JP2722628B2 - Plastic working method for B-containing Ni-base heat-resistant alloy - Google Patents
Plastic working method for B-containing Ni-base heat-resistant alloyInfo
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- JP2722628B2 JP2722628B2 JP1068868A JP6886889A JP2722628B2 JP 2722628 B2 JP2722628 B2 JP 2722628B2 JP 1068868 A JP1068868 A JP 1068868A JP 6886889 A JP6886889 A JP 6886889A JP 2722628 B2 JP2722628 B2 JP 2722628B2
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、Ｂ含有Ni基耐熱合金からなる加工素材
を、その加工素材に含有するボロン含有量を減少させる
ことなく塑性加工する方法に関するものであり、さらに
詳細には、 C :0.04〜0.25％ Cr:20.0〜25.0％ Mo:8.0 〜10.0％ B :0.001〜0.1％ を必須成分組成として含有するＢ含有Ni基耐熱合金か
ら、直径:8mm以下の細線材、板厚:5mm以下の薄板、肉
厚:5mm以下の薄肉管等をＢ含有量を減少させることなく
大気中で塑性加工により製造する方法に関するものであ
る。Description: FIELD OF THE INVENTION The present invention relates to a method for plastically processing a work material made of a B-containing Ni-base heat-resistant alloy without reducing the boron content contained in the work material. More specifically, C: 0.04 to 0.25% Cr: 20.0 to 25.0% Mo: 8.0 to 10.0% B: 0.001 to 0.1% From a B-containing Ni-base heat-resistant alloy containing as an essential component composition, the diameter: 8 mm The present invention relates to a method for producing a thin wire having the following thickness, a thin plate having a thickness of 5 mm or less, a thin tube having a thickness of 5 mm or less by plastic working in the atmosphere without reducing the B content.
上記、 C :0.04〜0.25％ Cr:20.0〜25.0％ Mo:8.0 〜10.0％ B :0.001〜0.1％ を必須成分組成として含有するＢ含有Ni基耐熱合金とし
て、 C :0.04〜0.25％， Cr:20.0〜25.0％， Mo:8.0 〜10.0％， B :0.001〜0.1％ を必須成分組成として含有し、さらに、 W :5.0％以下， Mn:1.5％以下， Si:1.0％以下， Fe:20.0％以下， Al:1.5％以下， Ti:1.0％以下， Co:20％以下， Cu:0.5％以下， のうち１種または２種以上を含有し、さらに必要に応じ
て、 Zr:0.05％以下,Ca:0.02％以下，希土類金属:0.02％以
下のうち１種または２種以上、 Nb,Ta,Hfのうち１種または２種以上を合計で５％以
下、 を含有し、残り:Niおよび不可避不純物からなる組成
（以上、重量％）を有するNi基耐熱合金が知られてお
り、このNi基耐熱合金は高温強度と耐酸化性に優れ、上
記Ni基耐熱合金に含有されるＢは、特に高温クリープ特
性向上に寄与することも知られている。これらＢ含有Ni
基耐熱合金のうち代表的なものは、特公昭55−9940号公
報に記載されている C :0.04〜0.25％， Cr:20.0〜25.0％， Fe:16.0〜20.0％， Mo:8.0 〜10.0％， W :0.2 〜1.0 ％， Mn:0.4 〜1.5 ％， Si:0.05〜0.5 ％， B :0.02％以下， Al:0.1％以下， Ti:0.02％以下， Co:0.6％以下， Zr:0.05％以下,Ca:0.02％以下，希土類金属:0.02％以
下のうち１種または２種以上を含有し、残り:Niおよび
不可避不純物からなる組成（以上、重量％）を有するNi
基耐熱合金、 AMS規格5536Hの C :0.05〜0.15％， Cr:20.5〜23.0％， Fe:17.0〜20.0％， Mo:8.0 〜10.0％， W :0.2 〜1.0 ％， Mn:1％以下， Si:1％以下， B :0.01％以下， Al:0.5 ％以下， Ti:0.15％以下， Co:0.5 〜2.5 ％以下， Cu:0.5％以下， P :0.04％以下， S :0.03％以下， を含有し、残り:Niおよび不可避不純物からなる組成
（以上、重量％）を有するNi基耐熱合金、 C :0.08％， Cr:21％， MO:9.0％， W :3％， B :0.003％， Al:0.3〜1.5％， Ti:0.1〜1.0％， Co:4.7〜9.4％， を含有し、残り:Niおよび不可避不純物からなる組成
