KR100742586B1 - Heat-treatment furnace system with cooling system - Google Patents

Abstract

A heat-treatment system with a cooling unit is provided to uniformly quench the heat treatment object according to heat treatment and cooling conditions even in case of a large heat treatment object or a complicated heat treatment object by comprising a heating furnace using an electrothermal wire and a cooling unit integrally formed with the heating furnace. A heat-treatment system with a cooling unit comprises: a heating furnace(100) of which a bottom face is opened such that a heat treatment object(10) placed on the ground is housed in the heating furnace, and which has at least one gas inflow hole(130) formed in one side face thereof, and a heat insulator layer(110) and an electrothermal wire(120) formed on an inner side face thereof such that the electrothermal wire is formed on the heat insulator layer; a lifting-and-lowering unit(200) for moving the heating furnace up and down to contact the heating furnace with the ground or separate the heating furnace from the ground; and a cooling unit(300) including an annular pipe(310) which is installed around the placed heat treatment object, and in which cooling water is circulated, and has a plurality of inclination angle adjustable nozzles(301) and at least one cooling water flow controlling valves(302) installed on an outer peripheral surface thereof to discharge cooling water in the pipe onto the heat treatment object, wherein the cooling unit additionally includes a plurality of auxiliary pipes(320) which are vertically installed, and on each of which a plurality of inclination angle adjustable nozzles and cooling water flow controlling valves are installed, and wherein the heating furnace has at least one air exhaust hole(140) formed in a side face thereof.

Description

Heat treatment device with cooling means {HEAT-TREATMENT FURNACE SYSTEM WITH COOLING SYSTEM}

1 is a perspective view of a heat treatment apparatus having a cooling means according to the present invention.

2 and 3 is a state diagram used in accordance with a preferred embodiment of the present invention.

Figure 4 is a state diagram used in accordance with another preferred embodiment of the present invention.

5 is a plan view of FIG. 4.

** Description of the symbols for the main parts of the drawings **

10: heat treatment 20: cooling water

100: heating furnace 200: lifting means

300: cooling means 400: support portion

500: bottom plate 600: fixed jig

110: insulation layer 120: heating wire

130 gas inlet hole 140 air outlet hole

301: nozzle 302: valve

310: annular tube 320: auxiliary tube

The present invention relates to a heat treatment apparatus having a cooling means, which is movable up and down, the bottom surface of which is open to accommodate the to-be-processed material therein, and an inner side of the heating furnace comprising an insulation layer and a heating wire, It is an annular tube installed around the heat treatment material, the tube is composed of a plurality of nozzles capable of adjusting the inclination angle is composed of cooling means for discharging the cooling water in the tube to the heat treated material, improving the heating efficiency and cooling efficiency In addition, by reducing the work time required for heat treatment can improve the work efficiency and reduce the cost.

Generally, heat treatment is a technique for changing or improving mechanical properties such as hardness, strength, and toughness of metal materials by appropriately controlling heating and cooling. Queries, tempering, and annealing are included in the types of heat treatment. And normalizing.

Among them, annealing is a structure in which a steel is refined by heating the steel (metal) and cooling in a furnace or after a constant temperature is maintained for a certain period of time to remove internal stresses, thereby appropriately having high toughness. Says manipulation to make.

Such heat treatment is composed of a heat treatment furnace for heating the object to be treated and cooling means for cooling the object to be treated after the heating.

In this case, a conventional heating furnace is composed of a box-type heating furnace of one side open, that is, one side open type, and operates by heating and closing the inserted heat-treated material through the open side.

Particularly, in the case of a structure having a very large size of the object to be treated, a rail may be configured on the bottom surface to be inserted into the heating furnace, and a rail support of the movable object to be orbited on the rail may be further configured.

On the other hand, the cooling target, the cooling temperature, and the uniform cooling of the workpiece to be treated are important factors for the workpiece to be treated immediately after the heating in the furnace, so that the mechanical properties of the workpiece to be determined are continuously determined according to the cooling conditions to be continuously performed.

