JP2003201544A - Free-cutting, low thermal expansion material - Google Patents
Free-cutting, low thermal expansion materialInfo
- Publication number
- JP2003201544A JP2003201544A JP2002001237A JP2002001237A JP2003201544A JP 2003201544 A JP2003201544 A JP 2003201544A JP 2002001237 A JP2002001237 A JP 2002001237A JP 2002001237 A JP2002001237 A JP 2002001237A JP 2003201544 A JP2003201544 A JP 2003201544A
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- Prior art keywords
- sol
- thermal expansion
- free
- low thermal
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、被削性に優れた低
熱膨張材料に関するものである。TECHNICAL FIELD The present invention relates to a low thermal expansion material excellent in machinability.
【０００２】[0002]
【従来の技術】FeにNiを加えていくと熱膨張係数は急激
に変化し、Niを質量％で36％含有させたインバー合金の
組成で熱膨張係数は最小となる。このような低熱膨張材
料としては、インバー合金のNiの一部をCoで置換して一
層の低熱膨張化を図ったスーパーインバー合金や、ガラ
スやセラミックスの熱膨張係数にほぼ一致させたFe-29N
i-18Co合金等の封着合金が知られている。近年、エレク
トロニクスや半導体関連、またレーザー加工機や超精密
加工機器の部品材料として、熱的に安定なインバー合金
や、スーパーインバー合金が使用されるようになってき
ており、その需要量は日増しに増加している。また、セ
ラミックスと金属の接着、複合化も盛んに行われてい
て、封着合金に対する需要も高い。2. Description of the Related Art The coefficient of thermal expansion changes rapidly when Ni is added to Fe, and the coefficient of thermal expansion becomes the minimum in the composition of Invar alloy containing 36% by mass of Ni. As such a low thermal expansion material, a part of Ni of the Invar alloy is replaced with Co to achieve a further low thermal expansion, or Fe-29N which is made to substantially match the thermal expansion coefficient of glass or ceramics.
Sealing alloys such as i-18Co alloy are known. In recent years, thermally stable Invar alloys and Super Invar alloys have been used as parts materials for electronics, semiconductors, laser processing machines and ultra-precision processing equipment, and their demand is increasing day by day. Is increasing. In addition, ceramics and metals are actively bonded and compounded, and the demand for sealing alloys is high.
【０００３】しかしながら上記のインバー、スーパーイ
ンバー合金などのFe-Ni系材料またはFe-Ni-Co系材料
（以下Fe-Ni-(Co)系材料）は軟質であることから、切削
加工やドリル加工を施した時に、被削面の表面がむしれ
た状態になり易く、バリの発生も大きい。さらに工具磨
耗も大きく、工具寿命が短いため、Fe-Ni-(Co)系材料の
被削性改善が望まれていた。この合金の被削性を改善す
る手法として、Pb,S,Ti,W等各種微量元素を添加する方
法が提案されている。However, since the Fe-Ni-based materials or Fe-Ni-Co-based materials (hereinafter Fe-Ni- (Co) -based materials) such as the above-mentioned Invar and Super Invar alloys are soft, they are cut or drilled. When subjected to, the surface of the work surface is likely to be peeled off, and burr is generated greatly. Further, since the tool wear is large and the tool life is short, improvement in machinability of Fe-Ni- (Co) -based materials has been desired. As a method for improving the machinability of this alloy, a method of adding various trace elements such as Pb, S, Ti, W has been proposed.
【０００４】たとえば特開昭61-13367号公報では、Fe-N
i-Co系材料にPb:0.05〜0.50％添加することにより、被
削性を改善した封着合金の提案がなされている。特開平
4-246155号公報では快削元素としてSを0.01〜0.50％添
加している。ただ単にSを添加するだけでは低融点のニ
ッケルサルファイドを形成し熱間加工性を阻害すると考
えられており、Sと結合力の強いTiを0.05〜2.5％添加し
Ti-Sを形成させることによって低融点のニッケルサルフ
ァイドの形成を抑制する。この場合、Ti/S比：0.7〜5.0
の範囲にする必要がある。特開平11-279707号公報では
快削元素として、W:0.5〜7％添加を提案している。さら
にS及び、又はSeとMn、Caとを一定の範囲で添加するこ
とにより、サルファイド及びセレナイドを形成し被削性
を改善させている。For example, in Japanese Patent Laid-Open No. 61-13367, Fe-N
Proposal of a sealing alloy with improved machinability has been made by adding Pb: 0.05 to 0.50% to an i-Co-based material. Kohei
In JP-A 4-246155, 0.01 to 0.50% of S is added as a free-cutting element. It is believed that simply adding S will form nickel sulfide with a low melting point and impede hot workability, and adding 0.05 to 2.5% of S, which has a strong binding force, to Ti.
