KR101615324B1 - Carburizing and anti-carburizing and heat treatment method using the same means of preventing metal parts - Google Patents

Carburizing and anti-carburizing and heat treatment method using the same means of preventing metal parts Download PDF

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KR101615324B1
KR101615324B1 KR1020150095650A KR20150095650A KR101615324B1 KR 101615324 B1 KR101615324 B1 KR 101615324B1 KR 1020150095650 A KR1020150095650 A KR 1020150095650A KR 20150095650 A KR20150095650 A KR 20150095650A KR 101615324 B1 KR101615324 B1 KR 101615324B1
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South Korea
Prior art keywords
nitriding
carburizing
preventing
airtight
metal part
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KR1020150095650A
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Korean (ko)
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박인석
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장인열처리(주)
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/04—Treatment of selected surface areas, e.g. using masks
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding
    • C23C8/32—Carbo-nitriding of ferrous surfaces

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

The present invention relates to a means for preventing carburizing and nitriding of a metal part and a method for preventing carburizing and nitriding using the same. (100); An anti-carnitine nitriding coating is applied to the inside of the cylindrical member 100, and a carburizing and nitriding coating painted to a certain thickness is applied to the surface of the metal part joined to the cylindrical member 100 to form a sealing A layer 200; (100) formed with a sealing layer (200) and an outer circumferential edge portion which is open to the inside of the cylindrical member (100) And an airtight cap member (300) hermetically coupled to the sealing layer (200) so that the carburizing and nitriding coating material is not directly applied to the carburizing or nitriding preventing portion, As the sealing layer is formed, the use of the carbo-nitridation preventing paint is more economical, and the economic advantage through reuse is reduced, the maintenance cost is reduced, the washing process for applying the carbo-nitriding preventing paint can be reduced, The drying time of the anti-nitriding paint can be minimized, resulting in shortening of the production time, production efficiency and production cost reduction, and the carbo- Heat treatment of metal parts that can improve product quality by preventing product defects due to bad product due to defective product and coating flow due to coating on the surface of parts that do not require paper, And a method of preventing carburizing and nitriding using the same.

Description

Technical Field [0001] The present invention relates to a carburizing and anti-carburizing and heat treatment method using the same,

The present invention relates to a heat treatment carburizing and nitriding preventing means for a metal part and a carburizing and nitriding preventing method using the same. More particularly, the present invention relates to a carburizing- For preventing the carburization or nitriding of the carburizing or non-nitriding parts for the workability of the metal during the carburizing or nitriding process through the use of the heat treatment, carburizing and nitriding preventing means of the metal parts for improving the economical efficiency, To a method for preventing carburizing and nitriding.

Metals are the basic material for the industries that are used by mankind since the Bronze Age. Metals, which may have been used by mankind during the Bronze Age rather than the Bronze Age, have already attempted to alter the properties of metals through various heat treatments since the advent of metals, there was.

As humankind begins to deal with metals, culture develops rapidly and various metals are being developed from industrial revolution to modern times. At present, it is widely used for parts and tools for various equipments and equipments, and these metals are developed to have various durability and properties according to each field.

As a representative example of changing the properties of metals, there is a commonly used heat treatment method. Carburizing heat treatment method, carburizing nitriding method, and composite nitriding heat treatment-oxynitriding-softening heat treatment are currently used in the heat treatment method. First, the carburizing heat treatment method is a heat treatment method which usually permeates carbon to the surface of low carbon steel. The carburizing heat treatment method is generally widely used, and carbon is infiltrated using propane, LNG, benzene or the like. Then, the temperature is raised, and the temperature and time are adjusted at 850 to 930 ° C to adjust the cured layer and deformation amount. Thereafter, the temperature is lowered to 800 to 860 ° C for about 30 minutes, By selecting between oil, gas and salt bath and cooling, surface hardness and core hardness are obtained.

Secondly, the carbo-nitriding method is a method of penetrating carbon and nitrogen on the surface of the product through treatment with ammonia in addition to propane, LNG and benzene. In such a carburizing and nitriding process, the temperature is continuously raised to adjust the temperature and time according to the cured layer and the deformation amount in the range of 800 to 900 ° C., and the temperature according to the deformation of the core hardness is set at 700 to 850 ° C., Gas, or bath. Here, the control of the deep portion hardness is the same as the above-described carburizing heat treatment method.