（以上、重量％）を有するNi基耐熱合金、 C :0.08％， Cr:21％， Mo:9.0％， W :0.003％， Al:0.5％， Ti:0.3％， Co:12％， を含有し、残り:Niおよび不可避不純物からなる組成
（以上、重量％）を有するNi基耐熱合金、などのNi基耐
熱合金が知られている。Above, C: 0.04 to 0.25% Cr: 20.0 to 25.0% Mo: 8.0 to 10.0% B: 0.001 to 0.1% As a B-containing Ni-based heat-resistant alloy containing 0.001 to 0.1% as an essential component composition, C: 0.04 to 0.25%, Cr: 20.0 ~ 25.0%, Mo: 8.0 ~ 10.0%, B: 0.001 ~ 0.1% as essential components, W: 5.0% or less, Mn: 1.5% or less, Si: 1.0% or less, Fe: 20.0% Al: 1.5% or less, Ti: 1.0% or less, Co: 20% or less, Cu: 0.5% or less, contains one or more of them, and if necessary, Zr: 0.05% or less, Ca: 0.02% or less, Rare earth metal: One or more of 0.02% or less, Nb, Ta, Hf contains one or more of 5% or less in total, remaining: Ni and inevitable A Ni-base heat-resistant alloy having a composition (above, by weight) composed of impurities is known. This Ni-base heat-resistant alloy has excellent high-temperature strength and oxidation resistance. High temperature creep characteristics It is also known to contribute to the improvement. These B-containing Ni
Representative of the base heat-resistant alloys are C: 0.04 to 0.25%, Cr: 20.0 to 25.0%, Fe: 16.0 to 20.0%, Mo: 8.0 to 10.0% described in JP-B-55-9940. , W: 0.2 to 1.0%, Mn: 0.4 to 1.5%, Si: 0.05 to 0.5%, B: 0.02% or less, Al: 0.1% or less, Ti: 0.02% or less, Co: 0.6% or less, Zr: 0.05% The following contains one or more of Ca: 0.02% or less and rare earth metal: 0.02% or less, and the rest: Ni having a composition (more than wt%) composed of Ni and unavoidable impurities
Base heat-resistant alloy, AMS standard 5536H C: 0.05 ~ 0.15%, Cr: 20.5 ~ 23.0%, Fe: 17.0 ~ 20.0%, Mo: 8.0 ~ 10.0%, W: 0.2 ~ 1.0%, Mn: 1% or less, Si : 1% or less, B: 0.01% or less, Al: 0.5% or less, Ti: 0.15% or less, Co: 0.5 to 2.5% or less, Cu: 0.5% or less, P: 0.04% or less, S: 0.03% or less Contains, the remainder: Ni-base heat-resistant alloy having a composition of Ni and unavoidable impurities (above, by weight%), C: 0.08%, Cr: 21%, MO: 9.0%, W: 3%, B: 0.003%, Al: 0.3 to 1.5%, Ti: 0.1 to 1.0%, Co: 4.7 to 9.4%, and the rest: Ni-base heat-resistant alloy having a composition of Ni and unavoidable impurities (above, by weight), C: 0.08 %, Cr: 21%, Mo: 9.0%, W: 0.003%, Al: 0.5%, Ti: 0.3%, Co: 12%, and the rest: a composition consisting of Ni and unavoidable impurities ), And other Ni-base heat-resistant alloys.
これらＢ含有Ni基耐熱合金のうちでも特に原子炉の熱
交換器などに用いられる特公昭55−9940号公報記載のＢ
含有Ni基耐熱合金線材を加工するには、次のようにされ
ていた。Among these B-containing Ni-base heat-resistant alloys, those described in JP-B-55-9940, which are used particularly for heat exchangers of nuclear reactors, etc.