Accordingly, in the cooling after heating in the heating furnace, in particular, when rapid cooling is required, Water Rapid Cooling is used in which an operator injects cool cooling water to the to-be-processed object using a cooling nozzle.

However, when the size of the heat treated material is large, in the case of the box-type furnace, in which only one side of the existing one is opened, the heat-treated material inside the heat treated material comes out through the rails after the heat treatment, and the speed of moving out of the heating furnace is increased. There was a problem that the longer it is gradually cooled in the air.

In addition, if the size of the to-be-processed material is large and the structure is complicated, evenness of the water to be treated is uniformly distributed at the point of cooling water injection or cooling water pressure in the process of injecting the coolant for quenching, even if the heat-treated material is quickly moved from the inside of the furnace to the outside. It was a very difficult problem to do.

On the other hand, when the cooling is not uniformly performed, the to-be-processed material is partially crossed by quenching and slow cooling, which results in that the heat-treated material is not uniformly removed from the heat-treated material after the heat treatment and the warped material is distorted. There was a serious problem.

The present invention has been proposed to solve the above problems, and includes a heating furnace using a heating wire and a cooling means integrally formed with the heating furnace for rapid heating of the heat-treatment material, whereby It is an object of the present invention to provide a heat treatment apparatus having a cooling means capable of uniform quenching to meet the heat treatment cooling conditions even in the case of a complex subject matter.

The present invention has been proposed in order to achieve the above object, the bottom surface is open so as to accommodate the to-be-processed object placed on the ground therein and has at least one gas inlet hole on one side, A heating furnace comprising a heat insulating material layer and a heating wire formed on the heat insulating material layer; Elevating means for moving the heating furnace up and down to contact or separate from the ground; The tube is installed around the enclosed to-be-processed object and consists of an annular tube through which a coolant flows, and an outer circumferential surface of the tube is provided with a plurality of nozzles capable of adjusting an inclination angle and at least one valve for controlling the flow rate of the coolant. And cooling means for discharging the cooling water therein to the object to be treated; The cooling means further comprises a plurality of auxiliary pipes which are installed vertically, each of the auxiliary pipes is provided with a plurality of nozzles and the valve for controlling the flow rate of the coolant to adjust the inclination angle; The heating furnace provides a heat treatment apparatus having a cooling means, characterized in that at least one air discharge hole is provided on the side.

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In addition, the bottom surface of the ground on which the to-be-processed object is placed, the support part of the fire-resistant material which supports the said to-be-processed material, and the bottom plate of the refractory material for covering the bottom surface of the said ground to prevent heat loss are further comprised. It provides a heat treatment apparatus having a cooling means.

In addition, when the heat treated material is a hollow structure, the heat treatment with a cooling means further comprises a fixing jig installed inside the hollow part of the heat treated material in order to prevent shrinkage and expansion of the heat treated material. Provide the device.

In addition, the outer surface of the heating furnace is composed of at least two support bodies formed with through holes, one end is fixed to the ground and the other end is inserted into the through holes of the respective supports to move up and down the heating furnace Heat treatment apparatus having a cooling means, characterized in that it further comprises a guide rod for guiding the.

The present invention relates to a heat treatment apparatus having a cooling means, and can provide a heat treatment apparatus having a cooling means capable of quenching the heated to-be-processed object after the heat treatment, thereby improving heating efficiency and cooling efficiency.

In addition, the present invention is to shorten the working time required for heat treatment to improve the work efficiency and reduce the cost. Accordingly, the present invention is largely composed of a heating furnace, a cooling means, and elevating means for moving up and down the heating furnace.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, detailed descriptions of related well-known technologies or configurations may unnecessarily obscure the subject matter of the present invention. If it is determined that the detailed description will be omitted, and if the description according to the relationship between the components of the present invention described above and the like overlap, the description thereof will be omitted.

1 is a perspective view of a heat treatment apparatus having a cooling means according to the present invention, Figures 2 and 3 shows a state diagram of use according to a preferred embodiment of the present invention. 4 is a state diagram of use according to another exemplary embodiment of the present invention, and FIG. 5 is a plan view of FIG. 4.

As shown in Figure 1, the present invention is the heating wire 120 is configured on the inner side and the heating furnace 100 that can accommodate the heat treated material 10 to the open bottom surface, and the heating furnace 100 Cooling means (300) consisting of an elevating means (200) for moving in the up and down direction, and an annular tube (310) for cooling by discharging the coolant to the heat treated object (10) after heating using the nozzle (301) It is composed of

As shown in Figure 1, the heating furnace 100 is configured such that the bottom surface is open, the shape of the box-shaped polyhedron or cylindrical shape is sufficient.

In particular, unlike the prior art, instead of moving the heat treated material 10 to accommodate the inside of the heating furnace 100, the heat treated object 10 is fixed to the ground and the heating furnace 100 It is configured to move down from the upper end of the enclosed to-be-processed object 10 to cover and receive the to-be-processed object 10.

Therefore, an additional configuration such as a rail for moving the heat-treated material 10 having a large size and a complex structure to the inside of the heating furnace 100 is not necessary. Accordingly, it is possible to quickly receive the heat-treated material 10 and thus requires work. It is possible to shorten the time.

In addition, as shown in a partially enlarged view of FIG. 1, the inner side surface of the heating furnace 100 includes a heat insulating material layer 110 and a heating wire 120 formed on the heat insulating material layer 110. In the configuration of a) it is preferable to configure a plurality of electrical wires drawn in the inner surface of the heating furnace 100 in parallel, so that faster and even heating can be made.

The heat insulation layer 110 is to prevent the heat generated inside the heating furnace 100 is transmitted to the outside of the heating furnace 100 to be lost, the material of the glass fiber is sufficient.

In addition, at least one gas inlet hole 130 is formed at the side of the heating furnace 100 to prevent surface oxidation by oxygen in the air during heating of the object to be treated 10. That is, after the heating furnace 100 is covered with the to-be-processed object 10 placed on the ground and accommodated, gas such as argon (Argon) is heated through the gas inlet hole 130 of the heating furnace 100 ( 100) to be introduced into the interior.

In particular, when gas is introduced into the heating furnace 100, the air present in the heating furnace 100 is the bottom surface of the heating furnace 100 in contact with the ground or the bottom plate 500 described later. You can get out of it.

On the other hand, for more effective gas filling is further provided with an air discharge hole 140 for discharging the internal air on the side of the heating furnace 100, through the air discharge hole 140 in the heating furnace 100 At the same time, the air may be sucked with a vacuum pump or the like, and gas such as argon may be charged through the gas inlet hole 130.

In addition, as shown in Figure 4, the outer surface of the heating furnace 100 is composed of a plurality of supports 150 having a through hole, corresponding to the support 150 and the through hole of the support 150 is inserted Guide rods 160 to be guided may be installed. The guide rod 160 corresponds to the one support 150, one end is fixed to the ground and the other end is configured to be inserted through the through holes of the respective support 150.

The support 150 and the guide rod 160 are for preventing the separation of the heating furnace 100 such as the left, right direction or rotation, etc., during the up and down movement, the heating furnace 100 The support 150 is formed on the outer surface of the guide rod 160 is configured to be guided up and down.

In particular, the number of configurations of the support 150 is preferably at least two, so that the heating furnace 100 is configured to prevent unexpected rotation during vertical movement.

Lifting means 200 is a configuration for moving the heating furnace 100 up and down, it is possible to adjust the starting speed for fast acceptance and rapid discharge of the heat-treatment object 10 into the interior of the heating furnace (100) It is preferable, and the chain may be hooked to the outer circumferential surface of the upper end of the heating furnace 100 to wind up or loosen the chain with a crane or the like.

The cooling means 300 is installed around the to-be-processed object 10 settled on the ground, etc., and consists of the annular pipe 310 which consists of the several nozzle 301 and the several valve 302 which isolate | separate a flow volume.

The annular tube 310 is configured to receive the coolant 20 such as water from the outside to be sprayed through the plurality of nozzles 301, the discharged cooling water can be adjusted to the position to be contacted with the object 10. As such, it is preferable that the nozzle 301 composed of a plurality of annular tubes 310 be configured to enable the discharge inclination angle adjustment.

