JP4086195B2 - Ni-based metallic glass alloy with excellent mechanical properties and plastic workability - Google Patents

Ni-based metallic glass alloy with excellent mechanical properties and plastic workability Download PDF

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JP4086195B2
JP4086195B2 JP2004113630A JP2004113630A JP4086195B2 JP 4086195 B2 JP4086195 B2 JP 4086195B2 JP 2004113630 A JP2004113630 A JP 2004113630A JP 2004113630 A JP2004113630 A JP 2004113630A JP 4086195 B2 JP4086195 B2 JP 4086195B2
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atomic
alloy
temperature
metallic glass
amorphous
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JP2005298858A (en
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明久 井上
偉 張
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Japan Science and Technology Agency
National Institute of Japan Science and Technology Agency
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本発明は、大きな非晶質形成能を有し、機械的性質と塑性加工性に優れたNi基金属ガラ
ス合金に関するものである。
The present invention relates to a Ni-based metallic glass alloy having a large amorphous forming ability and excellent in mechanical properties and plastic workability.

溶融状態の合金を急冷することにより、薄帯状、フィラメント状、粉粒体状など、種々の
形状を有する非晶質(アモルファス)合金が得られることがよく知られている。非晶質合
金薄帯は、大きな急冷速度の得られる単ロール法、双ロール法、回転液中紡糸法、アトマ
イズ法などの種々の方法で作製できるので、これまでにもFe系、Ti系、Co系、Zr
系、Cu系、Pd系又はNi系について多くの非晶質合金が得られており、優れた機械的
性質、高い耐腐食性等の非晶質合金特有の性質が明らかにされた。
It is well known that an amorphous alloy having various shapes such as a ribbon shape, a filament shape, and a granular material shape can be obtained by rapidly cooling a molten alloy. Amorphous alloy ribbons can be produced by various methods such as a single roll method, a twin roll method, a spinning in a rotating liquid method, an atomizing method and the like that can obtain a large quenching rate. Co-based, Zr
Many amorphous alloys have been obtained with respect to Cu, Cu, Pd, or Ni, and properties specific to amorphous alloys such as excellent mechanical properties and high corrosion resistance have been clarified.

例えば、Ni基非晶質合金では、Ni-Pd-Si-B-Al合金(特許文献1)、Ni-P-B
合金( 特許文献2)、RNi系高硬度合金(Rは、Ta、Nb、又はWの1種
以上、Tは、Ti又はZrの1種以上、rは、35〜65原子%、sは、25〜65原子
%、tは、15原子%以下、r、s、tの合計は100)(特許文献3)、Ta−Ni,T
a−(Ti,Nb,W)−Ni系高耐食性合金(特許文献4)などが知られている。
For example, Ni-Pd-Si-B-Al alloys (Patent Document 1), Ni-P-B are used as Ni-based amorphous alloys.
Alloy (Patent Document 2), R r Ni s T t based high hardness alloy (R is Ta, Nb, or W 1 or more, T is, Ti or Zr 1 or more, r is, 35 to 65 atom %, S is 25 to 65 atomic%, t is 15 atomic% or less, and the total of r, s, and t is 100) (Patent Document 3), Ta-Ni, T
An a- (Ti, Nb, W) -Ni-based high corrosion resistance alloy (Patent Document 4) is known.

しかし、これらのNi基非晶質合金は液体急冷法により薄帯状、粉末状、細線状などのも
のしか得られていない。そして、高い熱的安定性を示しておらず、最終製品形状へ加工す
ることも困難なことから、工業的に見て、その用途がかなり限定されていた。
However, these Ni-based amorphous alloys have only been obtained in the form of strips, powders, fine wires, etc. by the liquid quenching method. And since it does not show high thermal stability and it is difficult to process it into a final product shape, its use is considerably limited from an industrial viewpoint.

アモルファス合金をバルク状で作るという夢を実現したのが「金属ガラス」である。すな
わち、ガラス形成能が非常に高い合金が1980年代にPd-Si-Cu合金で見出だされ
た。さらに、1990年になってから、実用的な合金組成でガラス形成能が非常に高い合
金が見出された。一般に、「アモルファス合金」では加熱によりガラス転移点に到達する
前に結晶化が進行してしまい、ガラス転移は実験的には観察できない。これに対して、「
金属ガラス」は加熱によって明瞭なガラス転移が観察され、結晶化温度までの過冷却液体
領域の温度範囲が数十Kにも達する。
“Metallic glass” has realized the dream of making amorphous alloys in bulk. That is, an alloy having a very high glass forming ability was found in the 1980s as a Pd—Si—Cu alloy. Furthermore, since 1990, alloys with a practical alloy composition and a very high glass forming ability have been found. In general, in an “amorphous alloy”, crystallization proceeds before reaching the glass transition point by heating, and the glass transition cannot be observed experimentally. On the contrary,"
A clear glass transition is observed in the “metal glass” by heating, and the temperature range of the supercooled liquid region up to the crystallization temperature reaches several tens of K.