To process a Ni-base heat-resistant alloy wire rod, the following method was used.
まず通常の真空誘導溶解炉により溶解し鋳造して作製
された所望の成分組成を有するＢ含有Ni基耐熱合金イン
ゴットを、温度:1180℃で分塊鍛造してビレットを作製
し、このビレットを、温度:1150℃30分保持後水冷の中
間焼鈍したのち、酸洗し、冷間引抜して丸棒とし、さら
に温度:1150℃30分保持後水冷の中間焼鈍−酸洗−冷間
引抜を２回以上繰返して線材とし、最終的に、温度:118
0℃１時間保持後水冷の中間焼鈍−酸洗−冷間引抜し、
さらに必要に応じて温度:1180℃で最終熱処理して細線
材を製造していた。すなわち、一般に、Ｂ含有Ni基耐熱
合金を加工するには、分塊鍛造温度、熱間加工温度、冷
間引抜前の中間焼鈍温度および最終熱処理温度は、1150
〜1180℃で実施されていたのである。First, a B-containing Ni-based heat-resistant alloy ingot having a desired component composition produced by melting and casting with a normal vacuum induction melting furnace is subjected to bulk forging at a temperature of 1180 ° C. to produce a billet. Temperature: Hold at 1150 ° C for 30 minutes, perform water-cooled intermediate annealing, then pickle and cold-draw to form a round bar. Temperature: Hold at 1150 ° C for 30 minutes and perform water-cooled intermediate annealing-pickling-cold drawing. The wire is repeated at least once, and finally the temperature is 118.
After holding at 0 ° C for 1 hour, water-cooled intermediate annealing-pickling-cold drawing,
Further, if necessary, a final heat treatment was performed at a temperature of 1180 ° C. to produce a thin wire. That is, in general, in order to process a B-containing Ni-base heat-resistant alloy, the forging temperature, hot working temperature, intermediate annealing temperature before cold drawing, and final heat treatment temperature are 1150%.
It was carried out at ~ 1180 ° C.
ところが、上記溶解し鋳造して作製された例えばB:80
ppm含有Ni基耐熱合金インゴットを、温度:1180℃で分塊
鍛造して直径:10mmのビレットを作製し、上記ビレット
を、温度:1150℃30分間保持後水冷の中間焼鈍−酸洗−
冷間引抜を２回以上繰返し、最終的に、温度:1180℃１
時間保持後水冷の中間焼鈍−酸洗−冷間引抜して直径:
1.6mmの線材を作製したところ、上記直径:1.6mmの線材
Ｂ含有量は、5ppmに減少し、インゴットのＢ含有量:80p
pmよりも大幅に少ないＢ含有量のNi基耐熱合金線材が作
製されるという現象が生じたのである。すなわち、イン
ゴットから線材に加工する途中で75ppmもの大幅なＢ含
有量の減少が生じたのである。このような現象は、オー
ステナイト系Ni基耐熱合金では、従来、見出されていな
かったのである。このような現象は、特にNi基耐熱合金
の表面ほど顕著に現れるので、Ｂ含有Ni基耐熱合金イン
ゴットから細線材、薄板、薄肉管などを製造する場合に
特に顕著に現れ、所定のＢ含有量を有するNi基耐熱合金
細線材、薄板、薄肉管などが得られず、そのため高温ク
リープ特性など所望の機械的特性が得られないという問
題点が生じたのである。However, for example, B: 80 produced by melting and casting the above
A ppm-containing Ni-based heat-resistant alloy ingot was subjected to block forging at a temperature of 1180 ° C. to produce a billet having a diameter of 10 mm.
Repeat cold drawing twice or more, and finally, temperature: 1180 ℃ 1
After holding for a while, water-cooled intermediate annealing-pickling-cold drawing and diameter:
When a 1.6 mm wire was manufactured, the above-described diameter: the content of the 1.6 mm wire B was reduced to 5 ppm, and the B content of the ingot was 80 p.
