JP2000176679A - Alloy powder for high ductile build-up welding - Google Patents
Alloy powder for high ductile build-up weldingInfo
- Publication number
- JP2000176679A JP2000176679A JP10350448A JP35044898A JP2000176679A JP 2000176679 A JP2000176679 A JP 2000176679A JP 10350448 A JP10350448 A JP 10350448A JP 35044898 A JP35044898 A JP 35044898A JP 2000176679 A JP2000176679 A JP 2000176679A
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- mass
- alloy powder
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- alloy
- build
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- 239000000956 alloy Substances 0.000 title claims abstract description 66
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 66
- 239000000843 powder Substances 0.000 title claims abstract description 39
- 238000003466 welding Methods 0.000 title abstract description 11
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- 230000032683 aging Effects 0.000 claims abstract description 6
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 6
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 238000005253 cladding Methods 0.000 claims description 30
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 38
- 239000002184 metal Substances 0.000 abstract description 38
- 230000000694 effects Effects 0.000 description 11
- 238000001556 precipitation Methods 0.000 description 9
- 150000001247 metal acetylides Chemical class 0.000 description 8
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- 150000002910 rare earth metals Chemical class 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000007545 Vickers hardness test Methods 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 238000005552 hardfacing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高温で使用される
耐摩耗部品の摩耗面に肉盛溶接するための肉盛用合金粉
末に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cladding alloy powder for overlay welding to a wear surface of a wear-resistant part used at a high temperature.
【０００２】[0002]
【従来の技術】従来、部品の耐熱・耐摩耗性を向上する
方法として、肉盛用合金を肉盛溶接することによって要
部に耐熱・耐摩耗性に富む肉盛金属層を形成することが
行われている。肉盛金属層の耐摩耗性を向上するには肉
盛金属の硬さを高めることが有効である。ところで、高
温で使用される多くの部品は、運転サイクルにより、あ
るいは休転等により室温あるいは室温に近い温度まで冷
却されることがある。耐摩耗性を増強するため部品に肉
盛加工を施した場合、室温における肉盛金属の延性が低
いと、前記のような冷却時に熱応力により肉盛金属に割
れが発生し、肉盛金属が剥離したり部品が破損するなど
の不都合が生じることがある。そのため、耐熱・耐摩耗
用肉盛金属には室温附近の低い温度でも適度な延性が必
要となる。2. Description of the Related Art Conventionally, as a method for improving the heat resistance and abrasion resistance of a part, a build-up metal layer having a high heat resistance and abrasion resistance is formed on a main part by overlay welding of a cladding alloy. Is being done. In order to improve the wear resistance of the overlay metal layer, it is effective to increase the hardness of the overlay metal. By the way, many components used at a high temperature may be cooled down to room temperature or a temperature close to room temperature by an operation cycle or by a break. When the parts are overlaid to enhance wear resistance, if the ductility of the overlay metal at room temperature is low, cracks occur in the overlay metal due to thermal stress during cooling as described above, and the overlay metal is There may be inconveniences such as peeling or breakage of parts. Therefore, the overlay metal for heat and wear resistance needs to have appropriate ductility even at a low temperature near room temperature.
【０００３】耐熱・耐摩耗用途に対する肉盛用合金とし
て、しばしばＣｏ−Ｃｒ−Ｗ−Ｃ系合金が用いられる。
Ｃｏ−Ｃｒ−Ｗ−Ｃ系合金において、高い耐摩耗効果を
あげるためには、Ｃ、Ｗの含有量を増加して炭化物の析
出量を増加せしめ肉盛金属の高温強度を上昇させればよ
い。しかしながら、前記合金においてＣ、Ｗ等の炭化物
形成元素の含有量を過剰に増大すれば、肉盛金属の硬さ
は増大するものの、延性、特に室温での延性が低下して
しまうので、前記炭化物形成元素の含有量には自ずと限
界があった。[0003] Co-Cr-WC alloys are often used as build-up alloys for heat and wear resistance.
In the Co-Cr-WC alloy, a high wear resistance effect can be achieved by increasing the contents of C and W to increase the amount of carbides precipitated and increasing the high-temperature strength of the overlay metal. . However, if the content of carbide forming elements such as C and W in the alloy is excessively increased, the hardness of the build-up metal is increased, but the ductility, particularly the ductility at room temperature, is reduced. The content of the forming element was naturally limited.
【０００４】他方、高温強度が高い合金としてＡｌ，Ｔ
ｉを含有するＮｉ基合金が知られている。該合金を高温
耐摩耗部品の肉盛用合金として使用することが考えられ
る。該合金では、時効処理によって微細なγ′相（Ｎｉ
3Ａｌ）を析出させ、高温強度を向上するので、Ａｌ含
有量を多くしてγ′相の析出量を増加することにより高
温強度を高めることができる。On the other hand, Al, T
Ni-based alloys containing i are known. It is conceivable to use this alloy as a build-up alloy for high temperature wear resistant parts. In the alloy, a fine γ ′ phase (Ni
3 Al) is precipitated to improve the high-temperature strength, so that the high-temperature strength can be increased by increasing the Al content and increasing the precipitation amount of the γ 'phase.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
ような従来のＡｌ，Ｔｉを含有するＮｉ基合金におい
て、Ａｌ含有量を多くし過ぎると析出するγ′が粗大化
し、延性の低下を招く結果となり、耐熱・耐摩耗用肉盛
金属として十分な高温強度と延性とを兼ね備える肉盛金
属は得られていないのが現状である。However, in the above-mentioned conventional Ni-base alloy containing Al and Ti, if the Al content is too large, the precipitated γ 'becomes coarse and the ductility is reduced. As a result, at present, there has not been obtained a build-up metal having sufficient high-temperature strength and ductility as a heat-resistant and wear-resistant build-up metal.
【０００６】本発明は、上記の現状に鑑みてなされたも
ので、その目的とするところは、高温強度が高く、かつ
室温での延性に優れた耐熱・耐摩耗用肉盛金属が選られ
る肉盛用合金粉末を提供することにある。The present invention has been made in view of the above situation, and has as its object the purpose of selecting a heat-resistant and abrasion-resistant overlay metal having high high-temperature strength and excellent ductility at room temperature. An object of the present invention is to provide a filling alloy powder.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明の肉盛用合金粉末は、 （１）合金元素の含有率が、質量％で、Ｃ ：０．１０
％以上１．００％以下、Ｓｉ：２．０％以下、Ｃｒ：１
５．０％以上２５．０％以下、Ａｌ：１．０％以上４．
０％以下、Ｔｉ：３．０％以上９．０％以下、Ｆｅ：
３．０％以下であり、残余実質的にＮｉからなることを
特徴とする。Means for Solving the Problems In order to achieve the above object, the alloy powder for cladding of the present invention has the following features: (1) The content of alloying elements is% by mass and C: 0.10
% To 1.00%, Si: 2.0% or less, Cr: 1
5.0% or more and 25.0% or less, Al: 1.0% or more
0% or less, Ti: 3.0% to 9.0%, Fe:
3.0% or less, and the balance is substantially composed of Ni.
【０００８】（２）（１）項記載の合金成分に加えて、
強炭化物形成元素Ｗ、Ｍｏ、Ｚｒ、Ｔａ、Ｎｂ、Ｖのい
ずれか１種または２種以上をそれぞれ０．１〜４．０質
量％含有し、かつ、前記強炭化物形成元素の含有率とＴ
ｉ含有率との和が９．０質量％以下であることを特徴と
する。(2) In addition to the alloy components described in (1),
One or more of the strong carbide forming elements W, Mo, Zr, Ta, Nb, and V are each contained in an amount of 0.1 to 4.0 mass%, and the content of the strong carbide forming element and T
The sum with the i content is 9.0% by mass or less.
【０００９】（３）合金元素の含有率が、質量％で、Ｃ
：０．１０％以上１．００％以下、Ｓｉ：２．０％以
下、Ｃｒ：１５．０％以上２５．０％以下、Ａｌ：１．
０％以上４．０％以下、Ｔｉ：１．５％以上３．０％未
満、Ｆｅ：３．０％以下で、かつ、Ｗ、Ｍｏ、Ｚｒ、Ｔ
ａ、Ｎｂ、Ｖのいずれか１種または２種以上を、それぞ
れ０．１質量％以上４．０質量％以下、合計６．０質量
％以下含有し、残余実質的にＮｉからなることを特徴と
する。(3) When the content of the alloy element is expressed in mass%, C
: 0.10% or more and 1.00% or less, Si: 2.0% or less, Cr: 15.0% or more and 25.0% or less, Al: 1.
