JP6872786B2 - Low thermal expansion cast steel and forged steel with low anisotropy and little aging - Google Patents
Low thermal expansion cast steel and forged steel with low anisotropy and little aging Download PDFInfo
- Publication number
- JP6872786B2 JP6872786B2 JP2017074650A JP2017074650A JP6872786B2 JP 6872786 B2 JP6872786 B2 JP 6872786B2 JP 2017074650 A JP2017074650 A JP 2017074650A JP 2017074650 A JP2017074650 A JP 2017074650A JP 6872786 B2 JP6872786 B2 JP 6872786B2
- Authority
- JP
- Japan
- Prior art keywords
- thermal expansion
- less
- steel
- low thermal
- forged
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 24
- 239000010959 steel Substances 0.000 title claims description 24
- 229910001208 Crucible steel Inorganic materials 0.000 title claims description 21
- 230000032683 aging Effects 0.000 title claims description 11
- 239000012535 impurity Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 description 21
- 229910045601 alloy Inorganic materials 0.000 description 13
- 239000000956 alloy Substances 0.000 description 13
- 239000000243 solution Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 230000035882 stress Effects 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Description
本発明は低熱膨張合金鋳鋼及び鍛鋼品に関し、特に、経年変化の小さい低熱膨張鋳鋼及び鍛鋼品に関する。 The present invention relates to low thermal expansion alloy cast steel and forged steel products, and particularly to low thermal expansion cast steel and forged steel products having little aging.
エレクトロニクスや半導体関連機器、レーザ加工機、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が広く使用されている。 Thermally stable Invar alloys are widely used as component materials for electronics, semiconductor-related equipment, laser processing machines, and ultra-precision processing equipment.
一方、精密機器の構成部品に使用される低熱膨張合金においても、長期間にわたる経時寸法変化の問題が指摘されている。 On the other hand, it has been pointed out that low thermal expansion alloys used for components of precision equipment also have a problem of dimensional change over a long period of time.
特許文献１では、高Ｎｉ含有の低熱膨張鋳鉄合金は、一般の鋳鉄に比較して熱伝導率が小さいために、鋳鉄材を水やオイルの中に焼き入れるなどにより急速冷却した場合、鋳鉄材内部は表層部と比較して十分な冷却速度を確保することが困難であり、その結果、鋳鉄材の表層部と内部との冷却速度の違いによって弾塑性変形能の時間的なずれが発生し、大きな残留応力が発生し、さらに、この残留応力は機械加工や時間の経過とともに解放されるため、長期間にわたり使用する鋳造製品の経時寸法変化の原因となることが指摘されている。 According to Patent Document 1, a low thermal expansion cast iron alloy containing high Ni has a lower thermal conductivity than general cast iron. Therefore, when the cast iron material is rapidly cooled by baking it in water or oil, the cast iron material is used. It is difficult to secure a sufficient cooling rate inside the surface layer compared to the surface layer, and as a result, a time lag in elasto-plastic deformability occurs due to the difference in cooling rate between the surface layer and the inside of the cast iron material. It has been pointed out that a large residual stress is generated, and that this residual stress is released with the passage of machining and time, which causes a dimensional change over time in a cast product used for a long period of time.
特許文献２には、炭化物を形成していない炭素量を０．０１０重量％以下とし、低熱膨張率を維持しつつ、経時変形を限りなく抑えられる合金が開示されている。 Patent Document 2 discloses an alloy in which the amount of carbon that does not form carbide is 0.010% by weight or less, the coefficient of thermal expansion is maintained low, and the deformation over time can be suppressed as much as possible.
前記特許文献に開示されている経年変化は、近年の要求に対しては、まだ十分とはいえない。 The secular change disclosed in the patent document is not yet sufficient for recent demands.
本発明は、経年変化がさらに小さい低熱膨張鋳鋼及び鍛鋼品を提供することを課題とする。 An object of the present invention is to provide a low thermal expansion cast steel and a forged steel product having a smaller change with time.
本発明者らは、経年変化の小さい低熱膨張合金を得る方法を鋭意検討した。その結果、γ膨張の原因と考えられるＣに加えて、Ｂ、Ｎの含有量を適切な範囲に設定することにより、経年変化が±０．５ｐｐｍ／年以内の低熱膨張鋳鋼及び鍛鋼品が得られることを知見した。 The present inventors have diligently studied a method for obtaining a low thermal expansion alloy having a small change over time. As a result, by setting the contents of B and N in an appropriate range in addition to C, which is considered to be the cause of γ expansion, low thermal expansion cast steel and forged steel products with aging within ± 0.5 ppm / year can be obtained. It was found that it can be done.