Third, the nitriding heat treatment has a method of pure nitriding, softening, and oxynitriding, and the oxynitriding is a surface oxidation treatment after softening. The nitrification treatment is a method of infiltrating nitrogen on the product surface. In this method, the temperature is raised and the nitriding time is set according to the hardened layer in the range of 550 to 600 to nitrify. Thereafter, when the softening is completed, the holding time is maintained according to the surface oxide layer in the interval of 450 to 550 while cooling, and then the cooling is gradually performed.

Such a typical heat treatment method is widely used at present, but a metal having such a heat treatment has a high hardness, resulting in a problem of poor machinability. A method of preventing carburization or nitrification in the above-mentioned heat treatment method in consideration of machinability is disclosed. Preventing carburization or nitriding is usually for carburizing or nitriding rather than full carburizing or nitriding of the mechanical parts for various mechanical properties and machining of the metal parts.

A method for preventing carburization or nitriding for carburizing or nitriding is disclosed in a brief description of a carburizing and nitriding preventing method for local carburization or nitriding.

In such a carburization-nitriding method, a part for heat treatment is prepared, and a carbo-nitridation-preventing coating is applied so that gas does not come into contact with a part of the surface of the prepared part where carburization or nitrification is unnecessary. At this time, the carburizing and nitriding coating material is applied to the whole surface to be carburized or nitrided in a state of having a proper thickness (most of the copper plating is used and the thickness of the copper plating is usually about 20 μm). At this time, in order to apply the carburizing and nitriding paint, if the foreign matter exists on the surface of the prepared parts, the carburizing or nitrification prevention is not performed properly, so the cleaning work must be performed in parallel. That is, since the surface of the parts is clean, the carburizing and nitriding coating can be properly applied, thereby preventing carburization or nitrification. After that, the desired parts are produced through the heat treatment for carburizing or nitriding. Therefore, due to the increase in the number of steps of the cleaning operation, the production time of the parts through local carburization or nitriding is increased, which causes a problem that productivity is largely lowered.

Further, in the conventional method of preventing carburizing and nitriding by a carburizing-nitriding paint, it is necessary to wait until the carburizing-nitriding-preventing coating completely adheres to the surface of a part to be prevented from carburizing or nitriding, thereby increasing the working time. In addition, there is a problem in that the amount of the carburizing-nitriding-preventing paint is large and the economical restriction due to the use of a large amount of the expensive carburizing-nitriding-preventing paint is accompanied by the application of an expensive carburizing-nitriding-preventing paint on the whole surface to prevent carburizing or nitriding.

Furthermore, as described above, the carburizing and anti-nitriding coating is frequently applied to the portion where the carburizing or anti-nitriding should not be performed during the application of the carburizing-nitriding coating, as described above. There is a problem of causing defects.

Therefore, such a carbo-nitrification preventing paint can be used at a minimum and reuse is possible, so that only a portion having a more economical advantage and a desired carburization preventing or nitrification preventing portion can be minimized, And the time for preventing carburization or nitrification can be shortened without adding any additional process or time such as the time for attaching the carburizing and anti-nitriding paints. Thus, there is a desperate need for a technique that can improve the productivity and reduce the production cost.

1) Korean Patent Publication No. 10-2014-0087384, published on July 09, 2014.

Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a carburizing and nitriding coating composition which is economical, minimizes the economic advantage through reuse, It is possible to minimize the drying time of the carburizing and anti-nitriding paints, thereby reducing the production time and reducing the production efficiency and production cost. And the like.

Further, the present invention prevents the product deterioration due to the problem of the product deterioration caused by the coating of the carburizing and anti-nitriding paint on the surface of the heat-treated component which does not require carburization or nitrification prevention and the flow of the paint, Another object of the present invention is to provide a heat treatment carburizing and nitriding preventing means for a metal part capable of being produced and capable of improving the product quality and a carburizing and nitriding preventing method using the same.

In order to accomplish the above object, according to the present invention, there is provided a carburizing and nitriding preventing means for preventing local carburization or nitriding of a heat-treated metal part, A base milling member 100 formed to have a shape corresponding to a boundary portion between a portion for preventing nitriding and a portion for a carburizing or nitriding heat treatment; An anti-carnitine nitriding coating is applied to the inside of the cylindrical member 100, and a carburizing and nitriding coating painted to a certain thickness is applied to the surface of the metal part joined to the cylindrical member 100 to form a sealing A layer 200; (100) formed with a sealing layer (200) and an outer circumferential edge portion which is open to the inside of the cylindrical member (100) And an airtight cap member (300) hermetically coupled to the sealing layer (200) in contact therewith.

