JPS6012201A - Treatment of end face of cast billet - Google Patents
Treatment of end face of cast billetInfo
- Publication number
- JPS6012201A JPS6012201A JP12008683A JP12008683A JPS6012201A JP S6012201 A JPS6012201 A JP S6012201A JP 12008683 A JP12008683 A JP 12008683A JP 12008683 A JP12008683 A JP 12008683A JP S6012201 A JPS6012201 A JP S6012201A
- Authority
- JP
- Japan
- Prior art keywords
- face
- thermite
- solid piece
- slab
- cast billet
- 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.)
- Granted
Links
- 239000003832 thermite Substances 0.000 claims abstract description 31
- 239000007787 solid Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 229910001610 cryolite Inorganic materials 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- 239000005011 phenolic resin Substances 0.000 abstract description 3
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract 1
- 238000010304 firing Methods 0.000 abstract 1
- 229920001568 phenolic resin Polymers 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 iron oxide Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
Abstract
Description
【発明の詳細な説明】
この発明は鋳片の端面を処理す−る方法に関し、詳しく
は連続鋳造鋳片の端面を局部的ｔこ加熱し溶融させる処
理方法ｔこ一関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of treating the end face of a continuously cast slab, and more particularly to a method of locally heating and melting the end face of a continuously cast slab.
連続鋳造装置により鋳造した鋳片の一中心部には、収縮
孔であるセンターキャビティ（以下単にキャビティと称
する）が点在している。そして二の鋳片を圧延に先立っ
て加熱炉で加熱すると、鋳片端面に露出したキャビティ
部から酸化および脱炭力＝内部まで進行する端面酸化が
生じるので、品質糸１１持のため鋳片の両端部を圧延後
それぞれ８０〜１００ｋｇ程度を切捨てる必要があり、
不経済であった。またこの端面酸化を防止するために鋳
片の端面を溶接したり、）く−ナにより局部溶融させた
り、モルタルペーストを塗布したりしてキャビティを封
止する方法が試みられたが、熱鋳片の場合はいずれも鋳
造後の１０００°Ｃ以上もある鋳片の近傍で作業する必
要があるので難渋作業であり、冷鋳片の場合でも手間が
かかるものであった。Center cavities (hereinafter simply referred to as cavities), which are shrinkage holes, are dotted at one center of a slab cast by a continuous casting device. When the second slab is heated in a heating furnace prior to rolling, end face oxidation occurs, which progresses from the cavity exposed on the end face of the slab to the inside (= decarburization force). After rolling both ends, it is necessary to cut off about 80 to 100 kg each.
It was uneconomical. In order to prevent this end face oxidation, attempts have been made to seal the cavity by welding the end face of the slab, locally melting it with a hammer, or applying mortar paste. In the case of slabs, the work is difficult because it is necessary to work in the vicinity of the slab, which is heated to over 1000°C after casting, and even in the case of cold slabs, it is time-consuming.
この発明は上記従来の欠点を解消するもので、鋳片の端
面酸化防止処理を迅速容易におこなうことができる鋳片
の端面処理方法を提供しようとするものである。The present invention solves the above-mentioned conventional drawbacks, and aims to provide a method for treating the end face of a slab, which can quickly and easily perform oxidation prevention treatment on the end face of the slab.
しかしてこの発明の要旨とするところは、テルミット剤
をバインダーを用いて固形化して成るテルミット固形片
を、鋳片の端面中央部に圧接し、上記テルミット固形片
を加熱して着火させ、上記テルミット固形片の反応熱に
より上記鋳片の上記テルミット固形片圧接部付近を溶融
させたのち固化させることを特徴上する鋳片の端面処廟
方法にある。However, the gist of the present invention is to press a thermite solid piece obtained by solidifying a thermite agent using a binder to the center of the end face of a slab, heat the thermite solid piece to ignite the thermite solid piece, and ignite the thermite solid piece. The method for treating the end face of a cast slab is characterized in that the vicinity of the pressed part of the thermite solid piece of the cast slab is melted by reaction heat of the solid piece, and then solidified.
この発明におけるテルミツト剤としては、アルミニウム
粉末と酸化鉄などの酸化金属の混合物に、塩素酸ソーダ
などの酸化剤、氷晶石なとの助燃剤等を添加したものを
用いる。この酸化剤と助燃剤の配合量により着火速度を
コントロールすることができる。またこの発明における
バインダーとしては、フェノールレジンなどの有機質バ
インダーが好適であるが、珪酸ソーダなどの無機質バイ
ンダーなど他の材料を用Ｇ・ることもできる。The thermite agent used in this invention is a mixture of aluminum powder and a metal oxide such as iron oxide, to which is added an oxidizing agent such as sodium chlorate, a combustion improver such as cryolite, and the like. The ignition speed can be controlled by adjusting the amount of the oxidizing agent and combustion improver. Further, as the binder in this invention, an organic binder such as phenol resin is suitable, but other materials such as an inorganic binder such as sodium silicate may also be used.
