JPS6151005B2 - - Google Patents
Info
- Publication number
- JPS6151005B2 JPS6151005B2 JP59078997A JP7899784A JPS6151005B2 JP S6151005 B2 JPS6151005 B2 JP S6151005B2 JP 59078997 A JP59078997 A JP 59078997A JP 7899784 A JP7899784 A JP 7899784A JP S6151005 B2 JPS6151005 B2 JP S6151005B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- hardened
- induction
- hardening
- cooling water
- 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
- 230000006698 induction Effects 0.000 claims description 47
- 238000001816 cooling Methods 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 24
- 239000000498 cooling water Substances 0.000 claims description 22
- 238000010791 quenching Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 6
- 238000007796 conventional method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- 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 Treatments In General, Especially Conveying And Cooling (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、高周波焼入部材の冷却方法に関し、
詳しくは、高周波焼入における誘導加熱後の焼入
冷却過程において、冷却水噴射量を２段階に変化
させることにより、高周波焼入部材の高周波焼入
品質を確保するとともに、焼入冷却時間を短縮す
ることのできる高周波焼入部材の冷却方法にかか
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for cooling an induction hardened member.
Specifically, in the quenching cooling process after induction heating during induction hardening, by changing the amount of cooling water jetted in two stages, the quality of induction hardening of the induction hardened parts is ensured, and the quenching cooling time is shortened. The present invention relates to a method for cooling an induction hardened member.
（従来技術）
高周波焼入とは、加熱源として被焼入部材内に
誘導された高周波電流のジユール熱を利用して表
面焼入硬化する方法で、被焼入部位に適合した形
状の高周波焼入コイルを作成し、高周波発生装置
からの高周波大電流を通電することにより近接す
る被焼入部材表層部に対しその表皮作用による誘
導電流を発生し、表面層から急速に加熱して、焼
入温度に到達したら電流を切つて冷却液（水）を
噴射して焼入する表面硬化方法である。(Prior art) Induction hardening is a method of surface quenching and hardening using the Joule heat of high-frequency current induced in the part to be hardened as a heating source. By creating a coil and passing a high-frequency large current from a high-frequency generator, an induced current is generated due to the skin action on the nearby surface layer of the workpiece to be hardened, rapidly heating the surface layer and hardening it. This is a surface hardening method in which the current is cut off and a cooling liquid (water) is injected for hardening once the temperature has been reached.
このように、高周波焼入は誘導加熱にて加熱さ
れた被焼入部材を直ちに冷却して焼入する方法で
あることから、高周波焼入において冷却過程は高
周波焼入部材の高周波焼入品質を確保する上で非
常に重要な工程であり、冷却水流量等の冷却条件
が高周波焼入品質に大きな影響をおよぼしてい
る。 In this way, induction hardening is a method of immediately cooling and hardening the part to be hardened that has been heated by induction heating, so the cooling process in induction hardening improves the induction hardening quality of the induction hardened part. This is a very important process in ensuring the quality of induction hardening, and cooling conditions such as the flow rate of cooling water have a large impact on the quality of induction hardening.
ところで、高周波焼入工程において、従来の誘
導加熱後の冷却方法では一定の冷却水量を一定時
間、即ち、被焼入部材における焼入部位の温度が
焼入温度から室温となるまで冷却水を噴射するの
が通常であつた。 By the way, in the induction hardening process, in the conventional cooling method after induction heating, a fixed amount of cooling water is injected for a fixed period of time, that is, until the temperature of the hardened part of the part to be hardened drops from the hardening temperature to room temperature. It was normal to do so.
しかし、高周波焼入におけるこのような従来の
冷却方法においては、たとえば、長物被焼入部材
の高周波移動焼入等においては、高周波移動焼入
の最終段階での停止冷却段階で15秒程度の時間冷
却水を噴射していなければ被焼入部材全体を室温
まで冷却することができず、高周波焼入部材の優
れた高周波焼入品質を安定的に確保することが困
難であるという間題点があつた。 However, in such conventional cooling methods in induction hardening, for example, in induction hardening of long parts to be hardened, the stop cooling stage at the final stage of induction hardening takes about 15 seconds. If cooling water is not injected, the entire part to be hardened cannot be cooled to room temperature, making it difficult to stably ensure the excellent induction hardening quality of induction hardened parts. It was hot.
