 of the workpiece are uniformly controlled so that the uniformly rapid Allow cooling to take place.

In the rapid cooling apparatus for heat treatment of the present invention configured as described above, a plurality of jetting portions are arranged so as to jet the cooling water to the workpiece from the top and bottom, left and right sides of the heated workpiece, and the cooling water is jetted at the same time, It is possible to obtain an effect that the deformation of the workpiece can be minimized by uniformly cooling the whole workpiece.

In the rapid cooling apparatus for heat treatment of the present invention configured as described above, the cooling rate of the upper and lower parts of the workpiece is controlled by controlling the flow rate of the cooling water jetted from the upper jetting section and the flow rate of the cooling water jetted from the lower jetting section It is possible to obtain an effect that uniformity can be maintained.

Further, the rapid cooling apparatus for heat treatment of the present invention constructed as described above has a multilayer structure in which the side injection portions are formed, and the flow rate of the cooling water injected from each of the injection portions is controlled, The cooling rate can be uniformly maintained, so that uniform rapid cooling can be achieved over the entire side surface of the workpiece.

The workpiece support 110 shown in FIG. 3 holds the workpiece stationary, but as shown in FIG. 9, the workpiece support of the present invention is in the form of a conveyor unit 111 that can transport the workpiece 1 horizontally. It is possible.

The workpiece 1 heated in the previous process is transferred through the conveyor unit 111 and temporarily stopped and the cooling water W is sprayed from the upper spray portion 120, the lower spray portion 130 and the side spray portion, respectively The workpiece 1 can be rapidly cooled. Thereafter, when the rapid cooling process is completed, the workpiece 1 can be conveyed to the subsequent process through the conveyor unit 111 again.

The scope of the present invention is not limited to the above-described embodiments and modifications, but can be implemented in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

100: Rapid cooling system for heat treatment
110: workpiece support
120:
130:
140:
W: Cooling water

Claims (13)

A workpiece supporting member for supporting the workpiece;
An upper spraying portion disposed above the workpiece and spraying cooling water onto the workpiece;
A lower spraying portion disposed below the workpiece and spraying cooling water to a lower portion of the workpiece;
A plurality of side spray portions arranged to surround the front surface, the rear surface and the side surface of the workpiece and spaced apart from each other and spraying cooling water to the front surface, the rear surface and the side surface of the workpiece; And
And a flow rate controller for controlling a flow rate of the air injected from the upper ejector and the lower ejector such that a flow rate of the air injected from the upper injector is greater than a flow rate of air injected from the lower injector,
Wherein the workpiece is rapidly cooled while simultaneously spraying the cooling water in the upper spray portion, the lower spray portion, and the side spray portion. A workpiece supporting member for supporting the workpiece;
An upper spraying portion disposed above the workpiece and spraying cooling water onto the workpiece;
A lower spraying portion disposed below the workpiece and spraying cooling water to a lower portion of the workpiece;
A side spray portion which is disposed so as to surround the front surface, the rear surface and the side surface of the workpiece, and injects cooling water onto the front surface, the rear surface and the side surface of the workpiece; And
And a flow rate controller for controlling a flow rate of the air injected from the upper ejector and the lower ejector such that a flow rate of the air injected from the upper injector is greater than a flow rate of air injected from the lower injector,
Wherein the workpiece is rapidly cooled while simultaneously spraying the cooling water in the upper spray portion, the lower spray portion, and the side spray portion. delete delete The method according to claim 1,
Wherein the plurality of side-
A plurality of first side spray portions spaced apart from each other in a horizontal direction on a side portion of the work and spraying cooling water on a side portion of the work;
And a plurality of second side spray portions spaced from each other in a horizontal direction on the side of the workpiece and disposed below the plurality of first side spray portions and spraying cooling water to a side portion of the workpiece Rapid cooling apparatus for heat treatment. 6. The method of claim 5,
And the flow rate control unit controls the flow rate of the first side jetting unit and the second side jetting unit such that the flow rate of the second side jetting unit is larger than the flow rate of the first side jetting unit And a cooling device for rapid thermal processing. delete 3. The method of claim 2,
The side-
A first side spraying part disposed on a side of the workpiece and spaced apart from the side of the workpiece to surround the side of the workpiece and spraying cooling water to a side of the workpiece;
A second side spraying part disposed on a side of the workpiece and spaced apart from a side of the workpiece so as to surround a side of the workpiece and disposed below the first side sprayer, And a cooling device for cooling the rapid cooling device for heat treatment. 9. The method of claim 8,
And the flow rate control unit controls the flow rate of the first side jetting unit and the second side jetting unit such that the flow rate of the second side jetting unit is larger than the flow rate of the first side jetting unit And a cooling device for rapid thermal processing. delete 3. The method according to claim 1 or 2,
Wherein the workpiece supporting portion supports the edge portion of the lower surface of the workpiece. 3. The method according to claim 1 or 2,
Wherein the workpiece supporting portion includes a conveyor unit capable of conveying the workpiece in a horizontal direction. 3. The method according to claim 1 or 2,
Wherein each of the upper spray portion, the lower spray portion, and the side spray portion includes a plurality of nozzles through which cooling water is sprayed,
Wherein the plurality of nozzles are formed in the upper spray portion, the lower spray portion, and the side spray portion in a plurality of rows, respectively,
Wherein the nozzles in the neighboring rows are arranged alternatingly with each other.
KR1020150151646A 2015-10-30 2015-10-30 Intensive quenching apparatus for heat treatment KR101661670B1 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR101829614B1 (en) * 2017-11-30 2018-02-19 권병세 Device for heat treatment of metal plate

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Publication number Priority date Publication date Assignee Title
KR101492559B1 (en) 2014-10-20 2015-02-12 (주)이진히팅시스템 Quenching Apparatus for Heat Treatment
KR20150061463A (en) * 2013-11-27 2015-06-04 동국제강주식회사 Apparatus for water cooling h-beam of rolling line
KR101532010B1 (en) * 2014-03-26 2015-06-26 동국제강 주식회사 Apparatus for water cooling h-beam flange of rolling line

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KR20150061463A (en) * 2013-11-27 2015-06-04 동국제강주식회사 Apparatus for water cooling h-beam of rolling line
KR101532010B1 (en) * 2014-03-26 2015-06-26 동국제강 주식회사 Apparatus for water cooling h-beam flange of rolling line
KR101492559B1 (en) 2014-10-20 2015-02-12 (주)이진히팅시스템 Quenching Apparatus for Heat Treatment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101829614B1 (en) * 2017-11-30 2018-02-19 권병세 Device for heat treatment of metal plate

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