JPH01108316A - Manufacture of fe-cr-al alloy material having superior toughness - Google Patents
Manufacture of fe-cr-al alloy material having superior toughnessInfo
- Publication number
- JPH01108316A JPH01108316A JP26283887A JP26283887A JPH01108316A JP H01108316 A JPH01108316 A JP H01108316A JP 26283887 A JP26283887 A JP 26283887A JP 26283887 A JP26283887 A JP 26283887A JP H01108316 A JPH01108316 A JP H01108316A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- toughness
- less
- alloy material
- hot rolling
- 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.)
- Pending
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229910002060 Fe-Cr-Al alloy Inorganic materials 0.000 title claims abstract description 9
- 238000005098 hot rolling Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 abstract description 14
- 239000000463 material Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000009863 impact test Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000549 Am alloy Inorganic materials 0.000 description 1
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、Ｆｅ−Ｃｒ−Ａｌ系合金の熱間圧延時の仕上
げ板厚を２．５ａｍ以下とした靭性向上に係わる製造方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a manufacturing method for improving the toughness of a Fe-Cr-Al alloy with a finished plate thickness of 2.5 am or less during hot rolling.
従来、 Ｆｅ−Ｃｒ−Ａｌ１系合金は電熱材、熱雷対保
護管、高温炉部品、空気加熱器および燃焼排気系部品な
どのように高温において使用する材料として知られてい
る。特に１重量％で２７％以下のＣｒ、７％以下のＡ１
１、残部がＦｅからなる合金がＪＩＳ規格に規定されて
おり、−船釣な合金である。これらは電気抵抗が高く、
耐高温酸化性が優れているなどの特性を有している。し
かしながらＦｅ−Ｃｒ−ＡＭ系合金は素材の靭性が低く
、加工が困難という製造上の問題がある。Conventionally, Fe-Cr-Al1 alloys have been known as materials used at high temperatures, such as electrical heating materials, thermal lightning protection tubes, high-temperature furnace parts, air heaters, and combustion exhaust system parts. In particular, 1% by weight of 27% or less Cr, 7% or less A1
1. An alloy in which the remainder is Fe is specified in the JIS standard, and is an alloy suitable for boat fishing. These have high electrical resistance;
It has properties such as excellent high-temperature oxidation resistance. However, the Fe-Cr-AM alloy has a manufacturing problem in that the material has low toughness and is difficult to process.
本発明は製造上重大な問題である熱間圧延コイルの靭性
を向上させることにより製造性を改善したＦｅ−Ｃｒ−
Ａｌ系合金の提供を目的とする。The present invention is an Fe-Cr-
The purpose is to provide Al-based alloys.
ｃ問題解決にかかわる知見〕
本発明者らはＦｓ−Ｃｒ−Ａｆｌ系合金において６熱間
圧延コイルの靭性に及ぼす板厚の影響を調査した結果、
板厚を薄くすることが材料の靭性を著しく改善すること
を見出し、本発明に到達した。(c) Knowledge related to problem solving] The present inventors investigated the influence of plate thickness on the toughness of 6 hot rolled coils in Fs-Cr-Afl alloys, and found that
We have discovered that reducing the plate thickness significantly improves the toughness of the material, and have arrived at the present invention.
本発明は重量％でＣ： ０．０３％以下、Ｃｒ：１６．
０〜２６．０％、Ａｆｌ ： ２．０〜６．０％、残部
Ｆｅ及び不可避的不純物からなるＦｅ−Ｃｒ−Ａｎ系合
金を仕上げ板厚を２．５１１１■以下として熱間圧延し
、熱間圧延後急冷することを特徴とする靭性に優れたＦ
ｅ−Ｃｒ−Ａｇ系合金材料の製造方法を提供する。In the present invention, C: 0.03% or less, Cr: 16.
