JPS647140B2 - - Google Patents

Info

Publication number
JPS647140B2
JPS647140B2 JP59253868A JP25386884A JPS647140B2 JP S647140 B2 JPS647140 B2 JP S647140B2 JP 59253868 A JP59253868 A JP 59253868A JP 25386884 A JP25386884 A JP 25386884A JP S647140 B2 JPS647140 B2 JP S647140B2
Authority
JP
Japan
Prior art keywords
electrode
ingot
remelting
melting
heat treatment
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
Application number
JP59253868A
Other languages
Japanese (ja)
Other versions
JPS61133333A (en
Inventor
Toshiki Takeiri
Nobuyoshi Kurauchi
Masaaki Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Metal Corp
Original Assignee
Mitsubishi Metal Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Metal Corp filed Critical Mitsubishi Metal Corp
Priority to JP59253868A priority Critical patent/JPS61133333A/en
Publication of JPS61133333A publication Critical patent/JPS61133333A/en
Publication of JPS647140B2 publication Critical patent/JPS647140B2/ja
Granted legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Landscapes

  • Manufacture And Refinement Of Metals (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、合金製造上の二重溶解工程におい
て、真空アーク溶解炉、エレクトロスラグ溶解炉
等の再溶解炉で用いられる電極の製造方法に関す
るものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing an electrode used in a remelting furnace such as a vacuum arc melting furnace or an electroslag melting furnace in a double melting process for producing an alloy. It is something.

〔従来の技術〕[Conventional technology]

合金製造上の溶解方法としては、近年、偏析の
減少、熱間加工性の改善、非金属介在物の減少等
を目的として、二重溶解法が採用されている。こ
の二重溶解法は、まず配合された原料を真空誘導
炉、アーク炉、大気高周波誘導炉等により一次溶
解した後インゴツトを製造し、このインゴツトを
電極として真空アーク溶解炉、エレクトロスラグ
溶解炉等により再溶解して最終製品のインゴツト
を製造するものである。ところで、二重溶解法に
おいて用いられる再溶解用電極は、上記のように
一次溶解後、単に鋳造することによつて製造され
ていた。
As a melting method for manufacturing alloys, a double melting method has been adopted in recent years for the purpose of reducing segregation, improving hot workability, and reducing nonmetallic inclusions. This double melting method involves first melting the blended raw materials in a vacuum induction furnace, arc furnace, atmospheric high frequency induction furnace, etc., then manufacturing an ingot, and using this ingot as an electrode, it is used in a vacuum arc melting furnace, electroslag melting furnace, etc. The final product, ingot, is produced by remelting the ingot. By the way, the remelting electrode used in the double melting method has been manufactured by simply casting after primary melting as described above.

〔この発明が解決しようとする問題点〕 高炭素系コバルト合金(成分;炭素1%、タン
グステン4%、クロム30%、コバルト残)を鋳造
して電極とした場合には、再溶解工程において電
極の一部が脱落し、このため再溶解が不可能にな
るという問題があつた。すなわち、再溶解に用い
られる電極においては、溶解部分とそこから若干
離れた固体部分との間に多大な温度差が生じ、こ
の温度差によつてそれらの間に大きな熱応力が発
生する。この場合、電極が延性に富むものであれ
ば問題ないが、前述した高炭素系コバルト合金か
らなる電極を単に鋳造した場合には、電極の延性
が極端に小さい。このため、再溶解時の熱応力に
よつて電極に割れが発生し、その一部が脱落する
という問題が生じていたのである。
[Problems to be solved by the present invention] When an electrode is made by casting a high carbon cobalt alloy (components: 1% carbon, 4% tungsten, 30% chromium, residual cobalt), the electrode is There was a problem that part of the liquid fell off, making it impossible to redissolve it. That is, in the electrode used for remelting, a large temperature difference occurs between the melted portion and the solid portion slightly separated from the melted portion, and this temperature difference generates a large thermal stress between them. In this case, there is no problem if the electrode is highly ductile, but if the electrode is simply cast from the above-mentioned high carbon cobalt alloy, the ductility of the electrode is extremely low. For this reason, there was a problem in that the electrodes cracked due to thermal stress during remelting, and a portion of the cracks fell off.