この物性を備えることにより初めて、冷却速度の遅い銅金型に鋳込む方法によってバルク
状のアモルファス合金を作ることができるようになった。このようなアモルファス合金が
、特に、「金属ガラス」と呼ばれているのは、金属でありながら、酸化物ガラスのように
安定な非晶質で、高温で容易に塑性変形(粘性流動)できるためである。
For the first time with this physical property, a bulk amorphous alloy can be made by a method of casting into a copper mold having a slow cooling rate. Such an amorphous alloy is particularly called a “metal glass”, although it is a metal, it is a stable amorphous material like oxide glass and can be easily plastically deformed (viscous flow) at high temperatures. Because.

「金属ガラス」は、非晶質形成能が高い、すなわち、ガラス相からなる、より寸法の大き
な、いわゆるバルクの金属鋳造体を銅金型鋳造等により溶湯から過冷却液体状態において
冷却凝固して製造できる特性を有するものであり、また、過冷却液体状態に加熱すると合
金の粘性が低下するために閉塞鍛造などの方法により任意形状に塑性加工できる特性を有
するものであり、これらの特性を有しない、従来のアモルファス合金薄帯やファイバーな
どの「アモルファス合金」とは本質的に異なる材料であり、各種工業製品の材料としての
有用性は非常に大きい。
“Metal glass” has a high amorphous forming ability, that is, a so-called bulk metal casting made of a glass phase and larger in size is cooled and solidified in a supercooled liquid state from a molten metal by copper mold casting or the like. It has characteristics that can be manufactured, and since it has a characteristic that it can be plastically processed into an arbitrary shape by a method such as closed forging because the viscosity of the alloy decreases when heated to a supercooled liquid state. However, it is a material that is essentially different from “amorphous alloys” such as conventional amorphous alloy ribbons and fibers, and is very useful as a material for various industrial products.

本発明者らは、先に、非晶質形成能、加工性、機械的強度に優れたNi-P-M(Mは、T
i,Zr,Hf,Nb,又はTaの1種以上)系Ni基金属ガラス合金を開発した(特許文献
5)。また、2003年に高いガラス安定性及び非晶質形成能に優れたNi-Nb-Sn基
金属ガラス合金が開発された(非特許文献1)が、このNi基金属ガラス合金は非常に脆
くて、優れた機械的性質と高いガラス安定性を備えていると言えない。
The inventors of the present invention have previously described Ni-PM (M is T) excellent in amorphous forming ability, workability, and mechanical strength.
One or more of i, Zr, Hf, Nb, or Ta) based Ni-based metallic glass alloys have been developed (Patent Document 5). Further, in 2003, a Ni—Nb—Sn-based metallic glass alloy having high glass stability and excellent amorphous forming ability was developed (Non-patent Document 1), but this Ni-based metallic glass alloy is very brittle. It cannot be said that it has excellent mechanical properties and high glass stability.

特開平6-25807号公報JP-A-6-25807 特開平9-143642号公報Japanese Unexamined Patent Publication No. 9-14642 特公昭60-28899号公報Japanese Patent Publication No. 60-28899 特公平6-15706号公報Japanese Patent Publication No. 6-15706 特開2000-87197号公報Japanese Unexamined Patent Publication No. 2000-87197 APPL. PHYS. LETT. 82 (7): 1030-1032,FEB. 17(2003)APPL. PHYS. LETT. 82 (7): 1030-1032, FEB. 17 (2003)

本発明と関連するNi基非晶質合金では、主に磁気的性質及び耐食性に着目した研究が行
われてきた。これらのNi―非金属(Si,B,P,C)系非晶質合金は、主に上述の単
ロール液体急冷法により作製された薄帯状試料で研究がなされた。しかしながら、実用的
な使用に適する大形状Ni基非晶質合金、言い換えれば非晶質形成能に優れたNi基金属
ガラス合金に関して研究開発はあまり進んでいない。前述したNi基金属ガラス合金は高
い熱的安定性、大きなガラス形成能、優れた塑性加工性、優れた機械的性質を兼ね備えて
いなかった。
In the Ni-based amorphous alloys related to the present invention, research mainly focusing on magnetic properties and corrosion resistance has been conducted. These Ni-nonmetal (Si, B, P, C) amorphous alloys have been studied mainly with thin strip samples prepared by the single-roll liquid quenching method described above. However, research and development have not progressed so far with respect to large-shaped Ni-based amorphous alloys suitable for practical use, in other words, Ni-based metallic glass alloys with excellent amorphous forming ability. The aforementioned Ni-based metallic glass alloys did not have high thermal stability, large glass forming ability, excellent plastic workability, and excellent mechanical properties.

