EP1431409B1 - Alliage de décolletage - Google Patents

Alliage de décolletage Download PDF

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Publication number
EP1431409B1
EP1431409B1 EP04004043A EP04004043A EP1431409B1 EP 1431409 B1 EP1431409 B1 EP 1431409B1 EP 04004043 A EP04004043 A EP 04004043A EP 04004043 A EP04004043 A EP 04004043A EP 1431409 B1 EP1431409 B1 EP 1431409B1
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Prior art keywords
mass
alloy
content
machinability
range
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EP04004043A
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German (de)
English (en)
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EP1431409A1 (fr
Inventor
Kiyohito Ishida
Katsunari Oikawa
Takashi c/o Tohoku Tokushuko K.K. Ebata
Takayuki Inoguchi
Tetsuya Shimizu
Michio Okabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daido Steel Co Ltd
Tohoku Tokushuko KK
Tohoku Steel Co Ltd
Tohoku Techno Arch Co Ltd
Japan Research Industries and Industrial Technology Association (JRIA)
Original Assignee
Daido Steel Co Ltd
Tohoku Tokushuko KK
Tohoku Steel Co Ltd
Tohoku Techno Arch Co Ltd
Japan Research Industries and Industrial Technology Association (JRIA)
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Priority claimed from JP2000070257A external-priority patent/JP3425114B2/ja
Priority claimed from JP2000221433A external-priority patent/JP3425124B2/ja
Priority claimed from JP2000251626A external-priority patent/JP3425129B2/ja
Priority claimed from JP2000251602A external-priority patent/JP3425128B2/ja
Application filed by Daido Steel Co Ltd, Tohoku Tokushuko KK, Tohoku Steel Co Ltd, Tohoku Techno Arch Co Ltd, Japan Research Industries and Industrial Technology Association (JRIA) filed Critical Daido Steel Co Ltd
Publication of EP1431409A1 publication Critical patent/EP1431409A1/fr
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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
    • 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%
    • 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
    • C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
    • 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
    • C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Definitions