〔問題点を解決するための手段〕[Means for solving problems]

この発明は、上記の問題点を解決する手段とし
て、配合された原料を一次溶解した後、インゴツ
トを製造し、このインゴツトを熱間鍛造した後、
歪取り熱処理を行なうようにしている。
As a means to solve the above-mentioned problems, this invention produces an ingot after first melting the blended raw materials, hot-forging the ingot, and then
Heat treatment is performed to remove distortion.

〔実施例〕〔Example〕

以下、この発明の実施例について説明する。こ
の実施例は、従来例に示した二重溶解法におい
て、一次溶解後に製造されたインゴツトに、熱間
鍛造処理と歪取り熱処理の工程を付加したもので
ある。
Examples of the present invention will be described below. In this embodiment, in the double melting method shown in the conventional example, the steps of hot forging treatment and strain relief heat treatment are added to the ingot produced after primary melting.

この発明の方法においても、まず配合された原
料を一次溶解しインゴツトを製造する点は従来例
と同様であるが、この発明の方法は、さらに次の
ような工程を有している。すなわち、まず、前記
インゴツトに熱間鍛造処理を施す。この熱間鍛造
処理は、インゴツトの鍛造組織を鍛造組織に変化
させ、インゴツトの延性を増加させることを目的
とするものである。この場合、鍛錬比としては、
合金の種類によつて決定し、例えば前述した高炭
素系コバルト合金の場合には最低1.1s程度に設定
する。
The method of the present invention is similar to the conventional method in that the blended raw materials are first melted to produce an ingot, but the method of the present invention further includes the following steps. That is, first, the ingot is subjected to hot forging treatment. The purpose of this hot forging treatment is to change the forged structure of the ingot to a forged structure and increase the ductility of the ingot. In this case, the training ratio is
The time is determined depending on the type of alloy, and for example, in the case of the above-mentioned high carbon cobalt alloy, it is set to a minimum of about 1.1 s.

次に、この熱間鍛造処理を施したものに、さら
に延性を増加させることを目的として、歪取り熱
処理を施す。この場合の熱処理温度は、合金の種
類によつて適宜決定する。例えば、前述した高炭
素系コバルト合金の場合には1000℃〜1250℃に設
定する。
Next, the hot forged product is subjected to strain relief heat treatment for the purpose of further increasing ductility. The heat treatment temperature in this case is appropriately determined depending on the type of alloy. For example, in the case of the above-mentioned high carbon cobalt alloy, the temperature is set at 1000°C to 1250°C.

以上のような工程によつて製造された再溶解用
電極は、延性が大きく、例えば前述した高炭素系
コバルト合金においては、一次溶解後のインゴツ
トの伸びは0.5%以下程度であるのに対し、熱間
鍛造および歪取り熱処理後の伸びは7%程度にな
る。このため、この再溶解用電極は、再溶解時に
電極に生ずる熱応力にも充分対応でき、したがつ
て、電極の割れやこれに伴う脱落を防止すること
ができる。
The remelting electrode manufactured by the above process has high ductility; for example, in the case of the above-mentioned high carbon cobalt alloy, the elongation of the ingot after primary melting is about 0.5% or less; The elongation after hot forging and strain relief heat treatment is approximately 7%. Therefore, this remelting electrode can sufficiently cope with the thermal stress generated in the electrode during remelting, and can therefore prevent the electrode from cracking and falling off as a result.

[実験例] 本発明の効果を確認するために、一次溶解後に
製造された高炭素系コバルト合金(成分:炭素
1.1%、タングステン4.5%、クロム31%、鉄1
%、残コバルト)のインゴツトに、1200℃の熱間
で鍛錬比1.2Sの熱間鍛造を施し、さらに1200℃下
で1時間歪取りの熱処理を施した後空冷して、そ
の伸びを測つたところ5.8%であつた。
[Experimental example] In order to confirm the effects of the present invention, a high carbon cobalt alloy (component: carbon
1.1%, tungsten 4.5%, chromium 31%, iron 1
%, residual cobalt) was hot forged at 1200℃ with a forging ratio of 1.2S, and then heat-treated at 1200℃ for 1 hour to remove distortion, then air-cooled, and its elongation was measured. However, it was 5.8%.

次に、このインゴツトを電極にして再溶解を行
なつたところ、上記電極の割れや脱落は全く発生
せず、円滑な再溶解を行なうことができた。
Next, when remelting was carried out using this ingot as an electrode, the electrode did not crack or fall off at all, and smooth remelting could be carried out.

