JP2020530064A - Corrosion resistant alloy - Google Patents
Corrosion resistant alloy Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
Abstract
【課題】高活性な酸化環境で使用されるニッケル基合金であって、５５０℃−６２５℃の温度範囲で高い塑性特性を有し、６５０℃の温度でKCl、 AlCl3+ (ZrCl4HfCl4)などの塩化物溶融中での腐食割れに対する耐性を有する。【解決手段】炭素、シリコン、マンガン、クロム、モリブデン、リン、硫黄、鉄、ニッケルおよび不可避不純物に、さらにチタン、アルミニウム、ニオブ、マグネシウムが追加され、重量％で次の組成比からなる合金。炭素：≦０．００６、シリコン：≦０．１、マンガン：≦１．０、クロム：２２．８−２４．０、鉄：≦０．７５、モリブデン：１２．０−１４．０、ニオブ：０．０１−０．０３、チタン：０．０１−０．０６、アルミニウム：０．１−０．２、マグネシウム：０．００５−０．０１、リン：≦０．０１５、硫黄：≦０．０１２、ニッケル及び不可避的不純物：残部。また、クロム、モリブデン及び鉄の含有量の比率が、次の条件を満たす。【数１５】また、ニオブ及び炭素の含有量の比率が、次の条件を満たす。【数１６】【選択図】なしPROBLEM TO BE SOLVED: To provide a nickel-based alloy used in a highly active oxidizing environment, having high plastic properties in a temperature range of 550 ° C.-625 ° C., and chlorides such as KCl and AlCl3 + (ZrCl4HfCl4) at a temperature of 650 ° C. Has resistance to corrosion cracking during melting. SOLUTION: An alloy in which titanium, aluminum, niobium and magnesium are further added to carbon, silicon, manganese, chromium, molybdenum, phosphorus, sulfur, iron, nickel and unavoidable impurities, and the composition ratio is as follows in% by weight. Carbon: ≤0.006, Silicon: ≤0.1, Manganese: ≤1.0, Chromium: 22.8-24.0, Iron: ≤0.75, Molybdenum: 12.0-14.0, Niob: 0.01-0.03, titanium: 0.01-0.06, aluminum: 0.1-0.2, magnesium: 0.005-0.01, phosphorus: ≤0.015, sulfur: ≤0. 012, nickel and unavoidable impurities: balance. Further, the ratio of the contents of chromium, molybdenum and iron satisfies the following conditions. [Equation 15] Further, the ratio of the contents of niobium and carbon satisfies the following conditions. [Number 16] [Selection diagram] None
Description
本発明は、冶金の技術に関し、特に、活性の高い酸化環境で使用されるニッケルベース合金（nickel-based alloys）に関する。 The present invention relates to metallurgical techniques, in particular to nickel-based alloys used in highly active oxidizing environments.
耐食性合金である Nicrofer 6616 hMo 合金 С-4 (No.2.4610)は、重量％が、１
４．５−１７．５のＣｒ、１４．０−１７．０のＭｏ、≦３．０（３．０ｗｔ％以下を示す。他も同様）のＦｅ、≦０．００９のС、≦１．０のＭｎ、≦０．０５のＳｉ、≦２．０のＣｏ、 ≦０、７のＴｉ、≦０．０２０のＰ、≦０．０１０のＳ、およびニッケルと他の不可避的不純物とからなる(非特許文献１参照)。
Nicrofer 6616 hMo alloy С-4 (No.2.4610), which is a corrosion-resistant alloy, has a weight% of 1
Cr of 4.5-17.5, Mo of 14.0-17.0, Fe of ≤3.0 (showing 3.0 wt% or less; the same applies to others), С of ≤0.009, ≤1. It consists of Mn of 0, Si of ≤0.05, Co of ≤2.0, Ti of ≤0,7, P of ≤0.020, S of ≤0.010, and nickel and other unavoidable impurities. (See Non-Patent Document 1).