本発明は上記の知見に基づきなされたものであって、その要旨は以下のとおりである。 The present invention has been made based on the above findings, and the gist thereof is as follows.
質量％で、Ｃ：０．０２０％以下、Ｓｉ：０．３０％以下、Ｍｎ：０．５０％以下、Ｐ：０．０２％以下、Ｓ：０．０２％以下、Ｎｉ：３０〜３６％、Ｃｏ：２〜７％、Ｎ：０．０２０％以下、及びＢ：０〜０．００２％を含有し、残部がＦｅ及び不可避的不純物であり、Ｃ、Ｂ、Ｎの含有量（質量％）［Ｃ］、［Ｂ］、［Ｎ］が７．４［Ｃ］＋１５．６［Ｂ］＋［Ｎ］≦０．１５を満たすことを特徴とする経年変化の少ない低熱膨張鋳鋼及び鍛鋼品。 By mass%, C: 0.020% or less, Si: 0.30% or less, Mn: 0.50% or less, P: 0.02% or less, S: 0.02% or less, Ni: 30 to 36% , Co: 2-7%, N: 0.020% or less, and B: 0 to 0.002%, the balance is Fe and unavoidable impurities, and the content of C, B, N (mass%). ) Low thermal expansion cast steel and forged steel products with little aging, characterized in that [C], [B], and [N] satisfy 7.4 [C] + 15.6 [B] + [N] ≤ 0.15. ..
本発明によれば、経年変化の小さい低熱膨張鋳鋼及び鍛鋼品を得られるので、長期間にわたるわずかな寸法変化が問題となるような精密機器の構成部品等に適用できる。 According to the present invention, since low thermal expansion cast steel and forged steel products with small aging change can be obtained, they can be applied to components and the like of precision equipment in which slight dimensional changes over a long period of time are a problem.
以下、本発明について詳細に説明する。以下、成分組成に関する「％」は特に断りのない限り「質量％」を表すものとする。はじめに、本発明の鋳鋼及び鍛鋼品の成分組成について説明する。 Hereinafter, the present invention will be described in detail. Hereinafter, "%" regarding the component composition shall represent "mass%" unless otherwise specified. First, the composition of the cast steel and the forged steel product of the present invention will be described.
Ｃは、オーステナイトに固溶し強度の上昇に寄与する。Ｃの含有量が多くなると、熱膨張係数が大きくなる。さらに、延性が低下して、鋳造割れが生じやすくなるので、含有量は０．０２０％以下、好ましくは０．０１０％以下とする。本発明の低熱膨張鋳鋼及び鍛鋼品においては、Ｃは必須の元素ではなく、含有量は０でもよい。 C dissolves in austenite and contributes to an increase in strength. As the C content increases, the coefficient of thermal expansion increases. Further, the ductility is lowered and casting cracks are likely to occur. Therefore, the content is set to 0.020% or less, preferably 0.010% or less. In the low thermal expansion cast steel and forged steel products of the present invention, C is not an essential element and the content may be 0.
Ｓｉは、脱酸材として添加される。Ｓｉ量が０．３０％を超えると熱膨張係数が増加するので、Ｓｉ量は０．３０％以下、好ましくは０．１０％以下とする。溶湯の流動性を向上させるためには、Ｓｉは０．０５％以上含有させることが好ましい。Ｓｉは必須の元素ではなく、含有量は０でもよい。 Si is added as a deoxidizing material. Since the coefficient of thermal expansion increases when the amount of Si exceeds 0.30%, the amount of Si is set to 0.30% or less, preferably 0.10% or less. In order to improve the fluidity of the molten metal, it is preferable to contain Si in an amount of 0.05% or more. Si is not an essential element and its content may be zero.