そこで、本発明者らは、上述の課題を解決するために、大きな非晶質形成能を有し、優れ
た塑性加工性、機械的性質を兼ね備えたNi基金属ガラス合金を提供することを目的とし
て、最適組成について研究した結果、Ni基からなる特定組成の合金を溶融し、液体状態
から急冷凝固させることによって、40K以上の過冷却液体領域△Txを示す上述の性能を
具備したNi基金属ガラス合金が得られることを見出し、本発明を完成するに至った。
In order to solve the above-mentioned problems, the present inventors have an object to provide a Ni-based metallic glass alloy having a large amorphous forming ability and having excellent plastic workability and mechanical properties. As a result of studying the optimum composition, a Ni-based metal having the above-described performance showing a supercooled liquid region ΔTx of 40 K or more by melting an alloy having a specific composition made of Ni and rapidly solidifying it from a liquid state. It discovered that a glass alloy was obtained and came to complete this invention.

すなわち、本発明は、下記の組成式で示されるNi基金属ガラス合金である。
(1)金型鋳造法により作製された合金であって、
式 : Ni100−a−b−cTaTi(Zr,Hf)[式中、a,b,cは原子%で

5原子%≦a≦35原子%、
5原子%≦b<35原子%、かつ
15原子%≦a+b<40原子%、
0原子%<c≦20原子%であり、かつ
30原子%≦a+b+c≦55原子%、
を満足する。]で示される組成を有し、
△Tx=Tx-Tg(ただし、Txは、結晶化開始温度、Tgはガラス遷移温度を示す。)の式で表
わされる過冷却液体領域△Txが40K以上、Tg/Tl(ただし、Tlは、合金の液相線温度を
示す。)の式で表わされる換算ガラス化温度が0.56以上であり、非晶質相を体積百分
率で80%以上含む、圧縮強度が2800MPa以上の高強度と塑性加工性を有することを
特徴とするNi基金属ガラス合金。
That is, the present invention is a Ni-based metallic glass alloy represented by the following composition formula.
(1) An alloy produced by a mold casting method,
Formula: Ni 100- abc Ta a Ti b (Zr, Hf) c [wherein a, b, c are atomic%,
5 atomic% ≦ a ≦ 35 atomic%,
5 atomic% ≦ b <35 atomic% and 15 atomic% ≦ a + b <40 atomic%,
0 atomic% <c ≦ 20 atomic% and 30 atomic% ≦ a + b + c ≦ 55 atomic%,
Satisfied. And a composition represented by
ΔTx = Tx−Tg (where Tx is the crystallization start temperature, Tg is the glass transition temperature), the supercooled liquid region ΔTx is 40K or more, Tg / Tl (where Tl is The conversion vitrification temperature represented by the formula of the alloy is 0.56 or more, the amorphous phase is contained 80% or more by volume, and the compressive strength is 2800 MPa or more. A Ni-based metallic glass alloy characterized by having processability.

(2)金型鋳造法により作製された合金であって、
式 :Ni100−a−b−dTaTiNb[式中、a,b,dは原子%で、
5原子%≦a≦35原子%、
5原子%≦b<35原子%、かつ
15原子%≦a+b<40原子%、
0原子%<d<35原子%であり、かつ
30原子%≦a+b+d≦55原子%、
を満足する。]で示される組成を有し、
△Tx=Tx-Tg(ただし、Txは、結晶化開始温度、Tgはガラス遷移温度を示す。)の式で表
わされる過冷却液体領域△Txが40K以上、Tg/Tl(ただし、Tlは、合金の液相線温度を
示す。)の式で表わされる換算ガラス化温度が0.56以上であり、非晶質相を体積百分
率で80%以上含む、圧縮強度が2800MPa以上の高強度と塑性加工性を有することを
特徴とするNi基金属ガラス合金。
(2) An alloy produced by a mold casting method,
Formula: Ni 100-abd Ta a Ti b Nb d [wherein a, b, d are atomic%,
5 atomic% ≦ a ≦ 35 atomic%,
5 atomic% ≦ b <35 atomic% and 15 atomic% ≦ a + b <40 atomic%,
0 atomic% <d <35 atomic% and 30 atomic% ≦ a + b + d ≦ 55 atomic%,
Satisfied. And a composition represented by
ΔTx = Tx−Tg (where Tx is the crystallization start temperature and Tg is the glass transition temperature), the supercooled liquid region ΔTx is 40K or more, Tg / Tl (where Tl is The conversion vitrification temperature represented by the formula of the alloy is 0.56 or more, the amorphous phase is contained 80% or more by volume, and the compressive strength is 2800 MPa or more. A Ni-based metallic glass alloy characterized by having processability.