This resulted in the phenomenon that a Ni-based heat-resistant alloy wire having a B content much smaller than pm was produced. In other words, a significant reduction in the B content of as much as 75 ppm occurred during the processing of the ingot into the wire. Such a phenomenon has not been found in the austenitic Ni-base heat-resistant alloy. Since such a phenomenon is particularly prominent on the surface of a Ni-base heat-resistant alloy, it is particularly prominent when a thin wire, a thin plate, a thin-walled tube, or the like is manufactured from a B-containing Ni-base heat-resistant alloy ingot, and a predetermined B content. Therefore, there was a problem that desired mechanical properties such as high-temperature creep properties could not be obtained because a Ni-based heat-resistant alloy thin wire, a thin plate, a thin-walled tube, or the like having the above-mentioned properties could not be obtained.
〔課題を解決するための手段〕 そこで、本発明者らは、かかる問題点を解決すべく下
記のごとき研究を行った。[Means for Solving the Problems] Therefore, the present inventors have conducted the following researches in order to solve such problems.
まず、 C :0.08％， Cr:21.9％， Mo:9.0％， B :50ppm, を含有し、さらに、 Fe:18.5％， W :0.45％， Mn:0.9％， Si:0.3％， Al:0.01％， Ti:0.01％， Co:0.01％， Zr:0.001％， Ca:0.002％， を含有し、残り:Niおよび不可避不純物からなる組成
（以上、重量％）を有し、厚さ:25mmからなるＢ含有Ni
基耐熱合金板を用意した。First, it contains C: 0.08%, Cr: 21.9%, Mo: 9.0%, B: 50ppm, and further Fe: 18.5%, W: 0.45%, Mn: 0.9%, Si: 0.3%, Al: 0.01. %, Ti: 0.01%, Co: 0.01%, Zr: 0.001%, Ca: 0.002%, and the rest: has a composition consisting of Ni and unavoidable impurities (above, weight%), thickness: from 25 mm B containing Ni
A base heat-resistant alloy plate was prepared.
このＢ含有Ni基耐熱合金板を、温度:1000℃,1050℃,1
100℃,1125℃,1150℃,1200℃,1250℃，の各温度で、そ
れぞれ大気中、24時間保持の熱処理を行い、上記Ｂ含有
Ni基耐熱合金板表面より2mm内部におけるＢ量を測定
し、Ｂ量を縦軸に、温度を横軸にとり、グラフに表し
て、その結果を第１図に示した。This B-containing Ni-base heat-resistant alloy plate was heated at a temperature of 1000 ° C, 1050 ° C,
At each temperature of 100 ℃, 1125 ℃, 1150 ℃, 1200 ℃, 1250 ℃, each heat treatment in the air for 24 hours, containing B
The B content within 2 mm from the surface of the Ni-base heat-resistant alloy plate was measured, and the B content was plotted on the vertical axis and the temperature was plotted on the horizontal axis, and the results are shown in a graph. The results are shown in FIG.
第１図の結果から、温度:1125℃より高い温度では、
高温になるほどＢ量は、低減し、一方、温度:1125℃以
下ではＢ量はほとんど無視できる程度の減少変化である
ことがわかる。これは、Ｂ量の変化は、炭化物の熱的安
定性と深く関わっており、炭化物が安定な熱処理条件で
は、Ｂは主として炭化物中に一構成元素として取込めら
れるため、Ｂ量の変化は小さいが、炭化物が固溶するよ
うな高温での熱処理条件では、Ｂは比較的速い速度で外
表面に拡散し、そこで外部の酸素と何らかの酸化物を形
成し、Ni基耐熱合金板の外にＢは逸散すると推測され、
後者の場合は、高温ほどＢの逸散は速いものと考えられ
る。From the results in FIG. 1, at temperatures higher than 1125 ° C.,
It can be seen that the B amount decreases as the temperature increases, while the B amount is a negligible decrease at a temperature of 1125 ° C. or less. This is because the change in the amount of B is deeply related to the thermal stability of the carbide, and under a heat treatment condition in which the carbide is stable, the change in the amount of B is small because B is mainly taken up as one constituent element in the carbide. However, under heat treatment conditions at a high temperature at which carbides form a solid solution, B diffuses at a relatively high rate to the outer surface, where it forms some oxides with external oxygen, leaving B outside the Ni-base heat-resistant alloy plate. Is presumed to escape,
In the latter case, it is considered that the higher the temperature, the faster the dissipation of B.