A Fe-Cr-An alloy consisting of 0 to 26.0%, Afl: 2.0 to 6.0%, the remainder Fe and unavoidable impurities was hot rolled to a finished plate thickness of 2.5111 mm or less, and F with excellent toughness characterized by rapid cooling after rolling
A method for producing an e-Cr-Ag alloy material is provided.
本発明はまた、重量％でＣ： ０．０３％以下、１６．
０〜２６．０％、Ａｌ ： ２．０〜６．０％、Ｔｘ、
Ｎｂ、 Ｚｒ、のいずれか一種を０．３％以下、残部
Ｆｅおよび不可避的不純物からなるＦｅ−Ｃｒ−Ａ ｎ
系合金を仕上げ板厚を２．５ｍｍ以下として熱間圧延し
、熱間圧延後急冷することを特徴とする靭性に優れたＦ
ｅ−Ｃｒ−Ａｇ系合金材料の製造方法を提供する。The present invention also provides C: 0.03% or less in weight percent, 16.
0-26.0%, Al: 2.0-6.0%, Tx,
Fe-Cr-A n consisting of 0.3% or less of either Nb or Zr, and the balance Fe and inevitable impurities.
F with excellent toughness, which is characterized by hot rolling a series alloy to a finished plate thickness of 2.5 mm or less and rapidly cooling it after hot rolling.
A method for producing an e-Cr-Ag alloy material is provided.
本発明方法において、急冷とは常温水中に浸漬して冷却
することを意味する。In the method of the present invention, quenching means cooling by immersing in water at room temperature.
本発明方法の素材合金の組成限定理由は次の通りである
。The reasons for limiting the composition of the raw material alloy in the method of the present invention are as follows.
Ｃｒはフェライト系ステンレス鋼の主要元素であり、耐
食性、耐熱性および耐酸化性を満足するには１６％以上
を必要とする。またＣｒ含有量が多い程電気抵抗や耐高
温酸化性は向上するが、逆に加工性は劣化するため上限
を２６％とした。Cr is a major element in ferritic stainless steel, and 16% or more is required to satisfy corrosion resistance, heat resistance, and oxidation resistance. Further, as the Cr content increases, the electrical resistance and high temperature oxidation resistance improve, but the workability deteriorates, so the upper limit was set at 26%.
Ａｌは電気抵抗や耐高温酸化性を向上させるには不可欠
な元素であり、この両者の性能を得るためには２．０％
以上を必要とする。またその添加量が多い程前述の性能
は向上するがそれに伴ない加工性は劣化するので６．０
％を上限とした。Al is an essential element for improving electrical resistance and high-temperature oxidation resistance, and in order to obtain both of these properties, 2.0%
or more is required. In addition, the higher the amount added, the better the above-mentioned performance will be, but the processability will deteriorate accordingly, so 6.0
The upper limit was %.
Ｃは靭性、耐食性向上のために可及的に低いことが望ま
しいが、極端に低下させることは製造コスト上昇を招く
ため１通常の精錬技術で低減可能な０．０３％以下とす
る。It is desirable that C be as low as possible in order to improve toughness and corrosion resistance, but reducing it too much will increase manufacturing costs, so it is set to 0.03% or less, which can be reduced by ordinary refining techniques.
本発明のＦｅ−Ｃｒ−ＡΩ系合金は本来耐高温酸化性を
要求される用途に使用されるものであるが、Ｔｉ、Ｎｂ
、 Ｚｒは耐高温酸化性の向上に有利な元素であり、こ
の目的のためには０．３％までの含有量で添加される。The Fe-Cr-AΩ alloy of the present invention is originally used for applications requiring high-temperature oxidation resistance, but Ti, Nb
, Zr is an element advantageous for improving high-temperature oxidation resistance, and is added in a content of up to 0.3% for this purpose.