This is by adjusting the inclination angle of the discharge of each nozzle 301, when the structure of the heat-treatment object 10 is complicated or the thickness is not constant, it is sprayed through the plurality of furnace lines 301 for uniform and fast cooling This is to allow to selectively adjust the amount of cooling water (20).

Furthermore, the annular pipe 310 through which the coolant 20 flows may be attached with a pressure gauge for recognizing the coolant pressure, as well as at least one valve formed in the annular pipe 310 ( As 302, it is preferable to configure the flow rate of the cooling water 20 or to adjust the pressure.

On the other hand, as shown in FIG. 5, it is preferable to stably secure the flow rate of the cooling water 20 by configuring the annular pipe 310 by configuring four cooling water supply portions a. The number of configurations of the cooling water supply unit (a) is preferably configured to correspond to the heat treated material 10 so as to receive a flow rate suitable for effectively cooling the heat treated object 10.

In addition, as shown in Figure 1, in the cooling means 300, a plurality of auxiliary pipes 320 that are installed vertically is further configured, more specifically, the vertical auxiliary branching vertically in the annular tube 310 When the structure of the heat-treatment structure is large because the pipe 320 is large, the cooling water 20 discharged when the shape is complicated is to more uniformly configure.

Preferably, the auxiliary pipes 320 also include a plurality of nozzles 301 capable of adjusting the same inclination angle as the annular pipe 310 and a valve 302 for controlling the flow rate of the cooling water.

On the other hand, the bottom of the ground on which the to-be-processed object 10 is placed, the support part 400 of the refractory material which supports the to-be-processed material 10 may be further comprised, The support part 400 is a to-be-processed material It is preferable to configure so that (10) is spaced vertically at a predetermined interval from the ground, and at the same time is responsible for more stable fixing.

In addition, the bottom plate 500 of the refractory material for covering the bottom surface of the ground to prevent heat loss may be further configured on the bottom surface of the ground on which the heat treated material 10 is placed. In the structure of the bottom plate 500, it is also possible to use the same material as the heat insulating material layer 110 of the heating furnace 10.

In addition, as shown in FIG. 1, when the heat treated material 10 is a hollow structure, since the heat treated material 10 may be greatly contracted and expanded due to heat received in the heating furnace 10. In order to prevent such a phenomenon, the fixing jig 600 may be further included in the hollow part of the heat treated material 10.

Hereinafter, referring to FIGS. 1 and 2 to 3, a simple embodiment and an application example for performing heat treatment of a heat treated material using a heat treatment apparatus having a cooling means according to the present invention will be described as follows.

As shown in FIG. 1, the heat treated material 10 to be heat-treated is placed on the ground or the bottom plate 500. In this case, the support part 400 may be further configured to place the heat treated material 10 on the support part 400 to be spaced apart from the ground by a predetermined distance.

Thereafter, as shown in FIG. 2, the heating furnace 100 positioned at the upper end of the heat treated material 10 is lowered to cover the heat treated material 10 by using the lifting means 200, and the bottom plate 500. ).

Next, argon gas is injected through the gas inlet hole 130 of the heating furnace 100, and when the argon gas is filled in an appropriate amount, electricity is introduced into the heating wire 120 of the heating furnace 100 to perform a heating process.

When the heating process is completed, the heating furnace 100 is raised by the elevating means 200 for quenching the object to be treated, and the like, by operating the cooling means 300 and spraying the cooling water to the object to be treated 10 for cooling. Let's do it. In the injection of the coolant, the inclination angles and the valves of the nozzles configured in the cooling means 300 are adjusted in advance to designate the discharge amount or the discharge points of the coolant.

4 to 5 are the same as the above-described embodiment, but in particular, the support 150 is further configured in the heating furnace 100 and the guide fixed to the ground and inserted into the support 150 Rod 160 is further configured.

This is to prevent the heating furnace 100 from deviating due to unexpected rotation or left and right movement during the up and down movement in order to cover the heat treated material 10 with the heating furnace 100.