したがって、Ｂ含有Ni基耐熱合金の分塊鍛造温度、熱
間加工温度、中間焼鈍および最終熱処理の保持温度を、
従来よりも低い温度:1000〜1125℃に加熱保持しながら
加工することによりＢ含有量の減少は防止できるという
知見を得たのである。Therefore, the slab forging temperature of B-containing Ni-base heat-resistant alloy, hot working temperature, holding temperature of intermediate annealing and final heat treatment,
It has been found that a reduction in the B content can be prevented by processing while heating and holding at a temperature lower than conventional: 1000 to 1125 ° C.
この発明は、かかる知見にもとづいてなされたもので
あって、 C :0.04〜0.25％ Cr:20.0〜25.0％ Mo:8.0 〜10.0％ B :0.001〜0.1％ を必須成分組成として含有するＢ含有Ni基耐熱合金イン
ゴットを、分塊鍛造してビレットまたはスラブなどの加
工素材を作製し、この加工素材を熱間鍛造、熱間圧延な
どの熱間加工をしたのち、中間焼鈍、酸洗および冷間加
工を繰返すことにより小径線材、薄肉管または薄板を加
工し、さらに最終熱処理する方法において、 上記分塊鍛造、熱間加工、中間焼鈍および最終熱処理
を、温度:1000〜1125℃で行うＢ含有Ni基耐熱合金の塑
性加工方法に特徴を有するものである。The present invention has been made on the basis of the above findings, and includes: B: Ni containing C: 0.04 to 0.25% Cr: 20.0 to 25.0% Mo: 8.0 to 10.0% B: 0.001 to 0.1% as an essential component composition The base heat-resistant alloy ingot is subjected to bulk forging to produce a work material such as a billet or a slab, and this work material is subjected to hot working such as hot forging and hot rolling, followed by intermediate annealing, pickling and cold working. A method of processing a small-diameter wire rod, a thin-walled tube or a thin plate by repeating processing, and further performing a final heat treatment, wherein the above-described forging, hot working, intermediate annealing, and final heat treatment are performed at a temperature of 1000 to 1125 ° C. It is characterized by the plastic working method of the base heat-resistant alloy.
上記Ｂ含有Ni基耐熱合金においては、温度:1125℃よ
り高温度では、炭化物の安定性が悪く、合金素地中に固
溶したＢは、外表面に比較的大きな速度で拡散し逸散す
る。そのため、加工に伴う熱処理温度は、1125℃以下が
好ましいが、一方、1000℃より低温では、続く塑性加工
を行うための十分な軟化が得られず加工中の割れ原因に
なる。したがって、上記Ｂ含有Ni基耐熱合金の熱処理温
度および塑性加工温度は、1000〜1125℃が好ましい。In the above-mentioned B-containing Ni-base heat-resistant alloy, at a temperature higher than 1125 ° C., the stability of the carbide is poor, and B dissolved in the alloy base material diffuses and escapes to the outer surface at a relatively high speed. Therefore, the heat treatment temperature during the processing is preferably 1125 ° C. or lower, but if the temperature is lower than 1000 ° C., sufficient softening for performing the subsequent plastic working cannot be obtained, which causes cracking during the processing. Therefore, the heat treatment temperature and the plastic working temperature of the B-containing Ni-base heat-resistant alloy are preferably 1000 to 1125 ° C.
この発明のＢ含有Ni基耐熱合金の必須成分を上記の如
く限定した理由は、次の通りである。The reasons for limiting the essential components of the B-containing Ni-base heat-resistant alloy of the present invention as described above are as follows.