By forming Ti-S, formation of low melting point nickel sulfide is suppressed. In this case, Ti / S ratio: 0.7-5.0
Must be in the range. JP-A-11-279707 proposes addition of W: 0.5 to 7% as a free-cutting element. Further, by adding S and / or Se and Mn and Ca in a certain range, sulfide and selenide are formed and machinability is improved.
【０００５】[0005]
【発明が解決しようとする課題】上述した特開昭61-133
67号公報に開示されるPb添加合金は、被削性改善には効
果があるものの、毒性が強いために、これらの元素を添
加するには特別な設備を必要とし、また熱間加工性が著
しく阻害される。Sは快削元素としてよく利用される元
素であり、Mnと結びつきMnSとして被削性を改善する。
ただし、Sは結晶粒界に偏析しやすく熱間加工性を阻害
する。特開平4-246155号公報はS添加合金の熱間加工性
を改善するためにTiを添加しているが、Sが介在物とし
て存在するために、粗大化すると仕上げ表面の欠陥とな
り、めっき性を阻害する。微量元素を添加し介在物を形
成して被削性を改善する方法は、製造方法により介在物
が粗大化しやすく、めっき性を阻害するため、実用化す
る上で大きな問題となる。また特開平11-279707号公報
のようにWを快削元素として添加する場合は、添加量が
多いため熱膨張係数が大きくなり、所望の低熱膨張特性
が得られなくなる。本発明の目的は、Fe-Ni-(Co)系材料
の被削性を解決し、さらにめっき性の優れた低熱膨張材
料を提供することである。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Although the Pb-added alloy disclosed in Japanese Patent Publication No. 67 is effective in improving machinability, it is highly toxic, so special equipment is required to add these elements, and hot workability is high. Remarkably disturbed. S is an element that is often used as a free-cutting element, and is combined with Mn to improve machinability as MnS.
However, S tends to segregate at the grain boundaries and hinders hot workability. In JP-A-4-246155, Ti is added to improve the hot workability of the S-added alloy, but since S is present as an inclusion, coarsening causes defects on the finished surface, resulting in plating properties. Inhibit. The method of adding a trace element to form inclusions to improve machinability is a big problem in practical use because inclusions are likely to coarsen due to the manufacturing method and hinder plating properties. Further, when W is added as a free-cutting element as in JP-A-11-279707, the thermal expansion coefficient becomes large due to the large addition amount, and desired low thermal expansion characteristics cannot be obtained. An object of the present invention is to solve the machinability of Fe-Ni- (Co) based materials and to provide a low thermal expansion material having excellent plating properties.
【０００６】[0006]
【課題を解決するための手段】本発明者は、Fe-Ni-(Co)
系材料の被削性の問題を検討し、従来の介在物を利用す
る方法に頼らないで、被削性を改善できる方法を見出し
本発明に至った。本発明では合金中に固溶状態で存在す
るAlであって、酸に可溶な、所謂sol.Al（soluble A
l）を増量することにより、工具磨耗が大きく低減され
ることを確認した。加えて、本発明では介在物に依存し
ないので、めっき性を損うこともない。Means for Solving the Problems The present inventors have found that Fe-Ni- (Co)
The present invention has been accomplished by studying the problem of machinability of a system material and finding a method that can improve the machinability without relying on the conventional method of utilizing inclusions. In the present invention, Al which exists in a solid solution state in the alloy and is soluble in acid, so-called sol.
It was confirmed that tool wear was significantly reduced by increasing l). In addition, since the present invention does not depend on inclusions, the plating property is not impaired.