これに対して、比較のために従来法において用
いられていた同様の成分の高炭素系コバルト合金
からなる一次溶解後に製造されたインゴツトの伸
びを測つたところ0%であつた。
On the other hand, for comparison, the elongation of an ingot manufactured after primary melting made of a high carbon cobalt alloy with similar components used in the conventional method was measured and found to be 0%.

次に、この従来法によるインゴツトをそのまま
電極として再溶解を行なつたところ、電極に割れ
が生じてその一部が脱落してしまつた。
Next, when the conventional ingot was used as an electrode for remelting, the electrode cracked and part of it fell off.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明の再溶解用電極
の製造方法によれば、配合された原料を一次溶解
した後、インゴツトを製造し、このインゴツトを
熱間鍛造した後、歪取り熱処理を行ない再溶解用
電極を製造するようにしたから、この再溶解用電
極の延性を大きくすることができ、したがつて、
再溶解時の熱応力によつて再溶解用電極に割れが
発生するのを防止することができ、これに伴う電
極の一部の脱落を防止することができるという効
果が得られる。
As explained above, according to the method for manufacturing an electrode for remelting of the present invention, an ingot is manufactured after primary melting of the blended raw materials, and this ingot is hot forged, and then subjected to heat treatment for strain relief and then remelted. Since the melting electrode is manufactured, the ductility of the remelting electrode can be increased, and therefore,
It is possible to prevent the remelting electrode from cracking due to thermal stress during remelting, and it is possible to prevent a part of the electrode from falling off due to this.

Claims (1)

【特許請求の範囲】[Claims] 1 二重溶解法を用いた合金製造において、二重
溶解工程における再溶解炉で用いられる電極の製
造方法であつて、配合された原料を一次溶解した
後、インゴツトを製造し、このインゴツトを熱間
鍛造した後、歪取り熱処理を行なうことを特徴と
する再溶解用電極の製造方法。
1. A method for producing electrodes used in a remelting furnace in the double melting process in alloy production using the double melting process, in which an ingot is produced after primary melting of the blended raw materials, and this ingot is heated. A method for producing an electrode for remelting, which comprises performing a heat treatment to remove strain after forging.
JP59253868A 1984-11-30 1984-11-30 Production of electrode for remelting Granted JPS61133333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59253868A JPS61133333A (en) 1984-11-30 1984-11-30 Production of electrode for remelting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59253868A JPS61133333A (en) 1984-11-30 1984-11-30 Production of electrode for remelting

Publications (2)

Publication Number Publication Date
JPS61133333A JPS61133333A (en) 1986-06-20
JPS647140B2 true JPS647140B2 (en) 1989-02-07

Family

ID=17257246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59253868A Granted JPS61133333A (en) 1984-11-30 1984-11-30 Production of electrode for remelting

Country Status (1)

Country Link
JP (1) JPS61133333A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200104971A (en) * 2019-02-27 2020-09-07 한국광기술원 Photoacoustic Simulus Apparatus for Oral Cavity
US10835355B2 (en) 2006-04-20 2020-11-17 Sonendo, Inc. Apparatus and methods for treating root canals of teeth
US11103333B2 (en) 2012-12-20 2021-08-31 Sonendo, Inc. Apparatus and methods for cleaning teeth and root canals
US11284978B2 (en) 2012-04-13 2022-03-29 Sonendo, Inc. Apparatus and methods for cleaning teeth and gingival pockets

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03277751A (en) * 1990-03-27 1991-12-09 Mitsubishi Materials Corp Production of electrode for remelting
JP3606404B2 (en) * 1996-03-08 2005-01-05 日立金属株式会社 Consumable electrode type remelting method of super heat-resistant alloy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10835355B2 (en) 2006-04-20 2020-11-17 Sonendo, Inc. Apparatus and methods for treating root canals of teeth
US11284978B2 (en) 2012-04-13 2022-03-29 Sonendo, Inc. Apparatus and methods for cleaning teeth and gingival pockets
US11103333B2 (en) 2012-12-20 2021-08-31 Sonendo, Inc. Apparatus and methods for cleaning teeth and root canals
KR20200104971A (en) * 2019-02-27 2020-09-07 한국광기술원 Photoacoustic Simulus Apparatus for Oral Cavity

Also Published As

Publication number Publication date
JPS61133333A (en) 1986-06-20

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