JPS5818980B2 - Copper alloy with excellent ductility at medium and high temperatures - Google Patents
Copper alloy with excellent ductility at medium and high temperaturesInfo
- Publication number
- JPS5818980B2 JPS5818980B2 JP11134280A JP11134280A JPS5818980B2 JP S5818980 B2 JPS5818980 B2 JP S5818980B2 JP 11134280 A JP11134280 A JP 11134280A JP 11134280 A JP11134280 A JP 11134280A JP S5818980 B2 JPS5818980 B2 JP S5818980B2
- Authority
- JP
- Japan
- Prior art keywords
- medium
- excellent ductility
- high temperatures
- copper alloy
- 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.)
- Expired
Links
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【発明の詳細な説明】
本発明は、400〜700℃の中、高温域での延性の優
れたキュプロニッケルの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of cupronickel, which has excellent ductility in the high temperature range of 400 to 700°C.
キュプロニッケルは、変形加工が容易で耐食性が良好々
ので、熱交換、復水器等の材料として用いられている。Cupronickel is easy to deform and has good corrosion resistance, so it is used as a material for heat exchangers, condensers, etc.
しかしながらこのキュプロニッケルは、400〜700
℃の中、高温域で延性が十分でなく、粒界割れを発生し
やすいという脆化特性を有している。However, this cupronickel is 400 to 700
It does not have sufficient ductility in the high temperature range of ℃ and has embrittlement characteristics that cause intergranular cracks to easily occur.
この粒界割れは、中、高温域で、材料自体の残留応力が
高い場合あるいは応力が付加される場合に特に発生しや
すい。This intergranular cracking is particularly likely to occur in medium to high temperature ranges, when the residual stress of the material itself is high, or when stress is applied.
本発明は、このキュプロニッケルにおける中、高温域で
の脆化の問題を解決した鋼合金を提供することを目的と
してなされたものである。The purpose of the present invention is to provide a steel alloy that solves the problem of cupronickel's embrittlement in medium to high temperature ranges.
すなわち本発明は、Ni 5〜40 %、Fe O,4
〜2%、Mn1.2%以下、P O,00’ 5〜0.
02 %を含み、残部実質的にCuからなる中、高温で
の延性に優れた銅合金、である。That is, in the present invention, Ni 5-40%, FeO,4
~2%, Mn 1.2% or less, P O,00' 5~0.
It is a copper alloy with excellent ductility at high temperatures, with the remainder consisting essentially of Cu.
次に本発明合金の成分について説明する。Next, the components of the alloy of the present invention will be explained.
Niは塩化物溶液にだいする銅の耐食性を向上する。Ni improves the corrosion resistance of copper in chloride solutions.
とくに流動塩化物にだいする効果は犬である。In particular, the effect of liquid chloride is on dogs.
Niが5070以上で増加するにつれて、この耐食性も
向上するが、Niが40%を越えると静止した塩化物溶
液に対して点食が発生しやすぐなる。As the Ni content increases above 5070, this corrosion resistance also improves, but when the Ni content exceeds 40%, pitting corrosion easily occurs in a stationary chloride solution.
したがってNi5〜40係とする。Therefore, it is set as Ni5-40.
Feば2係まで添加することによって流動海水および塩
水にだいする銅−ニッケル合金の耐食性を向上する。By adding up to 2 parts of Fe, the corrosion resistance of the copper-nickel alloy in flowing seawater and salt water is improved.
まだ水中に含まれる砂によっておこるエロージョン・コ
ロ−ジョンにだいシテモ強くなるが、0.4%未満では
効果が不充分である。It is highly resistant to erosion and corrosion caused by sand still contained in water, but if it is less than 0.4%, the effect is insufficient.
捷だ、Feは400〜700℃ の温度領域で、固溶限
を越えたものが、析出する。However, in the temperature range of 400 to 700°C, Fe that exceeds the solid solubility limit precipitates.
特に粒界に析出したものは凝集し、脆化を助長さす。Particularly, those precipitated at grain boundaries aggregate and promote embrittlement.
したがってFe O,4〜2%とする。Therefore, Fe O is set at 4 to 2%.
Mnは銅や銅合金の脱酸を助け、また加工性を向上する
。Mn helps deoxidize copper and copper alloys and improves workability.
さらにMnは流動海水にだいして若干耐食性を向上する
が、■、2係を越えて添加する必要はない。Furthermore, although Mn slightly improves corrosion resistance in flowing seawater, it is not necessary to add more than 2.
Pは400〜700℃におけるFρ粒界析出を防止する
がo、oos%未満ではその効果は少ない。P prevents Fρ grain boundary precipitation at 400 to 700°C, but its effect is small at less than 0,00%.
またo、o2%越えて含まれると熱間加工性を害する。Moreover, if O or O is contained in an amount exceeding 2%, hot workability will be impaired.
したがってPo、005〜0.02%とする。次に本発
明の実施例を比較例と共に示す。Therefore, Po is set to 0.005 to 0.02%. Next, examples of the present invention will be shown together with comparative examples.
6屯コアレス炉にて、第1表の成分の90/10キユプ
ロニツケルの鋳塊(寸法 厚さ260mmX幅1ooo
、×長さ2000mm’)を半連続鋳造にて溶製し、ミ
ーリングで表面の片面を10rrtrrL面削し、厚さ
240TrrRとした。In a 6-tun coreless furnace, a 90/10 Cypronickel ingot (dimensions: thickness 260mm x width 1ooo
, x length 2000 mm') was produced by semi-continuous casting, and one side of the surface was milled by 10rrtrrL to give a thickness of 240TrrrR.