以下第１図によりこの発明の一実施例を説明する。An embodiment of the present invention will be explained below with reference to FIG.
アルミニウム粉末２０％（重量％、以下同じ）。Aluminum powder 20% (weight %, same below).
酸化鉄（スケール）７０％、塩素酸ソーダ２％、氷晶石
４％、フェノールレジン４％の配合比を有するテルミツ
ト剤とバインダーの混合物を加熱成形して直径５０ａｙ
ｚ、厚さ２Ｑｖｔｍのテルミット固形片ｔ ヲｉり。エ
アシリンダー２のピストンロッド３の先端に固着した抑
圧板４には、鋳片５の端面６に対向する面に爪７が適数
個突設してあり、上記テルミット固形片ｌをこの爪７に
係止させて押圧板４に保持させる。次にエアシリンダー
２を駆動してピストンロッド３を矢印Ｘ方向に突出させ
、連続鋳造され切断された直後の鋳片５の端面６の中央
部にテルミット固形片ｌを圧接する。テルミット固形片
１は鋳片５の保有する熱で加熱されて圧接後約２０〜３
０秒で着火し、約５〜１０秒間のテルミット反応により
酸化鉄は還元され、その反応熱により鋳片５の端面６の
テルミット固形片圧接部付近が局部的に溶融する。テル
ミット反応終了後ピストンロッド３を引込め、自然放冷
すれば、端部６の溶融部およびテルミツト剤中の酸化鉄
の溶融物は凝固し、これによって端部６に露出していた
キャビティ８が封止されるのである。A mixture of thermite and binder with a blending ratio of 70% iron oxide (scale), 2% sodium chlorate, 4% cryolite, and 4% phenol resin is heated and molded to a diameter of 50 ay.
z, a solid piece of thermite with a thickness of 2 Qvtm. A suppressing plate 4 fixed to the tip of the piston rod 3 of the air cylinder 2 has an appropriate number of claws 7 protruding from the surface facing the end surface 6 of the slab 5. is held by the press plate 4. Next, the air cylinder 2 is driven to cause the piston rod 3 to protrude in the direction of the arrow X, and the thermite solid piece 1 is pressed against the center of the end face 6 of the slab 5 that has just been continuously cast and cut. The thermite solid piece 1 is heated by the heat possessed by the cast piece 5, and after pressure welding, the thermite solid piece 1 becomes about 20 to 3
It ignites in 0 seconds, and the iron oxide is reduced by the thermite reaction for about 5 to 10 seconds, and the heat of the reaction causes local melting of the thermite solid piece contact area on the end face 6 of the slab 5. After the thermite reaction is completed, the piston rod 3 is withdrawn and allowed to cool naturally. The molten part at the end 6 and the melted iron oxide in the thermite agent solidify, and the cavity 8 exposed at the end 6 is thereby solidified. It is sealed.
上記の端面処理を施した鋳片は、加熱炉における加熱後
の端面酸化特有の点状スケ−ルの発生が極めて少なく、
実験によると端面処理を施さない鋳片に比べて鋳片端部
の圧延後の切捨所要量は約／１０程度に減少する。The slabs subjected to the above-mentioned end face treatment have extremely little occurrence of dot scale, which is characteristic of end face oxidation after heating in a heating furnace.
According to experiments, the required amount of cut off of the end of the slab after rolling is reduced to about 1/10 compared to a slab without end face treatment.
この発明は上記実施例に限定されるものではなく、たと
えばテルミット固形片の原料配合比や形状などは上記以
外のものとしてもよい。またテルミット固形片を鋳片の
端面に圧接する装、置も上記以外のものを用いてもよい
。また上記実施例においては切断直後の鋳片に端面処理
をおこなったので鋳片の保有する熱を最も有効にテルミ
ット固形片の着火のために利用できるとともに、その後
の加熱炉等への搬送中における端面酸化も防止、される
という利点があるが、鋳造後の鋳片の搬送経路の都合な
どによっては加熱炉装入直前部などで□上記端面処理を
おこなってもよい。The present invention is not limited to the above-described embodiments; for example, the raw material blending ratio and shape of the thermite solid pieces may be other than those described above. Further, devices other than those described above may be used for pressing the thermite solid piece against the end face of the slab. In addition, in the above example, since the end face treatment was performed on the slab immediately after cutting, the heat retained in the slab can be used most effectively for igniting the thermite solid pieces, and during subsequent transportation to a heating furnace etc. Although there is an advantage that end face oxidation is also prevented, depending on the convenience of the conveyance route of the slab after casting, the above end face treatment may be carried out immediately before charging into the heating furnace.
