JPH0762484A - Fe-cr alloy excellent in workability and weather resistance - Google Patents
Fe-cr alloy excellent in workability and weather resistanceInfo
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- JPH0762484A JPH0762484A JP21025693A JP21025693A JPH0762484A JP H0762484 A JPH0762484 A JP H0762484A JP 21025693 A JP21025693 A JP 21025693A JP 21025693 A JP21025693 A JP 21025693A JP H0762484 A JPH0762484 A JP H0762484A
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- workability
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、海浜工業地帯のような
厳しい腐食環境での建築物外装材などに好適な加工性お
よび耐候性に優れたＦｅ−Ｃｒ合金に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Fe-Cr alloy having excellent workability and weather resistance, which is suitable as a building exterior material in a severe corrosive environment such as a beach industrial area.
【０００２】[0002]
【従来の技術】一般にＦｅ−Ｃｒ合金は耐食性に優れた
材料として知られているが、耐食性、加工性および耐酸
化性の改善を含めてＦｅ−Ｃｒ合金の物性の改良が以下
の例示のごとくに各種提案されている。2. Description of the Related Art Generally, an Fe--Cr alloy is known as a material having excellent corrosion resistance. However, improvement of physical properties of an Fe--Cr alloy including improvement of corrosion resistance, workability and oxidation resistance is exemplified as follows. Have been proposed to.
【０００３】特公昭６３−５８９０４号公報では、Ｃｒ
含量１１．０〜１６．０重量％のＦｅ−Ｃｒ合金で、特
にＴｉ含量を特定量とした張り出し性および二次加工性
に優れたフェライト系ステンレス鋼を提案している。In Japanese Patent Publication No. Sho 63-58904, Cr is used.
A Fe-Cr alloy having a content of 11.0 to 16.0% by weight, in particular, a ferritic stainless steel having a Ti content as a specific amount and excellent in overhanging property and secondary workability is proposed.
【０００４】特公昭６４−６２６４号公報では、Ｃｒ含
量８．０〜３５．０重量％のＦｅ−Ｃｒ合金で、特にＳ
ｉ，ＭｎおよびＮｂを各々特定量含有した耐銹性に優れ
たステンレス鋼光輝焼鈍材を提案している。JP-B-64-6264 discloses a Fe-Cr alloy having a Cr content of 8.0 to 35.0% by weight, especially S-containing alloy.
It proposes a stainless steel bright annealed material that contains i, Mn and Nb in specific amounts and has excellent rust resistance.
【０００５】特公平２−１９０２号公報では、Ｃｒ含量
が２０．０重量％を越え２５．０重量％以下のＦｅ−Ｃ
ｒ合金で、特にＭｏ，ＭｎおよびＮｂを特定量含有せし
めた溶接時の耐高温割れ性および溶接部靱性に優れた耐
食性フェライト系ステンレス鋼を提案している。Japanese Patent Publication No. 2-1902 discloses that Fe-C having a Cr content of more than 20.0% by weight and 25.0% by weight or less.
It proposes a corrosion-resistant ferritic stainless steel which is an r alloy, in which Mo, Mn, and Nb are contained in specific amounts and which is excellent in hot cracking resistance during welding and excellent in weld toughness.
【０００６】特開昭６１−１８６４５１号公報では、Ｃ
ｒ含量が２５〜５０重量％のＦｅ−Ｃｒ合金で、特にＳ
ｉ，ＭｎおよびＭｏを特定量含有せしめた耐サワー性に
優れた合金を提案している。In Japanese Patent Laid-Open No. 61-186451, C
Fe-Cr alloys with an r content of 25 to 50% by weight, in particular S
It proposes an alloy containing i, Mn and Mo in specific amounts and having excellent sour resistance.
【０００７】特開昭６２−２６７４５０号公報では、Ｃ
ｒ含量１６〜１９重量％のＦｅ−Ｃｒ合金であって、特
にＭｏを特定量含有せしめた耐粒界腐食性に優れる高純
度フェライト系ステンレス鋼を提案している。In JP-A-62-267450, C
It proposes a high-purity ferritic stainless steel which is an Fe-Cr alloy having an r content of 16 to 19% by weight, and in which a specific amount of Mo is particularly contained and which is excellent in intergranular corrosion resistance.
【０００８】特開平１−２８７２５３号公報では、Ｃｒ
含量１５〜２６重量％、Ａｌ含量４〜６重量％のＦｅ−
Ｃｒ−Ａｌ合金であって、希土類元素を少量特定量含有
せしめた耐酸化性および製造性に優れたＡｌ含有フェラ
イト系ステンレス鋼を提案している。In Japanese Patent Laid-Open No. 1-287253, Cr is used.
Fe-with a content of 15 to 26% by weight and an Al content of 4 to 6% by weight
Proposed is an Al-containing ferritic stainless steel which is a Cr-Al alloy and which contains a small amount of a specified amount of a rare earth element and is excellent in oxidation resistance and manufacturability.
【０００９】特開平２−２３２３４４号公報では、Ｃｒ
含量２５．０〜３０．０重量％のＦｅ−Ｃｒ合金であっ
て、特にＭｏを特定量含有せしめた耐生物付着性および
耐海水性に優れたフェライト系ステンレス鋼を提案して
いる。In Japanese Patent Application Laid-Open No. 2-232344, Cr is used.
A Fe-Cr alloy having a content of 25.0 to 30.0% by weight, in particular, a ferritic stainless steel containing a specific amount of Mo and having excellent biofouling resistance and seawater resistance is proposed.
【００１０】特開平３−２３５５号公報では、Ｃｒ含量
１６．０〜２５．０重量％のＦｅ−Ｃｒ合金であって、
特にＮｂをＣとＮの合計量との比において特定量含有せ
しめた冷間加工性、靱性、耐食性に優れたフェライト系
ステンレス鋼を提案している。特公平５−３６４９２号
公報では、Ｃｒ含量１５〜５０重量％、Ｍｏ５．００重
量％のＦｅ−Ｃｒ合金であって、Ｃ，Ｎ，Ｓ，Ｓｉ，Ｍ
ｎ，Ｏを低減すると同時にＡｌを特定量含有せしめた耐
食性および靱性にすぐれたフェライト系クロムステンレ
ス鋼を提案している。JP-A-3-2355 discloses a Fe-Cr alloy having a Cr content of 16.0 to 25.0% by weight.
In particular, it proposes a ferritic stainless steel containing Nb in a specific amount in the ratio of the total amount of C and N and having excellent cold workability, toughness, and corrosion resistance. Japanese Examined Patent Publication (Kokoku) No. 5-36492 discloses a Fe-Cr alloy having a Cr content of 15 to 50% by weight and a Mo content of 5.00% by weight, which is C, N, S, Si, M.
It proposes a ferritic chrome stainless steel which is excellent in corrosion resistance and toughness, in which n and O are reduced and a specific amount of Al is contained.
【００１１】[0011]
【発明が解決しようとする課題】しかしながら、これら
従来のＦｅ−Ｃｒ合金は海浜工業地帯などの厳しい腐食
環境においては、なお耐候性不足であり、また耐候性と
重視する余りＣｒ，Ｍｏを比較的多量に使用するため、
延性が低下し、十分な加工を施すことが困難であった。However, these conventional Fe-Cr alloys are still insufficient in weather resistance in a severe corrosive environment such as a coastal industrial area, and Cr and Mo, which are important for weather resistance, are relatively insufficient. Because it is used in large quantities,
Ductility decreased, and it was difficult to perform sufficient processing.
【００１２】したがって、本発明の目的は、加工性に優
れ、しかも耐候性に優れたＦｅ−Ｃｒ合金を提供するこ
とにある。Therefore, an object of the present invention is to provide a Fe-Cr alloy which is excellent in workability and weatherability.
【００１３】[0013]
【課題を解決するための手段】本発明者らは上記目的を
達成すべく鋭意研究を行った結果、意外にも従来のＦｅ
−Ｃｒ合金に存在していたＣ，Ｎ，Ｏ，ＰおよびＳなど
の不純物元素がきわめて少ないＦｅ−Ｃｒ合金が著しく
延性において優れることを見いだすとともに、不純物が
極めて少ないＦｅ−Ｃｒ合金にＭｏを特定量添加した合
金は耐候性が著しく向上することを知見し、本発明を完
成するに至った。Means for Solving the Problems As a result of intensive studies to achieve the above object, the present inventors have surprisingly found that conventional Fe
It was found that the Fe-Cr alloy containing extremely few impurity elements such as C, N, O, P and S, which were present in the -Cr alloy, is remarkably excellent in ductility, and Mo is specified in the Fe-Cr alloy containing very few impurities. The inventors have found that the alloys added in a large amount have significantly improved weather resistance, and have completed the present invention.
【００１４】すなわち、本発明は、Ｃｒ含有量が３〜６
０重量％であり、不純物としてのＣ，Ｎ，Ｐ，Ｏおよび
Ｓの合計量が１００重量ｐｐｍ以下であり、かつＭｏを
０．０５重量％以上０．５重量％未満含有し、残部Ｆｅ
および不可避的不純物よりなることを特徴とする加工性
および耐候性に優れたＦｅ−Ｃｒ合金を提供するもので
ある。That is, in the present invention, the Cr content is 3 to 6.
0% by weight, the total amount of C, N, P, O, and S as impurities is 100% by weight or less, and contains Mo in an amount of 0.05% by weight or more and less than 0.5% by weight, and the balance Fe.
And an unavoidable impurity, which provides an Fe-Cr alloy excellent in workability and weather resistance.
【００１５】[0015]
【作用】以下に本発明をさらに詳細に説明する。本発明
のＦｅ−Ｃｒ合金は、Ｃｒ含有量が３〜６０重量％であ
り、Ｃ，Ｎ，Ｏ，ＰおよびＳなどの不純物が１００ｐｐ
ｍ以下と極めて少ないので延性に優れ、またＭｏを０．
０５重量％以上０．５重量％未満含有するので耐候性に
優れる。The present invention will be described in more detail below. The Fe-Cr alloy of the present invention has a Cr content of 3 to 60% by weight and contains 100 pp of impurities such as C, N, O, P and S.
Since it is extremely small as m or less, it has excellent ductility.
Since it is contained in an amount of 05% by weight or more and less than 0.5% by weight, it has excellent weather resistance.
【００１６】次に本発明のＦｅ−Ｃｒ合金の成分の限定
理由について説明する。 〔Ｃｒ〕３〜６０重量％、好ましくは４〜５０重量％を
含有する。上記範囲であれば他の条件と結合して耐候性
に優れた合金となるが、６０重量％を超えての過剰の含
有はコスト高となり好ましくない。Next, the reasons for limiting the components of the Fe-Cr alloy of the present invention will be described. [Cr] 3 to 60% by weight, preferably 4 to 50% by weight. If it is in the above range, it will be combined with other conditions to form an alloy excellent in weather resistance, but an excessive content of more than 60% by weight will increase the cost and is not preferable.
【００１７】〔Ｃ，Ｎ，Ｏ，ＰおよびＳ〕これら元素の
合計量は１００ｐｐｍ以下好ましくは８５ｐｐｍ以下で
ある。これらの元素の含有量を低減することにより合金
の延性、即ち加工性が改善されると同時に上述したＣｒ
含有量の条件およびＭｏ含有量の条件と結合して耐候性
にすぐれた合金となる。この量が１００ｐｐｍを超える
とこのような優れた効果を示さない。その一例を図１に
示す。評価は実施例に示すのと同じである。[C, N, O, P and S] The total amount of these elements is 100 ppm or less, preferably 85 ppm or less. By reducing the contents of these elements, the ductility of the alloy, that is, the workability is improved, and at the same time, the above-mentioned Cr
Combined with the content condition and the Mo content condition, an alloy with excellent weather resistance is obtained. If this amount exceeds 100 ppm, such an excellent effect is not exhibited. One example is shown in FIG. The evaluation is the same as shown in the examples.
【００１８】〔Ｍｏ〕０．０５重量％以上０．５重量％
未満、好ましくは０．１〜０．３重量％を含有する。上
記範囲であれば他の条件と結合して耐候性にすぐれた合
金となる。０．５重量％をこえての過剰のＭｏの含有は
コスト高となり好ましくない。[Mo] 0.05% by weight or more and 0.5% by weight
Less than, preferably 0.1 to 0.3% by weight. Within the above range, the alloy will combine with other conditions to form an alloy with excellent weather resistance. Excessive Mo content of more than 0.5% by weight is not preferable because of high cost.
【００１９】本発明のＦｅ−Ｃｒ合金を製造するには、
原料として、超高純度の電解鉄と電解Ｃｒおよび高純度
金属原料を使用する。これらの原料を１０-5Ｔｏｒｒ以
上の超高真空中で溶解・鋳造することにより本発明のＦ
ｅ−Ｃｒ合金を製造することができる。To produce the Fe--Cr alloy of the present invention,
As the raw material, ultrahigh-purity electrolytic iron, electrolytic Cr, and high-purity metal raw material are used. By melting and casting these raw materials in an ultrahigh vacuum of 10 −5 Torr or more, the F of the present invention can be obtained.
An e-Cr alloy can be manufactured.
【００２０】また本発明のＦｅ−Ｃｒ合金は、熱延焼鈍
板、冷延焼鈍板で用いられても十分に効果が生ずるとと
もに、冷延焼鈍においては、表面仕上げが２Ｄ、２Ｂ、
ＢＡ、ＨＬ、研磨、鏡面などのいずれでもかまわない。Further, the Fe-Cr alloy of the present invention produces a sufficient effect even when used in hot-rolled and cold-rolled annealed sheets, and in cold-rolled annealing, the surface finish is 2D, 2B,
Any of BA, HL, polishing, mirror surface, etc. may be used.