  • a free cutting alloy excellent in machinability is, in a case, selected for improvement of productivity.
  • free cutting alloy containing an element improving machinability such as S, Pb, Se or Bi (hereinafter referred to as machinability-improving element) is widely used.
  • machinability-improving element an element improving machinability such as S, Pb, Se or Bi
  • JP 60155653 enables the production of an iron-base super alloy having excellent high temperature strength, toughness and high temperature ductility by melting an Ni-Cr alloy steel in a vacuum atmosphere, decreasing considerably the content of oxygen and hydrogen and adding a specific desulfurizing agent to decrease the content of S.
  • an object of the present invention is to provide free cutting alloy excellent in machinability, showing outstanding characteristics as an alloy such as corrosion resistivity, hot workability and cold workability or specific magnetic characteristics, which are comparable to those of conventional alloys.
  • a free cutting alloy of the present invention is characterized by the free cutting alloy of claim 1.
  • " (Ti,Zr)" means one or two of Ti and Zr.
  • Machinability of an alloy can be improved by forming the above described (Ti, Zr) based compound in a matrix metal phase of the alloy. Furthermore, by forming this compound in the alloy, formation of compounds such as MnS and CMn,Cr)S, easy to reduce corrosion resistivity and hot workability of the alloy, can be prevented or suppressed, thereby enabling corrosion resistivity, hot workability and cold workability to be retained at good levels. That is, according to the present invention, a free cutting alloy excellent in machinability can be realized without any degradation in useful characteristics as an alloy such as hardness, corrosion resistivity, hot workability, cold workability and specific magnetic characteristics.
  • a (Ti,Zr) based compound formed in a free cutting alloy of the present invention is dispersed in the alloy structure. Machinability of an alloy can be further increased especially by dispersing the compound in an alloy structure.
  • a particle size of the (Ti,Zr) based compound as observed in the structure of a polished section of the alloy is preferably, for example, approximately in the range of 0.1 to 30 ⁇ m on the average and further, an area ratio of the compound in the structure is preferably in the range of 1 to 20 %, wherein the particle size is defined by the maximum distance between two parallel lines circumscribing a particle in observation when parallel lines are drawn intersecting on a region including the particle in observation while changing a direction of the parallel lines.
  • the above described (Ti,Zr) based alloy can include at least a compound expressed in a composition formula (Ti,Zr) 4 (S,Se,Te) 2 C 2 (hereinafter also referred to as carbo-sulfide/selenide), wherein one or more of Ti and Zr may be included in the compound and one or more of S, Se and Te may be included in the compound.
  • a compound in the form of the above described composition formula not only can machinability of an alloy be improved, but corrosion resistivity is also improved.
  • identification of a (Ti,Zr) based compound in an alloy can be performed by X-ray diffraction (for example, a diffractometer method), an electron probe microanalysis method (EPMA) and the like technique.
  • X-ray diffraction for example, a diffractometer method
  • EPMA electron probe microanalysis method
  • the presence or absence of the compound of (Ti,Zr) 4 (S,Se,Te) 2 C 2 can be confirmed according to whether or not a peak corresponding to the compound appear in a diffraction chart measured by an X-ray diffractometer.
  • a region in the alloy structure in which the compound is formed can also be specified by comparison between two-dimensional mapping results on characteristic X-ray intensities of Ti, Zr, S, Se or C obtained from a surface analysis by EPMA conducted on a section structure of the alloy.
  • the present invention to be concrete, can be preferably applied on an alloy constituted as stainless steel.
  • an alloy constituted as stainless steel.
  • such an alloy in order to form a (Ti,Zr) based compound without any degradation in characteristics as stainless steel, such an alloy preferably contains one or more of Ti and Zr such that W Ti + 0.52 W Zr fulfills the formula in claim 1, wherein W Ti and W Zr denote respective contents in mass % of Ti and Zr; and one or more of S, Se and Te. Reference is made to claim 1.
  • Ti and Zr are indispensable elements for forming a (Ti,Zr) based compound playing a central role in exerting the effect of improving machinability of a free cutting alloy of the present invention.
  • the above effect exerted when Ti and Zr are added into an alloy is determined by the sum of the numbers of atoms (or the sum of the numbers of values in mol), regardless of kinds of metals, Ti or Zr. Since a ratio between atomic weights is almost 1 : 0.52, Ti of a smaller atomic weight exerts a larger effect with a smaller mass.
  • a value of W Ti + 0.52 Wzr is said to be compositional parameter reflects the sum of the numbers of atoms of Zr and Ti included in an alloy.
  • the present invention can be preferably applied for (Fe, Ni) based electromagnetic alloy, (Fe, Ni) based heat resisting alloy and (Fe,Ni) based alloy such as Invar alloy, Elinvar alloy and the like with a small thermal expansion coefficient, a small thermal coefficient of an elastic modulus in room temperature, for use in precision machine parts (hereinafter referred to as a fifth selection invention).
  • Ni based electromagnetic alloy the alloy including 20 to 80 mass % Ni is generally used, and there can be exemplified as the alloy; for example, alloys called Permalloy or Perminver.
  • Ni heat resisting alloy including 40 to 80 mass % Ni is widely used.
  • the fifth selection invention of the present invention constituted as (Fe, Ni) based electromagnetic alloy, (Fe, Ni) based heat resisting alloy or the like can contain 20 to 82 mass % Ni; and the balance mainly consists of one or more of Fe and Cr; further containing: one or more of Ti and Zr in the range satisfying a relation of 0.05 ⁇ X ⁇ 3 (hereinafter referred to as a condition formula (1)), one or more of S, Se and Te in the range satisfying a relation of 0.01 ⁇ Y s 0.5 X (hereinafter referred to as a condition formula (2)), C in the range satisfying a relation of 0.2 Y ⁇ Wc ⁇ 0.3 (hereinafter referred to as a condition formula (3)), wherein when a Ti content is indicated by W Ti in mass %, a Zr content by Wzr in mass %, a C content by Wc in mass %, a S content by Ws mass %, a Se content by W Se and a Te content by W Te
  • the present inventors had findings that in (Fe, Ni) based alloy for use in electromagnetic material and/or heat resistant material (for example Ni or Fe based heat resistant alloy of a solid solution strengthening type), (Ti,Zr) based compound (for example, a compound in the form of (Ti,Zr) 4 (S,Se,Te) 2 C 2 )) is formed and thereby, machinability of the alloy is improved.
  • (Fe, Ni) based alloy for use in electromagnetic material and/or heat resistant material for example Ni or Fe based heat resistant alloy of a solid solution strengthening type
  • (Ti,Zr) based compound for example, a compound in the form of (Ti,Zr) 4 (S,Se,Te) 2 C 2
  • a free cutting alloy of the present invention with the following composition is excellent in machinability and hot workability without deterioration in excellent performances as electromagnetic material and/or heat resistant material, the composition being:
  • a free cutting alloy of the present invention can contain 12 mass % or lower Cr and moreover, 18 mass % or lower Co.
  • magneto-striction acts so as reduce a volume in company with reduction in spontaneous magnetization, which cancels thermal expansion in the ordinary sense.
  • 36 at % Ni-Fe alloy is generally called Invar alloy and a thermal expansion coefficient in the vicinity of environment temperature is very small, which makes the alloy find a practically important application.
  • the alloy is in many cases used in precision machine material such as of a spring for a measuring instrument. By adding Cr or Co to such an alloy, it is possible to effectively control a thermal expansion coefficient and an elastic constant and thereby, desired performances to match with an intended application can be attained.
  • the elements are not limited to the use in the controls.
  • Cr or Co are added in excess of the respective above described ranges, an unfavorably large change occurs in compositional conditions on the elements of Ti, Zr, S, Se, Te and C associated with formation of (Ti,Zr) 4 (S,Se,Te) 2 C 2 .
  • the Cr and Co contents are set to 12 mass % or lower and 18 mass % or lower, respectively.
  • an alloy composition means a composition in which part of Fe and Ni as main components is replaced with the elements of Ti, Zr, S, Se, C and the like effective for improvement on machinability in the compositional ranges defined in the present invention.
  • alloys under the trade names mean alloys specific to the present invention composed with the alloys of compositions under product specifications as a base only (it should be appreciated that the alloy compositions inherent in products under respective trade names are described in a literature (Revised 3 rd Version Kinzoku (Metal) Data Book published by Maruzen, p 223), therefore detailed description thereof is omitted):
  • test alloy relating to the present invention is referred to as inventive steel or inventive alloy, or as a selection inventive steel or a selection inventive alloy.
  • Fig. 1 shows an X-ray diffraction chart of a reference steel No. 5 by a diffractometer and Fig. 3 is an optical microphotograph of a reference steel specimen No. 5. Further, specimens Nos. 1 to 14 in Table 1 are kinds of steel corresponding to the reference steel and specimens Nos. 15 to 28 are kinds of steel as comparative examples.
  • a free cutting alloy of the present invention constituted with Ni based alloy used as (Fe,Ni) based electromagnetic material and (Fe,Ni) based heat resisting material (the fifth selection invention) was prepared in the following way to be applied to tests: First, Test alloy of various compositions in mass % shown in Tables 3, 4 and 5, which is 7 kg blocks, were molten in a high frequency furnace in an Ar stream to be formed into ingots of 80 mm in diameter. Then, the ingots were processed in hot forging at a temperature in the range of 950 to 1100°C into rods having a circle section, 24 mm in diameter. Thereafter, the rods were machined to a diameter of 23 mm, followed by cold rolling into a diameter of 22 mm, to obtain test alloys.
  • Example 1 identification of inclusions in the structure was performed by a method similar to Example 1 (Reference). While main inclusion in inventive steel of the present invention was (Ti,Zr) 4 (S,Se)C 2 , inclusions such as (Ti,Zr)S and (Ti,Zr)S 3 were locally recognized. A trace of (Mn,Cr)S was recognized in each of specimens Nos. 2, 14, 19, 29, 36, 39, 49 and 55, all having a high Mn content. An optical microphotograph of a specimen No. 30 of a third selection inventive alloy is shown in Fig. 5.
  • Ni based alloys of the compositions were evaluated on not only hot workability and machinability, but also characteristics required of Ni alloy among magnetic characteristics, a thermal expansion coefficient and an elastic constant. Evaluation methods for respective characteristics are as follows:
  • the fifth selection inventive alloy has hot workability better than the comparative alloys and the reference alloys have, regardless of a magnitude of each of contents of additive elements Si, Mn, Al and Mo, each in the range of 1 % or lower. This is considered because, in such conditions, since a percent of inclusions of carbo-sulfide based (Ti,Zr) 4 C 2 (S,Se,Te) 2 especially stable among sulfide based inclusions is large, formation of (Mn,Cr,Ni)S being a cause for hot-work cracking is controlled. This mechanism was confirmed by actual analysis on components of the inclusions. That is, it is found that machinability is improved in the inventive alloy of the present invention and moreover, not only machinability but also hot workability are improved in the fifth selection inventive alloy.
  • the fifth selection inventive alloy of the present invention to which Ti and Zr, and S, Se and Te are added so as to satisfy the condition formulae (1) to (3) has no reduction in hot workability and furthermore, almost no deterioration in functional performances inherited from the base alloy.
  • specimens Nos. 17 to 26 of fifth selection inventive alloys an effect of improving machinability can be attained even if Cr is added with 12 mass % as the upper limit.
  • specimens Nos. 20 to 23 of fifth selection inventive alloys with specimen No. 61 of a comparative alloy, as a base composition which is a constant-modulus alloy whose elastic characteristics are constant in the vicinity of room temperature, has not only good hot workability, but also greatly increased machinability, and in addition, a temperature coefficient of a Young's modulus is almost not affected either, thereby enabling use as constant modulus alloy in a proper manner.
  • Fig. 7 is a graph obtained by plotting a drill boring time on alloy in Example 2 against Y in mass %. As can be seen in the graph, when Y is less than 0.01 mass %, it is seen that a boring time tends to accelerate its increase.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Soft Magnetic Materials (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Powder Metallurgy (AREA)

Claims (4)

  1. Alliage de décolletage contenant : de 20 à 82 % en masse de Ni ;
    un ou plusieurs éléments choisis parmi Ti et Zr dans la plage satisfaisant à la relation 0,05 ≤ X ≤3;
    un ou plusieurs éléments choisis parmi S, Se et Te dans la plage satisfaisant à la relation 0,01 ≤ Y ≤ 0,5X;
    C dans la plage satisfaisant à la relation 0,2 Y ≤ WC ≤ 0,3, la teneur en Ti étant représentée par WTi en % en masse, la teneur en Zr par WZr en % en masse, la teneur en C par WC en % en masse, la teneur en S par WS en % en masse, la teneur en Se par WSe en % en masse et la teneur en Te par WTe en % en masse, les formules suivantes étant mentionnées pour définir X et Y : X ( %  en masse ) = W Ti + 0.52 W Zr ,
    Figure imgb0014
     et Y ( %  en masse ) = W s + 0.41 W se + 0.25 W Te ;
    Figure imgb0015
     et contenant en outre :
    un ou plusieurs éléments choisis parmi Si, Mn et Al dans les plages respectives de 1 % en masse ou moins pour Si ; 1 % en masse ou moins pour Mn ; et 1 % en masse ou moins pour Al; et contenant en outre éventuellement :
    un ou plusieurs éléments choisis parmi Mo et Cu dans les plages respectives de 7 % en masse ou moins pour Mo et de 7 % en masse ou moins pour Cu ;
    12 % en masse ou moins de Cr ;
    18 % en masse ou moins de Co, le reste consistant en Fe et en impuretés inévitables ; et dans lequel :
    un composé de (Ti, Zr) contenant au moins un élément choisi parmi Ti et Zr en tant que composant de type élément de métal, est dispersé dans la phase métallique formant matrice, C étant un élément indispensable comme composant de liaison avec le composant de type élément de métal, et un ou plusieurs éléments choisis parmi S, Se et Te.
  2. Alliage de décolletage selon la revendication 1, dans lequel la teneur en C est ajustée dans la plage de Y/4 à 0,2 % en masse.
  3. Alliage de décolletage selon l'une quelconque des revendications 1 à 2, dans lequel la teneur en C est ajustée dans la plage de Y/4 à Y/2 % en masse.
  4. Alliage de décolletage selon l'une quelconque des revendications 1 à 3, dans lequel la taille particulaire du composé de (Ti, Zr) observé dans la structure d'une section polie de l'alliage, est dans la plage de 0,1 à 30 µm en moyenne, et la proportion de surface du composé dans la structure est en outre dans la plage de 1 à 20 %.
EP04004043A 1999-09-03 2000-09-01 Alliage de décolletage Expired - Lifetime EP1431409B1 (fr)

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
JP25090299 1999-09-03
JP25090299 1999-09-03
JP2000070257 2000-03-14
JP2000070257A JP3425114B2 (ja) 2000-03-14 2000-03-14 Ｐｂフリー型フェライト系快削ステンレス鋼
JP2000221433A JP3425124B2 (ja) 2000-07-21 2000-07-21 フェライト系快削ステンレス鋼
JP2000221433 2000-07-21
JP2000251626 2000-08-22
JP2000251626A JP3425129B2 (ja) 1999-09-03 2000-08-22 快削合金材料
JP2000251602 2000-08-22
JP2000251602A JP3425128B2 (ja) 2000-08-22 2000-08-22 快削合金材料
EP20000118990 EP1085105B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage

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EP00118990.1 Division 2000-09-01
EP20000118990 Division EP1085105B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage

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EP1431409A1 EP1431409A1 (fr) 2004-06-23
EP1431409B1 true EP1431409B1 (fr) 2006-07-05

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EP04004043A Expired - Lifetime EP1431409B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage
EP20000118990 Expired - Lifetime EP1085105B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage
EP04004045A Expired - Lifetime EP1431411B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage
EP04004044A Expired - Lifetime EP1431410B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage
EP04004046A Expired - Lifetime EP1431412B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage

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EP04004045A Expired - Lifetime EP1431411B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage
EP04004044A Expired - Lifetime EP1431410B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage
EP04004046A Expired - Lifetime EP1431412B1 (fr) 1999-09-03 2000-09-01 Alliage de décolletage

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DE (5) DE60029364T2 (fr)

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Publication number Priority date Publication date Assignee Title
JP2003049240A (ja) * 2001-06-01 2003-02-21 Daido Steel Co Ltd 快削鋼
JP2003049241A (ja) * 2001-06-01 2003-02-21 Daido Steel Co Ltd 快削鋼
JP4895434B2 (ja) 2001-06-04 2012-03-14 清仁 石田 快削性Ｎｉ基耐熱合金
EP1378578B1 (fr) * 2002-06-05 2007-11-07 Kiyohito Ishida Alliage de nickel résistant à des températures élevées facilement usinable
RU2485200C1 (ru) * 2012-01-30 2013-06-20 Открытое акционерное общество "Тольяттиазот" Жаропрочный хромоникелевый сплав с аустенитной структурой
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CN110438510B (zh) * 2018-05-02 2021-07-06 温州酷乐餐桌用品有限公司 一种减少不锈钢餐刀中重金属含量处理方法
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EP1085105B1 (fr) 2006-06-28
EP1085105A2 (fr) 2001-03-21
DE60029261D1 (de) 2006-08-17
EP1431410A1 (fr) 2004-06-23
DE60029063D1 (de) 2006-08-10
EP1431411B1 (fr) 2006-07-05
DE60029364T2 (de) 2007-08-09
EP1431411A1 (fr) 2004-06-23
EP1431412B1 (fr) 2006-08-16
EP1431409A1 (fr) 2004-06-23
DE60029260T2 (de) 2007-08-30
DE60029063T2 (de) 2007-06-28
DE60029260D1 (de) 2006-08-17
DE60029364D1 (de) 2006-08-24
DE60029261T2 (de) 2007-02-01
DE60030175D1 (de) 2006-09-28
EP1431412A1 (fr) 2004-06-23
DE60030175T2 (de) 2007-08-30
EP1431410B1 (fr) 2006-07-12
EP1085105A3 (fr) 2001-05-16

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