(3)金型鋳造法により作製された合金であって、
式 :Ni100−a−b−c−dTaTi (Zr,Hf)Nb[式中、a, b,
c, dは原子%で、
5原子%≦a≦35原子%、
5原子%≦b<35原子%、かつ
15原子%≦a+b<40原子%、
0原子%<c≦20原子%、
0原子%≦d<35原子%であり、かつ
30原子%≦a+b +c+d≦ 55原子%、
を満足する。]で示される組成を有し、
△Tx=Tx-Tg(ただし、Txは、結晶化開始温度、Tgはガラス遷移温度を示す。)の式で表
わされる過冷却液体領域△Txが40K以上、Tg/Tl(ただし、Tlは、合金の液相線温度を
示す。)の式で表わされる換算ガラス化温度が0.56以上であり、非晶質相を体積百分
率で80%以上含む、圧縮強度が2800MPa以上の高強度と塑性加工性を有することを
特徴とするNi基金属ガラス合金。
(3) An alloy produced by a mold casting method,
Formula: Ni 100-a-bc-d Ta a Ti b (Zr, Hf) c Nb d [where a, b,
c and d are atomic%,
5 atomic% ≦ a ≦ 35 atomic%,
5 atomic% ≦ b <35 atomic% and 15 atomic% ≦ a + b <40 atomic%,
0 atomic% <c ≦ 20 atomic%,
0 atomic% ≦ d <35 atomic% and 30 atomic% ≦ a + b + c + d ≦ 55 atomic%,
Satisfied. And a composition represented by
ΔTx = Tx−Tg (where Tx is the crystallization start temperature, Tg is the glass transition temperature), the supercooled liquid region ΔTx is 40K or more, Tg / Tl (where Tl is The conversion vitrification temperature represented by the formula of the alloy is 0.56 or more, the amorphous phase is contained 80% or more by volume, and the compressive strength is 2800 MPa or more. A Ni-based metallic glass alloy characterized by having processability.

本発明のNi基金属ガラス合金は、 △Tx=Tx-Tg(ただし、Txは、結晶化開始温度、Tg
はガラス遷移温度を示す。)の式で表わされる過冷却液体領域△Txが40K以上である。
また、Tg/Tl(ただし、Tlは、合金の液相線温度を示す。)の式で表わされる換算ガラ
ス化温度が0.56以上である。本発明のNi基金属ガラス合金は、 金型鋳造法により直
径又は厚さ0.5mm以上で、非晶質相の体積比率80%以上の棒材又は板材が得られる。
本発明のNi基金属ガラス合金は、圧縮強度2800MPa以上、硬度Hvが750以上であ
り、機械的性質に優れている。
The Ni-based metallic glass alloy of the present invention has ΔTx = Tx-Tg (where Tx is the crystallization start temperature, Tg
Indicates the glass transition temperature. ) The supercooled liquid region ΔTx represented by the formula (1) is 40K or more.
Moreover, the conversion vitrification temperature represented by the formula of Tg / Tl (where Tl represents the liquidus temperature of the alloy) is 0.56 or more. The Ni-based metallic glass alloy of the present invention can be obtained by a die casting method as a bar or plate having a diameter or thickness of 0.5 mm or more and an amorphous phase volume ratio of 80% or more.
The Ni-based metallic glass alloy of the present invention has a compressive strength of 2800 MPa or more and a hardness Hv of 750 or more, and is excellent in mechanical properties.

なお、本明細書中の「過冷却液体領域」とは、毎分40Kの加熱速度で示差走査熱量分析
を行うことにより得られるガラス遷移温度Tgと結晶化開始温度Txの温度間隔で定義される
ものである。「過冷却液体領域」は結晶化に対する抵抗力、すなわち非晶質の安定性及び
加工性を示す数値である。本合金は40K以上の過冷却液体領域△Txを有する。また、本
明細書中の「換算ガラス化温度」とは、ガラス遷移温度(Tg)と毎分5Kの加熱速度で示
差熱量分析(DTA)を行うことにより得られる合金液相線温度(Tl)の比で定義されるも
のである。「換算ガラス化温度」は非晶質形成能力を示す数値である。
The “supercooled liquid region” in this specification is defined by the temperature interval between the glass transition temperature Tg and the crystallization start temperature Tx obtained by performing differential scanning calorimetry at a heating rate of 40 K / min. Is. The “supercooled liquid region” is a numerical value indicating resistance to crystallization, that is, amorphous stability and workability. This alloy has a supercooled liquid region ΔTx of 40K or more. The “equivalent vitrification temperature” in the present specification means an alloy liquidus temperature (Tl) obtained by performing differential calorimetry (DTA) at a glass transition temperature (T g ) and a heating rate of 5 K / min. ). The “converted vitrification temperature” is a numerical value indicating the amorphous forming ability.

本発明で規定する合金の組成範囲において、0.2mm以上の断面積の線状金属ガラス合
金塊又は0.1mm以上の厚さの板状金属ガラス合金が容易に得られる。金属元素より構成
される合金は非晶質化することにより一般にその機械的性質が向上するが、本発明のNi
基金属ガラス合金において、塊状試料で、2800MPaを超える圧縮強度を持つものが容
易に得られ、塑性伸びを示した。本発明のNi基ガラス合金から、製造される塊状試料は
具体的には、断面積が0.2mm以上、圧縮強度が2800MPa以上である。なお、リボン
試料の引張強度は圧縮強度と同程度である。
In the composition range of the alloy specified in the present invention, a linear metal glass alloy block having a cross-sectional area of 0.2 mm 2 or more or a plate-like metal glass alloy having a thickness of 0.1 mm or more can be easily obtained. An alloy composed of a metal element generally improves its mechanical properties by making it amorphous.
In the base metal glass alloy, a massive sample having a compressive strength exceeding 2800 MPa was easily obtained, and showed plastic elongation. Specifically, the bulk sample produced from the Ni-based glass alloy of the present invention has a cross-sectional area of 0.2 mm 2 or more and a compressive strength of 2800 MPa or more. The tensile strength of the ribbon sample is about the same as the compressive strength.