し
本発明方法の素材合金は不純物ｔそ、脱酸剤として添加
され残留する１、５％までのＳＬ、 １．０％までのＭ
ｎ、に料から混入して来る０、０２％までのＰ。However, the raw material alloy of the method of the present invention contains impurities, SL of up to 1.5%, and M of up to 1.0%, which are added as deoxidizing agents and remain.
n, up to 0.02% of P is mixed in from the feedstock.
０．０１％までのＳを含むことができる。It can contain up to 0.01% S.
本合金の熱間圧延後のコイルには常温で衝撃や加工を受
けると破断を生じてしまうという製造上の大きな問題が
ある。これは靭性が乏しいために生じる現象であり、圧
延後のコ・イルの冷却途中に生じる４７５℃脆性や粗大
粒などに起因しているものど考えられる。そこで本発明
においてはコイル急冷による４７５℃脆化防止と熱間圧
延組織の微細化による熱間圧延コイルの靭性向上を目的
として熱間圧延時の仕上げ板厚を薄くするとともに熱間
圧延後水冷を行い、常温においても靭性の高い熱間圧延
コイルを製造した。またここで靭性向上に有効な熱間圧
延時の仕上げ板厚は２．５ｍ＋ｓ以下である。There is a major manufacturing problem in that hot-rolled coils of this alloy will break if subjected to impact or processing at room temperature. This is a phenomenon caused by poor toughness, and is thought to be caused by 475°C brittleness or coarse grains that occur during cooling of the coil after rolling. Therefore, in the present invention, in order to prevent 475°C embrittlement by rapid cooling of the coil and to improve the toughness of the hot rolled coil by refining the hot rolled structure, the finished plate thickness during hot rolling is reduced, and water cooling is performed after hot rolling. A hot-rolled coil with high toughness even at room temperature was produced. Further, the finished plate thickness during hot rolling, which is effective for improving toughness, is 2.5 m+s or less.
第１表に示す組成のＦｅ−Ｃｒ−Ａｌ系合金を高周波真
空溶解炉にて溶製した後、厚さ５．５ｍｍ、 ３．３ｍ
ｍおよびに２．３１まで熱間圧延を行った。徐冷および
急冷した試料についてシャルピー１＃撃試験を行い。After melting the Fe-Cr-Al alloy having the composition shown in Table 1 in a high-frequency vacuum melting furnace, it was melted to a thickness of 5.5 mm and 3.3 m.
Hot rolling was carried out to m and 2.31. A Charpy 1# impact test was performed on the slowly cooled and rapidly cooled samples.
靭性の評価をした。シャルピー１＃撃試験はＪＩＳＺ２
２０２の４号サブサイズ試験片を用いてＪＩＳ Ｚ２２
４２に従って実施した。Toughness was evaluated. Charpy 1 # impact test is JISZ2
JIS Z22 using No. 4 sub-size test piece of 202
It was carried out according to 42.
第２表および第１図は本発明の成果を表わすシャルピー
衝撃試験結果である。徐冷材では４７５℃脆化の影響に
より各板厚とも衝撃値は低い。しかし急冷材では板厚を
５．Ｏｎ＋ａか９３．３ｍｍ、２．３ｍｍへと薄くする
ことにより衝撃値は２倍以上に、絶対値的に見ても板厚
２．３■では２．０ｋｇｍ／ａＪ以上になり、冷間圧延
が可能となった。Table 2 and FIG. 1 are Charpy impact test results showing the results of the present invention. In slow cooling materials, the impact value is low for each plate thickness due to the effect of 475°C embrittlement. However, for rapidly cooled materials, the plate thickness should be set to 5. On+a is 93.3mm, and by thinning it to 2.3mm, the impact value more than doubles, and in terms of absolute value, it is more than 2.0kgm/aJ with a plate thickness of 2.3mm, and cold rolling is It has become possible.
以上説明したように１本発明により従来熱間圧延後のコ
イルの靭性が低いため、製造が困難であったＦｅ−Ｃｒ
−Ａｆｉ系合金材料の靭性が著しく向上し。As explained above, the present invention enables Fe-Cr, which has been difficult to manufacture due to the low toughness of the coil after hot rolling, to be
- The toughness of Afi alloy materials is significantly improved.