Meanwhile, in describing an application example of the heat treatment apparatus according to the present invention, an object of the present invention is to provide a heat treatment process of a heat-treatment material in which the size of the conventional heat treatment apparatus is large or its structure is complicated and the thickness of the structure is not uniform. It is proposed to overcome the shortcomings.

Thus, as a heat treated material having the above problems, there is usually a structure such as a hot gas casing (HOT GAS CASING), an inner liner (INNER LINER) or the like as a component of a large gas turbine.

 First, since gas casing or inner liner made of high temperature heat resistant steel is complicated in structure and large in size, it is exposed to the conditions of high temperature and high pressure. Therefore, a special heat treatment such as stress relief annealing is required, 2 hours at 1100 ° C.) and rapid cooling (cooling rate of 500 ° C./min to 400 ° C.).

Thus, the heat treatment apparatus provided with the cooling means according to the present invention may be provided with a heating furnace capable of sufficiently accommodating the heat-treated material, and enables rapid heating by a heating wire.

In addition, during the cooling after heating, it is possible to cool the furnace by a lifting device, which enables rapid release of the heating furnace, thereby enabling cooling by a cooling device configured around the heat-treated material to prevent cooling due to unexpected air.

In particular, since the shape of the hot gas casing, the inner liner, etc. is very complicated and the thickness of the structural material is not constant, it is very important to maintain a uniform cooling rate and a constant cooling temperature during cooling after heating.

Therefore, since the heat treatment apparatus according to the present invention includes a plurality of nozzles for adjusting the position of the coolant discharge and valves for adjusting the coolant flow rate, the coolant may be selectively applied to a portion having a thick thickness or relatively fast cooling. It is possible to adjust the inclination angle of the nozzle and the valve to discharge a large amount.

In the above, the present invention is limited to the preferred embodiment according to the present invention, but it will be apparent to those skilled in the art that the present invention is not limited thereto and can be variously changed or modified.

The heat treatment apparatus including the cooling means according to the present invention is characterized in that the heating means and the cooling means are integrally configured, and thus there is an advantage of improving work efficiency, reducing heat treatment cost, and reducing work time.

In addition, the present invention is a large or complex structure of the object to be treated, which enables rapid heating and uniform quenching, and in particular, it is possible to control the degree of cooling of a specific part of the object to be treated, thereby providing a high heat treatment result. .

Claims (6)

delete A heating furnace having a bottom surface open and at least one gas inlet hole on one side so as to accommodate the to-be-processed object placed on the ground therein, and having an insulation layer and a heating wire formed on the insulation layer on an inner side thereof. Wow; Elevating means for moving the heating furnace up and down to contact or separate from the ground; The tube is installed around the enclosed to-be-processed object and consists of an annular tube through which a coolant flows, and an outer circumferential surface of the tube is provided with a plurality of nozzles capable of adjusting an inclination angle and at least one valve for controlling the flow rate of the coolant. And cooling means for discharging the cooling water therein to the object to be treated; The cooling means further comprises a plurality of auxiliary pipes which are installed vertically, each of the auxiliary pipes is provided with a plurality of nozzles and the valve for controlling the flow rate of the coolant to adjust the inclination angle; And at least one air outlet hole is provided at a side of the heating furnace. delete The method of claim 2, Cooling, characterized in that the bottom surface of the ground where the heat treated material is placed, the support portion of the refractory material for supporting the heat treated material and the bottom plate of the refractory material for covering the bottom surface of the ground to prevent heat loss. Heat treatment apparatus provided with a means. The method of claim 2, When the heat treated material is a hollow structure, the heat treatment apparatus having a cooling means further comprises a fixing jig installed inside the hollow portion of the heat treated material in order to prevent shrinkage and expansion of the heat treated material. The method of claim 2, The outer surface of the heating furnace consists of at least two support holes formed with a through hole, one end is fixed to the ground and the other end is inserted into the through holes of the respective support guides the up and down movement of the heating furnace Heat treatment apparatus having a cooling means, characterized in that it further comprises a guide rod.

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