JPH01309935A - Copper alloy for hot scarfing nozzle unit of steel - Google Patents
Copper alloy for hot scarfing nozzle unit of steelInfo
- Publication number
- JPH01309935A JPH01309935A JP13848688A JP13848688A JPH01309935A JP H01309935 A JPH01309935 A JP H01309935A JP 13848688 A JP13848688 A JP 13848688A JP 13848688 A JP13848688 A JP 13848688A JP H01309935 A JPH01309935 A JP H01309935A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle unit
- steel
- copper alloy
- hot scarfing
- alloy
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 16
- 239000010959 steel Substances 0.000 title claims abstract description 16
- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 9
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 abstract description 17
- 239000000956 alloy Substances 0.000 abstract description 17
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000002244 precipitate Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- ZTXONRUJVYXVTJ-UHFFFAOYSA-N chromium copper Chemical compound [Cr][Cu][Cr] ZTXONRUJVYXVTJ-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Conductive Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、鋼のホットスカーフィングノズルユニット用
銅合金に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copper alloy for hot scarfing nozzle units of steel.
［従来の技術］
近年、鋼の表面品質に対する要求は厳しさを増しており
、該要求に呼応して中間製品である鋼片段階での欠陥除
去の重要性は益々高くなってきている。[Prior Art] In recent years, requirements for the surface quality of steel have become more severe, and in response to these requirements, the importance of removing defects at the stage of steel slabs, which are intermediate products, has become increasingly important.
上記の鋼片階段での欠陥除去の方法として、スカーフィ
ングがあり、これは鋼片の表面欠陥を溶剤によって取り
除く方法である。スカーフィングのうち、１０００℃以
上の熱間において鋼片に対し連続的にスカーフィングを
行なうものがホットスカーフィングとよばれている。Scarfing is a method for removing defects in the above-mentioned steel billet staircase, and this is a method of removing surface defects of the steel billet using a solvent. Among scarfing methods, a method in which scarfing is performed continuously on a steel piece at a temperature of 1000° C. or higher is called hot scarfing.
ホットスカーフィングを行なう装置の中で、上記したよ
うに鋼片の表面欠陥を溶剤するのが第１図に示すノズル
ユニットと呼ばれる部分である。In the hot scarfing apparatus, a part called a nozzle unit shown in FIG. 1 is used to remove surface defects of the steel piece with a solvent as described above.
ノズルユニットは、シュー２、アッパーブレヒートブロ
ック４、ローアブレヒートブロック５等を主体として構
成されている。このノズルユニットは、溶融または凝固
直後の高温の鋼片に接触または近接して配置されており
、常に高温下にさらされている。The nozzle unit is mainly composed of a shoe 2, an upper reheat block 4, a lower reheat block 5, and the like. This nozzle unit is placed in contact with or in close proximity to a hot steel piece that has just been melted or solidified, and is constantly exposed to high temperatures.
ノズルユニット、特にシュー２、アッパーブレヒートブ
ロック４、ローアブレヒートブロック５はかように過酷
な条件下で使用されるため、内部は水冷構造となってお
り、また、冷却効果を十分に発揮するために、その材料
には高熱伝導率（高導電率）とともに高耐熱強度が必要
とされる。Since the nozzle unit, especially the shoe 2, upper reheat block 4, and lower reheat block 5, are used under such harsh conditions, the interior has a water-cooled structure and has a sufficient cooling effect. Therefore, the material must have high thermal conductivity (high electrical conductivity) and high heat-resistant strength.
そこで、かかる材料として従来Ｊ：リクロム銅合金が使
用されている。Therefore, J: Lichrome copper alloy has been conventionally used as such a material.
［発明が解決しようとする課題］
しかしながら、上記クロム銅合金を使用したホットスカ
ーフィングノズルには、割れが発生し易く、現状では頻
繁に補修を行ないながら使用しており、補修に多大な費
用が必要であると共に、生産性の低下をもたらしている
。[Problems to be Solved by the Invention] However, hot scarfing nozzles using the above-mentioned chromium-copper alloy are prone to cracking, and currently, they are used with frequent repairs, and repairs are costly. Not only is this necessary, but it also brings about a decline in productivity.