Ｍｎは、脱酸材として添加される。また、固溶強化による強度向上にも寄与する。この効果を得るためには、Ｍｎ量を０．１％以上が好ましい。Ｍｎの含有量が０．５０％を超えても効果が飽和し、コスト高となるので、Ｍｎ量は０．５０％以下、好ましくは０．３０％以下とする。Ｍｎは必須の元素ではなく、含有量は０でもよい。 Mn is added as a deoxidizing material. It also contributes to the improvement of strength by strengthening the solid solution. In order to obtain this effect, the amount of Mn is preferably 0.1% or more. Even if the Mn content exceeds 0.50%, the effect is saturated and the cost is high. Therefore, the Mn content is set to 0.50% or less, preferably 0.30% or less. Mn is not an essential element and its content may be zero.
Ｐは不純物として含有される。Ｐが多量に含有されると、熱間加工性が劣化し、さらに鋳造割れが生じやすくなるので、Ｐの含有量は０．０２％以下に制限する必要がある。 P is contained as an impurity. If a large amount of P is contained, the hot workability is deteriorated and casting cracks are likely to occur. Therefore, it is necessary to limit the P content to 0.02% or less.
Ｓは不純物として含有される。Ｓが多量に含有されると、熱間加工性が劣化し、さらに鋳造割れが生じやすくなるので、Ｓの含有量は０．０２％以下に制限する必要がある。 S is contained as an impurity. If a large amount of S is contained, the hot workability is deteriorated and casting cracks are likely to occur. Therefore, it is necessary to limit the S content to 0.02% or less.
Ｎｉは、熱膨張係数を低下させる、必須の元素である。Ｎｉ量は多すぎても少なすぎても熱膨張係数が十分に小さくならない。熱膨張係数を十分に小さくするために、Ｎｉ量は３０〜３６％、好ましくは３０〜３４％の範囲とする。 Ni is an essential element that lowers the coefficient of thermal expansion. If the amount of Ni is too large or too small, the coefficient of thermal expansion will not be sufficiently small. In order to sufficiently reduce the coefficient of thermal expansion, the amount of Ni is set in the range of 30 to 36%, preferably 30 to 34%.
Ｃｏは、Ｎｉとの組み合わせにより熱膨張係数の低下に寄与する。所望の熱膨張係数を得るため、Ｃｏの範囲は２〜７％、好ましくは４〜６％とする。 Co contributes to a decrease in the coefficient of thermal expansion in combination with Ni. In order to obtain the desired coefficient of thermal expansion, the range of Co is 2 to 7%, preferably 4 to 6%.
Ｎは不純物として含有される。Ｎが多量に含有されると、内部欠陥を引き起こす原因となるので、Ｎの含有量は０．０２０％以下に制限する必要がある。 N is contained as an impurity. If a large amount of N is contained, it causes internal defects. Therefore, it is necessary to limit the content of N to 0.020% or less.
Ｂは、固溶Ｂとして粒界に偏析させることにより、熱間加工性を向上させ、さらに鋳造割れを防ぐ効果がある。ただし、Ｂは、低熱膨張鋳鋼及び鍛鋼品の微小な経年変化を大きくする。 B has the effect of improving hot workability and further preventing casting cracks by segregating B as a solid solution B at the grain boundaries. However, B increases minute aging of low thermal expansion cast steel and forged steel products.
図１に、Ｂの添加の有無による経年変化を測定した結果を示す。（ａ）、（ｂ）は、それぞれ、表１に示す化学成分を有する低熱膨張鋳鋼及び鍛鋼品の経年変化を示している。Ｂを添加した合金（ａ）では２４か月で２５０ｎｍ／ｍ以上の経年変化があるが、Ｂを添加しない合金（ｂ）では−３ｎｍ／ｍ程度と、Ｂを添加した合金に比べ、経年変化が小さくなった。本発明の低熱膨張鋳鋼及び鍛鋼品では、Ｂ添加の利点とのバランスを考慮し、Ｂの添加量は０〜０．００２％とする。 FIG. 1 shows the results of measuring the secular change with and without the addition of B. (A) and (b) show the secular change of the low thermal expansion cast steel and the forged steel product having the chemical components shown in Table 1, respectively. The alloy (a) with B added has a secular change of 250 nm / m or more in 24 months, but the alloy (b) without B has a secular change of about -3 nm / m as compared with the alloy with B added. Has become smaller. In the low thermal expansion cast steel and forged steel products of the present invention, the amount of B added is 0 to 0.002% in consideration of the balance with the advantage of adding B.