このような合金は、室温および高温で、化学環境の幅広い範囲で稼働する機器の製造に使用され、特に、排煙脱硫装置で吸着剤として、またはエッチング浴槽や酸回収プラント、酢酸および農薬の生産プラントにおいて用いられる。 Such alloys are used in the manufacture of equipment that operates in a wide range of chemical environments at room temperature and high temperature, especially as adsorbents in flue gas desulfurization equipment, or in etching baths and acid recovery plants, acetic acid and pesticide production. Used in plants.
本発明に最も近い類似物は、合金ХН６５ＭＢУ(ЭП７６０)であり、重量％で、≦０．０２のС、≦０.１のＳｉ、≦１.０のＭｎ、１４.５−１６.５のＣｒ、１５.０ −１７.０のＭｏ、３.０−４.５のＷ、≦０.５のＦｅ、≦０.０１２のＳ、≦０.０１５のＰ、およびニッケルと他の不可避的不純物からなる（ＧＯＳＴ規格５６３２-２０１４−プロトタイプ）。 The closest analog to the present invention is the alloy ХН65MBУ (ЭП760) of С of ≤0.02, Si of ≤0.1, Mn of ≤1.0, 14.5-16.5 by weight%. Cr, 15.0-17.0 Mo, 3.0-4.5 W, ≤0.5 Fe, ≤0.012 S, ≤0.015 P, and nickel and other inevitable Consists of impurities (GOST standard 5632-2014 prototype).
この合金は、−７０〜５００℃の温度範囲で、化学産業、石油化学産業(酢酸、エポキシ樹脂、酢酸ビニル、メラミン、複合有機化合物の生産）、およびその他の産業で、高活性なレドックス（酸化還元）環境で動作する溶接構造体(カラム（column）、熱交換器、原子炉)の製造に使用される。 This alloy has a highly active redox (oxidation) in the chemical industry, petrochemical industry (production of acetic acid, epoxy resin, vinyl acetate, melamine, composite organic compounds), and other industries in the temperature range of -70 to 500 ° C. Used in the manufacture of welded structures (columns, heat exchangers, reactors) that operate in a (reduction) environment.
上記合金ХН６５ＭＢУとその溶接継手は、ＫＣｌ−ＡｌＣｌ3−ＺｒＣｌ4の媒体内では５００℃までしか使用できない。その温度を超えると、当該合金は、粒界腐食と腐食割れが起こるだけでなく、その伸び率が、５５０℃では、４８％から７.３-１３％に急激に低下し、６２５℃では、さらに２．５％にまで低下し、変形が加えられると金属脆化が現出するからである。 The alloy ХН65MBУ and its welded joints can only be used up to 500 ° C. in the medium of KCl-AlCl 3- ZrCl 4 . Above that temperature, the alloy not only undergoes intergranular corrosion and corrosion cracking, but its elongation sharply drops from 48% to 7.3-13% at 550 ° C and at 625 ° C. This is because it further decreases to 2.5%, and metal embrittlement appears when deformation is applied.
本発明が対象とする目標は、塩化物プラントにおける作用媒体(ＫＣｌ−ＡｌＣｌ3−ＺｒＣｌ4)でТ＝６５０℃の温度までに耐える高レベルの腐食特性を備えた合金を製造することである。また本発明の技術的結果は、５５０℃〜６２５℃の温度範囲での動作中に高レベルの塑性特性（plastic properties）を有し、６５０℃までの温度でＫＣｌ、ＡｌＣｌ3＋（ＺｒＣｌ4 ＨｆＣｌ4）などの塩化溶融物内において、腐食割れに対する耐性が向上した合金を取得することである。 An object of the present invention is to produce an alloy with a high level of corrosive properties that can withstand temperatures up to Т = 650 ° C. in a working medium (KCl-AlCl 3- ZrCl 4 ) in a chloride plant. The technical result of the present invention has a high level of plastic properties (plastic properties) during operation in the temperature range of 550 ℃ ~625 ℃, KCl at temperatures up to 650 ℃, AlCl 3 + (ZrCl 4 HfCl It is to obtain an alloy with improved resistance to corrosion cracking in the chloride melt such as 4 ).