本発明は、上記従来技術の課題を解決して、割れの発生
の生じない鋼のホットスカーフィングノズルユニット用
銅合金を提供するものである。The present invention solves the above problems of the prior art and provides a copper alloy for a steel hot scarfing nozzle unit that does not cause cracking.
［課題を解決するための手段］
本発明はＣｒ ： ０．２〜１．５ｗｔ％、Ｚｒ：０．
０５〜０．３５ｗｔ％、Ｐ：０．０１〜０．０５ｗｔ％
を含有し、残部が実質的にＣｕである鋼のホットスカー
フィングノズルユニット用銅合金にその要旨が存在する
。[Means for Solving the Problems] The present invention includes Cr: 0.2 to 1.5 wt%, Zr: 0.
05-0.35wt%, P: 0.01-0.05wt%
The gist lies in a copper alloy for a hot scarfing nozzle unit made of steel, the remainder of which is substantially Cu.
［作用］
本発明者は、鋼のホットスカーフィングノズルユニット
用の従来の銅合金に発生１ノでいた割れについて鋭意研
究を重ねた結果、割ねの原因は粒界疲労破壊にあること
を見い出した。[Function] As a result of extensive research into the cracks that occurred in conventional copper alloys for steel hot scarfing nozzle units, the inventor found that the cause of the cracks was intergranular fatigue fracture. Ta.
そこで、本発明者は、粒界疲労破壊の発生がなく、かつ
、ホットスカーフィングノズルユニット用として必要と
されるその他の性質をも満足する材料を鋭意探究し本発
明を完成するに至った。Therefore, the inventor of the present invention earnestly searched for a material that does not cause intergranular fatigue fracture and also satisfies other properties required for a hot scarfing nozzle unit, and finally completed the present invention.
以下に本発明合金の各含有元素の作用および限定理由を
説明する。The effects and reasons for limitations of each element contained in the alloy of the present invention will be explained below.
Ｃｒ ： ０．２〜１．５ｗｔ％
Ｃｒは、Ｃｕ母相中に微細な金属Ｃｒとして析出し、硬
度を向上させる。Ｃｒ含有量が０．２ｗｔ％未満では、
析出処理を行なっても析出するＣｒｉが少なく、硬度の
向上は期待できない。また、Ｃｒ含有量が１．５ｗｔ％
を越えると、巨大な初晶Ｃｒが晶出し硬度の向上にはほ
とんど寄与しない。よって、Ｃｒ含有量は０．２〜１．
５ｗｔ％とする。Cr: 0.2 to 1.5 wt% Cr precipitates as fine metallic Cr in the Cu matrix and improves hardness. When the Cr content is less than 0.2wt%,
Even if the precipitation treatment is performed, only a small amount of Cri precipitates, and no improvement in hardness can be expected. In addition, the Cr content is 1.5wt%
If the value exceeds 100%, gigantic primary Cr crystals will crystallize and will hardly contribute to improving the hardness. Therefore, the Cr content is between 0.2 and 1.
It is set to 5wt%.
Ｚ ｒ ： Ｏ，ＯＯ５〜０．３５ｗｔ％Ｚｒは、Ｃｕ
中に微細なＣｕ、Ｚｒとして析出し、硬度と耐熱性およ
び疲労特性を向上させる。Zr: O,OO5~0.35wt%Zr is Cu
It precipitates as fine Cu and Zr inside, improving hardness, heat resistance, and fatigue properties.