0% or more and 4.0% or less, Ti: 1.5% or more and less than 3.0%, Fe: 3.0% or less, and W, Mo, Zr, T
a, Nb, and / or V are contained in an amount of 0.1% by mass or more and 4.0% by mass or less, respectively, and a total of 6.0% by mass or less, and the balance is substantially composed of Ni. And
【００１０】（４）上記（１）〜（３）のいずれか１項
記載の合金元素に加えて、ＲＥＭを０．０１質量％以上
１．０％以下含有することを特徴とする。 （５）上記（１）〜（４）のいずれか１項記載の肉盛用
合金粉末であって、肉盛後６００〜８００℃で時効処理
して使用することを特徴とする。(4) In addition to the alloy element described in any one of the above (1) to (3), REM is contained in an amount of 0.01% by mass or more and 1.0% or less. (5) The cladding alloy powder according to any one of the above (1) to (4), which is used after aging at 600 to 800 ° C after the cladding.
【００１１】[0011]
【発明の実施の形態】本発明の肉盛用合金粉末は、Ｎｉ
を基とする合金であって、これにＡｌを添加してγ′相
の析出硬化を狙うとともに、Ｃおよび炭化物形成傾向の
強い元素を添加して炭化物を形成せしめ、該炭化物によ
る硬さの上昇と耐摩耗性の向上とを図ったものである。
本発明は、Ｎｉ基合金において、γ′相と炭化物とをバ
ランス良く析出させることにより室温での伸びを損なう
ことなく高い高温強度を確保することができるという知
見に基づいてなされたものである。本発明の肉盛用合金
粉末は、γ′相の析出を可能とし、長時間高温に曝され
てもγ′相の安定性を確保するためにＮｉ基合金とす
る。BEST MODE FOR CARRYING OUT THE INVENTION The cladding alloy powder of the present invention is Ni
An alloy based on the above, which aims to precipitate harden the γ 'phase by adding Al, and to form carbide by adding C and an element having a strong tendency to form carbide, thereby increasing the hardness due to the carbide. And improved wear resistance.
The present invention has been made based on the finding that a high-temperature strength can be secured without impairing the elongation at room temperature by precipitating a γ 'phase and a carbide in a well-balanced manner in a Ni-based alloy. The cladding alloy powder of the present invention is a Ni-based alloy in order to enable precipitation of the γ 'phase and to secure the stability of the γ' phase even when exposed to high temperatures for a long time.
【００１２】以下、本発明の肉盛用合金粉末の化学組成
を限定する理由について説明する。Ｃは、肉盛金属中に
おいて炭化物を形成することによって肉盛金属の強度を
高め、耐摩耗性を向上するために添加する。そのために
は肉盛用合金粉末中に０．１０質量％以上のＣを含有す
る必要がある。しかし、過剰にＣを含有すれば粗大炭化
物を形成し肉盛金属を脆化するのでＣ含有率の上限を
１．００質量％とする。Ｓｉは、肉盛金属の肉盛性を向
上するために添加する。しかし、過剰に添加すると肉盛
金属の延性を低下せしめるので肉盛用合金粉末中のＳｉ
含有率の上限を２．０質量％とする。Hereinafter, the reason for limiting the chemical composition of the cladding alloy powder of the present invention will be described. C is added in order to increase the strength of the build-up metal by forming carbides in the build-up metal and improve the wear resistance. For that purpose, it is necessary to contain 0.10% by mass or more of C in the overlaying alloy powder. However, if C is excessively contained, coarse carbides are formed and the overlay metal is embrittled. Therefore, the upper limit of the C content is set to 1.00% by mass. Si is added to improve the build-up property of the build-up metal. However, an excessive addition decreases the ductility of the overlay metal, so that Si
The upper limit of the content is 2.0% by mass.