【０００７】すなわち本発明は、Fe-Ni系材料またはFe-
Ni-Co系材料であってsol.Al量を0.01〜0.1質量％に調整
することで快削性を付与した快削性低熱膨張材料であ
る。That is, the present invention is based on Fe-Ni-based materials or Fe-
It is a Ni-Co based free-cutting low thermal expansion material that is given a free-cutting property by adjusting the sol.Al content to 0.01 to 0.1 mass%.
【０００８】また、質量％でNi:25〜55％、Al:0.01〜0.
1％、残部は実質的にFeの組成からなり、sol.Al:0.01〜
0.1％、（Al-sol.Al)≦0.01である快削性低熱膨張材料
である。また、質量％でNi:25〜55％、Co:20％以下、A
l:0.01〜0.1％、残部は実質的にFeの組成からなり、so
l.Al:0.01〜0.1％、（Al-sol.Al)≦0.01である快削性低
熱膨張材料である。Further, in mass%, Ni: 25-55%, Al: 0.01-0.
1%, the balance consists essentially of Fe composition, sol.Al:0.01〜
It is a free-cutting low thermal expansion material with 0.1% and (Al-sol.Al) ≦ 0.01. In addition, Ni: 25 to 55% by mass%, Co: 20% or less, A
l: 0.01-0.1%, the balance consists essentially of Fe composition, so
l.Al: 0.01-0.1%, (Al-sol.Al) ≦ 0.01, which is a free-cutting low thermal expansion material.
【０００９】好ましくは、質量％でO:0.005%以下とす
る。より好ましくは、Siを質量％で0.1〜0.5％含有す
る。また本発明では、めっき性を阻害しない範囲で介在
物の効果を併用することもできる。例えば、質量％でS:
0.02％以下、Mn:1％以下、Ti:0.01〜0.05％の添加も可
能である。Preferably, the content of O is 0.005% or less in mass%. More preferably, Si is contained in an amount of 0.1 to 0.5% by mass. Further, in the present invention, the effect of inclusions may be used together within the range where plating properties are not impaired. For example, in mass% S:
It is also possible to add 0.02% or less, Mn: 1% or less, and Ti: 0.01 to 0.05%.
【００１０】[0010]
【発明の実施の形態】本発明者の検討によればAlを固溶
状態でFe-Ni-(Co)系材料中に存在させた場合、すなわち
sol.Alとして存在させた場合には、被削性が改善する。
Fe-Ni-(Co)系材料におけるsol.Alによる被削性改善のメ
カニズムは未だ明らかでないが、sol.Alが被削面の工具
との界面で反応し、Al系の反応物を工具表面に形成し、
潤滑、保護膜作用を付与すると考えられる。DETAILED DESCRIPTION OF THE INVENTION According to the study of the present inventor, when Al is present in a Fe-Ni- (Co) -based material in a solid solution state, that is,
When present as sol.Al, machinability is improved.
The mechanism of improving the machinability of Fe-Ni- (Co) based materials by sol.Al is not clear yet, but sol.Al reacts at the interface with the tool on the machined surface, and the Al-based reaction product on the tool surface Formed,
It is considered to impart a lubricating and protective film action.
【００１１】このsol.Alによる効果を得るにはsol.Alを
0.01％以上に調整する必要がある。一方sol.Alを0.1％
を越えて調整すると、熱膨張係数が大きくなり所望の熱
膨張係数が得られなくなるため、上限を0.1％とした。
より好ましいsol.Alの含有量は0.05〜0.01%である。so
l.Alの調整は不純物酸素量の低減や、Alより酸素との親
和力の高い元素の添加、介在物の固溶を目的とした高温
拡散処理などにより行うことが出来る。また、めっき性
に悪影響を及ぼす要因は材料表面に顕在化している介在
物であるが、固溶状態で存在しているAlは、めっき性に
は影響を及ぼさない。よって、本発明によれば、Fe−Ni
系材料のめっき性を低減することなく被削性を改善する
ことが出来る。To obtain the effect of sol.Al, sol.Al
It is necessary to adjust it to 0.01% or more. On the other hand, sol.Al is 0.1%
If it is adjusted to exceed the above range, the coefficient of thermal expansion becomes large and the desired coefficient of thermal expansion cannot be obtained, so the upper limit was made 0.1%.
A more preferable sol.Al content is 0.05 to 0.01%. so
l.Al can be adjusted by reducing the amount of oxygen in impurities, adding an element having a higher affinity for oxygen than Al, and performing high temperature diffusion treatment for the purpose of forming a solid solution of inclusions. Further, a factor that adversely affects the plating property is an inclusion that is apparent on the surface of the material, but Al existing in a solid solution state does not affect the plating property. Therefore, according to the present invention, Fe-Ni
The machinability can be improved without reducing the plating property of the system material.
【００１２】次に、より具体的な組成を開示した発明で
ある、質量％でNi:25〜55％、Al:0.01〜0.1％、残部は
実質的にFeの組成からなり、sol.Al:0.01〜0.1％、（Al
-sol.Al)≦0.01である快削性低熱膨張材料について説明
する。NiはFeとの合金化により熱膨張係数を低減する基
本的な構成元素であるがNi:25〜55質量％含有すること
で熱膨張係数を所望の値に低減することができる。Alは
sol.Alを形成するために必要な元素であり0.01％以上添
加する。一方、多量に添加するとsol.Alの形成量に対す
るアルミナの形成量が増大し、材料の被削性を低下す
る。よってAlの添加量は0.1％以下とする
sol.Alの規定理由、好ましい範囲は前記の本発明と同じ
であるが、AlはFe-Ni-(Co)系材料中で、主にsol.Alまた
はアルミナとして存在し、アルミナは2000HV以上の硬質
な介在物であるため、工具を機械的に磨耗させる。また
アルミナが存在すると被削性も低下させる。よってsol.
Al以外のAlの量は0.01％以下、すなわち（Al-sol.Al)≦
0.01とする。なお（Al-sol.Al)≦0.005に制御すること
が好ましい。Next, according to the invention which discloses a more specific composition, Ni: 25 to 55% by mass%, Al: 0.01 to 0.1%, and the balance substantially consisting of Fe, sol.Al: 0.01-0.1%, (Al
The free-cutting low thermal expansion material with -sol.Al) ≤ 0.01 will be described. Ni is a basic constituent element that reduces the thermal expansion coefficient by alloying with Fe, but the thermal expansion coefficient can be reduced to a desired value by containing Ni: 25 to 55 mass%. Al is
It is an element necessary for forming sol.Al and is added by 0.01% or more. On the other hand, when added in a large amount, the amount of alumina formed increases with respect to the amount of sol.Al formed, and the machinability of the material deteriorates. Therefore, the added amount of Al is 0.1% or less stipulation reason of sol.Al, the preferred range is the same as the above-mentioned present invention, but Al is Fe-Ni- (Co) -based material, mainly sol.Al. Or, it exists as alumina, and since alumina is a hard inclusion of 2000 HV or more, the tool is mechanically worn. The presence of alumina also reduces machinability. Therefore sol.
The amount of Al other than Al is 0.01% or less, that is, (Al-sol.Al) ≦
Set to 0.01. It is preferable to control (Al-sol.Al) ≦ 0.005.
【００１３】また上記Niの一部をCoで置換し、質量％で
Ni:25〜55％、Al:0.01〜0.1％、残部は実質的にFeの組
成からなるFe-Ni-Co系材料においても、sol.Al:0.01〜
0.1％、（Al-sol.Al)≦0.01とすることで上記のFe-Ni合
金と同様の効果が得られる。NiとCoの置換の割合は必要
とする熱膨張係数に応じて、上記の範囲内で適宜定めれ
ばよい。Further, by substituting a part of Ni for Co, and by mass%
Ni: 25-55%, Al: 0.01-0.1%, balance: Fe-Ni-Co-based material consisting essentially of Fe, sol.Al: 0.01-
By setting 0.1% and (Al-sol.Al) ≦ 0.01, the same effect as that of the Fe-Ni alloy can be obtained. The substitution ratio of Ni and Co may be appropriately determined within the above range according to the required thermal expansion coefficient.
【００１４】なお、以上の本発明で規定するsol.Alの含
有量は、JIS G1257付属書15に記載の方法により測定す
ることができる。The content of sol.Al specified in the present invention can be measured by the method described in JIS G1257 Appendix 15.
【００１５】上記本発明の合金において、好ましい添加
元素とその添加量、及び不純物量について以下に述べ
る。
O:0.005％以下
Oは不可避的に含有する不純物でありAlと結合するとア
ルミナを生成する。アルミナを生成すると、それ自身が
硬質であるため工具の磨耗を促進するばかりではなく、
被削性改善に有効なsol.Alを低減するので、被削性を阻
害する。Oは0.005％以下に低減することが好ましい。よ
り好ましくは0.003%以下である。In the alloy of the present invention described above, preferable additional elements, their addition amounts, and impurity amounts will be described below. O: 0.005% or less O is an unavoidable impurity and forms alumina when combined with Al. Alumina not only promotes tool wear due to its hardness, but also
Since sol.Al, which is effective in improving machinability, is reduced, machinability is hindered. O is preferably reduced to 0.005% or less. It is more preferably 0.003% or less.
【００１６】Si:0.1〜0.5％
Siは固溶状態で被削性を改善する効果があるため添加す
ることが出来る。Siは切屑表面にSi含有量の高い酸化物
を形成する。高速切削加工では、切屑表面温度が1000〜
1200℃位にまで加熱されるが、切屑表面に形成したSi含
有量の高い酸化物の融点はこの温度より低いため、溶融
して工具表面に潤滑作用を付与して工具磨耗を抑える。
被削性改善のためSiを0.1％以上含有することが望まし
い。0.5％を越えると熱膨張係数が悪くなるために、上
限を0.5％とすることが好ましい。Si: 0.1 to 0.5% Si can be added because it has an effect of improving machinability in a solid solution state. Si forms an oxide with a high Si content on the surface of chips. In high-speed cutting, chip surface temperature is 1000 ~
Although it is heated to around 1200 ° C, the melting point of the oxide with a high Si content formed on the chip surface is lower than this temperature, so it melts and imparts a lubricating action to the tool surface to suppress tool wear.
It is desirable to contain Si in an amount of 0.1% or more to improve machinability. If it exceeds 0.5%, the coefficient of thermal expansion becomes worse, so the upper limit is preferably made 0.5%.
【００１７】S:0.02％以下、Mn:1％以下、Ti:0.05％以
下
Sは快削元素として用いられる元素であり微量の添加でM
nと化合物を形成し被削性を向上することが出来る。MnS
の形成はめっき性を低減するが、固溶Alとの効果を併用
することで、被削性を一層改善することができる。しか
し多量に入れ過ぎると、粗大なMnSが増えてめっき性が
大幅に阻害されるため、Sを0.02％以下、Mnを1％以下で
含有することが好ましい。また単にS、Mnを添加すると
粗大なMnSが形成され易いので、Tiを0.05%以下含有する
ことが好ましい。上限を0.05％とするのは0.05％を越え
ると熱膨張係数を悪くするからである。なお、Tiは0.01
%以上含有することで効果が特に明確となり好ましい。S: 0.02% or less, Mn: 1% or less, Ti: 0.05% or less S is an element used as a free-cutting element.
Machinability can be improved by forming a compound with n. MnS
However, the machinability can be further improved by using the effect of solute Al together. However, if too much is added, coarse MnS increases and the plating properties are significantly impaired. Therefore, it is preferable to contain S in an amount of 0.02% or less and Mn in an amount of 1% or less. Further, if S and Mn are simply added, coarse MnS is likely to be formed, so it is preferable to contain Ti at 0.05% or less. The upper limit is set to 0.05% because if it exceeds 0.05%, the coefficient of thermal expansion deteriorates. Note that Ti is 0.01
When the content is at least%, the effect becomes particularly clear, which is preferable.
【００１８】[0018]
【実施例】表１に示す成分組成よりなる溶鋼を真空溶解
で10kgの鋼塊にした後、熱間加工で5mm×150mmの板に仕
上げた。その後850℃のプレス焼鈍を行い、表面の黒皮
をフライス加工により除去した。切削試験はTiAlN被膜
超硬合金製２枚刃φ８エンドミルを用いて、深さ2.5mm
の溝切削を行った。切削速度は50m/min、100m/minの２
条件にて行い、いずれも水溶性エマルジョンをクーラン
トに用い、送り速度0.015mm/刃で切削試験を行い、エン
ドミルの磨耗量を評価した。5m切削試験後の境界磨耗量
を表２に示す。なお、本実施例においてsol.Al量、およ
び全Al量の測定は、JIS G1257付属書１４、１５に準拠
して行った。Example A molten steel having the composition shown in Table 1 was melted in vacuum into a steel ingot of 10 kg and then hot-worked to a plate of 5 mm × 150 mm. After that, press annealing was performed at 850 ° C., and the black skin on the surface was removed by milling. The cutting test uses a TiAlN coated cemented carbide 2-flute φ8 end mill with a depth of 2.5 mm.
The groove was cut. Cutting speed is 50m / min, 100m / min 2
Under the conditions, a water-soluble emulsion was used as a coolant in each case, and a cutting test was performed at a feed rate of 0.015 mm / blade to evaluate the wear amount of the end mill. Table 2 shows the amount of boundary wear after the 5 m cutting test. In this example, the sol.Al amount and the total Al amount were measured in accordance with JIS G1257 Annex 14 and 15.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】めっき性は脱脂、酸処理後、厚さ0.5μmの
ストライクめっきを施し、その上に厚さ3μmのAgめっき
を施した後、450℃で5分間、大気中で加熱し、めっき膨
れの無いものを○、膨れの生じたものを×で評価する。The plating property is degreasing, acid treatment, strike plating with a thickness of 0.5 μm, Ag plating with a thickness of 3 μm, and then heating in air at 450 ° C. for 5 minutes to swell the plating. The case where there is no mark is evaluated as ○, and the case where swelling occurs is evaluated as ×.
【００２２】No.1はsol.Al量の少ない通常のFe-Ni-Co系
合金でありエンドミルの磨耗量は大きい。No.2〜No.6は
本発明の合金の範囲内でsol.Al量を増量したものであ
る。sol.Al量の増量と伴に磨耗量が少なくなり、被削性
が改善されている。No.7は酸素量が高く、アルミナ系の
介在物がやや多くなっている。またsol.Al量が少なくな
っており、本発明の中では比較的被削性改善の効果が小
さい。No.8はAlに加えて、さらにSiを増量したものであ
る。高速切削でさらにエンドミルの磨耗量が抑制されて
おり、被削性改善に効果がある。No.9はS量を増量しMnS
により被削性の改善を図ったものであるが、Tiと複合添
加によりMnSは微細分散している。エンドミル磨耗量は
少なくなり、被削性の改善に効果が大きい。また介在物
も微細分散しているため、めっき性も阻害されない。No. 1 is a normal Fe-Ni-Co alloy having a small amount of sol.Al and has a large wear amount in the end mill. No. 2 to No. 6 are obtained by increasing the amount of sol.Al within the range of the alloy of the present invention. As the amount of sol.Al increases, the amount of wear decreases and the machinability improves. No. 7 has a high oxygen content and a little more alumina-based inclusions. Further, the amount of sol.Al is small, and the effect of improving the machinability is relatively small in the present invention. No. 8 is the one in which Si is further increased in addition to Al. High-speed cutting further suppresses the wear of the end mill, which is effective in improving machinability. No. 9 has an increased amount of S and MnS
Although the machinability is improved by MnS, MnS is finely dispersed by the combined addition of Ti. The amount of wear of the end mill is small, and it is effective in improving machinability. Also, since the inclusions are finely dispersed, the plating property is not impaired.
【００２３】No.10はS添加のみにより被削性を改善した
ものである。低速切削側では磨耗量の低減に効果がある
が、高速では被削性改善の効果は小さい。また粗大なMn
Sの介在物量が多く、この介在物が原因となりめっき膨
れが発生する。図１にsol.Alにより被削性を改善した本
発明のNo.3と、S添加によるNo.10の試料の表面を10%ナ
イタールで腐食した後のミクロ組織を示す。No.10では
最大で25μm程度の介在物が析出しているが、本発明のN
o.3ではそのような介在物の析出は見られない。No.11〜
No.13はそれぞれ、インバー合金、スーパーインバー合
金、42％Ni合金にAlを添加したもので、エンドミル磨耗
量が少なく、Al添加はこれらの低熱膨張材料にも被削性
改善に効果がある。No. 10 has improved machinability only by adding S. The low-speed cutting side is effective in reducing the amount of wear, but the high-speed cutting is less effective in improving machinability. Also coarse Mn
The amount of inclusions of S is large, and plating swelling occurs due to these inclusions. FIG. 1 shows No. 3 of the present invention whose machinability was improved by sol.Al, and the microstructures of No. 10 samples with S addition after corroding the surface with 10% nital. In No. 10, inclusions with a maximum size of about 25 μm are precipitated.