【００２１】[0021]
【実施例】以下に本発明を実施例に基づいて具体的に説
明する。 （実施例）表１に示す組成の合金を超高純度電解鉄と電
解Ｃｒおよび高純度金属Ｍｏを用いて１０-5Ｔｏｒｒ以
上の真空中で要製した。これを約１１５０℃に加熱後、
熱間圧延にて約４．５ｍｍ厚に仕上げ、最終的に０．６
〜１．０ｍｍ厚に冷間圧延後、再結晶と結晶粒径の調整
のための焼鈍を５００〜１１００℃で施した。EXAMPLES The present invention will be specifically described below based on examples. (Example) An alloy having the composition shown in Table 1 was prepared by using ultra-high-purity electrolytic iron, electrolytic Cr, and high-purity metallic Mo in a vacuum of 10 -5 Torr or more. After heating this to about 1150 ° C,
Finished to a thickness of about 4.5 mm by hot rolling and finally 0.6
After cold rolling to a thickness of 1.0 mm, recrystallization and annealing for adjusting the crystal grain size were performed at 500 to 1100 ° C.
【００２２】これから室温での引張試験片（ＪＩＳ５
号）を切り出し、ＪＩＳ Ｚ２２４１に準拠して引張試
験を行った。Tensile test pieces at room temperature (JIS5
No.) was cut out and a tensile test was conducted in accordance with JIS Z2241.
【００２３】また、耐候性試験では、表面＃１０００エ
メリー紙研磨後、千葉市の海浜海岸地区（海から２５
ｍ）にて３か月暴露し、発銹状態を目視観察すると同時
に、発銹状態により下記の５段階評価を行った。その結
果を図２に示す。 ５：発銹なし ４：しみさび発生 ３：しみさび発生大 ２：赤さび発生 １：赤さび発生大 以上の測定結果を表１に合わせて示す。In the weather resistance test, after polishing surface # 1000 emery paper, the seaside coast area of Chiba city (25
m) was exposed for 3 months, and the rusting state was visually observed, and at the same time, the following 5 grades were evaluated according to the rusting state. The result is shown in FIG. 5: No rusting 4: Stain rust generation 3: Stain rust generation large 2: Red rust generation 1: Red rust generation large The above measurement results are also shown in Table 1.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【表２】 [Table 2]
【００２６】[0026]
【発明の効果】本発明のＦｅ−Ｃｒ合金は加工性および
耐候性において優れるので、海浜工業地区など腐食環境
の厳しい地区における建築物外装材などの用途に好適に
用いられる。Since the Fe-Cr alloy of the present invention is excellent in workability and weather resistance, it is suitable for use as a building exterior material in a severe corrosive environment such as a seaside industrial area.
【図１】 （Ｃ＋Ｎ＋Ｏ＋Ｓ＋Ｐ）と引張特性との関係
を示すグラフである。FIG. 1 is a graph showing the relationship between (C + N + O + S + P) and tensile properties.
【図２】 Ｆｅ−（３〜５１％）Ｃｒ合金に関してＭｏ
含有量と発銹ランクの関係と示すグラフである。FIG. 2 Mo for Fe- (3-51%) Cr alloy
It is a graph which shows with the relationship between content and rusting rank.
Claims (1)
物としてのＣ，Ｎ，Ｐ，ＯおよびＳの合計量が１００重
量ｐｐｍ以下であり、かつＭｏを０．０５重量％以上
０．５重量％未満含有し、残部Ｆｅおよび不可避的不純
物よりなることを特徴とする加工性および耐候性に優れ
たＦｅ−Ｃｒ合金。1. A Cr content of 3 to 60% by weight, a total amount of C, N, P, O and S as impurities is 100 ppm by weight or less, and Mo is 0.05% by weight or more and 0 or less. Fe-Cr alloy excellent in workability and weather resistance, characterized by containing less than 0.5% by weight and the balance Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21025693A JP3276472B2 (en) | 1993-08-25 | 1993-08-25 | Fe-Cr alloy with excellent workability and weather resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21025693A JP3276472B2 (en) | 1993-08-25 | 1993-08-25 | Fe-Cr alloy with excellent workability and weather resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0762484A true JPH0762484A (en) | 1995-03-07 |
| JP3276472B2 JP3276472B2 (en) | 2002-04-22 |
Family
ID=16586377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21025693A Expired - Fee Related JP3276472B2 (en) | 1993-08-25 | 1993-08-25 | Fe-Cr alloy with excellent workability and weather resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3276472B2 (en) |
-
1993
- 1993-08-25 JP JP21025693A patent/JP3276472B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3276472B2 (en) | 2002-04-22 |
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