The sealing member 200 is formed of the carburizing member 100 by the carburizing agent 100 and the sealing member 300 is fitted into the sealing member 100 where the sealing layer 200 is formed A fitting hole (110) formed in a shape corresponding to a boundary portion between a portion for preventing the carburization or nitriding of the metal part and a portion for the carburizing or nitriding heat treatment; Wherein the airtight cap member is formed so as to communicate with the upper side of the fitting hole directly below the upper surface of the cylindrical member to allow the airtight cap member to be inserted thereinto, And an airtight hole 120 in which the airtight cap member 300 is hermetically coupled to the airtight hole 120 by forming an installation step 122 on which the airtight cap 120 is placed.

Meanwhile, it is preferable that the recess 122 is formed in an inclined surface such that one end of the airtight cap member 300 is in contact with the airtight cap. Further, a guide curved portion 130 for guiding the fitting of the metal part to one side of the lower portion of the fitting hole 110 and adjusting the cylindrical member 100 to be spaced from the surface of the metal component when the fitting is released is further formed desirable.

The sealing layer 200 may be formed on the peripheral edge of the airtight inner cavity 120 and the inner edge of the recess 120 and the inner edge of the airtight hole 110, And a predetermined thickness of the carbo-nitridation preventing paint is applied in a range of 15 탆 to 400 탆 and is applied to the inner surface of the fitting hole (110) And a sealing layer (200) is formed on the member (100).

Further, the airtight cap member 300 is formed of a hollow body having one side opened to enclose the carburization or nitrification preventing portion of the metal part, and the airtight cap 310 is attached to the outer periphery of the airtight cap member 300 And may be formed to be in close contact with the upper surface of the cylindrical member 100.

The method for preventing carburizing and nitriding using the heat treatment carburizing and nitriding preventing means of the present invention comprises the steps of forming an airtight cap member 300 formed of a hollow enclosure having one side opened to surround a portion for preventing carburization or nitrification of a metal part And the airtight cap member (300) is provided with a fitting hole (110) having a shape corresponding to a boundary portion between a portion for preventing carburization or nitriding of the metal part and a portion for carburizing or nitriding heat treatment, And an air vent 122 is formed in communication with the upper end of the fitting hole 110 and has one end of the airtight cap member on the upper side outside the fitting hole 110 so that the airtight cap member 300 is air- A carburizing and nitriding preventing means preparation step (S100) comprising a cylinder milling member (100) having a cavity (120) formed therein; The coating or nitriding member 100 is formed on the peripheral edge of the airtight inner cavity 120 of the cylindrical member 100 prepared in the carburizing and nitriding preventing means preparation stage and the peripheral edge of the inner peripheral edge of the recess 120, An anti-nitriding coating is applied to the periphery of the airtight built-up hole 120 and the periphery of the interior step 122 and the insert hole 110 from a top surface to a thickness of 15 to 400 μm to form a sealing layer 200 (S200) of forming a sealing layer; The sealing member 200 is formed with the seal layer forming step and the fitting hole 110 of the base member 100 is fitted with the carburization or anti-nitrification part of the metal part, (S300) of joining a portion for preventing carburization to a boundary portion of a portion for carburizing or nitriding heat treatment; The airtight sealing member (300) is inserted into the hollow so as to enclose a portion for preventing carburization or nitriding of the metal part and to be hermetically sealed, A carburizing and nitriding hermetic sealing completion step (S400) in which one end of the hollow open end of the airtight cap member (300) is hermetically sealed in the air hole (122) forming the sealing layer (200); The carburizing and nitriding preventing means for preventing the carburization or nitriding of the metal part is completed and the metal parts to which the carburizing and nitriding preventing means is bonded are heat treated so that the portion to which the carburizing and nitriding preventing means is bonded is a metal And a finishing step (S500) of fabricating the part.