【００１３】Ｃｒは、肉盛金属の高温における耐酸化性
を高めるために添加する。含有するＣｒの一部は、肉盛
金属中のＣと結合して炭化物を形成し、肉盛金属の高温
強度の向上に寄与する。これらの効果を得るために、肉
盛用合金粉末のＣｒ含有率の下限を１５．０質量％とす
る。Ｃｒ含有量が過剰になると形成される炭化物が粗大
化し肉盛金属の延性を低めるので、肉盛用合金粉末のＣ
ｒ含有率の上限は２５．０質量％とする。前記Ｃｒ添加
の効果を一層効果的にするためには、肉盛用合金粉末の
Ｃｒ含有率を１８．０〜２２．０質量％とすることが好
ましい。[0013] Cr is added to enhance the oxidation resistance of the overlay metal at high temperatures. Part of the contained Cr combines with C in the build-up metal to form a carbide and contributes to the improvement in the high-temperature strength of the build-up metal. In order to obtain these effects, the lower limit of the Cr content of the cladding alloy powder is set to 15.0% by mass. If the Cr content is excessive, the carbides formed are coarsened and the ductility of the overlay metal is reduced.
The upper limit of the r content is 25.0% by mass. In order to make the effect of the addition of Cr more effective, the Cr content of the cladding alloy powder is preferably set to 18.0 to 22.0% by mass.
【００１４】Ａｌは、生地Ｎｉ成分と結合してγ′相を
形成し、肉盛金属の強化、特に高温強度を向上するため
に添加する。そのために肉盛用合金粉末中のＡｌ含有率
の下限を１．０質量％とする。しかし、過剰にＡｌを含
有すれば、析出するγ′相が粗大化し強度向上の効果を
低減するので、肉盛用合金粉末中のＡｌ含有率の上限を
４．０質量％とする。Al is combined with the Ni component of the base material to form a γ 'phase, and is added to strengthen the build-up metal, particularly to improve the high-temperature strength. Therefore, the lower limit of the Al content in the cladding alloy powder is set to 1.0% by mass. However, if Al is excessively contained, the precipitated γ 'phase is coarsened and the effect of improving the strength is reduced, so the upper limit of the Al content in the cladding alloy powder is set to 4.0% by mass.
【００１５】Ｔｉは、γ′相の析出促進および炭化物の
形成による肉盛金属の強化のために添加する。Ｔｉは、
Ａｌを含むＮｉ基合金におけるγ′相の析出を促進する
元素である。また、Ｔｉの一部は含有するＣおよび不可
避的不純物として合金に含まれるＮと結合して炭窒化物
を形成する。本発明の肉盛用合金粉末においてγ′相の
析出促進による肉盛金属の強度向上の効果を得るために
は、肉盛用合金粉末中にＴｉを１．５質量％以上含有す
る必要がある。さらに、Ｔｉ炭化物を析出して肉盛金属
の高温強度を高めるためには、肉盛用合金粉末中にＴｉ
を３．０質量％以上含有する必要がある。しかし、９．
０質量％を超えて過剰にＴｉを含有すると炭化物の析出
量が過大となり、また、析出する炭化物が粗大化して肉
盛金属の延性を低下せしめる。それゆえ、Ｔｉのγ′析
出促進効果と炭化物形成効果との両者を併用する本発明
の第１および第２の実施態様（請求項１および請求項２
に対応）においては肉盛用合金粉末中のＴｉ含有率の下
限を３．０質量％とし、上限を９．０質量％とする。[0015] Ti is added for accelerating the precipitation of the γ 'phase and strengthening the build-up metal by forming carbides. Ti is
It is an element that promotes precipitation of the γ 'phase in a Ni-based alloy containing Al. Further, part of Ti combines with C contained therein and N contained in the alloy as an unavoidable impurity to form carbonitride. In order to obtain the effect of improving the strength of the overlay metal by accelerating the precipitation of the γ 'phase in the overlay alloy powder of the present invention, it is necessary to contain 1.5% by mass or more of Ti in the overlay alloy powder. . Furthermore, in order to increase the high-temperature strength of the cladding metal by precipitating Ti carbides, it is necessary to include Ti in the cladding alloy powder.
Must be contained at least 3.0% by mass. However, 9.
If Ti is contained excessively in excess of 0% by mass, the amount of carbide precipitation will be excessive, and the precipitated carbide will be coarsened and the ductility of the overlay metal will be reduced. Therefore, the first and second embodiments of the present invention using both the effect of promoting the precipitation of γ 'of Ti and the effect of forming carbide (claims 1 and 2)
), The lower limit of the Ti content in the cladding alloy powder is set to 3.0% by mass, and the upper limit is set to 9.0% by mass.