Ｃは、合金の素地を強化すると共に、Mo,Cr,その他の
炭化物形成元素と熱的安定性の高い炭化物を形成し、さ
らにＢを炭化物中に取込み、熱処理によるＢ逸散防止上
重要な元素であるが、その含有量が0.04重量％未満では
所望の効果が得られず、一方、0.25重量％を越えて含有
しても熱間加工性の劣化や高温強度を損うので好ましく
ない。したがって、上記Ｂ含有Ni基耐熱合金におけるＣ
含有量は0.04〜0.25重量％に定めた。C strengthens the base material of the alloy, forms carbides with high thermal stability with Mo, Cr, and other carbide-forming elements, further incorporates B into carbides, and is an important element in preventing B from escaping due to heat treatment. However, if the content is less than 0.04% by weight, the desired effect cannot be obtained. On the other hand, if the content exceeds 0.25% by weight, the hot workability is deteriorated and the high-temperature strength is impaired. Therefore, C in the above B-containing Ni-base heat-resistant alloy
The content was set to 0.04 to 0.25% by weight.
Crは、高温耐酸化性の向上や、炭化物の構成元素とし
て重要であるが、その含有量が20.0重量％未満では十分
な効果が得られず、一方、25.0重量％を越えて添加する
と、かえって機械的強度および加工性を劣化させるので
好ましくない。したがってCr含有量は、20.0〜25.0重量
％に定めた。Cr is important as an improvement in high-temperature oxidation resistance and as a constituent element of carbides. However, if its content is less than 20.0% by weight, sufficient effects cannot be obtained. It is not preferable because it deteriorates mechanical strength and workability. Therefore, the Cr content was determined to be 20.0 to 25.0% by weight.
Moは、高温強度を高めるのに有用であり、また炭化物
の主たる構成元素としても重要であるが、その含有量が
8.0重量％未満では十分な効果が得られず、一方、10.0
重量％を越えて含有すると熱間および冷間加工時に割れ
が発生しやすいので好ましくない。したがって、Mo含有
量は8.0〜10.0重量％に定めた。Mo is useful for increasing the high-temperature strength, and is also important as a main constituent element of carbides.
If the content is less than 8.0% by weight, a sufficient effect cannot be obtained.
If the content exceeds 10% by weight, cracks are likely to occur during hot and cold working, which is not preferable. Therefore, the Mo content is set to 8.0 to 10.0% by weight.
Ｂは、高温強度および延性を保持するために有用な元
素であるが、その含有量が、0.001重量％未満では所望
の効果が得られず、一方、0.1重量％を越えて添加する
と熱間加工性や溶接性を損うので好ましくない。したが
って、Ｂ含有量は0.001〜0.1重量％に定めた。B is an element useful for maintaining high-temperature strength and ductility. However, if the content is less than 0.001% by weight, the desired effect cannot be obtained. It is not preferable because the properties and weldability are impaired. Therefore, the B content is set to 0.001 to 0.1% by weight.
なお、Nb,TaおよびHfは、Cr,Moと同じ様な効果を有す
るので、Nb,TaおよびHfのうち１種または２種以上を合
計で５重量％以下添加すると、Ｂの逸散防止にはさらに
有効である。しかしながら上記Nb,TaおよびHfのうち１
種または２種以上の合計が５重量％を越えて含まれると
加工中に割れが発生するので好ましくない。Since Nb, Ta and Hf have the same effect as Cr and Mo, if one or more of Nb, Ta and Hf are added in a total of 5% by weight or less, the escape of B is prevented. Is more effective. However, one of the above Nb, Ta and Hf
If the total amount of the seeds or two or more kinds exceeds 5% by weight, cracks occur during processing, which is not preferable.
つぎに、この発明を実施例にもとづいて具体的に説明
する。Next, the present invention will be specifically described based on embodiments.
実施例 １ 20kg型の誘導真空溶解炉により溶解し、鋳造して、 C :0.10％， Cr:22.0％， B :0.0080％， Mo:9.2％， W :0.7％， Mn:0.7％， Si:0.4％， Fe:17.5％， Al:0.02％， Ti:0.04％， Co:0.02％， Zr:0.005％， Ca:0.003％， を含有し、残りNiおよび不可避不純物からなる組成（以
上、重量％）を有するＢ含有Ni基耐熱合金インゴットを
作製した。Example 1 A 20 kg induction vacuum melting furnace was used for melting and casting, and C: 0.10%, Cr: 22.0%, B: 0.0080%, Mo: 9.2%, W: 0.7%, Mn: 0.7%, Si: Composition containing 0.4%, Fe: 17.5%, Al: 0.02%, Ti: 0.04%, Co: 0.02%, Zr: 0.005%, Ca: 0.003%, and the balance of Ni and unavoidable impurities ) To produce a B-containing Ni-based heat-resistant alloy ingot.