The present invention is characterized in that the carburizing or non-nitriding portion is hermetically sealed by a cylinder-joining member which is fitted to a carburizing or nitrification-preventing portion and an airtight cap member which is hermetically fitted to the cylinder- The carburizing and anti-nitriding coating is applied to the milling member to seal the gas penetration for carburizing or nitriding through the airtightness when joining the airtightening member and the airtight cap member, thereby forming a sealing layer to prevent carburization or nitriding, It is possible to minimize the use of the carburizing and anti-nitriding paints as the anti-corrosive paints are indirectly applied to the carburizing or non-carburizing parts to form the sealing layer, It is possible to reduce the washing process for applying the carburizing-nitriding paint, The attachment can be minimized drying time is effective to bring the production time and production efficiency and lower production costs.

Further, the present invention prevents the product deterioration due to the problem of the product deterioration caused by the coating of the carburizing and anti-nitriding paint on the surface of the heat-treated component which does not require carburization or nitrification prevention and the flow of the paint, It is possible to produce and improve the quality of the product.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an overall perspective view of a heat treatment carburizing and nitriding preventing means of a metal part according to the present invention; FIG.
2 is an exploded perspective view of a heat treatment carburizing and nitriding preventing means of a metal part according to the present invention.
3 is a side cross-sectional view of a cylindrical member of a heat treatment carburizing and nitriding preventing means of a metal part according to the present invention.
4 is a side sectional view of the airtight cap member of the heat treatment carburization and nitridation preventing means of the metal part according to the present invention.
5 is a side sectional view in the use state of the heat treatment carburization and nitridation preventing means of the metal part according to the present invention.
6 is a perspective view showing another embodiment of the airtight cap member of the heat treatment carburization and nitridation preventing means of the metal part according to the present invention.
7 is a side sectional view showing another embodiment of the airtight cap member of the heat treatment carburization and nitridation preventing means of the metal part according to the present invention.
8 is a block diagram of a method for preventing carburizing and nitriding using the heat treatment carburizing nitriding preventing means of a metal part according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention and to fully disclose the scope of the invention to a person having ordinary skill in the art to which the present invention belongs. And the present invention is only defined by the scope of the claims. Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

Like reference numerals refer to like elements throughout the specification. And, the terms used (hereafter) used herein are intended to illustrate the embodiments and are not intended to limit the invention in any way. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. Also, components and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other components and operations.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

FIG. 1 is an overall perspective view of a heat treatment carburizing and nitriding preventing means of a metal part according to the present invention, FIG. 2 is an exploded perspective view of a heat treatment carburizing and nitriding preventing means of a metal part according to the present invention, 4 is a side cross-sectional view of the airtight cap member of the heat treatment carburizing and nitriding preventing means of the metal part according to the present invention, and Fig. 5 is a cross-sectional view of the airtight cap member of the heat treatment carburizing and nitriding means of the heat- 6 is a perspective view showing another embodiment of the airtight cap member of the heat treatment carburizing and nitriding preventing means of the metal part according to the present invention, and Fig. 7 is a cross- FIG. 8 is a side sectional view showing another embodiment of the airtight cap member of the carburizing and nitriding preventing means, and FIG. 8 is a cross- Is a block diagram of ways.

The heat treatment carburizing and nitriding preventing means of the metal part according to the present invention more efficiently carries out carburizing or nitriding for local carburization or local nitriding of metal parts and reduces the use amount of the carburizing nitriding paint, It is possible to minimize the economic loss, and it is possible to use repeatedly, and also it is not necessary to carry out a cleaning process such as cleaning of the surface of metal parts for preventing carburization or nitrification, thereby shortening the carburizing or nitrification- 1 and 2, the carburizing and nitriding preventing means according to the present invention includes a cylindrical member 100, a sealing layer 200, an airtight cap member 100, (300).

The cylindrical member 100 is formed in a shape corresponding to a boundary portion between a portion for preventing carburization or nitriding of a metal part and a portion for a carburizing or nitriding heat treatment and hermetically coupled to the carburizing or nitriding portion Contacted to the sealing layer described later so as to prevent gas penetration due to the heat treatment from the carburizing or nitriding portion to which the cylindrical sealing member 100 is not bonded to the carburizing or nitriding preventing portion It is bonded to the surface of metal parts. Here, as shown in FIGS. 2 and 3, the cylindrical milling member 100 is formed of a fitting hole 110 and an airtight hole 120.

The fitting hole 110 is formed in a shape corresponding to the boundary between the portion for preventing the carburization or nitriding of the metal part and the portion for the carburizing or nitriding heat treatment, An anti-nitrifying coating is applied to form a sealing layer to be described later and to be hermetically sealed with the metal part.

A guide curved portion 130 for guiding the fitting of the metal part to one side of the lower portion of the fitting hole 110 and adjusting the cylindrical member 100 to be spaced from the surface of the metal component when the fitting is released is shown in Fig. It may be formed as shown. The guide curved portion 130 is formed in a shape in which the lower portion of the fitting hole 110 is formed to be extended. The guide curved portion 130 can be easily guided by the fitting hole 110 when fitting the metal part, Thereby guiding the metal part to be accurately engaged with the fitting hole 110. [ Also, when releasing the coupling of the cylinder member 100 from the metal part, the airtight coupling of the metal part from the fitting hole 110 is easily released while adjusting the distance of the metal part to the guide curved part 130 side.

2, 3, and 5, the airtight public water hole 120 is formed in the upper surface of the cylindrical member 100 so that the airtight cap member 300, which will be described later, Is formed in communication with the upper side of the fitting hole (110). An air vent 122 is formed on the outer side of the fitting hole 110 to surround the open end of the airtight cap member. The airtight cap member 300 is wrapped by the airtight cap member 300, Thereby preventing gas inflow.

Here, as shown in FIGS. 3 and 5, it is preferable that the recess 122 is formed so that one end of the airtight cap member 300, which will be described later, is in contact with the airtight cap for hermetic sealing. That is, as the leveling step forms the inclined surface, it is possible to prevent the formation of the spacing space which may occur due to the inaccurate leveling of the one end of the airtight cap member 300, which will be described later, have.

2, 3, and 5, the sealing layer 200 is formed by applying a carbo-nitridation-preventing coating to the inside of the mirror-polishing member 100 and coating the carburizing- And is formed in close contact with the surface of the metal part to be coupled to the cylindrical milling member 100 to maintain airtightness. That is, since the sealing layer 200 is applied to a certain thickness, it functions as an O-ring or a gasket that maintains airtightness between the airtight cap member 300 and the cylinder-forming member 100, which will be described later.

5, the sealing layer 200 may be applied to the periphery of the airtight place hole 120 and the periphery of the placement step 122 and the insertion hole 110, As shown in FIG. 7, is applied from the upper surface of the cylindrical member 100 to the periphery of the airtight interior cavity 120 and the interior of the interior cavity 122 and the interior of the insertion hole 110.

The predetermined thickness of the carbo-nitridation preventing paint is preferably 15 to 400 탆. That is, when the carbo-nitrification preventive paint is applied to a thickness of 15 μm or less, it is difficult to perform a sealing function, so that when the horizontalness of one end of the airtight cap member is not maintained, it is difficult to maintain airtightness due to the generation of pores. When the anti-nitrification coating is applied, the inner periphery can be formed to be narrower than the outer circumferential size of the hermetic cap member and the metal part to be fitted to the fitting hole 110, so that the hermetic sealing of the metal part and the hermetic cap member is easy And the cost due to the use of a large amount of the carbo-nitriding coating can be increased, which is not economical.

1, 2, and 4, the hermetic cap member 300 is formed of a hollow enclosure whose one side is opened so as to surround a portion for preventing carburization or nitrification of the metal part, And the outer edge of one side opened to the inside of the base milling member 100 having the layer 200 formed thereon is hermetically sealed while being in contact with the sealing layer 200.

6 and 7, the airtight cap 310 is further formed on the outer periphery of the airtight cap member 300 so as to be in close contact with the upper surface of the cylindrical member 100, Wherein one end of the airtight cap member 300 is first airtightly coupled to the air vent 122 of the airtight cap 100 and the outer periphery of the airtight cap member 300 on the side of the air conditioner step 120 And is hermetically sealed on the lower surface of the air-tightness frame 310 by the air-tightness frame 310 so that the air-tightness of the air- Through the air tightness across the car, complete gas shutoff is possible during heat treatment of metal parts, preventing carburization or nitrification.

As shown in the block diagram of FIG. 8 through the heat treatment carburizing and nitriding preventing means of the metal part according to the present invention, the method for preventing carburization or nitriding of the metal part comprises steps S100, The local carburization of the metal parts is possible through the sealing layer forming step S200, the base joining joining step S300, the airtight joining completion step S400, and the closing step S500.

