JPH0442466B2 - - Google Patents
Info
- Publication number
- JPH0442466B2 JPH0442466B2 JP2183083A JP2183083A JPH0442466B2 JP H0442466 B2 JPH0442466 B2 JP H0442466B2 JP 2183083 A JP2183083 A JP 2183083A JP 2183083 A JP2183083 A JP 2183083A JP H0442466 B2 JPH0442466 B2 JP H0442466B2
- Authority
- JP
- Japan
- Prior art keywords
- steel
- carburizing
- chilled
- layer
- chilling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005255 carburizing Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 10
- 229910001018 Cast iron Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000968 Chilled casting Inorganic materials 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- 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
- C23C8/80—After-treatment
Landscapes
- 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)
Description
【発明の詳細な説明】
本発明は、鋼の表面チル化処理方法、さらに詳
しくは、鋼表面にチル層を形成させる表面処理技
術に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for surface chilling treatment of steel, and more particularly to a surface treatment technique for forming a chill layer on a steel surface.
従来、鋳鉄鋳物においては、砂型造型された製
品キヤビテイの一部に冷し金を配置して、鋳鉄を
鋳込むことによつて、冷し金と接した部分をチル
化する処理は、一般的に行われている。 Conventionally, in cast iron castings, a common process was to place a cooling metal in a part of the sand-molded product cavity and chill the part that came into contact with the cooling metal by casting cast iron. is being carried out.
このチル化処理とは、鋳造時、冷し金に接触し
て急冷凝固された部分を、セメンタイト（Fe3
C4）の多い、硬くて耐摩耗性に優れた白銑組織
とすることをいう。 This chilling process refers to the part that is rapidly solidified in contact with the chilled metal during casting, and is treated with cementite (Fe 3
This refers to a white pig iron structure that is hard and has excellent wear resistance, with a large amount of C 4 ).
なお、上記のチル鋳物製造時、冷し金のない部
分及びチル層の内部は、黒鉛の析出した通常の鋳
鉄組織を呈している。 In addition, during the production of the above-mentioned chilled casting, the portion without the chilled metal and the inside of the chilled layer exhibit a normal cast iron structure in which graphite is precipitated.
チル化した鋳鉄は、鋼の表面硬化したもの、例
えば、JISSCr20浸炭焼入材などに比べて、硬さ、
耐摩耗性に優れているものの、鋳鉄の強度は鋼の
それに比べて、著しく劣るばかりでなく脆いこと
から、強度部材としては使用できない欠点があ
る。 Chilled cast iron has higher hardness and hardness than surface hardened steel such as JISSCr20 carburized and quenched material.
Although it has excellent wear resistance, cast iron has the disadvantage that it cannot be used as a strength member because its strength is significantly inferior to that of steel and it is also brittle.
また、鋳鉄はその製造方法からくる制約から、
薄肉化が難しく、部品の軽量化が困難であるとい
う欠点がある。 In addition, due to the limitations of cast iron due to its manufacturing method,
It has the disadvantage that it is difficult to reduce the thickness and weight of parts.
さらに、チル化した鋳鉄は硬いため、機械加工
が困難であるという欠点がある。 Additionally, chilled cast iron is hard and difficult to machine.
本発明は、塑性加工や機械加工などの金属加工
した鋼部品において、耐摩耗性の必要な部位のみ
を、高周波誘導加熱によつて、高炭素濃度の高温
浸炭を行い、ついで、表面のみを溶融後、急冷す
ることにより、鋼部品の表面にチル層を形成させ
る鋼の表面チル化処理方法を提供することを目的
とする。 The present invention uses high-frequency induction heating to perform high-temperature carburizing with a high carbon concentration on only the parts that require wear resistance in metal-processed steel parts such as plastic working or machining, and then melts only the surface. It is an object of the present invention to provide a method for surface chilling treatment of steel, which forms a chill layer on the surface of a steel component by rapidly cooling the steel component.