このインゴットを、温度:1125℃で分塊鍛造し、厚さ:
15mmのスラブを作製した。このスラブを温度:1100℃で
熱間圧延して厚さ:7mm板にし、上記厚さ:7mmの板を温
度:1050℃30分保持後水冷の中間焼鈍を施したのち酸洗
し、冷間圧延して厚さ:4mmの薄板を作製し、上記薄板を
温度:1000℃20分保持後水冷の中間焼鈍−酸洗−冷間圧
延の工程を３回繰返して最終的に厚さ:0.5mmの薄板を作
製し、さらに温度:1100℃20分保持の最終熱処理を施し
た。This ingot is forged at a temperature of 1125 ° C and has a thickness of:
A 15 mm slab was produced. The slab is hot-rolled at a temperature of 1100 ° C. to a thickness of 7 mm, and the plate having a thickness of 7 mm is maintained at a temperature of 1050 ° C. for 30 minutes, subjected to a water-cooled intermediate annealing, then pickled, and then cold-washed. Rolling to produce a thin plate having a thickness of 4 mm, holding the above-mentioned thin plate at a temperature of 1000 ° C. for 20 minutes, and repeating a process of water-cooled intermediate annealing-pickling-cold rolling three times to finally obtain a thickness of 0.5 mm And a final heat treatment at a temperature of 1100 ° C. for 20 minutes was performed.
このようにして得られた厚さ:0.5mmの薄板のＢ含有量
を測定したところ、B:0.0079重量％で、上記インゴット
のＢ含有量とほとんど変らず、加工中におけるＢの逸散
はほとんど見られないことがわかる。When the B content of the thus obtained thin plate having a thickness of 0.5 mm was measured, the content of B was 0.0079% by weight, which was almost the same as the B content of the ingot. It turns out that it cannot be seen.
この発明によると、重量％で、 C :0.04〜0.25％， Cr:20.0〜25.0％， Mo:8.0 〜10.0％， B :0.001〜0.1％， を必須成分として含有するＢ含有Ni基耐熱合金をＢが逸
散することなく大気中で塑性加工することができるの
で、安定して目標のＢ含有量を有するＢ含有Ni基耐熱合
金細線材、薄板、薄肉管などの素材を製造することがで
き、Ｂ含有量の不足に伴う不良素材の発生が皆無になる
などのすぐれた効果を奏するものである。According to the present invention, a B-containing Ni-based heat-resistant alloy containing, as essential components, C: 0.04 to 0.25%, Cr: 20.0 to 25.0%, Mo: 8.0 to 10.0%, and B: 0.001 to 0.1% by weight. Since B can be plastically processed in the air without dissipating, it is possible to stably produce materials containing B-containing Ni-based heat-resistant alloys having a target B content, such as fine wires, thin plates, and thin-walled tubes. In addition, there is an excellent effect that no defective material is generated due to the shortage of the B content.