【００１６】Ｔｉの添加によってγ′析出を促進し、炭
化物による強度向上は主に後述の炭化物形成元素による
本発明の第３の実施態様（請求項３に対応）において
は、肉盛用合金粉末のＴｉ含有率を１．５質量％以上
３．０質量％未満とする。The addition of Ti promotes γ 'precipitation, and the improvement in strength by carbide is mainly achieved by the third embodiment of the present invention (corresponding to claim 3) mainly by a carbide-forming element described below. Is set to 1.5% by mass or more and less than 3.0% by mass.
【００１７】Ｗ、Ｍｏ、Ｚｒ、Ｔａ、Ｎｂ、Ｖは、いず
れも炭化物形成傾向が大きい強炭化物形成元素である。
前記強炭化物形成元素は、肉盛金属中のＣと結合して炭
化物を形成し肉盛金属の高温硬さを高めるために、肉盛
用合金粉末に１種または２種以上添加する。前記強炭化
物形成元素による高温硬さの上昇効果を得るためには、
前記強炭化物形成元素は、肉盛用合金粉末中にそれぞれ
０．１質量％以上含有することが必要である。しかし、
過剰に含有すると炭化物生成量は飽和し、徒に合金コス
トを高めるだけでなく、延性の低下を招くので、含有率
の上限は、それぞれ４．０質量％とする。また、２種以
上複合して添加する場合には合わせて６．０質量％以下
とする。W, Mo, Zr, Ta, Nb and V are all strong carbide-forming elements having a high tendency to form carbides.
One or more of the above-mentioned strong carbide-forming elements are added to the cladding alloy powder in order to combine with C in the cladding metal to form a carbide and increase the high-temperature hardness of the cladding metal. To obtain the effect of increasing the high-temperature hardness by the strong carbide-forming element,
It is necessary that each of the strong carbide forming elements be contained in the overlaying alloy powder in an amount of 0.1% by mass or more. But,
If contained excessively, the amount of carbides saturates, which not only raises the alloy cost but also lowers the ductility. Therefore, the upper limit of each content is set to 4.0% by mass. When two or more kinds are added in combination, the total amount is 6.0% by mass or less.
【００１８】肉盛金属のＦｅ含有率が増すと生地のＮｉ
含有率が減少し、γ′相の析出を抑制するためＦｅ含有
率は少ないことが好ましい。しかし肉盛用合金粉末のＦ
ｅ含有率を低減することは合金コストの上昇をもたらす
ので、肉盛金属の強度の低下に対して実質的な影響を及
ぼさない値として肉盛用合金粉末のＦｅ含有率の上限を
３．０質量％とする。As the Fe content of the cladding metal increases, Ni
It is preferable that the Fe content is small in order to reduce the content and suppress the precipitation of the γ 'phase. However, the F
Since lowering the e content leads to an increase in alloy cost, the upper limit of the Fe content of the cladding alloy powder is set at 3.0 as a value that does not substantially affect the reduction in the strength of the overlay metal. % By mass.
【００１９】ＲＥＭ（Rare Earth Metal：希土類金属）
は、肉盛金属の耐酸化性を向上するために添加すること
ができる。そのためには肉盛用合金粉末のＲＥＭ含有率
は０．０１質量％以上であることが必要である。しか
し、ＲＥＭを過剰に添加すると徒に合金コストを高める
だけでなく、肉盛金属の延性を低減するので、肉盛用合
金粉末のＲＥＭ含有率の上限を１．０質量％とする。REM (Rare Earth Metal)
Can be added to improve the oxidation resistance of the overlay metal. For that purpose, the REM content of the cladding alloy powder needs to be 0.01% by mass or more. However, excessive addition of REM not only increases the alloy cost but also reduces the ductility of the overlay metal, so the upper limit of the REM content of the overlay alloy powder is set to 1.0% by mass.
【００２０】本発明の肉盛用合金は、熱間鍛造などの塑
性加工が困難なので、アトマイズ法、遠心噴霧法などの
金属粉末製造法によって製造された微粉末として供給さ
れる。本発明の肉盛用合金粉末は活性元素を多量に含む
ので、不活性雰囲気で肉盛溶接することが好ましい。ま
た、本発明の肉盛用合金粉末は、部品に肉盛溶接後なん
ら熱処理を施すことなくそのまま使用しても、該部品が
使用中に受ける熱影響によって時効硬化を生じ、次第に
強度を上昇して耐摩耗性を高める。肉盛部品の使用初期
から高い強度が必要な場合は、肉盛溶接後６００〜８０
０℃で加熱する時効処理を施して使用することが好まし
い。Since the hardfacing alloy of the present invention is difficult to perform plastic working such as hot forging, it is supplied as a fine powder manufactured by a metal powder manufacturing method such as an atomizing method or a centrifugal spraying method. Since the cladding alloy powder of the present invention contains a large amount of active elements, it is preferable to perform cladding welding in an inert atmosphere. Further, the overlaying alloy powder of the present invention, even if used as it is without any heat treatment after overlay welding on the part, age hardening occurs due to the thermal effect of the part during use, and the strength gradually increases. To increase wear resistance. If high strength is required from the beginning of use of the overlay, 600 to 80 after overlay welding
It is preferable to use the aging treatment by heating at 0 ° C.
【００２１】[0021]
【実施例】ガスアトマイズ法によって、表１に示す各化
学組成を有する粒度＃６０-〜＃３００+の合金粉末を製
造した。EXAMPLE An alloy powder having a particle size of # 60 - to # 300 + having each chemical composition shown in Table 1 was produced by a gas atomizing method.
【００２２】[0022]
【表１】 [Table 1]
【００２３】プラズマトランスファーアークによる粉末
肉盛溶接法によって前記合金粉末を肉盛溶接し、肉盛金
属部分から試験片を切り出し、延性の評価をするために
常温における引張試験を、また、高温強度を評価するた
めに６００℃におけるビッカース硬さ試験を行った。ま
た、７００℃×４時間の時効処理を施した試験片につい
ても前記と同様な引張試験および硬さ試験を行った。引
張試験で得られた伸びおよび硬さ試験で得られた高温硬
さの値を表１に示す。The alloy powder is overlay-welded by a powder overlay welding method using a plasma transfer arc, a test piece is cut out from the overlay metal portion, a tensile test at room temperature is performed to evaluate ductility, and a high-temperature strength is evaluated. A Vickers hardness test at 600 ° C. was performed for evaluation. Further, the same tensile test and hardness test as described above were performed on the test pieces subjected to the aging treatment at 700 ° C. for 4 hours. Table 1 shows the values of the elongation obtained in the tensile test and the high-temperature hardness obtained in the hardness test.
【００２４】表１によれば、比較例においては、伸びが
大きいもの（比較例１、２、７、８）では十分に高い高
温硬さが得られず、また、高温硬さが高いもの（比較例
３〜５、９、１０）では伸びが著しく小さい。これに対
して、本発明の実施例においては、時効処理なしの場合
でもＨＶ３００以上の高温硬さと６％を超える大きな伸
びとを示しており、時効処理を施した場合にはＨＶ３３
０を超える高温硬さと３％を超える伸びとを示してい
る。以上の結果から、本発明の肉盛用合金粉末を用いて
肉盛溶接して得られる肉盛金属は、高い高温強度と大き
な延性とを兼ね備えることが明らかである。According to Table 1, in the comparative examples, those having large elongation (Comparative Examples 1, 2, 7, and 8) did not provide sufficiently high high-temperature hardness, and those having high high-temperature hardness ( In Comparative Examples 3 to 5, 9, and 10), the elongation is extremely small. On the other hand, in the example of the present invention, even without the aging treatment, a high-temperature hardness of HV300 or more and a large elongation of more than 6% are shown.
It shows a hot hardness above 0 and an elongation above 3%. From the above results, it is clear that the overlay metal obtained by overlay welding using the overlay alloy powder of the present invention has both high high-temperature strength and great ductility.