これらの鋳塊を加熱炉にて900〜950℃加熱後、熱
間圧延し、厚さ10mmとしだ。These ingots were heated in a heating furnace at 900 to 950°C, then hot rolled to a thickness of 10 mm.
ただし、いずれも熱間終了温度は700℃以上としだ。However, in both cases, the hot end temperature is 700°C or higher.
得られた板材の寸法を厚さ10朔X幅150wrL×長
さ40.0rranに切断し、大気中950℃で10h
r加熱後室温才で冷却し、圧延方向に直角に厚さ6rr
rmの高温引張試験片(形状ASTM−E8、ピンロー
ド テンション試験片幅12.5mm、平行部長さ50
.0mm)を作製し、400〜800℃で30分保持後
引張り速度1.2rrrrrL/mi nで中、高温引
張試験を行なった。The obtained plate material was cut into dimensions of 10 mm thick x 150 wr L x 40.0 rran long, and heated at 950°C in the atmosphere for 10 hours.
After heating, cool at room temperature and roll to a thickness of 6rr perpendicular to the rolling direction.
rm high temperature tensile test piece (shape ASTM-E8, pin load tension test piece width 12.5 mm, parallel length 50
.. After holding at 400 to 800° C. for 30 minutes, a medium and high temperature tensile test was conducted at a tensile rate of 1.2 rrrrr L/min.
試験結果を第2表に示す。The test results are shown in Table 2.
第2表から知られるように、本発明合金は400〜70
0℃の中、高温で従来合金よりも伸び、すなわち延性が
改善されている。As is known from Table 2, the alloy of the present invention has a
It has improved elongation, or ductility, compared to conventional alloys at temperatures as high as 0°C.
また950℃で10時間加熱後空冷し、500℃で5時
間熱処理した試料NO,1、A2およびA4を両面研磨
し、厚さ0.1mm、Lし、これらを13℃の氷酸酸9
5係+過塩素酸5係の電解液中で電圧70Vをかげ約3
0秒保持し、電顕観察用薄膜を作製し、粒界の析出物の
形態を調べた。In addition, samples No. 1, A2 and A4, which had been heated at 950°C for 10 hours, cooled in the air, and then heat-treated at 500°C for 5 hours, were polished on both sides to a thickness of 0.1 mm.
Approximately 3 volts under a voltage of 70 V in an electrolyte of 5 parts + 5 parts of perchloric acid
The sample was held for 0 seconds, a thin film for electron microscopic observation was prepared, and the morphology of precipitates at grain boundaries was examined.
試fprJf6.1 、A 2および44の電顕観察像
をそれぞれ第1図、第2図および第3図に示す。Electron microscopic images of samples fprJf6.1, A2 and 44 are shown in FIGS. 1, 2 and 3, respectively.
従来材の試料NO,1の粒界析出物はラメラ状に析出し
、その長さは1.5μ程度となっているが、本発明合金
は第2図および第3図に示すように微細な球状析出物と
なっていて、Pを添加することによって、粒界における
Feの析出、凝集および巨大化を抑制し得ることを示し
ている。The grain boundary precipitates in sample No. 1 of the conventional material are precipitated in a lamellar shape, and the length is about 1.5μ, but the alloy of the present invention has fine grain boundary precipitates as shown in Figs. 2 and 3. The result is a spherical precipitate, which indicates that the addition of P can suppress the precipitation, aggregation, and enlargement of Fe at grain boundaries.
以上述べて来たように、本発明合金は従来合金に比べて
、400〜700℃の中、高温域での延性に優れた材料
であり、熱交換器、復水器等の材料として好適なもので
ある。As stated above, the alloy of the present invention is a material with excellent ductility in the high temperature range of 400 to 700°C compared to conventional alloys, and is suitable as a material for heat exchangers, condensers, etc. It is something.
第1図、第2図、第3図は、それぞれ実施例の試料A1
、A2、A40合金についての電子顕微鏡写真(倍率2
0000倍)である。Figures 1, 2, and 3 are sample A1 of Example, respectively.
, A2, A40 alloys (magnification 2)
0000 times).
Claims (1)
以下、po、o O5〜0.02 %を含み、残部実質
的にCuからなる中、高温での延性に優れた銅合金。1 Ni5-40%, Fe0.4-2%, Mn1.2%
Hereinafter, a copper alloy containing 5 to 0.02% of po, o and the remainder substantially of Cu has excellent ductility at high temperatures.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11134280A JPS5818980B2 (en) | 1980-08-13 | 1980-08-13 | Copper alloy with excellent ductility at medium and high temperatures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11134280A JPS5818980B2 (en) | 1980-08-13 | 1980-08-13 | Copper alloy with excellent ductility at medium and high temperatures |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5743950A JPS5743950A (en) | 1982-03-12 |
JPS5818980B2 true JPS5818980B2 (en) | 1983-04-15 |
Family
ID=14558757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11134280A Expired JPS5818980B2 (en) | 1980-08-13 | 1980-08-13 | Copper alloy with excellent ductility at medium and high temperatures |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5818980B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5881944A (en) * | 1981-11-10 | 1983-05-17 | Furukawa Electric Co Ltd:The | Corrosion-resistant copper alloy |
US4578320A (en) * | 1984-03-09 | 1986-03-25 | Olin Corporation | Copper-nickel alloys for brazed articles |
KR920003002B1 (en) * | 1989-10-23 | 1992-04-13 | 삼성전자 주식회사 | Testing method of metal coin |
WO1993007589A1 (en) * | 1991-09-28 | 1993-04-15 | Anritsu Corporation | Device for sorting coins |
-
1980
- 1980-08-13 JP JP11134280A patent/JPS5818980B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5743950A (en) | 1982-03-12 |
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