JPH0778268B2 - High chrome ferrite alloy steel - Google Patents
High chrome ferrite alloy steelInfo
- Publication number
- JPH0778268B2 JPH0778268B2 JP61247379A JP24737986A JPH0778268B2 JP H0778268 B2 JPH0778268 B2 JP H0778268B2 JP 61247379 A JP61247379 A JP 61247379A JP 24737986 A JP24737986 A JP 24737986A JP H0778268 B2 JPH0778268 B2 JP H0778268B2
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- JP
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- Prior art keywords
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- steel
- temperature strength
- addition
- strength
- 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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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims description 10
- 229910000851 Alloy steel Inorganic materials 0.000 title claims description 9
- 229910000859 α-Fe Inorganic materials 0.000 title description 2
- 239000011651 chromium Substances 0.000 claims description 18
- 230000007797 corrosion Effects 0.000 claims description 14
- 238000005260 corrosion Methods 0.000 claims description 14
- 229910052804 chromium Inorganic materials 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 11
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 30
- 239000010959 steel Substances 0.000 description 30
- 230000003647 oxidation Effects 0.000 description 13
- 238000007254 oxidation reaction Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
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- Heat Treatment Of Steel (AREA)
Description
【発明の詳細な説明】 「発明の目的」 （産業上の利用分野） 本発明はボイラー、化学プラントもしくは原子力設備用
として使用される高温強度および耐食性並びに耐酸化性
のすぐれた高クロムフェライト系合金鋼に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION "Object of the Invention" (Field of Industrial Application) The present invention is a high chromium ferrite alloy excellent in high temperature strength and corrosion resistance and oxidation resistance, which is used for boilers, chemical plants or nuclear facilities. It is about steel.
（従来の技術） ボイラー、化学プラントもしくは原子力設備用鋼材とし
て従来から使用されている著名な鋼種に、SUS304に代表
されるオーステナイト系ステンレス鋼がある。しかし乍
らこの系列の鋼は550℃以上の高温では安定した性能を
有するもののNiを重量％（以下単に％と云う）で８％以
上含有せしめるためコスト高は否めない。一方安価なフ
ェライト系耐熱鋼としては、STBA26鋼（９％Cr−１％M
o）もしくはSTBA24鋼（21/4％Cr−１％Mo）等が代替使
用されることもあるが、高温強度や耐食性が不足するた
め520℃近辺が使用上限とされていた。もっともフェラ
イト鋼の高温強度と耐酸化性を向上せしめる努力も従来
から多く試みられておりASTM A213 T91鋼（９％Cr−１
％Mo−VNb鋼）特公昭49-8765（９％Cr−１％Mo−VNb
鋼）、 （９％Cr−２％Mo鋼）等が開発されており、昨今ではこ
れらフェライト系耐熱鋼の適用上限は600℃程度まで拡
大されてきている。尚前述の他に高温強度向上のために
Moを増量したものとしては特開昭54-112718、特公昭57-
28743、同61-417等が、Nbを添加したものとして特開昭5
7-207161、特公昭57-45822等が、又、Niを添加して靱性
の向上を図った例として特開昭56-44758、同58-110661
等が提案されている。しかしこのように合金元素の添加
量を増加することは、結局コスト高を招き、オーステナ
イト鋼に比較して安価であるというフェライト鋼の特徴
が薄れつつあるのが問題となっている。(Prior Art) Austenitic stainless steel represented by SUS304 is a prominent steel type that has been conventionally used as a steel material for boilers, chemical plants, or nuclear facilities. However, although this series of steels has stable performance at high temperatures of 550 ° C. or higher, it is unavoidable that the cost is high because it contains Ni in an amount of 8% by weight (hereinafter simply referred to as%). On the other hand, as an inexpensive ferritic heat resistant steel, STBA26 steel (9% Cr-1% M
o) or STBA24 steel (21/4% Cr-1% Mo) may be used instead, but due to lack of high temperature strength and corrosion resistance, the upper limit of usage was around 520 ° C. However, many efforts have been made in the past to improve the high temperature strength and oxidation resistance of ferritic steels, and ASTM A213 T91 steel (9% Cr-1
% Mo-VNb steel) JP-B-49-8765 (9% Cr-1% Mo-VNb)
steel), (9% Cr-2% Mo steel) has been developed, and recently, the upper limit of application of these ferritic heat-resistant steels has been expanded to about 600 ° C. In addition to the above, in order to improve high temperature strength
As the amount of Mo increased, JP-A-54-112718 and JP-B-57-
28743, 61-417, etc. are disclosed in Japanese Patent Application Laid-Open No.