In the carburizing and nitriding preventing means preparing step (S100)

A fitting hole 110 having a shape corresponding to a boundary portion between a portion for preventing carburization or nitriding of the metal part and a portion for a carburizing or nitriding heat treatment and a fitting hole 110 for fitting the airtight cap member 300, And an opening step 122 in which an open end of the airtight cap member is placed on the upper side outside the fitting hole 110 is formed in the upper part of the member 100, (100) having an airtight security hole (120) in which an airtight cap member (300) is hermetically and hermetically engaged, and a hermetic seal And a cap member (300).

Here, the air-tightening member and the airtight cap member 300 may be formed in various shapes. That is, it is preferable to be formed so as to correspond to the shape of the portion to be prevented from carburizing or nitriding.

The sealing layer forming step (S200)

The coating or nitriding member (100) is provided on the peripheral edge of the airtight inner cavity (120) of the cylindrical member (100) prepared in the carburizing and nitriding preventing means preparation stage and in the inner edge of the recess An anti-nitriding coating is applied to the periphery of the airtight built-up hole 120 and the periphery of the interior step 122 and the insert hole 110 from a top surface thereof to a thickness of 15 μm to 400 μm to form a sealing layer 200 are formed.

In the base mill joining step (S300)

The sealing member 200 is formed with the seal layer forming step and the fitting hole 110 of the base member 100 is fitted with the carburization or anti-nitrification part of the metal part, To the boundary portion between the portion for preventing carburization or nitriding and the portion for the carburizing or nitriding heat treatment.

In the hermetic sealing completion step S400,

The airtight sealing member (300) is inserted into the hollow so as to enclose a portion for preventing carburization or nitriding of the metal part and to be hermetically sealed, And one end of the hollow open end of the airtight cap member 300 is hermetically sealed and air-tightly joined to the seat 122 formed with the sealing layer 200.

Here, when bonding the cylinder member 100 and the hermetic cap member 300 to a metal part to be carburized or nitrided, a surface cleaning process is required to apply the carburization-nitriding paint. However, It is possible to prevent the carburization or nitrification of the metal parts without requiring a surface cleaning process, thereby remarkably shortening the working time, improving the productivity and improving the quality of the product.

In the finishing step S500,

The carburizing and nitriding preventing means for preventing the carburization or nitriding of the metal part is completed and the metal parts to which the carburizing and nitriding preventing means is bonded are heat treated so that the portion to which the carburizing and nitriding preventing means is bonded is a metal It is manufactured and produced by parts.

It is obvious that the carburizing and nitriding preventing method using the carburizing and nitriding preventing means can produce the local carburizing or the locally nitrided products of the metal parts and it is obvious that the carburizing and nitriding preventing means which can be continuously reused can prevent the expensive carburizing- It is economical to use a small amount. In other words, since the carburizing-nitriding-preventing coating is used only for forming the sealing layer 200, the amount of the carburizing-nitriding-preventing coating in the method of applying the carburizing- It is possible to minimize the cost incurred in the purchase of the expensive carbo-nitriding preventive paint, thereby reducing the production cost.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Various changes and modifications may be made by those skilled in the art, The present invention is not limited thereto.

100: base milling member 110:
120: Confidential space ball 122:
130: guide curved portion 200: sealing layer
300: airtight cap member 310: airtight cap
S100: Preparing carburizing and nitriding preventing means S200: Step of forming a sealing layer
S300: Combination of pre-milling Step S400:
S500: Finishing step

Claims (7)