本発明のNi基合金組成は、40K以上の過冷却液体領域を示すことから大きな非晶質形
成能を有し、金型鋳造法により厚さ1mm以上の板状材料又は直径1mm以上の棒状材料を容
易に作製することができる。また、高強度、高硬度を有する。これらのことから、本発明
は、優れた塑性加工性、優れた機械的性質及び耐食性を兼備した実用上有用なNi基金属
ガラス合金を提供することができる。
Since the Ni-based alloy composition of the present invention exhibits a supercooled liquid region of 40K or more, it has a large amorphous forming ability, and a plate-like material having a thickness of 1 mm or more or a rod-like material having a diameter of 1 mm or more by a die casting method Can be easily manufactured. Moreover, it has high strength and high hardness. From these facts, the present invention can provide a practically useful Ni-based metallic glass alloy having excellent plastic workability, excellent mechanical properties and corrosion resistance.

以下に本発明の実施の形態を説明する。本発明のNi基ガラス合金において、Ta、Ti
は、本発明の合金の基幹となる元素群であり、特に非晶質を形成する基本となる元素であ
る。Taは、5原子%以上35原子%以下で、好ましくは5原子%以上30原子%以下、
さらに好ましくは5原子%以上25原子%以下である。Tiは、5原子%以上35原子%
以下で、好ましくは5原子%以上30原子%以下、さらに好ましくは5原子%以上20原
子%以下である。これらの元素は合計で15原子%以上40原子%未満、好ましくは20
原子%以上35原子%以下とする。上記の組成範囲を外れると非晶質形成能が低下する。
Embodiments of the present invention will be described below. In the Ni-based glass alloy of the present invention, Ta, Ti
Is a basic element group of the alloy of the present invention, and is a basic element that forms amorphous in particular. Ta is 5 atom% or more and 35 atom% or less, preferably 5 atom% or more and 30 atom% or less,
More preferably, they are 5 atomic% or more and 25 atomic% or less. Ti is 5 atomic% or more and 35 atomic%
In the following, it is preferably 5 atom% or more and 30 atom% or less, more preferably 5 atom% or more and 20 atom% or less. These elements total 15 to 40 atomic%, preferably 20
Atom% or more and 35 atom% or less. Outside the above composition range, the amorphous forming ability decreases.

また、Zr、Hf元素は、Ta、Tiとの合計で30原子%以上55原子%以下、より好
ましくは35原子%以上55原子%以下の範囲でNi-Ta-Ti系合金の非晶質形成能を
高める効果を有する。Zr、Hf元素量は、合計で20原子%以下で、好ましくは2.5
原子%以上15原子%以下である。
Further, the Zr and Hf elements are formed in a total amount of Ta and Ti in the range of 30 atomic% to 55 atomic%, more preferably in the range of 35 atomic% to 55 atomic%. Has the effect of enhancing performance. The total amount of Zr and Hf elements is 20 atomic% or less, preferably 2.5.
Atom% or more and 15 atom% or less.

Nbは、Ta、Ti元素との合計で30原子%以上55原子%以下、より好ましくは35
原子%以上55原子%以下の範囲でNi- Ta-Ti系合金の非晶質形成能を高める効果
を有する。Nbは、35原子%以下で、好ましくは5原子%以上30原子%以下である。
Nb is 30 to 55 atomic% in total with Ta and Ti elements, more preferably 35
In the range of atomic% or more and 55 atomic% or less, it has the effect of increasing the amorphous-forming ability of the Ni-Ta-Ti alloy. Nb is 35 atomic% or less, preferably 5 atomic% or more and 30 atomic% or less.

Niは20原子%まではFe、Co、Cu、Mnよりなる群から選択される1種又は2種
以上の元素によって置換することにより、合金液相線温度(Tl)が下がり、非晶質形成能
は増大するが、20原子%を超えると過冷却液体領域△Txが小さくなり非晶質形成能が低
下する。
Ni is replaced by up to 20 atomic% with one or more elements selected from the group consisting of Fe, Co, Cu, and Mn, thereby lowering the alloy liquidus temperature (Tl) and forming an amorphous state. However, if it exceeds 20 atomic%, the supercooled liquid region ΔTx becomes small and the amorphous forming ability decreases.