このような目的は、本発明によれば、鋼部品表
面の任意の部位を、浸炭性ガスで包囲し、あるい
は、浸炭剤を塗布した後、高周波誘導加熱によ
り、高温かつ表面を高炭素濃度とする浸炭処理を
行い、ついで表面のみを溶融させた後、急冷する
ことを特徴とする鋼の表面チル化処理方法によつ
て達成される。 According to the present invention, after surrounding any part of the surface of a steel component with a carburizing gas or applying a carburizing agent, the surface is heated to a high temperature and has a high carbon concentration by high-frequency induction heating. This is achieved by a method for surface chilling treatment of steel, which is characterized by carrying out carburizing treatment, then melting only the surface, and then rapidly cooling.
以下添付図面に基づいて、本発明の実施例を説
明する。 Embodiments of the present invention will be described below based on the accompanying drawings.
第１図は本発明法にかかる鋼のチル化処理装置
の一実施例を示す。 FIG. 1 shows an embodiment of a steel chilling treatment apparatus according to the method of the present invention.
炉体１は、浸炭性ガスの供給口５及び排出口６
を有する密閉構造となつており、表面チル化処理
にあたつて、まず、被処理物４を炉体１内の保持
治具３にセツトした後、浸炭性ガス供給口５から
浸炭性ガスを供給する。 The furnace body 1 has a carburizing gas supply port 5 and a discharge port 6.
In surface chilling treatment, the workpiece 4 is first set in the holding jig 3 in the furnace body 1, and then carburizing gas is supplied from the carburizing gas supply port 5. supply
一方、高周波加熱コイル２には、高周波発振機
７から高周波電流を流し、所定の温度（1000〜
1250℃）と時間（３〜10分）で浸炭処理を行つた
後、その温度から50〜100℃程度温度を上昇させ、
表面のみを溶融後、急冷して表面をチル化するも
のである。 On the other hand, a high-frequency current is passed through the high-frequency heating coil 2 from the high-frequency oscillator 7 to a predetermined temperature (1000~
1250℃) and time (3 to 10 minutes), then raise the temperature by about 50 to 100℃ from that temperature,
After melting only the surface, it is rapidly cooled to chill the surface.
なお、反応後の浸炭性ガスは排出口６から排出
される。 Note that the carburizing gas after the reaction is discharged from the discharge port 6.
この実施例においては、出力；5KW、周波
数；150KHzの高周波発振機を用い、φ20mm×50
mmのJISS15材試験片にて、浸炭処理条件を、プ
レート電圧；2.0KV、プレート電流；0.8A、浸炭
温度；1150℃、浸炭時間；５分、浸炭性ガス；
N2−C3H8混合比10％とし、チル化処理条件を、
プレート電圧；2.2KV、プレート電流；1.0A、チ
ル化加熱温度；1250℃、チル化加熱時間；１分、
雰囲気；N2−C3H8混合比10％として処理を行つ
た。 In this example, a high frequency oscillator with an output of 5KW and a frequency of 150KHz is used, and a φ20mm x 50
The carburizing treatment conditions were as follows: plate voltage: 2.0 KV, plate current: 0.8 A, carburizing temperature: 1150°C, carburizing time: 5 minutes, carburizing gas;
The N 2 − C 3 H 8 mixing ratio was 10%, and the chilling treatment conditions were as follows:
Plate voltage: 2.2KV, plate current: 1.0A, chilling heating temperature: 1250℃, chilling heating time: 1 minute,
Atmosphere: Processing was carried out at a N 2 -C 3 H 8 mixing ratio of 10%.
上記により、鋼の表面チル化処理すると、被処
理物４には第２図に示すような、チル層８及び浸
炭層９からなる二重硬化層が形成される。 As described above, when the surface of steel is subjected to the surface chilling treatment, a double hardened layer consisting of a chilled layer 8 and a carburized layer 9 is formed on the workpiece 4 as shown in FIG.
この二重硬化層は、高周波加熱コイルの設計方
法と浸炭処理ならびに表面チル化処理条件によつ
て、その分布状態を調節することが可能であり、
高周波加熱コイルの巻数を多くし、均一温度・均
一雰囲気で表面チル化処理すれば、第２図ａのよ
うに、被処理物４表面の全面に均一に表面チル化
処理ができ、また、高周波加熱コイル巻数を２巻
きとして処理すれば、第２図ｂのように部分的に
表面チル化処理ができる。 The distribution state of this double hardened layer can be adjusted by the design method of the high frequency heating coil and the carburizing treatment and surface chilling treatment conditions.