Ｚｒの含有量が０．００５ｗｔ％未満では、析出処理を
行なっても微細なＣｕ５Ｚｒ（７）−析出量が少なく、
上記特性の向上は望めない。一方、Ｚｒ含有量が０．３
５ｗｔ％を越えると巨大なＣｕ３ Ｚｒが析出する。こ
の巨大なＣｕ、Ｚｒは、上記した微細なＣｕ３Ｚｒの有
する特性は有していないばかりでなく、導電率の低下を
まねく。したがフて、Ｚｒ含有量は０．００５〜０．３
５ｗｔ％とする。When the Zr content is less than 0.005 wt%, the amount of fine Cu5Zr(7)-precipitated is small even if the precipitation treatment is performed.
No improvement in the above characteristics can be expected. On the other hand, when the Zr content is 0.3
If it exceeds 5 wt%, a huge amount of Cu3Zr will precipitate. This giant Cu and Zr not only do not have the characteristics of the fine Cu3Zr described above, but also lead to a decrease in electrical conductivity. Therefore, the Zr content is 0.005 to 0.3
It is set to 5wt%.
Ｐ：０．０１〜０．０５ｗｔ％
Ｐは脱酸剤としての作用を有しているが、本発明におい
ては、粒界の水素脆化防止ひいては粒界疲労防止の観点
から含有せしめる点に特徴がある。Ｐの含有量が０．０
１ｗｔ％未満では上記の脱酸作用および水素脆化防止の
効果が期待できない。一方、Ｐの含有量が０．０５ｗｔ
％を越えると導電率の低下が著しくなる。したがってＰ
の含有量は０，０１〜０．０５ｗｔ％とする。P: 0.01 to 0.05 wt% P has an action as a deoxidizing agent, but the present invention is characterized in that it is included from the viewpoint of preventing hydrogen embrittlement at grain boundaries and further preventing grain boundary fatigue. There is. P content is 0.0
If it is less than 1 wt%, the above-mentioned deoxidizing effect and hydrogen embrittlement prevention effect cannot be expected. On the other hand, the P content is 0.05wt
%, the conductivity decreases significantly. Therefore P
The content is 0.01 to 0.05 wt%.
なお、残部は実質的にＣｕであるが、結晶粒微細化元素
（たとえばＴａ、Ｍｇ、Ｔｉ、Ｂなど）の１種または２
種以上をそれぞれ０．０５ｗｔ％を上限として添加して
もよい。The remainder is essentially Cu, but one or two of the grain refining elements (for example, Ta, Mg, Ti, B, etc.)
You may add more than 0.05 wt% of each species.
［実施例］ 以下に実施例を挙げて本発明を具体的に説明する。[Example] The present invention will be specifically described below with reference to Examples.
第１表に示す成分の合金訪魂を９５０℃で減面率５０％
で熱間加工後、１０２０℃で溶体化処理し、溶体化処理
後５００℃〜５６０℃で２時間時効処理を施した。The area reduction rate of the alloy with the ingredients shown in Table 1 is 50% at 950℃.
After hot working, solution treatment was performed at 1020°C, and after the solution treatment, aging treatment was performed at 500°C to 560°C for 2 hours.
このようにして得られた試料について、硬度（耐熱強度
を評価）、導電率の測定およびミクロ観察を行なフた６
硬度および導電率の測定結果を′ｆＳ２表に示す。第２
表において試料Ａ、Ｂ、Ｃ。The samples thus obtained were measured for hardness (evaluation of heat resistance strength), electrical conductivity, and microscopic observation.
The hardness and conductivity measurement results are shown in Table 'fS2. Second
Samples A, B, and C in the table.
Ｄは本発明合金であり、硬度は１２９乃至１３２（ＨＶ
）の範囲であり、導電率（％Ｉ ＡＣ３）も８０以上
と良好な値を示している。D is an alloy of the present invention, and has a hardness of 129 to 132 (HV
), and the electrical conductivity (%I AC3) also shows a good value of 80 or more.
試ＩＦ、Ｇ、Ｈは比較合金である。合金ＧはＺｒ含有量
が０．３７ｗｔ％と高く、導電率が８０に満たない。ま
た、合金ＨはＣｒ含有量が０．１５ｗｔ％と低く、硬度
が１０３（Ｈｖ）と低い値となっている。Samples IF, G, and H are comparative alloys. Alloy G has a high Zr content of 0.37 wt% and a conductivity of less than 80. Furthermore, Alloy H has a low Cr content of 0.15 wt% and a low hardness of 103 (Hv).
