JPH0235010B2 - GOKINKOKIJOTANTOBUNONETSUSHORIHOHO - Google Patents
GOKINKOKIJOTANTOBUNONETSUSHORIHOHOInfo
- Publication number
- JPH0235010B2 JPH0235010B2 JP5256986A JP5256986A JPH0235010B2 JP H0235010 B2 JPH0235010 B2 JP H0235010B2 JP 5256986 A JP5256986 A JP 5256986A JP 5256986 A JP5256986 A JP 5256986A JP H0235010 B2 JPH0235010 B2 JP H0235010B2
- Authority
- JP
- Japan
- Prior art keywords
- rail
- cooling
- heating device
- heat
- cooling device
- 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 - Lifetime
Links
- 238000001816 cooling Methods 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 27
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 description 3
- 229910001563 bainite Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は合金鋼軌条の端頭部を熱処理する方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for heat treating the end head of an alloy steel rail.
合金鋼軌条（例えば、炭素0.75〜0.79％、マン
ガン0.65〜1.40％、クロム0.53〜0.68％含有）は
耐摩耗性、耐損傷性及び溶接性に優れているが、
その熱処理方法は極めて難かしいとされており、
従来は、加熱後の冷却に際しては、１個のエアノ
ズルを用いて軌条の端頭部は勿論、該軌条の端部
まで冷却していた。
Alloy steel rails (for example, containing 0.75-0.79% carbon, 0.65-1.40% manganese, and 0.53-0.68% chromium) have excellent wear resistance, damage resistance, and weldability, but
The heat treatment method is said to be extremely difficult.
Conventionally, when cooling after heating, one air nozzle was used to cool not only the end head of the rail but also the end of the rail.
然し乍ら、合金鋼軌条は焼入性がよいので、そ
の熱処理に際しては、通常の軌条のそれより冷却
速度を遅くして冷却する必要がある。その理由
は、通常の焼入方法では軌条端部の冷却速度が速
過ぎて、該端部にベーナイトが生じ易いからであ
り、端部にベーナイトが生じないような、該端部
に適合した冷却速度で冷却すると、定常部の硬度
が規定値に達しないという問題点があり、また、
軌条端部に直接冷却剤をかけると、該端部に異常
組織や硬度異常等が生じるという問題点もあるの
である。
However, since alloy steel rails have good hardenability, when heat treating them, it is necessary to cool them at a slower cooling rate than that of ordinary rails. The reason for this is that in the normal hardening method, the cooling rate at the end of the rail is too fast and bainite is likely to form at the end. When cooling at a high speed, there is a problem that the hardness of the stationary part does not reach the specified value, and
There is also the problem that if a coolant is applied directly to the end of the rail, an abnormal structure or abnormal hardness will occur at the end.
本発明は上述のような従来技術の問題点を解決
し、合金鋼軌条の端頭部を良好に熱処理すること
の出来る方法を提供することを目的としてなされ
たもので、その構成は、合金鋼軌条の端頭部を熱
処理するに際し、加熱装置の後に２連のエアノズ
ルから成る冷却装置を配し、前記加熱装置を軌条
の端頭部上適宜の箇所から移動させながら該軌条
頭部を加熱した後、前記冷却装置により冷却する
ようにし、加熱装置が軌条端部を通過したら、前
記冷却装置をその先端部が軌条端部と揃つたとこ
ろで停止し、保持冷却を行なうことを特徴とする
ものである。
The present invention has been made for the purpose of solving the above-mentioned problems of the prior art and providing a method that can satisfactorily heat treat the end head of an alloy steel rail. When heat-treating the end head of the rail, a cooling device consisting of two air nozzles was arranged after the heating device, and the heating device was moved from an appropriate location on the end head of the rail to heat the rail head. After that, the heating device is cooled by the cooling device, and when the heating device passes the rail end, the cooling device is stopped when the tip of the heating device is aligned with the rail end to perform holding cooling. be.