その製造が可能となった。Its production has become possible.
第２表 衝撃試験結果 （）は徐冷時の１ｉｌｒｌｌ値Table 2 Impact test results () is the 1ilrll value during slow cooling
第１図は合金の衝撃値に及ぼす板厚の影響を示す。 特許出原人 日新製鋼株式会社 Figure 1 shows the effect of plate thickness on the impact value of the alloy. Patent originator: Nisshin Steel Co., Ltd.
Claims (1)
６．０％、Ａｌ：２．０〜６．０％、残部Ｆｅ及び不可
避的不純物からなるＦｅ−Ｃｒ−Ａｌ系合金を仕上げ板
厚を２．５ｍｍ以下として熱間圧延し、熱間圧延後急冷
することを特徴とする靭性に優れたＦｅ−Ｃｒ−Ａｌ系
合金材料の製造方法。 ２、重量％でＣ：０．０３％以下、Ｃｒ：１６．０〜２
６．０％、Ａｌ：２．０〜６．０％、Ｔｉ、Ｎｂ、Ｚｒ
のいずれか一種を０． ３％以下、残部Ｆｅ及び不可避的不純物からなるＦｅ−
Ｃｒ−Ａｌ系合金を仕上げ板厚を２．５ｍｍ以下として
熱間圧延し、熱間圧延後急冷することを特徴とする靭性
に優れたＦｅ−Ｃｒ−Ａｌ系合金材料の製造方法。[Claims] 1. C: 0.03% or less in weight%, Cr: 16.0 to 2
A Fe-Cr-Al alloy consisting of 6.0% Al, 2.0 to 6.0% Al, and the balance Fe and unavoidable impurities was hot rolled to a finished plate thickness of 2.5 mm or less, and after hot rolling. A method for producing a Fe-Cr-Al alloy material having excellent toughness, which comprises rapid cooling. 2.C by weight%: 0.03% or less, Cr: 16.0-2
6.0%, Al: 2.0-6.0%, Ti, Nb, Zr
0. Fe- 3% or less, the balance consisting of Fe and unavoidable impurities
A method for producing a Fe-Cr-Al alloy material having excellent toughness, which comprises hot rolling a Cr-Al alloy to a finished plate thickness of 2.5 mm or less, and rapidly cooling after hot rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26283887A JPH01108316A (en) | 1987-10-20 | 1987-10-20 | Manufacture of fe-cr-al alloy material having superior toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26283887A JPH01108316A (en) | 1987-10-20 | 1987-10-20 | Manufacture of fe-cr-al alloy material having superior toughness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01108316A true JPH01108316A (en) | 1989-04-25 |
Family
ID=17381321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26283887A Pending JPH01108316A (en) | 1987-10-20 | 1987-10-20 | Manufacture of fe-cr-al alloy material having superior toughness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01108316A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831174A (en) * | 2015-05-08 | 2015-08-12 | 上海蓝铸特种合金材料有限公司 | High-temperature oxidation resistant metal material and preparation method thereof |
| CN113265591A (en) * | 2021-05-18 | 2021-08-17 | 季华实验室 | Fe-Cr-Al alloy steel plate and preparation method thereof |
-
1987
- 1987-10-20 JP JP26283887A patent/JPH01108316A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831174A (en) * | 2015-05-08 | 2015-08-12 | 上海蓝铸特种合金材料有限公司 | High-temperature oxidation resistant metal material and preparation method thereof |
| CN113265591A (en) * | 2021-05-18 | 2021-08-17 | 季华实验室 | Fe-Cr-Al alloy steel plate and preparation method thereof |
| CN113265591B (en) * | 2021-05-18 | 2022-05-27 | 季华实验室 | Fe-Cr-Al alloy steel plate and preparation method thereof |
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