さらに合金ＦはＣｒの含有量が１．７ｗｔ％と高く、ま
た、合金ＧはＺｒ含有景が０．３７と高いためにミクロ
観察の結果いずれも巨大な析出物が認められた。Furthermore, Alloy F has a high Cr content of 1.7 wt%, and Alloy G has a high Zr content of 0.37, so microscopic observation revealed huge precipitates in both.
試料Ｅは従来合金であり、本発明合金と同様に硬度、導
電率共に良好な値を示した。Sample E is a conventional alloy and, like the alloy of the present invention, exhibited good values for both hardness and electrical conductivity.
すなわち、硬度、導電率、ミクロ観察の結果、硬度１２
５（ＨＶ）以上、導電率８０以上で強大な析出物の詔め
られなかった合金は、本発明合金のＡ、Ｂ、Ｃ，Ｄと従
来合金のＥであった。That is, as a result of hardness, conductivity, and microscopic observation, the hardness is 12
The alloys that had a conductivity of 5 (HV) or more and a conductivity of 80 or more and were free of strong precipitates were the alloys A, B, C, and D of the present invention and the conventional alloy E.
上記合金Ａ、Ｂ、Ｃ，Ｄ、Ｅについて疲労試験を実施し
た。この疲労試験は、小野式回転曲げ疲労試験機を用い
て３００℃にて測定を行なった。Fatigue tests were conducted on the alloys A, B, C, D, and E. This fatigue test was carried out at 300° C. using an Ono rotary bending fatigue tester.
なお、回転数は２８００ｒｐｍとした。この測定結果を
Ｓ−Ｎ線図（第２図）に示す。第２図に示すごとく、本
発明合金である試料Ａ、Ｂ、Ｃ。Note that the rotation speed was 2800 rpm. The measurement results are shown in the S-N diagram (Fig. 2). As shown in FIG. 2, samples A, B, and C are alloys of the present invention.
Ｄは、疲労特性が従来合金已に比べ大幅に向上している
ことがわかる。It can be seen that fatigue properties of D were significantly improved compared to conventional alloys.
以上の評価結果を第３表にまとめて示す。第３表におい
てＯは良好なことを示し、Ｘは不良を示す。第３表から
れかるように、本発明合金は、従来合金および比較合金
に比較して、硬度、導電率、組織の均一性、疲労特性の
全てにおいて良好な性質を示した。The above evaluation results are summarized in Table 3. In Table 3, O indicates good quality and X indicates poor quality. As can be seen from Table 3, the alloy of the present invention exhibited better properties in all aspects of hardness, electrical conductivity, uniformity of structure, and fatigue properties compared to the conventional alloy and comparative alloy.
本発明合金を使用してシュー２、アッパブレヒートブロ
ック４、ローアブレヒートブロック５を作製し、ホット
スカーフィングノズルユニットを組立てた。このホット
スカーフィングユニットを使用してホットスカーフィン
グを行なったところ繰り返し便用後においても割れの発
生はなかった。すなわち、綱片の温度を９５０〜１００
０℃とし、繰り返し使用したところ１２０００回（約３
ケ月）後においても割れは発生しなかった。A shoe 2, an upper reheat block 4, and a lower reheat block 5 were manufactured using the alloy of the present invention, and a hot scarfing nozzle unit was assembled. When hot scarfing was performed using this hot scarfing unit, no cracking occurred even after repeated use. In other words, the temperature of the rope piece is set to 950 to 100
When used repeatedly at 0℃, the temperature was 12,000 times (approximately 3
No cracking occurred even after 3 months).