第１図は、大気中熱処理温度と表面Ｂ含有量の関係を示
すグラフである。FIG. 1 is a graph showing the relationship between the air heat treatment temperature and the surface B content.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２２Ｆ 1/00 ６５０ 8719−4Ｋ Ｃ２２Ｆ 1/00 ６５０Ａ ６８６ 8719−4Ｋ ６８６Ｂ ６９１ 8719−4Ｋ ６９１Ｂ ６９３ 8719−4Ｋ ６９３Ａ ６９４ 8719−4Ｋ ６９４Ｂ (56)参考文献 特開 昭62−40336（ＪＰ，Ａ) 特開 昭63−149361（ＪＰ，Ａ) 特開 昭52−148416（ＪＰ，Ａ) 特開 平２−247366（ＪＰ，Ａ) 特開 平２−247367（ＪＰ，Ａ)──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location C22F 1/00 650 8719-4K C22F 1/00 650A 686 8719-4K 686B 691 8719-4K 691B 693 8719 -4K 693A 694 8719-4K 694B (56) References JP-A-62-40336 (JP, A) JP-A-63-149361 (JP, A) JP-A-52-148416 (JP, A) -247366 (JP, A) JP-A-2-24767 (JP, A)
Claims (1)
トを、分塊鍛造してビレットまたはスラブなどの加工素
材を作製し、この加工素材を熱間鍛造、熱間圧延などの
熱間加工をしたのち、中間焼鈍、酸洗および冷間加工を
繰返すことにより小径線材、薄肉管または薄板を加工
し、さらに最終熱処理する方法において、 上記分塊鍛造、熱間加工、中間焼鈍および最終熱処理
を、温度:1000〜1125℃で行うことを特徴とするＢ含有N
i基耐熱合金の塑成加工方法。(1) As essential components, C: 0.04 to 0.25%, Cr: 20.0 to 25.0%, Mo: 8.0 to 10.0%, B: 0.001 to 0.1% obtained by melting and casting. B-containing Ni-based heat-resistant alloy ingot to be included, to produce a working material such as a billet or slab by forging, hot working such as hot forging, hot rolling, then intermediate annealing, A method of processing a small-diameter wire rod, a thin-walled tube or a thin plate by repeating pickling and cold working, and further performing a final heat treatment, wherein the bulk forging, hot working, intermediate annealing, and final heat treatment are performed at a temperature of 1000 to 1125 ° C. B-containing N characterized by being carried out at
i-base heat-resistant alloy forming method.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1068868A JP2722628B2 (en) | 1989-03-20 | 1989-03-20 | Plastic working method for B-containing Ni-base heat-resistant alloy |
| US07/495,290 US5019179A (en) | 1989-03-20 | 1990-03-19 | Method for plastic-working ingots of heat-resistant alloy containing boron |
| EP90105246A EP0388892B1 (en) | 1989-03-20 | 1990-03-20 | Method for plastic-working ingots of heat-resistant alloy containing boron |
| DE69013192T DE69013192T2 (en) | 1989-03-20 | 1990-03-20 | Process for the plastic deformation of blocks made of heat-resistant boron-containing alloy. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1068868A JP2722628B2 (en) | 1989-03-20 | 1989-03-20 | Plastic working method for B-containing Ni-base heat-resistant alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02247365A JPH02247365A (en) | 1990-10-03 |
| JP2722628B2 true JP2722628B2 (en) | 1998-03-04 |
Family
ID=13386064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1068868A Expired - Lifetime JP2722628B2 (en) | 1989-03-20 | 1989-03-20 | Plastic working method for B-containing Ni-base heat-resistant alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2722628B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5026686B2 (en) * | 2005-09-26 | 2012-09-12 | 日本冶金工業株式会社 | Ni-base alloy material excellent in workability and high-temperature strength and method for producing the same |
| JP6826329B2 (en) * | 2017-06-30 | 2021-02-03 | 日立金属株式会社 | Manufacturing method of Ni-based super heat-resistant alloy wire and Ni-based super heat-resistant alloy wire |
| CN115125339A (en) * | 2022-07-15 | 2022-09-30 | 丹阳市海威电热合金有限公司 | Ultra-high temperature nickel-based alloy and preparation method thereof |
| CN117535559B (en) * | 2024-01-10 | 2024-05-07 | 北京北冶功能材料有限公司 | Low-density nickel-based high-temperature alloy foil and preparation method and application thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS559940A (en) * | 1978-07-05 | 1980-01-24 | Matsushita Electric Ind Co Ltd | Washable furniture |
| JPS6240336A (en) * | 1985-08-13 | 1987-02-21 | Mitsubishi Metal Corp | Ni-fe-cr alloy sheet material superior in cold formability and its manufacture |
| JPS63149361A (en) * | 1986-12-11 | 1988-06-22 | Nippon Yakin Kogyo Co Ltd | Manufacture of iron-nickel alloy |
-
1989
- 1989-03-20 JP JP1068868A patent/JP2722628B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02247365A (en) | 1990-10-03 |
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