If the number of turns of the high-frequency heating coil is increased and the surface chilling treatment is performed at a uniform temperature and in a uniform atmosphere, the surface chilling treatment can be uniformly applied to the entire surface of the workpiece 4, as shown in Figure 2a, and the high-frequency If the number of turns of the heating coil is two, the surface can be partially chilled as shown in FIG. 2b.
以上により明らかなように、本発明法によれ
ば、塑性加工や機械加工などの金属加工した鋼部
品において、耐摩耗性の必要な部位のみに、チル
化した表面層を形成できることから、鋼部品であ
ることによる高強度かつ軽量部品化、及び被処理
部位を除いては機械加工性を損なうことなく、必
要部位に鋳鉄のチル層に匹敵する耐摩耗性を得る
ことができる利点がある。 As is clear from the above, according to the method of the present invention, a chilled surface layer can be formed only in areas where wear resistance is required in steel parts that have undergone metal processing such as plastic working or machining. This has the advantage of producing high-strength, lightweight parts, and providing wear resistance comparable to a chilled layer of cast iron in the required areas without impairing machinability except for the treated areas.
第１図は本発明法にかかる鋼の表面チル化処理
装置の断面図、第２図は本発明法により表面チル
化処理品の断面図で、ａは被処理物表面全面に均
一処理したもの、ｂは部分的に処理したものであ
る。
１……炉体、２……高周波加熱コイル、３……
試料保持治具、４……被処理物、５……浸炭性ガ
ス供給口、６……浸炭性ガス排出口、７……高周
波発振機、８……表面チル層、９……浸炭層。
Fig. 1 is a cross-sectional view of a steel surface chilling treatment apparatus according to the method of the present invention, and Fig. 2 is a cross-sectional view of a product subjected to surface chilling treatment using the method of the present invention. , b are partially processed. 1...Furnace body, 2...High frequency heating coil, 3...
Sample holding jig, 4... Workpiece, 5... Carburizing gas supply port, 6... Carburizing gas discharge port, 7... High frequency oscillator, 8... Surface chill layer, 9... Carburizing layer.
Claims (1)
囲し、あるいは、浸炭剤を塗布した後、高周波誘
導加熱により、高温かつ表面を高炭素濃度とする
浸炭処理を行い、ついで表面のみを溶融させた
後、急冷することを特徴とする鋼の表面チル化処
理方法。1 After surrounding any part of the surface of the steel part with a carburizing gas or applying a carburizing agent, carburizing the surface at high temperature and with a high carbon concentration using high-frequency induction heating, then melting only the surface. A method for surface chilling treatment of steel, which comprises cooling the surface of the steel rapidly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2183083A JPS59150082A (en) | 1983-02-11 | 1983-02-11 | Treatment for surface chilling of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2183083A JPS59150082A (en) | 1983-02-11 | 1983-02-11 | Treatment for surface chilling of steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59150082A JPS59150082A (en) | 1984-08-28 |
| JPH0442466B2 true JPH0442466B2 (en) | 1992-07-13 |
Family
ID=12065982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2183083A Granted JPS59150082A (en) | 1983-02-11 | 1983-02-11 | Treatment for surface chilling of steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59150082A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4537522B2 (en) * | 2000-02-07 | 2010-09-01 | 中外炉工業株式会社 | Intermittently driven vacuum carburizing furnace |
| JP4903993B2 (en) * | 2004-10-27 | 2012-03-28 | 光洋サーモシステム株式会社 | Partial carburizing method for steel parts |
| US10774413B2 (en) * | 2015-11-11 | 2020-09-15 | Honeywell International Inc. | Low pressure induction carburization |
-
1983
- 1983-02-11 JP JP2183083A patent/JPS59150082A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59150082A (en) | 1984-08-28 |
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