7-207161, JP-B-57-45822, and the like, and as examples in which Ni is added to improve toughness, JP-A-56-44758 and 58-110661.
Etc. have been proposed. However, such an increase in the amount of alloying elements eventually leads to high cost, and there is a problem that the characteristic of ferritic steel, which is less expensive than austenitic steel, is diminishing.
（発明が解決しようとする問題点） 本発明は、前述した従来技術の問題点を解決するために
創案されたものであって従来鋼に比較して前述の強化元
素の添加量は略同量もしくはむしろ少なくして、添加元
素の特殊な成分組成と組合せに特徴を持たせることによ
り、比較的低コストに高温強度、耐食性、耐酸化性の何
れもが従来のフェライト系合金鋼よりも遥かにすぐれた
ものを提供することを目的とする。(Problems to be Solved by the Invention) The present invention was devised in order to solve the above-mentioned problems of the prior art, and the addition amount of the above-mentioned strengthening element is approximately the same as that of the conventional steel. Or, rather, by reducing the amount and characterizing the special component composition and combination of the additional elements, the high temperature strength, corrosion resistance, and oxidation resistance are much lower than those of conventional ferritic alloy steels at a relatively low cost. The purpose is to provide excellent things.
「発明の構成」 （問題点を解決するための手段） 前述の目的を達成するための手段として本発明は、 （１）重量％で C:0.06〜0.15％ Si:0.50％以下 Cr:8.0〜15.0％ Mo:0.35〜0.85％ W:0.90％以下 V:0.15〜0.30％ Nb:0.01％から0.10％未満 N:0.02〜0.08％ を含み、且つ Mo＋1/2W:0.80〜1.3％ を満足し、残部はFeおよび不可避的な不純物よりなる高
温強度および耐食性のすぐれた高クロムフェライト系合
金鋼。[Structure of the Invention] (Means for Solving Problems) As means for achieving the above-mentioned object, the present invention includes: (1) C: 0.06 to 0.15% Si: 0.50% or less Cr: 8.0 to 15.0% Mo: 0.35 to 0.85% W: 0.90% or less V: 0.15 to 0.30% Nb: 0.01% to less than 0.10% N: Includes 0.02 to 0.08% and Mo + 1 / 2W: 0.80 to 1.3% is satisfied, and the balance Is a high chromium ferritic alloy steel consisting of Fe and unavoidable impurities with excellent high temperature strength and corrosion resistance.
（２）重量％で C:0.06〜0.15％ Si:0.50％以下 Cr:8.0〜15.0％ Mo:0.35〜0.85％ W:0.90％以下 V:0.15〜0.30％ Nb:0.01％から0.10％未満 N:0.02〜0.08％ を含み、且つ Mo＋1/2W:0.80〜1.3％ を満足し、更らにAl:0.05％以下、Ti:0.1％以下の何れ
か１種もしくは２種を含む残部はFeおよび不可避的な不
純物よりなる高温強度および耐食性のすぐれた高クロム
フェライト系合金鋼。(2)% by weight C: 0.06 to 0.15% Si: 0.50% or less Cr: 8.0 to 15.0% Mo: 0.35 to 0.85% W: 0.90% or less V: 0.15 to 0.30% Nb: 0.01% to less than 0.10% N: It contains 0.02 to 0.08% and Mo + 1 / 2W: 0.80 to 1.3%. Furthermore, Al: 0.05% or less, Ti: 0.1% or less, and the balance containing any one or two is Fe and unavoidable. High chromium ferritic alloy steel with excellent impurities at high temperature and excellent corrosion resistance.
をここに提供する。Provided here.
すなわち、この組成により高温強度および耐食性、耐酸
化性のすぐれた高クロムフェライト系合金鋼を得ること
ができる。That is, with this composition, it is possible to obtain a high chromium ferritic alloy steel excellent in high temperature strength, corrosion resistance and oxidation resistance.
（作用） 先ず請求範囲第１項の発明における各添加元素の範囲を
限定した理由を述べる。(Function) First, the reason for limiting the range of each additive element in the invention of claim 1 will be described.
C:0.06〜0.15％ Ｃは0.06％未満の添加では高温強度の効果がみられず、
又、過度の添加は溶接性を著しく害するため0.15％を上
限とした。C: 0.06 to 0.15% When C is added less than 0.06%, the effect of high temperature strength is not observed,
Also, excessive addition significantly impairs weldability, so 0.15% was made the upper limit.
Si:0.50％以下 Siの添加は脱酸作用の効果がありしかも良好な湯流れを
確保できる。しかし多量の添加は強度の低下、第二相析
出の促進を招くので0.50％を上限とした。Si: 0.50% or less Addition of Si has a deoxidizing effect and can secure a good molten metal flow. However, addition of a large amount leads to deterioration of strength and promotion of second phase precipitation, so 0.50% was made the upper limit.
Cr:8.0〜15.0％ 高温度、特に600℃以上で十分な耐食性、耐酸化性を保
持するためには少なくとも8.0％以上の添加が必要であ
る。しかし15.0％を超える添加では靱性および長時間の
クリープ強度が著しく低下する。Cr: 8.0 to 15.0% At least 8.0% or more is required to maintain sufficient corrosion resistance and oxidation resistance at high temperature, especially 600 ° C or higher. However, if added in excess of 15.0%, the toughness and long-term creep strength are significantly reduced.
Mo:0.35〜0.85％ Moの添加は固溶強化元素として高温強度向上に寄与す
る。Mo: 0.35 to 0.85% Addition of Mo contributes to improvement of high temperature strength as a solid solution strengthening element.
Ｗと併用しない単独の添加では0.35％以下では効果が期
待できず、一方0.85％を超えて添加すると使用時に脆化
相の析出が促進されるのでこれを上限とした。The effect cannot be expected if 0.35% or less is added alone without adding W, while the addition of more than 0.85% promotes precipitation of an embrittlement phase during use, so this was made the upper limit.
W:0.90％以下 固溶強化元素として高温強度向上に寄与する。Moとの複
合効果が大きい。上限の0.9％はMoの添加量の関係から
規制される数字。W: 0.90% or less Contributes to improvement of high temperature strength as a solid solution strengthening element. The combined effect with Mo is great. The upper limit of 0.9% is a number regulated due to the amount of Mo added.
Mo＋1/2W:0.80〜1.3％ Mo、Ｗは夫々高温強度向上に寄与するが、複合添加ほど
その効果が大きい。しかしMo＋1/2Wが1.3％を越えても
添加に伴なう強度の向上はみられずコスト高を招く。
又、0.8％未満の添加では0.8％以上の添加に比較して強
度の低下が著しいので0.80％を下限とした。Mo + 1 / 2W: 0.80-1.3% Mo and W each contribute to the improvement of high temperature strength, but the effect is greater as the compound is added. However, even if Mo + 1 / 2W exceeds 1.3%, the improvement in strength due to the addition is not seen and the cost increases.
In addition, the addition of less than 0.8% causes a marked decrease in strength as compared with the addition of 0.8% or more, so 0.80% was made the lower limit.
V:0.15〜0.30％ 炭化物形成元素として高温強度向上に寄与する。0.15％
以下では効果が少なく、0.30％を超えると溶接性を損な
い強度も低下する。V: 0.15-0.30% Contributes to the improvement of high temperature strength as a carbide forming element. 0.15%
If it is less than 0.30%, the effect is small, and if it exceeds 0.30%, the weldability is impaired and the strength is lowered.
Nb:0.01から0.10％未満 Ｖと同様に高温強度を向上させる。0.01％未満の添加で
は0.01％以上に比較して強度の低下が著しい。また0.10
％以上では高価となると共に靱性を著しく害する他高温
強度も低下する。Nb: 0.01 to less than 0.10% Improves high temperature strength like V. Addition of less than 0.01% causes a marked decrease in strength as compared with 0.01% or more. Also 0.10
% Or more, the cost becomes high, the toughness is significantly impaired, and the high-temperature strength also decreases.
N:0.02〜0.08％ Ｎは他の元素と化合し窒化物や炭窒化物を形成し高温強
度の向上に寄与する。但し0.02％未満ではその効果が十
分でなく、又、0.08％を越すと靱性および強度の低下が
著しいためこれを上限とした。N: 0.02 to 0.08% N combines with other elements to form nitrides and carbonitrides and contributes to improvement of high temperature strength. However, if it is less than 0.02%, the effect is not sufficient, and if it exceeds 0.08%, the toughness and strength are significantly deteriorated, so the upper limit was made this.
上記のようにすることにより本発明の目的とする高温強
度、耐食性のすぐれた所望の高クロムフェライト系合金
鋼が得られるが、これらの成分組成の他に更らに下記の
元素の何れか１成分もしくは双方を添加したのが、第２
発明であり、第１発明と同一の目的を達成し、更らに靱
性の改良を図ったものである。下記に数値限定の理由を
記載する。尚、本発明における耐食性とは耐酸化性も含
めた広義の解釈で記載したものである。By the above, the desired high chromium ferritic alloy steel excellent in high temperature strength and corrosion resistance which is the object of the present invention can be obtained. In addition to these component compositions, any one of the following elements 1 The addition of the ingredients or both is the second
The present invention achieves the same object as the first invention and further improves toughness. The reasons for limiting the numerical values are described below. The term "corrosion resistance" as used in the present invention is described in a broad sense including oxidation resistance.