［発明の効果コ
以上説明したごとく、本発明によれば、鋼片のホットス
カーフィングノズルユニットとして要求される硬度、導
電率ばかりでなく、疲労特性にも優れた鋼のホットスカ
ーフィングノズルユニット用銅合金を提供することがで
きる。[Effects of the Invention] As explained above, according to the present invention, a hot scarfing nozzle unit made of steel that has not only the hardness and conductivity required for a hot scarfing nozzle unit made of steel but also excellent fatigue properties is obtained. Copper alloys can be provided.
第 １ 表 第２表 第３表Table 1 Table 2 Table 3
第１図はホットスカーフィングノズルユニットの一部断
面図である。第２国は本発明合金および従来合金のＳ−
Ｎ線図である。
１・・・ヘッド、２・・・シュー、３・・・ライデイン
ダスキッド、４・・・アッパーブレヒートブロック、５
・・・ローアブレヒートブロック、６・・・アッパーブ
レヒートチップ、７・・・ローアブレヒートチップ、８
・・・酸素噴出口、９・・・シールド酸素チップ、１０
・・・冷却水供給口、１１酸素供給口、１２・・・燃料
ガス供給口、１３・・・冷却水排出口、１４・・・取付
ボルト、１５・・・シールド酸素供給口、１６・・・シ
ールド酸素アタッチメント。
第１図
１８７一FIG. 1 is a partial sectional view of the hot scarfing nozzle unit. In the second country, the S-
It is an N diagram. 1...Head, 2...Shoe, 3...Rider dust skid, 4...Upper break heat block, 5
...Low break heat block, 6...Upper break heat chip, 7...Low break heat chip, 8
...Oxygen outlet, 9...Shield oxygen chip, 10
...Cooling water supply port, 11 Oxygen supply port, 12...Fuel gas supply port, 13...Cooling water discharge port, 14...Mounting bolt, 15...Shield oxygen supply port, 16... - Shield oxygen attachment. Figure 1 187-
Claims (1)
ｗｔ％を含有し、残部が実質的にＣｕであることを特徴
とする鋼のホットスカーフィングノズルユニット用銅合
金。[Claims] Cr: 0.2 to 1.5 wt%, Zr: 0.005 to 0.35 wt%, P: 0.01 to 0.05
A copper alloy for a hot scarfing nozzle unit of steel, characterized in that it contains % by weight and the remainder is substantially Cu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13848688A JPH01309935A (en) | 1988-06-07 | 1988-06-07 | Copper alloy for hot scarfing nozzle unit of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13848688A JPH01309935A (en) | 1988-06-07 | 1988-06-07 | Copper alloy for hot scarfing nozzle unit of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01309935A true JPH01309935A (en) | 1989-12-14 |
Family
ID=15223218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13848688A Pending JPH01309935A (en) | 1988-06-07 | 1988-06-07 | Copper alloy for hot scarfing nozzle unit of steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01309935A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03292371A (en) * | 1990-04-09 | 1991-12-24 | Toagosei Chem Ind Co Ltd | Coating resin composition curable with actinic radiation |
| WO2017081969A1 (en) * | 2015-11-09 | 2017-05-18 | 三菱マテリアル株式会社 | Copper alloy material |
-
1988
- 1988-06-07 JP JP13848688A patent/JPH01309935A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03292371A (en) * | 1990-04-09 | 1991-12-24 | Toagosei Chem Ind Co Ltd | Coating resin composition curable with actinic radiation |
| WO2017081969A1 (en) * | 2015-11-09 | 2017-05-18 | 三菱マテリアル株式会社 | Copper alloy material |
| KR20180078244A (en) * | 2015-11-09 | 2018-07-09 | 미쓰비시 마테리알 가부시키가이샤 | Copper alloy material |
| US20180291490A1 (en) * | 2015-11-09 | 2018-10-11 | Mitsubishi Materials Corporation | Copper alloy material |
| EP3375897A4 (en) * | 2015-11-09 | 2019-04-03 | Mitsubishi Materials Corporation | Copper alloy material |
| CN108291275B (en) * | 2015-11-09 | 2020-03-13 | 三菱综合材料株式会社 | Copper alloy material |
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