（発明の目的）
本発明は、高周波焼入における冷却過程におい
て、冷却水量を２段階変化させることにより、安
定した高周波焼入品質を確保するとともに、被焼
入部材の焼入冷却を短時間とすることのできる高
周波焼入部材の冷却方法をを提供することを目的
としている。(Objective of the Invention) The present invention secures stable induction hardening quality by changing the amount of cooling water in two stages in the cooling process of induction hardening, and shortens the quench cooling of the workpiece to be hardened. The object of the present invention is to provide a method for cooling an induction hardened member.
（発明の構成）
このような目的は、本発明によれば、高周波焼
入における被焼入部材を焼入硬化するための高周
波焼入部材の冷却方法であつて、高周波焼入にお
ける焼入硬化のための冷却水噴射を２段階噴射と
し、第１段階の冷却水噴射により被焼入部材の表
面温度を900〜950℃の焼入温度から室温まで冷却
して表面焼入した後、第１段階の冷却水噴射に加
えて第２段階の冷却水噴射を追加することによつ
て、被焼入部材内部の残熱を速やかに放熱させる
ことを特徴とする高周波焼入部材の冷却方法によ
つて達成される。(Structure of the Invention) According to the present invention, an object of the present invention is to provide a cooling method for an induction hardened member for quench hardening a member to be hardened in induction hardening. The cooling water injection for the first stage is a two-stage injection. A method for cooling an induction hardened member is characterized in that residual heat inside the member to be hardened is quickly radiated by adding a second stage cooling water jet to the first stage cooling water jet. will be achieved.
（実施例）
第１図は、本発明法による長物被焼入部材を矢
印Ｍ方法に高周波移動焼入して、その最終段階で
ある停止冷却状態を示す説明図である。(Example) FIG. 1 is an explanatory diagram showing a stopped cooling state which is the final stage of induction hardening of a long workpiece to be hardened according to the method of the present invention in the direction of arrow M.
本発明による高周波移動焼入において、まず、
環状をなした高周波焼入コイル３の中央部に高周
波移動焼入する被焼入部材１を保持し、前記高周
波焼入コイル３に高周波大電流を通電することに
より、被焼入部材１の表面焼入部位２を主体に誘
導加熱する。 In the induction hardening according to the present invention, first,
The workpiece 1 to be hardened is held in the center of an annular induction hardening coil 3, and the surface of the workpiece 1 is heated by applying a high frequency large current to the induction hardening coil 3. The quenched area 2 is mainly subjected to induction heating.
そして、被焼入部材１の表面焼入部位２が所定
の焼入温度（900〜950℃）に誘導加熱された後、
まず、第１の冷却水路５より適正冷却水量を噴射
して被焼入部材１の表面焼入部位２が室温となる
まで冷却する。 Then, after the surface hardening part 2 of the member to be hardened 1 is induction heated to a predetermined hardening temperature (900 to 950°C),
First, an appropriate amount of cooling water is injected from the first cooling water channel 5 to cool the surface hardened portion 2 of the member to be hardened 1 to room temperature.
ついで、第１の冷却水路５からの冷却水噴射に
加えて第２の冷却水路６から冷却水量及び冷却水
圧を増加させて冷却水を噴射させることにより、
被焼入部材１内部の残熱を速やかに放熱させて被
焼入部材１内部から表面への回復熱を防止して、
高周波焼入部材の安定した高周波焼入品質を確保
するとともに焼入冷却時間を短時間とすることが
できるるものである。 Next, in addition to the cooling water jetted from the first cooling waterway 5, cooling water is jetted from the second cooling waterway 6 by increasing the amount and pressure of the cooling water.
Residual heat inside the member to be quenched 1 is quickly dissipated to prevent recovery heat from returning from the inside of the member to be quenched to the surface,
It is possible to ensure stable induction hardening quality of the induction hardened member and to shorten the quenching cooling time.
第２図は、第１図で説明した高周波移動焼入に
おける、被焼入部材１の従来方法および本発明法
による高周波移動焼入の最終段階での停止冷却状
態時の、被焼入部材１表面と被焼入部材１内部の
冷却曲線を比較して示している。 FIG. 2 shows the workpiece 1 to be hardened in the stopped cooling state at the final stage of the conventional method and the method of the present invention in the induction hardening explained in FIG. The cooling curves of the surface and the inside of the member to be hardened 1 are shown in comparison.
この図から明らかなように、被焼入部材１表面
は本発明法においても従来法と同様に、被焼入部
材１表面冷却曲線７に沿つて室温まで冷却され
る。 As is clear from this figure, the surface of the member to be quenched is cooled to room temperature along the surface cooling curve 7 of the member to be quenched in the method of the present invention as well as in the conventional method.
そして、被焼入部材１表面の温度が室温まで冷
却された後は、従来の冷却方法においてはその後
も冷却水量を変化させないことから、従来法によ
る被焼入部材１中心部冷却曲線８に沿つて除々に
冷却されるのに対し、本発明の冷却方法によれ
ば、被焼入部材１の表面温度が室温となるまで冷
却された後第２の冷却水路からの冷却水噴射が開
始されることから、本発明法による被焼入部材中
心部冷却曲線９に沿つて被焼入部材１内部温度が
速やかに冷却され、短時間で被焼入部材１が冷却
されていることが理解される。 After the temperature of the surface of the part to be quenched 1 has been cooled to room temperature, the amount of cooling water is not changed in the conventional cooling method. In contrast, according to the cooling method of the present invention, the cooling water injection from the second cooling channel is started after the surface temperature of the hardened member 1 has been cooled to room temperature. From this, it is understood that the internal temperature of the part to be quenched 1 is rapidly cooled along the cooling curve 9 of the central part of the part to be quenched by the method of the present invention, and the part to be quenched 1 is cooled in a short time. .
上述により明らかなように、本発明の高周波焼
入部材の冷却方法によれば、被焼入部材１の表面
冷却曲線７が従来法におけるそれと同様であるこ
とから、高周波焼入部材の高周波焼入品質は従来
法と同等以上の優れたものとすることができると
ともに、冷却時間は従来法に比較して著しく短縮
することができることが理解される。 As is clear from the above, according to the method for cooling an induction hardened member of the present invention, the surface cooling curve 7 of the member to be hardened 1 is similar to that in the conventional method. It is understood that the quality can be made as good as or better than the conventional method, and the cooling time can be significantly shortened compared to the conventional method.
（発明の作用効果）
以上により明らかなように、本発明にかかる高
周波焼入部材の冷却方法によれば、高周波焼入に
おける冷却過程において、冷却水量を２段階に変
化させることにより、焼割れを発生することもな
く高周波焼入部材の安定した高周波焼入品質を確
保することができるとともに、被焼入部材の焼入
冷却を短時間とすることのできる利点がある。(Operations and Effects of the Invention) As is clear from the above, according to the method for cooling an induction hardened member according to the present invention, quench cracking can be prevented by changing the amount of cooling water in two stages in the cooling process during induction hardening. This method has the advantage that stable induction hardening quality of the induction hardened member can be ensured without occurrence of the occurrence of such occurrence, and that the hardening cooling of the member to be hardened can be shortened.
第１図は、本発明法による高周波移動焼入にお
ける最終段階での停止冷却状態を示す説明図、第
２図は、本発明法および従来法における被焼入部
材表面と被焼入部材中心部の冷却曲線を示す図で
ある。
１……被焼入部材、２……表面焼入部位、３…
…高周波焼入コイル、４……冷却ジヤケツト、５
……第１の冷却水路、６……第２の冷却水路、７
……被焼入部材表面冷却曲線、８……従来法によ
る被焼入部材中心部冷却曲線、９……本発明法に
よる被焼入部材中心部冷却曲線、ａ……第１の冷
却水路からの冷却水噴射時期、ｂ……第１の冷却
水路および第２の冷却水路からともに冷却水を噴
射する時期、Ｍ……高周波移動焼入方向。
Fig. 1 is an explanatory diagram showing the stopped cooling state in the final stage of induction hardening by the method of the present invention, and Fig. 2 shows the surface and center of the workpiece to be hardened in the method of the present invention and the conventional method. It is a figure showing the cooling curve of. 1... Part to be quenched, 2... Surface quenched portion, 3...
...Induction hardening coil, 4...Cooling jacket, 5
...First cooling waterway, 6...Second cooling waterway, 7
... Surface cooling curve of the member to be quenched, 8... Cooling curve of the center part of the member to be quenched by the conventional method, 9... Cooling curve of the center part of the member to be quenched by the method of the present invention, a... From the first cooling channel cooling water injection timing, b...timing when cooling water is injected from both the first cooling channel and the second cooling channel, M...high frequency movement quenching direction.
Claims (1)
るための高周波焼入部材の冷却方法であつて、高
周波焼入における焼入硬化のための冷却水噴射を
２段階噴射とし、第１段階の冷却水噴射により被
焼入部材の表面温度を900〜950℃の焼入温度から
室温まで冷却して表面焼入した後、第１段階の冷
却水噴射に加えて第２段階の冷却水噴射を追加す
ることによつて、被焼入部材内部の残熱を速やか
に放熱させることを特徴とする高周波焼入部材の
冷却方法。1 A cooling method for an induction hardened member for quench hardening a member to be hardened in induction hardening, the cooling water injection for quench hardening in induction hardening is a two-stage injection, and the first stage After the surface temperature of the part to be hardened is cooled from the quenching temperature of 900 to 950℃ to room temperature by cooling water injection and surface hardening is performed, a second stage of cooling water injection is applied in addition to the first stage of cooling water jetting. A method for cooling an induction hardened member, characterized in that residual heat inside the member to be hardened is quickly dissipated by adding additional heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59078997A JPS60224714A (en) | 1984-04-19 | 1984-04-19 | Method for cooling member to be induction-hardened |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59078997A JPS60224714A (en) | 1984-04-19 | 1984-04-19 | Method for cooling member to be induction-hardened |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60224714A JPS60224714A (en) | 1985-11-09 |
| JPS6151005B2 true JPS6151005B2 (en) | 1986-11-07 |
Family
ID=13677529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59078997A Granted JPS60224714A (en) | 1984-04-19 | 1984-04-19 | Method for cooling member to be induction-hardened |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60224714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0611509U (en) * | 1992-07-15 | 1994-02-15 | 亨 小野 | Work shoes |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03240914A (en) * | 1990-02-16 | 1991-10-28 | Fuji Denshi Kogyo Kk | Method and device for high-frequency hardening |
| CN108779507A (en) * | 2016-03-23 | 2018-11-09 | 株式会社Ihi | Cooling device and annealing device |
-
1984
- 1984-04-19 JP JP59078997A patent/JPS60224714A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0611509U (en) * | 1992-07-15 | 1994-02-15 | 亨 小野 | Work shoes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60224714A (en) | 1985-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6151005B2 (en) | ||
| CN109652622A (en) | Steel plate member and the method for producing steel plate member | |
| JPH09296214A (en) | Solid forming austemper processing method and apparatus | |
| US2623836A (en) | Method of surface hardening of metal articles | |
| JPS58213828A (en) | Induction hardening method of inside surface of bottomed cylindrical body | |
| JPS60116724A (en) | Hardening method of circumferential surface | |
| JPS5839729A (en) | Partial tempering method for carburized and hardened parts | |
| GB2026044A (en) | Heat treating butt welded tubular products | |
| JPS58213823A (en) | Induction hardening method | |
| JPS6059015A (en) | Cooler for high frequency induction hardening | |
| JPH0819469B2 (en) | Heat treatment method for cylindrical wear resistant parts | |
| JP2000328141A (en) | Heat treatment method to manufacture long product or flat product of alloy-free or low-alloy steel with hardened surface layer | |
| RU2104845C1 (en) | Method of electric surface welding | |
| JP2709556B2 (en) | Induction quenching method for thin ring-shaped workpiece | |
| JPS635455B2 (en) | ||
| JPS59136422A (en) | Preparation of rod steel and wire material having spheroidal structure | |
| Tensi et al. | Specific Features of Using Intensive Methods of Quenching for the Strengthening Parts of Complex Configuration | |
| JPH0235010B2 (en) | GOKINKOKIJOTANTOBUNONETSUSHORIHOHO | |
| JPS6311615A (en) | High-frequency hardening method | |
| JPS59190317A (en) | High frequency hardening method | |
| JPH05140635A (en) | Induction hardening method | |
| JPS58147515A (en) | Induction hardening method of casting parts | |
| JPS61261423A (en) | Surface hardening method for end part of cylindrical member by high frequency hardening | |
| JPS6343443B2 (en) | ||
| SU1296610A1 (en) | Method for heat treatment of spring wire made from carbon and low-alloyed steels |