No precipitation of such inclusions is observed in o.3. No. 11 ~
No. 13 is an Invar alloy, a Super Invar alloy, and 42% Ni alloy with Al added, and the end mill wear amount is small, and addition of Al is effective for improving the machinability of these low thermal expansion materials.
【００２４】[0024]
【発明の効果】本発明によれば、Fe-Ni-(Co)系低熱膨張
材料のめっき性を損わずに被削性を飛躍的に改善するこ
とができ、各種精密部品の実用化にとって欠くことので
きない技術となる。According to the present invention, the machinability can be dramatically improved without impairing the plating property of the Fe-Ni- (Co) -based low thermal expansion material, and for practical application of various precision parts. It will be an indispensable technology.
【図１】本発明と比較例のミクロ組織の一例を示す光学
顕微鏡写真である。FIG. 1 is an optical micrograph showing an example of microstructures of the present invention and a comparative example.
Claims (6)
ってsol.Al量を0.01〜0.1質量％に調整することで快削
性を付与したことを特徴とする快削性低熱膨張材料。1. Fe-Ni-based material or Fe-Ni-Co-based material, which is characterized by imparting free-cutting property by adjusting the sol.Al amount to 0.01 to 0.1% by mass. Low thermal expansion material.
％、残部は実質的にFeの組成からなり、sol.Al:0.01〜
0.1％、（Al-sol.Al)≦0.01であることを特徴とする快
削性低熱膨張材料。2. Mass% Ni: 25-55%, Al: 0.01-0.1
%, The balance consists essentially of Fe, and sol.Al:0.01〜
Free-cutting low thermal expansion material characterized by 0.1% and (Al-sol.Al) ≦ 0.01.
l:0.01〜0.1％、残部は実質的にFeの組成からなり、so
l.Al:0.01〜0.1％、（Al-sol.Al)≦0.01であることを特
徴とする快削性低熱膨張材料。3. Ni: 25 to 55% by mass%, Co: 20% or less, A
l: 0.01-0.1%, the balance consists essentially of Fe composition, so
l.Al: 0.01 to 0.1%, (Al-sol.Al) ≦ 0.01, a free-cutting low thermal expansion material.
とする請求項２または３に記載の快削性低熱膨張材料。4. The free-cutting low thermal expansion material according to claim 2, wherein O: 0.005% or less in mass%.
特徴とする請求項２乃至４の何れかに記載の快削性低熱
膨張材料。5. The free-cutting low thermal expansion material according to any one of claims 2 to 4, wherein Si: 0.1 to 0.5% by mass is added.
i:0.05％以下添加することを特徴とする請求項２乃至５
の何れかに記載の快削性低熱膨張材料。6. Mass% S: 0.02% or less, Mn: 1% or less, T
i: 0.05% or less is added, 6.
The free-cutting low thermal expansion material according to any one of 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009057731A1 (en) * | 2007-10-29 | 2009-05-07 | Nippon Steel Corporation | Martensitic non-heat-treated steel for hot forging and non-heat-treated steel hot forgings |
| WO2017184771A1 (en) * | 2016-04-20 | 2017-10-26 | Arconic Inc. | Fcc materials of aluminum, cobalt, iron and nickel, and products made therefrom |
-
2002
- 2002-01-08 JP JP2002001237A patent/JP4123467B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009057731A1 (en) * | 2007-10-29 | 2009-05-07 | Nippon Steel Corporation | Martensitic non-heat-treated steel for hot forging and non-heat-treated steel hot forgings |
| US9376738B2 (en) | 2007-10-29 | 2016-06-28 | Nippon Steel & Sumitomo Metal Corporation | Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part |
| US9487848B2 (en) | 2007-10-29 | 2016-11-08 | Nippon Steel & Sumitomo Metal Corporation | Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part |
| WO2017184771A1 (en) * | 2016-04-20 | 2017-10-26 | Arconic Inc. | Fcc materials of aluminum, cobalt, iron and nickel, and products made therefrom |
| CN109072347A (en) * | 2016-04-20 | 2018-12-21 | 奥科宁克有限公司 | Aluminium, cobalt, the FCC material of iron and nickel and the product that is made from it |
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