上述の技術的効果は、炭素、シリコン、マンガン、クロム、モリブデン、リン、硫黄、鉄、ニッケルおよび不可避的不純物を含む合金が、さらに本発明に従って、チタン、アルミニウム、ニオブ、マグネシウムを以下の重量％で示す構成比で含むことで達成される。 The technical effects described above are alloys containing carbon, silicon, manganese, chromium, molybdenum, phosphorus, sulfur, iron, nickel and unavoidable impurities, and titanium, aluminum, niobium, magnesium in the following weight% according to the present invention. It is achieved by including the composition ratio shown by.
炭素 ≦０．００６
シリコン ≦０．１
マンガン ≦１．０
クロム ２２．８−２４．０
鉄 ≦０．７５
モリブデン １２．０−１４．０
ニオブ ０．０１−０．０３
チタン ０．０１−０．０６
アルミニウム ０．１−０．２
マグネシウム ０．００５−０．０１
リン ≦０．０１５
硫黄 ≦０．０１２
ニッケル及び不可避的不純物 残部（balance）
Carbon ≤ 0.006
Silicon ≤ 0.1
Manganese ≤ 1.0
Chromium 22.8-24.0
Iron ≤ 0.75
Molybdenum 12.0-14.0
Niobium 0.01-0.03
Titanium 0.01-0.06
Aluminum 0.1-0.2
Magnesium 0.005-0.01
Phosphorus ≤ 0.015
Sulfur ≤ 0.012
Nickel and unavoidable impurities balance
本発明で提案される合金中の元素の含有比率は、請求される包括的な技術結果を得ることができるため最適である。上記元素の含有比率が満たされないと、合金の特性が低下して、特性の不安定性が観察され、複合的な効果を得ることができない。 The elemental content ratios in the alloys proposed in the present invention are optimal because they provide the comprehensive technical results claimed. If the content ratio of the above elements is not satisfied, the characteristics of the alloy are deteriorated, the instability of the characteristics is observed, and a combined effect cannot be obtained.
本発明の実施の形態に係る合金は、炭素（炭素）、シリコン、マンガン、クロム、モリブデン、リン、硫黄、鉄、ニッケルおよび不可避的不純物に加えて、さらにチタン、アルミニウム、ニオブ、マグネシウムを以下の重量％で示す構成比で含む。 The alloy according to the embodiment of the present invention further contains titanium, aluminum, niobium, and magnesium in addition to carbon, silicon, manganese, chromium, molybdenum, phosphorus, sulfur, iron, nickel, and unavoidable impurities. Included in the composition ratio shown in% by weight.
炭素 ≦０．００６
シリコン ≦０．１
マンガン ≦１．０
クロム ２２．８−２４．０
鉄 ≦０．７５
モリブデン １２．０−１４．０
ニオブ ０．０１−０．０３
チタン ０．０１−０．０６
アルミニウム ０．１−０．２
マグネシウム ０．００５−０．０１
リン ≦０．０１５
硫黄 ≦０．０１２
ニッケル及び不可避的不純物 残りの量（balance）
さらに、安定した構造と可塑特性を得るためには、クロム、モリブデン及び鉄の含有量は以下の比率で関係していることが望ましい：
Carbon ≤ 0.006
Silicon ≤ 0.1
Manganese ≤ 1.0
Chromium 22.8-24.0
Iron ≤ 0.75
Molybdenum 12.0-14.0
Niobium 0.01-0.03
Titanium 0.01-0.06
Aluminum 0.1-0.2
Magnesium 0.005-0.01
Phosphorus ≤ 0.015
Sulfur ≤ 0.012
Nickel and unavoidable impurities Remaining amount (balance)
Furthermore, in order to obtain stable structure and plastic properties, it is desirable that the contents of chromium, molybdenum and iron are related in the following ratios:
（クロムとモリブデンの総含有重量％と鉄の重量％の比率は４６．４以上）
さらに、安定した構造と高レベルの腐食特性を得るためには、ニオブと炭素の含有量は以下の比率で関係していることが望ましい：
(The ratio of the total weight% of chromium and molybdenum to the weight% of iron is 46.4 or more)
Furthermore, in order to obtain a stable structure and high levels of corrosive properties, it is desirable that the niobium and carbon contents are related in the following ratios:
（ニオブと炭素の重量％の比率は１．６６以上）
さらに、クロム、モリブデン、鉄、ニオブ、および炭素の含有量は以下の比率で関係していることが望ましい：
(The ratio of niobium to carbon by weight is 1.66 or more)
In addition, the contents of chromium, molybdenum, iron, niobium, and carbon should be related in the following ratios:
かつ、 And,
プロトタイプと比較分析すると、本発明に係る合金は、公知の合金と比べて、０．０１−０．０３％（％は重量％を意味する。他も同様）のニオブ、０．０１−０．０６％のチタン、０．１−０．２％のアルミニウム、０．００５−０．０１％のマグネシウムが追加されていると共に、炭素（≦０．０２％に代えて、≦０．００６％)、とモリブデン (１５．０−１７、０％に代えて、１２、０−１４．０％)の含有量を低くし、クロム (１４．５−１６％に代えて、２３．０-２４．０％)、と鉄 (≦０．５％に代えて≦０．７５％)の含有量を増加し、タングステンは含まれていないことが分かる。 When compared with the prototype, the alloy according to the present invention has 0.01-0.03% (% means% by weight; the same applies to others) of niobium, 0.01-0. 06% titanium, 0.1-0.2% aluminum, 0.005-0.01% magnesium added and carbon (≤0.006% instead of ≤0.02%) , And molybdenum (12, 0-14.0% instead of 15.0-17, 0%), and chromium (14.5-16% instead of 23.0-24.). The contents of 0%) and iron (≤0.75% instead of ≤0.5%) are increased, and it can be seen that tungsten is not contained.
さらに、特定の場合では、元素の含有量の比率が次式を満たしている： Furthermore, in certain cases, the ratio of elemental content satisfies the following equation:
または、 Or
あるいは、 Or
かつ、 And,
本発明に係る合金における合金元素の含有量の範囲の制限は様々な組成の合金の特性を研究した結果として確立された。 Limitations on the range of alloy element content in the alloys of the present invention have been established as a result of studying the properties of alloys of various compositions.
炭素含有量が０．００６％を超えると、高温での炭化物形成プロセスの増加（望ましくない炭化物相の出現）により、ジルコニウムおよびハフニウム塩の溶液の耐食性が低下する。 When the carbon content exceeds 0.006%, the corrosion resistance of the zirconium and hafnium salt solutions is reduced due to the increased carbide formation process at high temperatures (the appearance of unwanted carbide phases).
ハフニウムおよびジルコニウム酸化物に必要な耐熱性を確保するために、クロム含有量は２２．８−２４．０％の範囲であることが判明した。 In order to ensure the heat resistance required for hafnium and zirconium oxides, the chromium content was found to be in the range of 22.8-24.0%.
クロムが２２．８％未満の量で合金に含有されると、必要な耐熱性が確保されず、２４．０％を超える含有量を超えると、合金の耐熱性が損なわれる。 If the amount of chromium is less than 22.8% in the alloy, the required heat resistance is not ensured, and if the content exceeds 24.0%, the heat resistance of the alloy is impaired.
ニッケル合金にモリブデンを導入すると、固溶体の再結晶温度が上昇して、その軟化を抑制し、耐熱性が上昇して、短期および長期試験中における蘇生特性が向上する。 Introducing molybdenum into a nickel alloy raises the recrystallization temperature of the solid solution, suppresses its softening, increases heat resistance, and improves resuscitation properties during short-term and long-term tests.
１２．０−１４．０％のモリブデン含有量の範囲は、短期および長期の負荷と高温の両方に必要な機械的特性を提供するために選択される。 The range of 12.0-14.0% molybdenum content is selected to provide the mechanical properties required for both short-term and long-term loads and high temperatures.