成分組成の残部は、Ｆｅ及び不可避的不純物である。不可避的不純物とは、本発明で規定する成分組成を有する鋼を工業的に製造する際に、原料や製造環境等から不可避的に混入するものをいう。 The rest of the composition is Fe and unavoidable impurities. The unavoidable impurities refer to those that are unavoidably mixed from the raw materials, the manufacturing environment, etc. when the steel having the component composition specified in the present invention is industrially manufactured.
本発明の低熱膨張鋳鋼及び鍛鋼品は、さらに、Ｃ、Ｂ、Ｎの含有量（質量％）［Ｃ］、［Ｂ］、［Ｎ］が、７．４［Ｃ］＋１５．６［Ｂ］＋［Ｎ］≦０．１５を満たすことが必要である。 The low thermal expansion cast steel and forged steel products of the present invention further have a C, B, N content (mass%) [C], [B], [N] of 7.4 [C] + 15.6 [B]. It is necessary to satisfy + [N] ≦ 0.15.
７．４［Ｃ］＋１５．６［Ｂ］＋［Ｎ］はＮ当量であり、経年変化に影響を与え、Ｎ当量が大きくなると、経年変化が大きくなる。２年間の経年変化を±０．５ｐｐｍ／年以内とするためには、Ｎ当量を０．１５以下とする必要がある。 7.4 [C] + 15.6 [B] + [N] are N equivalents, which affect the secular change, and the larger the N equivalent, the larger the secular change. In order to keep the secular change for 2 years within ± 0.5 ppm / year, it is necessary to set the N equivalent to 0.15 or less.
以上の化学成分を有する鋳鋼及び鍛鋼品を製造することにより、経年変化の小さい低熱膨張鋳鋼品及び鍛鋼品を得ることができる。本発明の低熱膨張鋳鋼品の製造に用いる鋳型や、鋳型への溶鋼の注入装置、注入方法は特に限定されるものではなく、公知の装置、方法を用いればよい。製造された鋳造合金を直接切削加工等で加工し、あるいは鍛造後加工し、鋳造及び鍛鋼鋼部品を得ることができる。 By producing cast steel and forged steel products having the above chemical components, low thermal expansion cast steel products and forged steel products with small aging can be obtained. The mold used for producing the low thermal expansion cast steel product of the present invention, the apparatus for injecting molten steel into the mold, and the injection method are not particularly limited, and known apparatus and methods may be used. The manufactured cast alloy can be directly processed by cutting or the like, or can be processed after forging to obtain cast and forged steel parts.
さらに、熱膨張係数をより低くして、経年変化を小さくするためには、溶体化処理を施すことが好ましい。溶体化処理は鋳造、あるいは鍛造後に施す。溶体化処理は、合金を好ましくは６００〜１０００℃に、より好ましくは６５０〜８５０℃に加熱して０．５〜５ｈｒ保持した後急冷する。冷却速度は１０℃／ｍｉｎ以上が好ましく、１００℃／ｍｉｎ以上がより好ましい。溶体化処理により、組織は十分に再結晶し、また、鋳造時に析出した析出物が固溶して、延性、靭性が向上する。さらに、残留応力と組織の異方性が小さくなり、経年変化量が小さくなる。溶体化温度が６００℃より低いと鍛造品は残留応力と組織の異方性が残り、経年変化量に影響する。 Further, in order to lower the coefficient of thermal expansion and reduce the secular change, it is preferable to carry out a solution treatment. The solution treatment is performed after casting or forging. In the solution treatment, the alloy is heated to preferably 600 to 1000 ° C., more preferably 650 to 850 ° C., held for 0.5 to 5 hr, and then rapidly cooled. The cooling rate is preferably 10 ° C./min or higher, more preferably 100 ° C./min or higher. By the solution treatment, the structure is sufficiently recrystallized, and the precipitates precipitated during casting are solid-solved to improve the ductility and toughness. Further, the residual stress and the anisotropy of the structure are reduced, and the amount of aging is reduced. If the solution temperature is lower than 600 ° C., residual stress and anisotropy of the structure remain in the forged product, which affects the amount of aging.
溶体化処理の後に、必要に応じて、３００〜３５０℃で１〜５ｈｒ保持し、その後空冷する応力除去焼きなまし等の公知の熱処理を施してもよい。 After the solution treatment, if necessary, a known heat treatment such as stress relief annealing, which is held at 300 to 350 ° C. for 1 to 5 hours and then air-cooled, may be performed.