A carburizing and nitriding preventing means for preventing local carburization or nitrification of a heat-treated metal part,
The carburizing and nitriding preventing means includes a base milling member 100 which is formed in a shape corresponding to a boundary portion between a portion for preventing carburization or nitriding of a metal part and a portion for a carburizing or nitriding heat treatment,
An anti-carnitine nitriding coating is applied to the inside of the cylindrical member 100, and a carburizing and nitriding coating painted to a certain thickness is applied to the surface of the metal part joined to the cylindrical member 100 to form a sealing A layer 200;
(100) formed with a sealing layer (200) and an outer circumferential edge portion which is open to the inside of the cylindrical member (100) And an airtight cap member (300) hermetically coupled to the sealing layer (200) while contacting the sealing layer (200).
The method according to claim 1,
The sealing member 200 is formed by the carburizing member 100 and the airtight cap member 300 is fitted to the sealing member 100 having the sealing layer 200 and the airtight seal As being coupled,
A fitting hole 110 formed in a shape corresponding to a boundary portion between a portion for preventing the carburization or nitriding of the metal part and a portion for the carburizing or nitriding heat treatment;
Wherein the airtight cap member is formed so as to communicate with the upper side of the fitting hole directly below the upper surface of the cylindrical member to allow the airtight cap member to be inserted thereinto, And an airtight hole 120 in which the airtight cap member 300 is hermetically coupled to the airtight cap 120 by being formed with an installation step 122 on which the airtight cap 120 is placed.
3. The method of claim 2,
Wherein the ventilation step (122) is formed in an inclined surface such that one end of the airtight cap member (300) is contacted for airtightness maintenance.
3. The method of claim 2,
A guide curved portion 130 for guiding the fitting of the metal part to one side of the lower portion of the fitting hole 110 and adjusting the cylindrical member 100 to be spaced from the surface of the metal component when the fitting is released, Heat treatment, carburizing and nitriding of metal parts.
3. The method of claim 2,
The sealing layer 200 is formed on the periphery of the airtight safety hole 120 and on the edge of the air hole 120 and the edge 120 of the airbag 110, 120), and is applied to the recess 122 and the periphery of the fitting hole 110,
Characterized in that the carburizing and nitriding coating is applied with a thickness of 15 to 400 탆 to form a sealing layer (200) on the base milling member (100).
The method according to claim 1,
The airtight cap member 300 is formed of a hollow body having one side opened to surround the carburization or non-nitride portion of the metal part,
Wherein the airtight cap (310) is further formed on the outer periphery of the airtight cap member (300) to be in intimate contact with the upper surface of the cylindrical member (100).
In the carburizing and nitriding preventing method,
And an airtight cap member (300) formed of a hollow enclosure whose one side is opened so as to surround a portion for preventing carburization or nitrification of the metal component. The airtight cap member includes a portion for preventing carburization or nitriding of the metal component, And the airtight cap member 300 is formed to communicate with the upper end of the fitting hole 110 so that the airtight cap member 300 is inserted into the fitting hole 110. The fitting hole 110 is formed on the upper side of the fitting hole 110 The carburizing and nitriding preventing means preparation step includes a cylindrical milling member (100) having an air hole (120) in which an air vent hole (120) in which an airtight cap member (300) (S100);
The coating or nitriding member 100 is formed on the peripheral edge of the airtight inner cavity 120 of the cylindrical member 100 prepared in the carburizing and nitriding preventing means preparation stage and the peripheral edge of the inner peripheral edge of the recess 120, An anti-nitriding coating is applied to the periphery of the airtight built-up hole 120 and the periphery of the interior step 122 and the insert hole 110 from a top surface to a thickness of 15 to 400 μm to form a sealing layer 200 (S200) of forming a sealing layer;
The sealing member 200 is formed with the seal layer forming step and the fitting hole 110 of the base member 100 is fitted with the carburization or anti-nitrification part of the metal part, (S300) of joining a portion for preventing carburization to a boundary portion of a portion for carburizing or nitriding heat treatment;
The airtight sealing member (300) is inserted into the hollow so as to enclose a portion for preventing carburization or nitriding of the metal part and to be hermetically sealed, A carburizing and nitriding hermetic sealing completion step (S400) in which one end of the hollow open end of the airtight cap member (300) is hermetically sealed in the air hole (122) forming the sealing layer (200);
The carburizing and nitriding preventing means for preventing the carburization or nitriding of the metal part is completed and the metal parts to which the carburizing and nitriding preventing means is bonded are heat treated so that the portion to which the carburizing and nitriding preventing means is bonded is a metal And a finishing step (S500) of fabricating the metal part. The method for preventing carburizing and nitriding using the same.
KR1020150095650A 2015-07-06 2015-07-06 Carburizing and anti-carburizing and heat treatment method using the same means of preventing metal parts KR101615324B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101926657B1 (en) 2017-10-19 2018-12-11 박준일 Carburizing and anti-carburizing and heat treatment method using the same means of preventing metal parts

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046765A (en) * 2007-08-16 2009-03-05 Sulzer Metco Ag Method for manufacture of functional layer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009046765A (en) * 2007-08-16 2009-03-05 Sulzer Metco Ag Method for manufacture of functional layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101926657B1 (en) 2017-10-19 2018-12-11 박준일 Carburizing and anti-carburizing and heat treatment method using the same means of preventing metal parts

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