以上は熱鋳片の端面処理について説明したが、この発明
は冷鋳片の端面処理にも適用でき、この場合はガスバー
ナ等の加熱源を用いてテルミット固形片を加熱して着火
させればよい。The above description has been about the end face treatment of hot slabs, but the present invention can also be applied to the end face treatment of cold slabs. In this case, thermite solid pieces may be heated and ignited using a heat source such as a gas burner. .
以上説明したようをここの発明によれば、テルミット剤
ヲハインダーを用いて固形化したテルミット固形片によ
り鋳片端面の局部溶融をおこなうので、テルミツト剤を
極めて取扱容易な固形状態で使用することができ、簡潔
な処理工程により迅速容易に鋳片の端面酸化防止処理を
おこなうことができ、処理装置の自動化も容易である。As explained above, according to the present invention, the thermite agent can be used in a solid state that is extremely easy to handle because the end face of the slab is locally melted using solid thermite pieces that have been solidified using a thermite binder. The end face oxidation prevention treatment of the slab can be performed quickly and easily through a simple treatment process, and the treatment equipment can be easily automated.
、第１図はこの発明の一実施例を示す工程説明図である
。
１−・・テルミット固形片、５・・・鋳片、６・・・端
部。
出願人 大同特殊鋼株式会社
代理人 乾 晶 雄, FIG. 1 is a process explanatory diagram showing an embodiment of the present invention. 1-... Thermite solid piece, 5... Cast piece, 6... End part. Applicant Daido Steel Co., Ltd. Agent Akira Inui
Claims (1)
テルミット固形片を、鋳片の端面中央部に圧接し、上記
テルミット固形片を加熱して着火させ、上記テルミット
固形片の反応熱により上記鋳片の上記チルミツｉ・固形
片圧接部付近を溶融させたのち固化させることを特徴と
する鋳片の端面処理方法。 ２ 鋳片の保有する熱によりテルミット固形片を加熱し
て着火させる特許請求の範囲第１項記載の鋳片の端面処
理方法。[Claims] 1. A solid piece of thermite obtained by solidifying a thermite agent using a binder is pressed against the center of the end face of the cast piece, and the solid piece of thermite is heated and ignited to cause a reaction of the solid piece of thermite. A method for treating an end face of a slab, characterized in that the vicinity of the chilled portion of the slab and the solid piece pressure welding portion of the slab is melted by heat, and then solidified. 2. The method for treating the end face of a cast slab according to claim 1, wherein the thermite solid piece is heated and ignited using the heat possessed by the cast slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12008683A JPS6012201A (en) | 1983-06-30 | 1983-06-30 | Treatment of end face of cast billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12008683A JPS6012201A (en) | 1983-06-30 | 1983-06-30 | Treatment of end face of cast billet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6012201A true JPS6012201A (en) | 1985-01-22 |
| JPH0144401B2 JPH0144401B2 (en) | 1989-09-27 |
Family
ID=14777557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12008683A Granted JPS6012201A (en) | 1983-06-30 | 1983-06-30 | Treatment of end face of cast billet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6012201A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6228054A (en) * | 1985-07-26 | 1987-02-06 | Kawasaki Steel Corp | Method for preventing internal oxidation of continuously cast ingot |
| US7063508B2 (en) * | 2002-06-07 | 2006-06-20 | Mitsubishi Heavy Industries, Ltd. | Turbine rotor blade |
| US7444946B2 (en) * | 2004-09-14 | 2008-11-04 | Halliburton Energy Services, Inc. | Material management apparatus, systems, and methods |
-
1983
- 1983-06-30 JP JP12008683A patent/JPS6012201A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6228054A (en) * | 1985-07-26 | 1987-02-06 | Kawasaki Steel Corp | Method for preventing internal oxidation of continuously cast ingot |
| US7063508B2 (en) * | 2002-06-07 | 2006-06-20 | Mitsubishi Heavy Industries, Ltd. | Turbine rotor blade |
| US7444946B2 (en) * | 2004-09-14 | 2008-11-04 | Halliburton Energy Services, Inc. | Material management apparatus, systems, and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0144401B2 (en) | 1989-09-27 |
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