Al:0.05％以下 Alの添加は鋼の清浄化が図られて靱性が向上するので有
効であるが、0.05％を超える添加は強度の低下を招く。Al: 0.05% or less Addition of Al is effective because it cleans the steel and improves toughness, but addition of more than 0.05% causes reduction in strength.
Ti:0.10％以下 Tiは靱性の向上に有効である。但し、0.10％以上の添加
は強度の低下を招くので0.10％を上限とした。Ti: 0.10% or less Ti is effective in improving toughness. However, addition of 0.10% or more causes a decrease in strength, so 0.10% was made the upper limit.
（実施例） 次に150kg真空炉で溶製した本発明鋼８チャージ、比較
のための公知の高クロムフェライト系合金鋼（比較鋼）
13チャージの化学組成と実験結果を第１表に示す。(Example) Next, the present invention steel 8 charge melted in a 150 kg vacuum furnace, a known high chromium ferritic alloy steel for comparison (comparative steel)
Table 1 shows the chemical composition of 13 charges and the experimental results.
試験片はインゴットを1150℃に加熱し熱間圧延（圧下率
約93％）し板厚13mmに仕上げた。 The ingot was heated to 1150 ℃ and hot-rolled (reduction ratio about 93%) to finish the test piece to 13mm thickness.
各試験材とも1050℃で40分焼準した後、780℃で90分の
焼戻を行ない、圧延方向にクリープ、シャルピー、腐食
試験の各片を切り出した。クリープ試験は各材600℃で
応力水準を４〜５レベルにふらし、104時間破断応力を
外挿した。シャルピー試験は焼準、焼戻材を対象に15〜
20本行ない被面遷移温度を求めた。又、大気酸化試験は
各材とも25×15×5mmの小片を全面＃800まで湿式研磨を
施した後、直示天秤で秤量後、流量１/minの80％N2−
20％O2ガスを循環させた電気炉中で600℃で500時間保持
した。そして試験後再秤量を行ない試験前の重量と比較
した。After normalizing each test material at 1050 ° C. for 40 minutes, it was tempered at 780 ° C. for 90 minutes, and each piece of creep, Charpy and corrosion test was cut out in the rolling direction. In the creep test, the stress level was set to 4 to 5 at 600 ° C. for each material, and the breaking stress for 10 4 hours was extrapolated. Charpy test is for normalizing and tempering materials 15 ~
Twenty runs were performed and the surface transition temperature was obtained. Further, after the air oxidation test which has been subjected to wet grinding pieces of 25 × 15 × 5 mm in each timber until the entire surface # 800, after weighing in a direct-reading balance, 80% of the flow rate 1 / min N 2 -
It was kept at 600 ° C. for 500 hours in an electric furnace in which 20% O 2 gas was circulated. After the test, reweighing was performed and the weight was compared with that before the test.
第１図は縦軸に酸化増量（g/m2、500h）、横軸に600℃
×104時間クリープ破断応力をとり、実験に供した本発
明鋼並びに比較鋼の実験結果をプロットしたものであ
る。実験結果では、本発明鋼Ａ〜Ｈは何れも600℃×104
時間クリープ破断応力が13.5kgf/mm2以上の高強度を示
している。しかし乍ら比較鋼Ｉ（低Ｃ）、Ｊ（高Mn）、
Ｌ（高Cr）、Ｍ（Ｗ無添加）、Ｐ（低Ｖ）、Ｑ（高
Ｖ）、Ｒ（Nb無添加）、Ｓ（高Nb）、Ｔ（低Ｎ）、Ｕ
（高Ｎ）は、全部前記破断応力は13.5kgf/mm2より低い
位置にある。In Fig. 1, the vertical axis is the oxidation weight gain (g / m 2 , 500h), the horizontal axis is 600 ° C.
This is a plot of the experimental results of the steel of the present invention and the comparative steel used in the experiment by taking the creep rupture stress of × 10 4 hours. According to the experimental results, all of the invention steels A to H are 600 ° C. × 10 4
It shows high strength with time creep rupture stress of 13.5 kgf / mm 2 or more. However, comparative steels I (low C), J (high Mn),
L (high Cr), M (no W added), P (low V), Q (high V), R (no Nb added), S (high Nb), T (low N), U
In the case of (high N), the breaking stress is all lower than 13.5 kgf / mm 2 .
又、比較鋼Ｎ、Ｏ、Ｋの３種は高強度を有しているが、
Ｎ、Ｏ、についてはMo＋1/2Wが2.0％を越えており、M
o、Ｗの過剰な添加は高温強度の改善には寄与していな
いことを裏づけている。ＫはCr量が7.1％であるが大気
酸化試験の酸化増量が1g/m2500hを越えており耐食性、
耐酸化性が12％Cr鋼より劣ることが認められた。Also, the three types of comparative steels N, O and K have high strength,
Regarding N and O, Mo + 1 / 2W exceeds 2.0%, and M
This proves that the excessive addition of o and W does not contribute to the improvement of high temperature strength. K has a Cr content of 7.1%, but the oxidation increase in the atmospheric oxidation test exceeds 1 g / m 2 500 h, and corrosion resistance,
It was found that the oxidation resistance was inferior to 12% Cr steel.
「発明の効果」 本発明鋼は、従来の高クロムフェライト系合金鋼に比較
して高価な強化元素の添加量は略同量もしくはむしろ少
いにも拘らず各主要元素の適格な成分組成の選択と組合
せにより、従来鋼よりも高温強度、耐食性並びに耐酸化
性が遥かにすぐれた高クロムフェライト系合金鋼の特性
が得られるので、ボイラー、化学プラント、原子力設備
用等として最適な鋼材を市場に提供することができる。"Effects of the Invention" The steel of the present invention has the same amount of expensive strengthening elements as the conventional high chromium ferritic alloy steels, although the addition amount of the expensive strengthening elements is almost the same or rather small By selecting and combining, the properties of high chromium ferritic alloy steel, which has much higher temperature strength, corrosion resistance and oxidation resistance than conventional steel, can be obtained, so the optimum steel material for boilers, chemical plants, nuclear facilities, etc. is marketed. Can be provided to.
第１図は各供試鋼のクリープ破断特性と酸化増量の関係
を示す図表である。FIG. 1 is a table showing the relationship between the creep rupture characteristics and the oxidation weight increase of each sample steel.
Claims (2)
温強度および耐食性のすぐれた高クロムフェライト系合
金鋼。1. By weight%, C: 0.06 to 0.15% Si: 0.50% or less Cr: 8.0 to 15.0% Mo: 0.35 to 0.85% W: 0.90% or less V: 0.15 to 0.30% Nb: 0.01% to less than 0.10% A high chromium ferritic alloy steel containing N: 0.02-0.08%, Mo + 1 / 2W: 0.80-1.3%, and the balance being Fe and inevitable impurities with excellent high-temperature strength and corrosion resistance.
れか１種もしくは２種を含み残部はFeおよび不可避的な
不純物よりなる高温強度および耐食性のすぐれた高クロ
ムフェライト系合金鋼。2. By weight%, C: 0.06 to 0.15% Si: 0.50% or less Cr: 8.0 to 15.0% Mo: 0.35 to 0.85% W: 0.90% or less V: 0.15 to 0.30% Nb: 0.01% to less than 0.10% N: 0.02-0.08% is included, Mo + 1 / 2W: 0.80-1.3% is satisfied, and further, Al: 0.05% or less, Ti: 0.1% or less, any one kind or two kinds, and the balance is Fe. High-chromium ferritic alloy steel consisting of unavoidable impurities and excellent high-temperature strength and corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61247379A JPH0778268B2 (en) | 1986-10-20 | 1986-10-20 | High chrome ferrite alloy steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61247379A JPH0778268B2 (en) | 1986-10-20 | 1986-10-20 | High chrome ferrite alloy steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63103053A JPS63103053A (en) | 1988-05-07 |
| JPH0778268B2 true JPH0778268B2 (en) | 1995-08-23 |
Family
ID=17162550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61247379A Expired - Fee Related JPH0778268B2 (en) | 1986-10-20 | 1986-10-20 | High chrome ferrite alloy steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0778268B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735759A (en) * | 2018-12-29 | 2019-05-10 | 河钢股份有限公司承德分公司 | A method of the high chromium hot melt containing vanadium smelts highly corrosion resistant rolling stock steel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5817820B2 (en) * | 1979-02-20 | 1983-04-09 | 住友金属工業株式会社 | High temperature chrome steel |
| JPS5745822A (en) * | 1980-09-03 | 1982-03-16 | Mitsuharu Yamaguchi | Carpet |
-
1986
- 1986-10-20 JP JP61247379A patent/JPH0778268B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735759A (en) * | 2018-12-29 | 2019-05-10 | 河钢股份有限公司承德分公司 | A method of the high chromium hot melt containing vanadium smelts highly corrosion resistant rolling stock steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63103053A (en) | 1988-05-07 |
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