少量のGe、Sn、Si、Be、B、Al、Ag、Pd、Pt、Au又は希土類元素より
なる群から選択される1種又は2種以上の元素の添加は過冷却液体領域△Txは増大するが
、5原子%を超えると非晶質形成能が劣化するため、添加する場合は5原子%以下とする
。これらの元素は、Ta、Ti、Zr、Hf、Nb元素との合計で30原子%以上55原
子%以下、より好ましくは35原子%以上55原子%以下の範囲とする。少量のCr、V
、Mo、Wの添加は強度の向上に有効であるが、非晶質形成能が劣化するため、添加する
場合は5原子%以下とする。
Addition of one or more elements selected from the group consisting of a small amount of Ge, Sn, Si, Be, B, Al, Ag, Pd, Pt, Au or rare earth elements increases the supercooled liquid region ΔTx However, if it exceeds 5 atomic%, the amorphous forming ability deteriorates. These elements are in the range of 30 atomic% to 55 atomic%, more preferably 35 atomic% to 55 atomic% in total with the Ta, Ti, Zr, Hf, and Nb elements. Small amount of Cr, V
The addition of Mo and W is effective for improving the strength, but the amorphous forming ability deteriorates.

本発明のNi基金属ガラス合金は大きな非晶質形成能を有するため、溶融金属を金型に充
填鋳造することにより任意の形状の金属ガラス合金製品を得ることができる。例えば、代
表的な金型鋳造法においては、合金を石英管中でアルゴン雰囲気中において溶融した後、
溶融金属を0.5〜1.5kg・f/cmの噴出圧で銅製の金型内に充填凝固させることにより
金属ガラス合金塊を得ることができる。更に、ダイカストキャスティング法及びスクイズ
キャスティング法などの製造方法を適用することもできる。
Since the Ni-based metallic glass alloy of the present invention has a large amorphous forming ability, a metallic glass alloy product having an arbitrary shape can be obtained by filling and casting molten metal into a mold. For example, in a typical mold casting method, after melting an alloy in a quartz tube in an argon atmosphere,
A metallic glass alloy lump can be obtained by filling and solidifying the molten metal in a copper mold at an ejection pressure of 0.5 to 1.5 kg · f / cm 2 . Furthermore, a manufacturing method such as a die casting method and a squeeze casting method can also be applied.

以下、本発明の実施例について説明する。表1に示す合金組成からなる材料(実施例1〜
11)について、アーク溶解法により原料合金を溶製した。これらの合金を石英管中でア
ルゴン雰囲気中に1600〜1800Kの温度で再溶融した後、溶融金属を0.2〜0.5k
g・f/cmの噴出圧で回転速度が40m/sの銅製のロールの表面に噴射する(単ロール液体
急冷法)ことによって幅約1mmで厚さ約20μmの薄帯試料を作製した。また、銅金型
鋳造法によって直径1mm、長さ約40mmの棒状試料を作製した。
Examples of the present invention will be described below. Materials composed of alloy compositions shown in Table 1 (Examples 1 to
11 ) The raw material alloy was melted by the arc melting method. After re-melting these alloys in a quartz tube in an argon atmosphere at a temperature of 1600-1800K, the molten metal was 0.2-0.5k.
A ribbon sample having a width of about 1 mm and a thickness of about 20 μm was prepared by spraying onto the surface of a copper roll having a rotation speed of 40 m / s with a jet pressure of g · f / cm 2 (single roll liquid quenching method). Further, a rod-shaped sample having a diameter of 1 mm and a length of about 40 mm was produced by a copper mold casting method.

実施例1〜11、比較例1、3、5は直径1mmの棒状試料であり、比較例2、4、6は薄
帯試料である。そして、薄帯試料のガラス遷移温度(Tg)、結晶化開始温度(Tx)を示差走査
熱量計(DSC)より測定した。これらの値より過冷却液体領域(Tx-Tg)を算出した。液相線
温度(Tl)の測定は、示査熱分析(DTA)により測定した。これらの値より換算ガラス化
温度(Tg/Tl)を算出した。
Examples 1 to 11 and Comparative Examples 1, 3, and 5 are rod-shaped samples having a diameter of 1 mm, and Comparative Examples 2, 4, and 6 are ribbon samples. The glass transition temperature (T g ) and crystallization start temperature (T x ) of the ribbon sample were measured with a differential scanning calorimeter (DSC). The supercooled liquid region (T x -T g ) was calculated from these values. The liquidus temperature (Tl) was measured by differential thermal analysis (DTA). The conversion vitrification temperature (Tg / Tl) was calculated from these values.

また、金型鋳造法により作製した直径1mmの棒状試料の非晶質化の確認はX線回折法によ
り行った。また、試料中に含まれる非晶質相の体積比率(V−amo.)は、DSCを用
いて結晶化の際の発熱量を完全非晶質化した厚さ約20μmの薄帯との比較により評価し
た。これらの評価結果を表1に示す。さらに、圧縮試験片を作製し、インストロン型試験
機を用いて圧縮試験を行い圧縮強度(σf)を評価した。また、ビッカース硬さHv(荷重、
時間はそれぞれ25グラム、15秒である)を測定した。評価結果を表1に示す。

Figure 0004086195
Further, confirmation of amorphization of the rod-shaped sample having a diameter of 1 mm produced by the die casting method was performed by an X-ray diffraction method. Further, the volume ratio (V f -amo.) Of the amorphous phase contained in the sample is the same as that of the ribbon having a thickness of about 20 μm, which is obtained by completely amorphizing the heat generated during crystallization using DSC. Evaluation was made by comparison. These evaluation results are shown in Table 1. Further, a compression test piece was prepared, and a compression test (σ f ) was evaluated by performing a compression test using an Instron type testing machine. Also, Vickers hardness Hv (load,
Time was 25 grams and 15 seconds respectively). The evaluation results are shown in Table 1.
Figure 0004086195

表1より明らかなように、実施例1〜11の金属ガラス合金は、40 K以上の過冷却液体
領域と0.56以上の換算ガラス化温度を示すとともに、直径1mmの金属ガラス合金棒が
容易に得られた。図1、図2には、それぞれ実施例1(Ni60Ta20Ti10Zr
)の金属ガラス合金のDSC曲線及びX−線回折図形を示す。実施例1〜11の合金は非
晶質相を体積百分率で80%以上含むが、比較例4の合金は、Co量が20原子%を超え
、大きなガラス形成能を持っておらず、直径1mmの棒状金属ガラス合金が得られなかった
。比較例5、6の合金は、本発明の合金組成の基本元素の一つであるTiを含有しておら
ず、直径1mmの棒状金属ガラス合金が得られなかった。
As is clear from Table 1, the metal glass alloys of Examples 1 to 11 exhibit a supercooled liquid region of 40 K or more and a converted vitrification temperature of 0.56 or more, and a metal glass alloy rod having a diameter of 1 mm is easy. Was obtained. 1 and 2 show Example 1 (Ni 60 Ta 20 Ti 10 Zr 1
1 ) shows the DSC curve and X-ray diffraction pattern of the metallic glass alloy. Although the alloys of Examples 1 to 11 contain an amorphous phase in a volume percentage of 80% or more, the alloy of Comparative Example 4 has a Co content exceeding 20 atomic%, does not have a large glass forming ability, and has a diameter of 1 mm. No rod-shaped metallic glass alloy was obtained. The alloys of Comparative Examples 5 and 6 did not contain Ti which is one of the basic elements of the alloy composition of the present invention, and a rod-shaped metallic glass alloy having a diameter of 1 mm was not obtained.

また、表1より明らかなように、実施例1〜11の金属ガラス合金は、2800MPa以上
の圧縮破断強度及び750Hv以上のビッカース硬度を示す。これに対して、比較例1の合
金は、Taを含有しておらず、強度が2800MPa未満になる。比較例2の合金は、Ta
、Tiを含有しておらず非晶質形成能を有しない。比較例3の合金は、非常に脆く、塑性
加工性が悪い。図3には、実施例1(Ni60Ta20Ti15Zr)の合金の圧縮試
験の応力−歪み曲線を示す。図3に示されるように、本発明の合金は塑性伸びを示し、優
れた塑性加工性を有することが分かる。
Further, as apparent from Table 1, the metal glass alloys of Examples 1 to 11 exhibit a compressive breaking strength of 2800 MPa or more and a Vickers hardness of 750 Hv or more. On the other hand, the alloy of Comparative Example 1 does not contain Ta and has a strength of less than 2800 MPa. The alloy of Comparative Example 2 is Ta
, Does not contain Ti and does not have amorphous forming ability. The alloy of Comparative Example 3 is very brittle and has poor plastic workability. 3 shows, in Example 1 (Ni 60 Ta 20 Ti 15 Zr 5) of the compression test of the alloy of the stress - showing a strain curve. As shown in FIG. 3, it can be seen that the alloy of the present invention exhibits plastic elongation and has excellent plastic workability.

本発明のNi基金属ガラス合金は、強度と耐磨耗性が要求される小型精密機器部品及び耐
食性が要求される配管、燃料電池用メタルセパレータなどに適する特性を有している。
The Ni-based metallic glass alloy of the present invention has characteristics suitable for small precision equipment parts that require strength and wear resistance, pipes that require corrosion resistance, metal separators for fuel cells, and the like.

実施例1の金属ガラス合金材のDSC曲線図である。2 is a DSC curve diagram of the metal glass alloy material of Example 1. FIG. 実施例1の金属ガラス合金材のX−線回折図形である。2 is an X-ray diffraction pattern of the metal glass alloy material of Example 1. FIG. 実施例1の金属ガラス合金材の圧縮試験による応力−歪み曲線図である。It is a stress-strain curve figure by the compression test of the metallic glass alloy material of Example 1.