【００２５】[0025]
【発明の効果】以上に説明したように、本発明の肉盛用
合金粉末によれば、高温強度が高く、かつ、室温での延
性に優れた肉盛金属を得ることができる。これはＮｉ基
合金にγ′相と炭化物とをバランスよく析出するように
化学組成を調整するという本発明の効果によるものであ
る。本発明の肉盛用合金粉末を用いて肉盛溶接すること
によって、高温使用部品の耐摩耗肉盛部に発生する熱応
力等による割れの発生を防止することができ、部品の寿
命を延ばすという大きな経済効果が得られる。As described above, according to the cladding alloy powder of the present invention, a cladding metal having high strength at high temperatures and excellent ductility at room temperature can be obtained. This is due to the effect of the present invention that the chemical composition is adjusted so that the γ 'phase and the carbide are precipitated in the Ni-based alloy in a well-balanced manner. By overlay welding using the alloy powder for overlay of the present invention, it is possible to prevent the occurrence of cracks due to thermal stress or the like generated in the wear-resistant overlay of high-temperature parts, and to extend the life of the parts. Great economic effects can be obtained.
Claims (5)
ことを特徴とする肉盛用合金粉末。1. The content of an alloying element in mass%, C: 0.10% or more and 1.00% or less, Si: 2.0% or less, Cr: 15.0% or more and 25.0% or less, Al: 1.0% or more and 4.0% or less, Ti: 3.0% or more and 9.0% or less, Fe: 3.0% or less, and the balance is substantially composed of Ni. For alloy powder.
化物形成元素Ｗ、Ｍｏ、Ｚｒ、Ｔａ、Ｎｂ、Ｖのいずれ
か１種または２種以上をそれぞれ０．１〜４．０質量％
含有し、かつ、前記強炭化物形成元素の含有率とＴｉ含
有率との和が９．０質量％以下であることを特徴とする
請求項１記載の肉盛用合金粉末。2. In addition to the alloy component according to claim 1, one or more of any of the strong carbide-forming elements W, Mo, Zr, Ta, Nb, and V are each 0.1 to 4.0 mass%. %
The alloy powder for cladding according to claim 1, wherein the total of the content of the strong carbide forming element and the Ti content is 9.0 mass% or less.
Ｎｂ、Ｖのいずれか１種または２種以上を、それぞれ
０．１質量％以上４．０質量％以下、合計６．０質量％
以下含有し、残余実質的にＮｉからなることを特徴とす
る肉盛用合金粉末。3. The alloy element content is expressed by mass%: C: 0.10% to 1.00%, Si: 2.0% or less, Cr: 15.0% to 25.0%, Al: 1.0% or more and 4.0% or less, Ti: 1.5% or more and less than 3.0%, Fe: 3.0% or less, and W, Mo, Zr, Ta,
Any one or more of Nb and V are used in an amount of 0.1% by mass or more and 4.0% by mass or less, respectively, and a total of 6.0% by mass.
An alloy powder for cladding comprising the following and substantially consisting of Ni.
１質量％以上１．０％以下含有することを特徴とする請
求項１〜３のいずれか一項記載の肉盛用合金粉末。4. In addition to the above alloy elements, REM is 0.0
The cladding alloy powder according to any one of claims 1 to 3, which contains 1% by mass or more and 1.0% or less.
使用することを特徴とする請求項１〜４のいずれか一項
記載の肉盛用合金粉末。5. The alloy powder for cladding according to claim 1, which is used after aging at 600 to 800 ° C. after cladding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10350448A JP2000176679A (en) | 1998-12-09 | 1998-12-09 | Alloy powder for high ductile build-up welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10350448A JP2000176679A (en) | 1998-12-09 | 1998-12-09 | Alloy powder for high ductile build-up welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000176679A true JP2000176679A (en) | 2000-06-27 |
Family
ID=18410571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10350448A Pending JP2000176679A (en) | 1998-12-09 | 1998-12-09 | Alloy powder for high ductile build-up welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000176679A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100432966B1 (en) * | 2001-09-11 | 2004-05-28 | 재단법인 포항산업과학연구원 | Heat-treatment method for improving the wear-resistance of overlay-welded nickel alloy layer |
| WO2007002017A1 (en) * | 2005-06-20 | 2007-01-04 | Praxair S.T. Technology, Inc. | Laser cladding on low heat resistant substrates |
-
1998
- 1998-12-09 JP JP10350448A patent/JP2000176679A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100432966B1 (en) * | 2001-09-11 | 2004-05-28 | 재단법인 포항산업과학연구원 | Heat-treatment method for improving the wear-resistance of overlay-welded nickel alloy layer |
| WO2007002017A1 (en) * | 2005-06-20 | 2007-01-04 | Praxair S.T. Technology, Inc. | Laser cladding on low heat resistant substrates |
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