１２．０％未満のモリブデンの含有量では、機械的特性は満たされず、含有量が１４．０％を超えると、塑性特性が低下し、それに応じて冶金処理中の合金の加工性が低下する。 If the molybdenum content is less than 12.0%, the mechanical properties are not satisfied, and if the content exceeds 14.0%, the plastic properties are lowered, and the workability of the alloy during the metallurgical treatment is lowered accordingly. ..
０．０１−０．０３％のニオブは、残留炭素と窒素を結合して、炭化物や窒化物、炭窒化物を生成し、粒界に沿ったクロム炭化物と炭窒化物の形成を抑制する。 0.01-0.03% niobium combines residual carbon and nitrogen to form carbides, nitrides and carbonitrides, suppressing the formation of chromium carbides and carbonitrides along the grain boundaries.
合金中の炭素含有量の６〜１０倍の量のニオブを添加すると、合金の粒間腐食がなくなり、溶接部が破壊されるのを防ぐ。 Adding niobium in an amount of 6 to 10 times the carbon content in the alloy eliminates intergranular corrosion of the alloy and prevents the weld from breaking.
ニオブの含有量が、０．０１％未満の場合、残留炭素との相互作用は非効率的であり、ニオブの含有量が０．０３％を超えると、炭化物の形成に適していない。 When the niobium content is less than 0.01%, the interaction with residual carbon is inefficient, and when the niobium content exceeds 0.03%, it is not suitable for the formation of carbides.
シリコン含有量が０．１％を超えると、シリコンケイ酸塩の含有量の増加により合金の脆化を惹起するだけでなく、合金の加工性に悪影響を与える。 When the silicon content exceeds 0.1%, the increase in the silicon silicate content not only causes embrittlement of the alloy, but also adversely affects the processability of the alloy.
マンガン含有量が１．０％を超えると、共晶溶融が出現し、加圧処理中にインゴット（ingot）が破壊され、合金の耐熱性が低下するだけでなく、局所的な耐食性が低下する。 When the manganese content exceeds 1.0%, eutectic melting appears and the ingot is destroyed during the pressure treatment, which not only reduces the heat resistance of the alloy, but also reduces the local corrosion resistance. ..
ニッケルは、ＨＣｌ内で、その沸点でさえ安定している。しかし、塩化物、Ｆｅ(III)イオンおよび別の酸化物の存在下においては、ニッケルおよびニッケルクロムモリブデン合金の腐食が強くなる。そのため、鉄含有量が０．７５％以下に制限されている。 Nickel is stable in HCl, even at its boiling point. However, in the presence of chlorides, Fe (III) ions and other oxides, nickel and nickel-chromium molybdenum alloys become more corrosive. Therefore, the iron content is limited to 0.75% or less.
チタンを、０．０１−０．０６％の量で含ませると、ジルコニウムおよびハフニウム塩の溶融物の耐食性が向上し、残留炭素が炭化物に結合し、５００−７００℃の動作温度での耐熱性に積極的に貢献するＮｉ３Ｔｉタイプの金属間化合物が十分な量形成されます。 Inclusion of titanium in an amount of 0.01-0.06% improves the corrosion resistance of the zirconium and hafnium salt melts, residual carbon bonds to the carbides and heat resistance at operating temperatures of 500-700 ° C. A sufficient amount of Ni3Ti type intermetallic compound is formed that positively contributes to.
チタン含有量が０．０１％未満の場合、耐食性の要件が満たされず、０．０６％を超えるとチタン含有量が過剰になり、合金の加工性が低下し、反応性により望ましくない相が形成される。 If the titanium content is less than 0.01%, the corrosion resistance requirement is not met, and if it exceeds 0.06%, the titanium content becomes excessive, the processability of the alloy is reduced, and an undesired phase is formed due to reactivity. Will be done.
０．１−０．２％および０．００５−０．０１％の量のアルミニウムおよびマグネシウムが合金に導入されることにより、残留酸素が除去される、また、アルミニウムに関しては、合金の耐熱性に寄与するＮｉ３Ｔｉタイプの金属間化合物を形成する。 The introduction of 0.1-0.2% and 0.005-0.01% amounts of aluminum and magnesium into the alloy removes residual oxygen, and for aluminum, the heat resistance of the alloy. It forms a contributing Ni3Ti type intermetallic compound.
これらの元素が指定より少ない量で導入された場合、残留酸素の必要な除去は達成されない。これらの元素の含有量を超えると、粗っぽい非金属介在物が形成される。 If these elements are introduced in less than specified amounts, the required removal of residual oxygen will not be achieved. Exceeding the content of these elements forms coarse non-metallic inclusions.
硫黄含有量が０．０１２％を超え、リンが０．０１５％を超えると、合金の塑性特性に悪影響を及ぼす粗い非金属介在物が形成される。 When the sulfur content exceeds 0.012% and the phosphorus exceeds 0.015%, coarse non-metallic inclusions that adversely affect the plastic properties of the alloy are formed.
の条件について、当該比率が４６．４未満になると、合金構造の安定性が低下し（シグマ相が分離）、塑性特性と耐食性に悪影響を及ぼす。 If the ratio is less than 46.4, the stability of the alloy structure is lowered (sigma phase is separated), which adversely affects the plastic properties and corrosion resistance.
の条件について、当該比率が１．６６未満になると、合金の耐食性が劣化する。 When the ratio is less than 1.66, the corrosion resistance of the alloy deteriorates.
本発明で提案される合金中の元素の含有比率は、実験的に発見され、請求される包括的な技術結果を得ることができるため最適である。元素の含有比率を破ると、合金の特性が低下し、それらの不安定性が観察され、複合した効果が達成されない。 The elemental content ratios in the alloys proposed in the present invention are optimal because they provide the comprehensive technical results that are experimentally discovered and claimed. Breaking the elemental content will reduce the properties of the alloy, its instability will be observed and the combined effect will not be achieved.
以下、実施例について説明する。 Hereinafter, examples will be described.
合金インゴットは、真空誘導炉で製錬された。試験合金の塑性特性の変化のテストは、炉内で１０００時間以上の長時間保持の後、５５０℃および６２５℃の温度環境下で、ＧＯＳＴ規格１４０１９−２００３に従って、９０度およびそれ以上の角度までサンプルを屈折する方法で実行された。 The alloy ingot was smelted in a vacuum induction furnace. The test of the change in the plastic properties of the test alloy is carried out in a furnace for a long time of 1000 hours or more, and then in a temperature environment of 550 ° C and 625 ° C, according to GOST standard 14019-2003, up to an angle of 90 degrees and more. It was performed in a way that refracted the sample.
また、合金の腐食割れに対する耐久性のテストは、溶融塩化物ＫＣｌ、ＡｌＣｌ3＋（ＺｒＣｌ4 ＨｆＣｌ4）内で実行された。 Further, the durability of the test for corrosion cracking of the alloy, molten chlorides KCl, performed within AlCl 3 + (ZrCl 4 HfCl 4 ).
表１は、さまざまな組成比を有する合金インゴットの化学組成と、プロトタイプ合
金の化学組成を示す。
表２は、ＧＯＳＴ規格１４０１９−２００３に従って９０度の角度で曲げることに
より、表1に示す合金の塑性特性を試験した結果を示す。
表３は、表1に示した合金の溶融塩化物ＫＣｌ、ＡｌＣｌ3＋（ＺｒＣｌ4 ＨｆＣ
ｌ4）内に１００時間、T＝６５０℃で保持したときの工業用な腐食割れ耐性試験の結
果を示す。
Table 1 shows the chemical composition of alloy ingots with various composition ratios and the prototype combination.
Shows the chemical composition of gold.
Table 2 shows the bending at a 90 degree angle according to GOST standard 14019-2003.
The results of testing the plastic properties of the alloys shown in Table 1 are shown below.
Table 3, molten chlorides of alloys shown in Table 1 KCl, AlCl 3 + (ZrCl 4 HfC
Conclusion of an industrial corrosion cracking resistance test when held in l 4 ) for 100 hours at T = 650 ° C.
Show the fruit.
表１、２から分かるように、本発明の構成を満たす合金（合金１、２）の５５０℃および６２５℃における合金の塑性特性は、プロトタイプ合金の特性よりも高い。 As can be seen from Tables 1 and 2, the plastic properties of the alloys (alloys 1 and 2) satisfying the constitution of the present invention at 550 ° C. and 625 ° C. are higher than those of the prototype alloy.
合金３は、本発明の化学組成の条件を満たさないため、合金１，２よりも塑性特性が悪く、ＧＯＳＴ規格 １４０１９−２００３に準拠した曲げ試験の結果、亀裂（crack）が発生した。 Since the alloy 3 does not satisfy the conditions of the chemical composition of the present invention, the plastic properties are worse than those of the alloys 1 and 2, and as a result of the bending test conforming to the GOST standard 14019-2003, cracks are generated.
表３から分かるように、本発明の構成を満たす合金（合金１、２）の腐食速度は、プロトタイプ合金の腐食速度よりも低いため、外観検査ではプロトタイプ合金とは異なり、亀裂は視認できなかった。本発明の組成を満たさない合金３の腐食速度は、合金１、２の腐食速度を超えており（ただし、プロトタイプ合金の腐食速度よりも低い）、目視検査でサンプルに亀裂が見つかった。 As can be seen from Table 3, since the corrosion rate of the alloys (alloys 1 and 2) satisfying the constitution of the present invention is lower than the corrosion rate of the prototype alloy, the cracks could not be visually recognized unlike the prototype alloy in the visual inspection. .. The corrosion rate of the alloy 3 not satisfying the composition of the present invention exceeds the corrosion rate of the alloys 1 and 2 (however, it is lower than the corrosion rate of the prototype alloy), and a crack was found in the sample by visual inspection.
Claims (4)
チタン、アルミニウム、ニオブ、マグネシウムをさらに含み、重量％による組成比が、以下の通りであることを特徴とする耐食性ニッケル基合金。
炭素 ≦０．００６
シリコン ≦０．１
マンガン ≦１．０
クロム ２２．８−２４．０
鉄 ≦０．７５
モリブデン １２．０−１４．０
ニオブ ０．０１−０．０３
チタン ０．０１−０．０６
アルミニウム ０．１−０．２
マグネシウム ０．００５−０．０１
リン ≦０．０１５
硫黄 ≦０．０１２
ニッケル及び不可避的不純物 残部 There are corrosion resistant nickel-based alloys containing carbon, silicon, manganese, chromium, molybdenum, phosphorus, sulfur, iron, nickel, and unavoidable impurities.
A corrosion-resistant nickel-based alloy further containing titanium, aluminum, niobium, and magnesium, wherein the composition ratio by weight% is as follows.
Carbon ≤ 0.006
Silicon ≤ 0.1
Manganese ≤ 1.0
Chromium 22.8-24.0
Iron ≤ 0.75
Molybdenum 12.0-14.0
Niobium 0.01-0.03
Titanium 0.01-0.06
Aluminum 0.1-0.2
Magnesium 0.005-0.01
Phosphorus ≤ 0.015
Sulfur ≤ 0.012
Nickel and unavoidable impurities balance
かつ、ニオブおよび炭素の含有量の比率が、
And the ratio of niobium and carbon content is
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| RU2017127607A RU2672647C1 (en) | 2017-08-01 | 2017-08-01 | Corrosive-resistant alloy |
| RU2017127607 | 2017-08-01 | ||
| PCT/RU2017/001014 WO2019027347A1 (en) | 2017-08-01 | 2017-12-29 | Corrosion-resistant alloy |
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| JP2003027163A (en) * | 2001-06-28 | 2003-01-29 | Haynes Internatl Inc | TWO-STEP AGING TREATMENT FOR Ni-Cr-Mo ALLOY |
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