Claims (3)

金型鋳造法により作製された合金であって、
式 : Ni100−a−b−cTaTi(Zr,Hf)[式中、a,b,cは原子%で

5原子%≦a≦35原子%、
5原子%≦b<35原子%、かつ
15原子%≦a+b<40原子%、
0原子%<c≦20原子%であり、かつ
30原子%≦a+b+c≦55原子%、
を満足する。]で示される組成を有し、
△Tx=Tx-Tg(ただし、Txは、結晶化開始温度、Tgはガラス遷移温度を示す。)の式で表
わされる過冷却液体領域△Txが40K以上、Tg/Tl(ただし、Tlは、合金の液相線温度を
示す。)の式で表わされる換算ガラス化温度が0.56以上であり、非晶質相を体積百分
率で80%以上含む、圧縮強度が2800MPa以上の高強度と塑性加工性を有することを
特徴とするNi基金属ガラス合金。
An alloy made by a mold casting method,
Formula: Ni 100- abc Ta a Ti b (Zr, Hf) c [wherein a, b, c are atomic%,
5 atomic% ≦ a ≦ 35 atomic%,
5 atomic% ≦ b <35 atomic% and 15 atomic% ≦ a + b <40 atomic%,
0 atomic% <c ≦ 20 atomic% and 30 atomic% ≦ a + b + c ≦ 55 atomic%,
Satisfied. Have a composition represented by,
ΔTx = Tx−Tg (where Tx is the crystallization start temperature and Tg is the glass transition temperature)
Tg / Tl (where Tl is the liquidus temperature of the alloy)
Show. The conversion vitrification temperature represented by the formula of) is 0.56 or more, contains an amorphous phase in a volume percentage of 80% or more, and has high strength and plastic workability with a compressive strength of 2800 MPa or more.
Characteristic Ni-based metallic glass alloy.
金型鋳造法により作製された合金であって、
式 :Ni100−a−b−d TaTiNb[式中、a,b,は原子%で、
5原子%≦a≦35原子%、
5原子%≦b<35原子%、かつ
15原子%≦a+b<40原子%、
0原子%<d<35原子%であり、かつ
30原子%≦a+b+d≦55原子%、
を満足する。]で示される組成を有し、
△Tx=Tx-Tg(ただし、Txは、結晶化開始温度、Tgはガラス遷移温度を示す。)の式で表
わされる過冷却液体領域△Txが40K以上、Tg/Tl(ただし、Tlは、合金の液相線温度を
示す。)の式で表わされる換算ガラス化温度が0.56以上であり、非晶質相を体積百分
率で80%以上含む、圧縮強度が2800MPa以上の高強度と塑性加工性を有することを
特徴とするNi基金属ガラス合金。
An alloy made by a mold casting method,
Formula: Ni 100-a- b-d Ta a Ti b Nb d [ wherein, a, b, d in atomic%,
5 atomic% ≦ a ≦ 35 atomic%,
5 atomic% ≦ b <35 atomic% and 15 atomic% ≦ a + b <40 atomic%,
0 atomic% <d <35 atomic% and 30 atomic% ≦ a + b + d ≦ 55 atomic%,
Satisfied. Have a composition represented by,
ΔTx = Tx−Tg (where Tx is the crystallization start temperature and Tg is the glass transition temperature)
Tg / Tl (where Tl is the liquidus temperature of the alloy)
Show. The conversion vitrification temperature represented by the formula of) is 0.56 or more, contains an amorphous phase in a volume percentage of 80% or more, and has high strength and plastic workability with a compressive strength of 2800 MPa or more.
Characteristic Ni-based metallic glass alloy.
金型鋳造法により作製された合金であって、
式 :Ni100−a−b−c− TaTi (Zr,Hf)Nb[式中、a, b,
c, dは原子%で、
5原子%≦a≦35原子%、
5原子%≦b<35原子%、かつ
15原子%≦a+b<40原子%、
0原子%<c≦20原子%、
0原子%≦d<35原子%であり、か
30原子%≦a+b +c+≦ 55原子%、
を満足する。]で示される組成を有し、
△Tx=Tx-Tg(ただし、Txは、結晶化開始温度、Tgはガラス遷移温度を示す。)の式で表
わされる過冷却液体領域△Txが40K以上、Tg/Tl(ただし、Tlは、合金の液相線温度を
示す。)の式で表わされる換算ガラス化温度が0.56以上であり、非晶質相を体積百分
率で80%以上含む、圧縮強度が2800MPa以上の高強度と塑性加工性を有することを
特徴とするNi基金属ガラス合金。
An alloy made by a mold casting method,
Formula: Ni 100-a-b-c- d Ta a Ti b (Zr, Hf) c Nb d [where a, b,
c and d are atomic%,
5 atomic% ≦ a ≦ 35 atomic%,
5 atomic% ≦ b <35 atomic% and 15 atomic% ≦ a + b <40 atomic%,
0 atomic% <c ≦ 20 atomic%,
0 atomic% ≦ d <35 atom% der is, whether One <br /> 30 atomic% ≦ a + b + c + d ≦ 55 atomic%,
Satisfied. Have a composition represented by,
ΔTx = Tx−Tg (where Tx is the crystallization start temperature and Tg is the glass transition temperature)
The supercooled liquid region ΔTx is over 40K, Tg / Tl (where Tl is the liquidus temperature of the alloy)
Show. The conversion vitrification temperature represented by the formula of) is 0.56 or more, contains an amorphous phase in a volume percentage of 80% or more, and has high strength and plastic workability with a compressive strength of 2800 MPa or more.
Characteristic Ni-based metallic glass alloy.
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