即ち、本発明は、合金鋼軌条の端頭部を熱処理
するに際して、従来は加熱装置の後にエアによる
冷却装置を１個配して、それら加熱装置と冷却装
置とを、軌条端頭部上を移動させて熱処理してい
たものを、加熱装置の後にエアによる冷却装置を
２連配してそれら加熱装置と冷却装置を前記と同
様に移動させて熱処理するのであるが、加熱装置
が軌条端部を通過し、冷却装置の先端部が軌条端
部と一線に揃つたところで冷却装置の移動を停止
し、そのままの状態で保持冷却を行なうことによ
り、軌条端部にベーナイトを生じさせることなく
定常部の硬度が規定値に達するように熱処理する
のである。
That is, when heat treating the end head of alloy steel rail, the present invention conventionally places one air cooling device after the heating device, and connects the heating device and the cooling device to the top of the rail end head. The material that was previously heat-treated by moving is now heat-treated by placing two air cooling devices in succession after the heating device, and then moving the heating device and cooling device in the same manner as described above. The movement of the cooling device is stopped when the tip of the cooling device is aligned with the rail end, and the cooling device is maintained and cooled in that state. By doing so, the stationary section is maintained without creating bainite at the rail end. The material is heat treated so that its hardness reaches a specified value.
次に本発明の実施の一例を図に拠り説明する。 Next, an example of implementation of the present invention will be explained with reference to the drawings.
１は合金鋼から成る軌条、１ａはその頭部、１
ｂは同じく端部、Ｈは高周波誘導子から成る鞍型
の加熱装置、Ｑは２連のエアノズルＱ１，Ｑ２か
ら成る冷却装置で、軌条１の熱処理に際しては、
加熱装置Ｈを該軌条１頭部の熱処理開始位置に配
置させると共に冷却装置Ｑをその後に配置させ、
該位置から軌条１の端部１ｂに向け、前記加熱装
置Ｈと冷却装置Ｑを移動させながら、加熱装置Ｈ
により軌条頭部１ａを加熱すると共に加熱部分を
冷却装置Ｑにより冷却することにより徐々に熱処
理して行くのであるが、加熱装置Ｈが軌条端部１
ｂを通過して冷却装置Ｑの前方のエアノズルＱ１
の先端部が軌条端部１ｂと一線に揃つたところ
で、冷却装置Ｑの移動を停止し、そのままの状態
で所定の時間保持冷却を行なうのである。 1 is a rail made of alloy steel, 1a is its head, 1
b is the same end, H is a saddle-shaped heating device made of a high-frequency inductor, Q is a cooling device consisting of two air nozzles Q1 and Q2, and when heat-treating the rail 1,
A heating device H is arranged at the heat treatment start position of the head of the rail 1, and a cooling device Q is arranged afterwards,
While moving the heating device H and the cooling device Q from this position toward the end 1b of the rail 1,
The heating device H gradually heats the rail head 1a and cools the heated portion with the cooling device Q.
Air nozzle Q1 in front of cooling device Q after passing through
When the tip of the cooling device Q is aligned with the rail end 1b, the movement of the cooling device Q is stopped and cooling is performed for a predetermined period of time in that state.
尚、上記実施例においては、加熱装置Ｈに高周
波誘導子を用い、冷却装置Ｑにエアノズルを用い
たが、本発明はそれらに限られることなく、他の
適宜のものを用いてもよい。 In the above embodiment, a high frequency inductor was used for the heating device H, and an air nozzle was used for the cooling device Q, but the present invention is not limited to these, and other suitable devices may be used.
実際に、炭素0.72％、マンガン1.20％を含有す
る合金鋼から成る合金鋼軌条を、上記の方法で下
記の条件により熱処理した。 Actually, an alloy steel rail made of alloy steel containing 0.72% carbon and 1.20% manganese was heat-treated by the above method under the following conditions.
加熱温度 1181℃
移動速度 1.7mm／sec
冷却速度 1.2℃／sec
保持冷却時間 60sec
この結果、熱処理された軌条の端部にはベーナ
イトが生じなかつたし、また、定常部の硬度は規
定値に達しており、更に、軌条端部に異常組織や
硬度異常も生じなかつた。Heating temperature: 1181℃ Moving speed: 1.7mm/sec Cooling rate: 1.2℃/sec Holding cooling time: 60sec As a result, no bainite was formed at the end of the heat-treated rail, and the hardness of the stationary section reached the specified value. Furthermore, no abnormal structure or hardness abnormality occurred at the end of the rail.
尚、上記における測温位置は深さ５mm、軌条端
面からの距離50mmで、測温手段はCA熱電対を用
いた。 The temperature measurement position in the above was 5 mm deep and 50 mm from the rail end surface, and a CA thermocouple was used as the temperature measurement means.
本発明は上述の通りであるから、合金鋼軌条端
部の熱処理方法として好適である。
Since the present invention is as described above, it is suitable as a method for heat treatment of alloy steel rail ends.
図は本発明方法の実施の一例を示すもので、第
１図は熱処理を開始する状態の側面図、第２図は
加熱装置が軌条端部を通過した後、保持冷却を行
なつている状態の側面図である。
１……合金鋼軌条、１ａ……軌条頭部、１ｂ…
…軌条端部、Ｈ……加熱装置、Ｑ……冷却装置、
Ｑ１，Ｑ２……エアノズル。
The figures show an example of the implementation of the method of the present invention. Figure 1 is a side view of the state in which heat treatment is started, and Figure 2 is a state in which the heating device is holding and cooling after passing the end of the rail. FIG. 1...Alloy steel rail, 1a...Rail head, 1b...
...Rail end, H...Heating device, Q...Cooling device,
Q1, Q2...Air nozzle.
Claims (1)
熱装置の後に２連のエアノズルから成る冷却装置
を配し、前記加熱装置を軌条の端頭部上適宜の箇
所から移動させながら該軌条頭部を加熱した後、
前記冷却装置により冷却するようにし、加熱装置
が軌条端部を通過したら、前記冷却をその先端部
が軌条端部と揃つたところで停止し、保持冷却を
行なうことを特徴とする合金鋼軌条端頭部の熱処
理方法。1. When heat-treating the end head of an alloy steel rail, a cooling device consisting of two air nozzles is placed after the heating device, and the heating device is moved from an appropriate location on the end head of the rail. After heating the
An alloy steel rail end head characterized in that cooling is performed by the cooling device, and when the heating device passes the rail end, the cooling is stopped when the tip end is aligned with the rail end to perform holding cooling. Heat treatment method for parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5256986A JPH0235010B2 (en) | 1986-03-12 | 1986-03-12 | GOKINKOKIJOTANTOBUNONETSUSHORIHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5256986A JPH0235010B2 (en) | 1986-03-12 | 1986-03-12 | GOKINKOKIJOTANTOBUNONETSUSHORIHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62211324A JPS62211324A (en) | 1987-09-17 |
| JPH0235010B2 true JPH0235010B2 (en) | 1990-08-08 |
Family
ID=12918435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5256986A Expired - Lifetime JPH0235010B2 (en) | 1986-03-12 | 1986-03-12 | GOKINKOKIJOTANTOBUNONETSUSHORIHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0235010B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468428B (en) * | 2018-12-17 | 2020-10-27 | 包头钢铁（集团）有限责任公司 | Method for controlling phosphorus content in high-strength and high-toughness heavy rail steel by converter |
-
1986
- 1986-03-12 JP JP5256986A patent/JPH0235010B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62211324A (en) | 1987-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0235010B2 (en) | GOKINKOKIJOTANTOBUNONETSUSHORIHOHO | |
| US2224998A (en) | Heat conditioned steel and method of conditioning | |
| JP2001510509A (en) | Method of hardening a camshaft and linear inductor for performing the method | |
| JPH01246323A (en) | Device for holding rail in heat treatment apparatus for rail | |
| JPH03274221A (en) | Method and apparatus for high-frequency shifting quenching and tempering | |
| JP2006028589A (en) | Quenching and tempering method using direct current quenching equipment | |
| CN105803161A (en) | Steel heat treatment method | |
| JPS5839729A (en) | Partial tempering method for carburized and hardened parts | |
| SU474564A1 (en) | The method of thermomechanical processing of welded joints of low-alloy steel | |
| JPS6030726B2 (en) | Rail head heat treatment method and device | |
| JPS6117886B2 (en) | ||
| JPS6289818A (en) | Rail heat treatment method | |
| JPS5576025A (en) | Structure improving heat treatment method of welding heat affected zone of low alloy steel | |
| JPH03281078A (en) | Method for welding high carbon steels | |
| JPS6151005B2 (en) | ||
| Tensi et al. | Specific Features of Using Intensive Methods of Quenching for the Strengthening Parts of Complex Configuration | |
| Anzawa et al. | Method for Cooling Rolled Steels | |
| JPS6153404B2 (en) | ||
| KR100588494B1 (en) | Heat treatment device and system with steel bar feeder | |
| JPS62161917A (en) | Manufacture of head end-heattreated rail excellent in resistance to damage and wear | |
| JPH02200734A (en) | Heat treatment for rail | |
| SU837982A1 (en) | Method of thermal treatment of full-rolled railroad wheels | |
| Nesterov et al. | Process of Heat Treatment of Rails With Increased Hardness at the Ends | |
| SU726191A1 (en) | Method of thermal processing of bimetallic rods | |
| JP4557240B2 (en) | Induction hardening method and gear |