表２に示す成分組成となるように調整した溶湯を鋳型に注湯し鋳鋼及び鍛鋼品を製造したまた、鍛鋼品は鋳塊に鍛錬比４の鍛造を施した。得られた鋳鋼及び鍛鋼品には８００℃で４ｈｒ保持した後水冷する溶体化処理及び３２０℃で４ｈｒ保持の応力除去焼きなまし処理を行った。表２中の「Ｎ当量」は、７．４［Ｃ］＋１５．６［Ｂ］＋［Ｎ］の値を示す。［Ｃ］、［Ｂ］、［Ｎ］は、それぞれ、Ｃ、Ｂ、Ｎの含有量（質量％）である。 The molten metal adjusted to have the composition shown in Table 2 was poured into a mold to produce cast steel and forged steel products, and the ingot was forged with a forging ratio of 4. The obtained cast steel and forged steel products were subjected to a solution treatment in which they were held at 800 ° C. for 4 hours and then water-cooled, and a stress relief annealing treatment in which they were held at 320 ° C. for 4 hours. “N equivalent” in Table 2 indicates a value of 7.4 [C] + 15.6 [B] + [N]. [C], [B], and [N] are the contents (mass%) of C, B, and N, respectively.
また、表２の熱膨張係数（ｐｐｍ／℃）はφ６×２５Ｌの試験片を加工して、熱膨張測定装置により、０℃から６０℃の平均値を求めた。 Further, the coefficient of thermal expansion (ppm / ° C.) in Table 2 was obtained by processing a test piece having a diameter of 6 × 25 L and using a thermal expansion measuring device to obtain an average value of 0 ° C. to 60 ° C.
得られた各鋼について、９ｍｍ×３５ｍｍ×２００ｍｍの直方体の試料を作製し、９×３５端面間の長さを測定することで２４か月の経年変化を調査した。試料の長さ方向の平行度は０．０１、９×２００面と２００×３５面の直角度は０．１であった。測定面平面度交差はＪＩＳ Ｂ７５０６のＫ級とした。 For each of the obtained steels, a rectangular parallelepiped sample of 9 mm × 35 mm × 200 mm was prepared, and the secular change for 24 months was investigated by measuring the length between the 9 × 35 end faces. The parallelism in the length direction of the sample was 0.01, and the squareness of the 9 × 200 plane and the 200 × 35 plane was 0.1. The plane flatness intersection of the measurement surface was set to K class of JIS B7506.
試料は室温の恒温槽で保管し、測定時には、試料をレーザ干渉計に取り付け、温度をならし、２４時間後に測定を行った。測定時期は試験開始から、０、２、４、６、１２、１８、２４か月とした。２４か月後の結果を表３に示す。 The sample was stored in a constant temperature bath at room temperature, and at the time of measurement, the sample was attached to a laser interferometer, the temperature was leveled, and the measurement was performed 24 hours later. The measurement time was 0, 2, 4, 6, 12, 18, and 24 months from the start of the test. The results after 24 months are shown in Table 3.
本発明の低熱膨張鋳鋼及び鍛鋼品は、経年変化が小さく、２４か月の経年変化が±０．５ｐｐｍ／年以内であった。これに対して比較例では、２４か月の経年変化が±０．５ｐｐｍ／年以内の範囲に収まらず、大きくなった。 The low thermal expansion cast steel and forged steel products of the present invention had a small secular change, and the secular change for 24 months was within ± 0.5 ppm / year. On the other hand, in the comparative example, the secular change for 24 months did not fall within the range of ± 0.5 ppm / year and became large.
Claims (2)
Ｃ ：０．０２０％以下、
Ｓｉ：０．３０％以下、
Ｍｎ：０．５０％以下、
Ｐ ：０．０２％以下、
Ｓ ：０．０２％以下、
Ｎｉ：３０〜３６％、
Ｃｏ：２〜７％、
Ｎ ：０．０２０％以下、及び
Ｂ ：０．０００５〜０．００２％
を含有し、残部がＦｅ及び不可避的不純物であり、
Ｃ、Ｂ、Ｎの含有量（質量％）［Ｃ］、［Ｂ］、［Ｎ］が
７．４［Ｃ］＋１５．６［Ｂ］＋［Ｎ］≦０．１５
を満たすことを特徴とする異方性が小さく経年変化の少ない低熱膨張鋳鋼及び鍛鋼品。 By mass%
C: 0.020% or less,
Si: 0.30% or less,
Mn: 0.50% or less,
P: 0.02% or less,
S: 0.02% or less,
Ni: 30-36%,
Co: 2-7%,
N: 0.020% or less, and B: 0.0005 to 0.002%
The balance is Fe and unavoidable impurities.
Content of C, B, N (% by mass) [C], [B], [N] is 7.4 [C] + 15.6 [B] + [N] ≤ 0.15
Low thermal expansion cast steel and forged steel products with low anisotropy and little aging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017074650A JP6872786B2 (en) | 2017-04-04 | 2017-04-04 | Low thermal expansion cast steel and forged steel with low anisotropy and little aging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017074650A JP6872786B2 (en) | 2017-04-04 | 2017-04-04 | Low thermal expansion cast steel and forged steel with low anisotropy and little aging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2018178151A JP2018178151A (en) | 2018-11-15 |
| JP6872786B2 true JP6872786B2 (en) | 2021-05-19 |
Family
ID=64281325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017074650A Active JP6872786B2 (en) | 2017-04-04 | 2017-04-04 | Low thermal expansion cast steel and forged steel with low anisotropy and little aging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6872786B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003253398A (en) * | 2002-02-28 | 2003-09-10 | Jfe Steel Kk | Low thermal-expansion alloy thin-sheet with excellent etching rate and etching precision, and manufacturing method therefor |
| JP2006206949A (en) * | 2005-01-27 | 2006-08-10 | Jfe Steel Kk | METHOD FOR MANUFACTURING Ni ALLOY |
| JP6058045B2 (en) * | 2014-07-02 | 2017-01-11 | 新報国製鉄株式会社 | High rigidity low thermal expansion casting and method for producing the same |
-
2017
- 2017-04-04 JP JP2017074650A patent/JP6872786B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018178151A (en) | 2018-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3143175B1 (en) | Hypereutectic white iron alloys comprising vanadium, chromium, and nitrogen and articles made therefrom | |
| KR102360098B1 (en) | Low thermal expansion cast steel and method for producing the same | |
| JP6628902B2 (en) | Low thermal expansion alloy | |
| JP6656013B2 (en) | Low thermal expansion cast steel product and method of manufacturing the same | |
| JP6188643B2 (en) | Extremely low thermal expansion alloy and manufacturing method thereof | |
| WO2013150972A1 (en) | Fe-Al ALLOY PRODUCTION METHOD | |
| KR20190028492A (en) | High frequency quenching steel | |
| JP2019065344A (en) | Low thermal expansion alloy | |
| JPWO2014157146A1 (en) | Austenitic stainless steel sheet and method for producing high-strength steel using the same | |
| JP6793583B2 (en) | Low thermal expansion alloy | |
| JPWO2019054390A1 (en) | Austenitic stainless steel and manufacturing method thereof | |
| JP2019044254A (en) | Mold | |
| JP5537248B2 (en) | Machine structural steel, manufacturing method thereof, and machined part manufacturing method using machine structural steel | |
| JP2018188690A (en) | Low thermal expansion alloy | |
| JP6872786B2 (en) | Low thermal expansion cast steel and forged steel with low anisotropy and little aging | |
| JP2008308745A (en) | Hot forging mold and manufacturing method therefor | |
| TW201313922A (en) | Electromagnetic stainless steel and manufacturing method thereof | |
| JP6949352B2 (en) | Low thermal expansion alloy | |
| JP6793574B2 (en) | Low thermal expansion alloy | |
| WO2017179652A1 (en) | Titanium alloy and method for producing material for timepiece exterior parts | |
| JP6536317B2 (en) | α + β-type titanium alloy sheet and method of manufacturing the same | |
| TWI701343B (en) | Titanium alloy plate and golf club head | |
| JP6828947B2 (en) | Lightweight steel with excellent corrosion resistance and specific strength and its manufacturing method | |
| WO2015136766A1 (en) | Low thermal expansion casting alloy and method for producing same | |
| JP6692466B2 (en) | Low thermal expansion alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20200130 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20200924 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20201013 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20201209 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20210316 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20210413 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6872786 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |