JPH03215622A - Walking beam - Google Patents
Walking beamInfo
- Publication number
- JPH03215622A JPH03215622A JP2008929A JP892990A JPH03215622A JP H03215622 A JPH03215622 A JP H03215622A JP 2008929 A JP2008929 A JP 2008929A JP 892990 A JP892990 A JP 892990A JP H03215622 A JPH03215622 A JP H03215622A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- walking beam
- walking beams
- compsn
- build
- 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
- 239000000463 material Substances 0.000 claims abstract description 13
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract 2
- 239000007921 spray Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 26
- 239000010959 steel Substances 0.000 abstract description 26
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 229910001208 Crucible steel Inorganic materials 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007751 thermal spraying Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ウォーキングビーム式熱処理炉のウォーキン
グビームに関するものである．（従来の技術）
継目無鋼管製造設備のウォーキングビーム式鋼管熱処理
炉のウォーキングビームは高温下で使用される為、耐酸
化性及び耐高温強度に優れたＪＩＳＳＣＨ２２ （２５
Ｃｒ − ２０Ｎｉ ）等の耐熱鋳鋼が一般に使用され
ている。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a walking beam of a walking beam heat treatment furnace. (Prior art) Walking beams of walking beam type steel pipe heat treatment furnaces in seamless steel pipe manufacturing equipment are used at high temperatures, so JISSCH22 (25
Heat-resistant cast steel such as Cr-20Ni) is generally used.
ところで近年、従来は熱間加工後冷間で製造していた鋼
管を、■コスト合理化のために熱間仕上げで製品にする
鋼管や、■高寸法精度が必要とされる鋼管や、■微小外
面班が問題となる鋼管、等、鋼管に対する品質要求条件
がきびしくなってきている。By the way, in recent years, steel pipes that were conventionally produced by hot working and then cold processing have been replaced with products that are manufactured using hot finishing to reduce costs, steel pipes that require high dimensional accuracy, and microscopic external surfaces. The quality requirements for steel pipes, such as steel pipes, which are a problem, are becoming stricter.
そして、前記品質要求条件のうちの外面疵については、
（ｉ）材質（製鋼）に起因するもの、（ ｉｉ ）圧延
工程に起因するもの、（ｉｎ）搬送工程に起因するもの
、があり、このうち鋼管熱処理炉内で発生する外面疵は
搬送工程に起因する外面疵の範晴である。具体的にはウ
ォーキングビームの鋼管との接触面に発生するスケール
の焼付き物すなわちピルドアップによって、このウォー
キングビーム上に載った鋼管の外周面に押込み疵がつき
、これが品質上問題となっていた．
一度発生したピルドアップは、ウォーキングビームの表
面に強固に付着するため、それ以降に通過する全鋼管に
外面疵をつけることになる。従って、ピルドアップを除
去することが必要となるが、炉内は高温状態であるため
、ピルドアップを炉外から除去することは困難である。Regarding external defects among the above quality requirements,
There are (i) those caused by the material (steel manufacturing), (ii) those caused by the rolling process, and (in) those caused by the transportation process. Among these, external defects that occur in the steel pipe heat treatment furnace are caused by the transportation process. There are no external defects caused by this. Specifically, scale burn-in, or pill-up, occurs on the contact surface of the walking beam with the steel pipe, causing indentation scratches on the outer circumferential surface of the steel pipe placed on the walking beam, which poses a quality problem. Once pilled up occurs, it firmly adheres to the surface of the walking beam, causing external flaws to all steel pipes that pass through it thereafter. Therefore, it is necessary to remove the pill-up, but since the inside of the furnace is in a high temperature state, it is difficult to remove the pill-up from outside the furnace.
そこで従来は定期的に炉を消火し、炉内に作業者が入っ
てグラインダー等でピルドアンブを除去していたため、
炉の昇温、冷却による燃料原単位の悪化も問題となって
おり、ピルドアップの発生しないウォーキングビームの
開発が要求されていた。Conventionally, the furnace would be extinguished periodically and a worker would enter the furnace and remove the pilled amber with a grinder, etc.
Deterioration of the fuel consumption rate due to heating and cooling of the furnace has also become a problem, and there has been a demand for the development of a walking beam that does not cause pill-up.
（発明が解決しようとする課題）
ウォーキングビームのピルドアソプ発生に対し、従来よ
りウォーキングビームの材質を変更したり、溶射セラミ
ックス等の表面コーティングの変更が種々行われてきた
が、十分なピルドアップ防止効果は得られていないのが
実情である。(Problem to be Solved by the Invention) Various attempts have been made to prevent pill-up from occurring in walking beams, such as changing the material of the walking beam or changing surface coatings such as thermal sprayed ceramics. The reality is that we are not getting it.
すなわち、ウォーキングビームは、高温・酸化環境下で
使用されるため、材質を変更してもその表面の酸化劣化
により焼付きは防止できない。また、溶射等についても
ウォーキングビームと溶射材料との熱膨張差により、コ
ーティング層が剥離するからである。That is, since walking beams are used in high-temperature, oxidizing environments, even if the material is changed, seizure cannot be prevented due to oxidative deterioration of the surface. Further, in thermal spraying, etc., the coating layer peels off due to the difference in thermal expansion between the walking beam and the thermal spraying material.
本発明は、かかる問題点に鑑みて成されたものであり、
皮膜の剥離を解決し、耐ピルドアップの要求性能を満た
すウォーキングビームを提供することを目的としている
。The present invention has been made in view of such problems,
The objective is to provide a walking beam that solves the problem of peeling of the film and meets the required performance for pill-up resistance.
（課題を解決するための手段）
上記目的を達成するために本発明に係る第１のウォーキ
ングビームは、重量％で、Ｃｒ ： １５〜４０％、Ａ
ｌ：３〜２０％、Ｙ ： ０．０１〜２％を含有し、残
部がＣｏからなるＭＣｒＡｌＸ合金（ＭにＣｏ， Ｘに
Ｙを使用）に、ＡｈＯｓセラミックを体積比で５０％以
下配合してなる溶射材料を、被加熱材との接触面に０．
０２〜２圓の厚さで被覆しているのである。(Means for Solving the Problems) In order to achieve the above object, a first walking beam according to the present invention has Cr: 15-40%, A
A MCrAlX alloy containing 3 to 20% L, 0.01 to 2% Y, and the remainder Co (using Co for M and Y for X) is blended with AhOs ceramic at a volume ratio of 50% or less. 0.0% thermal spray material on the contact surface with the heated material.
It is coated with a thickness of 0.2 to 2 mm.
また本発明の第２のウォーキングビームは、前記第１の
ウォーキングビームのＹに代えてＨｆ， Ｓｉ、Ｔｉ，
Ｚｒを０．０１〜２０％含有させているのである。Moreover, the second walking beam of the present invention has Hf, Si, Ti,
It contains Zr in an amount of 0.01 to 20%.
また本発明の第３のウォーキングビームは、前記第１の
ウォーキングビームのＹ， Ｈｆ， Ｓｔ， Ｔｉ、Ｚ
ｒとともにＷ， Ｍｏ， Ｎｂ， Ｔａ， Ｔｉ， Ｃ
を組み合わせて０．０１〜２０％含有させているのであ
る。Further, the third walking beam of the present invention has Y, Hf, St, Ti, Z of the first walking beam.
With r W, Mo, Nb, Ta, Ti, C
The content is 0.01 to 20% in combination.
すなわち本発明は、耐熱、耐焼付性に優れたＭＣｒＡ
Ｉ Ｘ合金をベース材料としている。その理由は、ＭＣ
ｒＡｌＸ合金は成分中のＡＩ及びＣｒが選択的に酸化さ
れ、その組成によりＡＩ！Ｏ：ｌ又はＣｒｚ０３の緻密
で化学的にも安定な保護性酸化膜を形成するため、スケ
ールやＦｅ合金と反応せずピルドアップを防止できるか
らである。That is, the present invention provides MCrA with excellent heat resistance and seizure resistance.
The base material is IX alloy. The reason is MC
In rAlX alloy, AI and Cr in the components are selectively oxidized, and due to its composition, AI! This is because a dense and chemically stable protective oxide film of O:l or Crz03 is formed, so it does not react with scale or Fe alloy and pill-up can be prevented.
次に本発明の限定理由について説明する。Next, the reasons for the limitations of the present invention will be explained.
（Ｃｒ） ：Ｃｒは保護性酸化皮膜のＣｒ２Ｏ３を形
成する元素であると同時に、ＡＩの活性化を果たし、Ａ
ｈＯｓの安定生成を促進する。(Cr): Cr is an element that forms the protective oxide film Cr2O3, and at the same time activates AI and
Promotes stable production of hOs.
しかし、■５％未満であるとこれらの効果が乏しくなり
、一方４０％を超えると溶射皮〔ＡＩ〕
（Ｙ）
膜の延性低下を招く。However, if the content is less than 5%, these effects will be poor, while if it exceeds 40%, the ductility of the thermally sprayed coating [AI] (Y) film will decrease.
従って、１５〜４０％とした。Therefore, it was set at 15 to 40%.
：Ａｌは保護性酸化皮膜のＡＩ．０！を形成する元素で
ある。:Al is the protective oxide film AI. 0! It is an element that forms
しかし、３％未満では連続したＡｌｚ０３膜が形成され
ず、一方２０％を超えると溶射皮膜の延性低下を招く。However, if it is less than 3%, a continuous Alz03 film will not be formed, while if it exceeds 20%, the ductility of the sprayed coating will decrease.
従って３〜２０％とした。Therefore, it was set at 3 to 20%.
他：Ｙは保護性酸化皮膜（ＣｒｚＯｉ 、Ａｌ２Ｏ３）
の耐剥離性向上機能を有する。Others: Y is a protective oxide film (CrzOi, Al2O3)
It has the ability to improve peeling resistance.
しかし、Ｙの場合は、０．０１％未満では効果が乏しく
なり、一方２％を超えると溶射皮膜の延性低下を招く。However, in the case of Y, if it is less than 0.01%, the effect will be poor, while if it exceeds 2%, the ductility of the sprayed coating will decrease.
従ってＹの含有率は０．０１〜２％とした。Therefore, the content of Y was set at 0.01 to 2%.
このＹに対し、Ｙの代替である例えば
Ｈｆ， Ｓｉ， Ｔｉ， ＺｒやＹ， ＨｆＳＳｉ，
Ｔｉ， Ｚｒとの組合せである例えばＷ，Ｍｏ、Ｎｂ，
Ｔａ、Ｔｉ， Ｃを含有する場合は、最高２０％まで
添加することができ、これによって高温強度や耐酸化性
の改善を図ることができる。For this Y, substitutes for Y such as Hf, Si, Ti, Zr, Y, HfSSi,
For example, W, Mo, Nb, which is a combination with Ti, Zr.
When Ta, Ti, and C are contained, they can be added up to a maximum of 20%, which can improve high-temperature strength and oxidation resistance.
（Ｃｏ） ：Ｃｏは高温強度に優れたベース金属であ
り、Ｃｒ， ＡＩ， Ｙ他を除いた残りとする。(Co): Co is a base metal with excellent high-temperature strength, and is the remainder after removing Cr, AI, Y, and others.
（Ａ１ｚ０３セラミック）：ＡｈＯｓセラミックは皮膜
に耐摩耗性能を付与するために複合させるものである。(A1z03 ceramic): AhOs ceramic is compounded to impart wear resistance to the coating.
しかし、含有量が体積比で５０％を超えると皮膜が脆く
なって剥離し易くなり、また多孔賞となる。However, if the content exceeds 50% by volume, the film becomes brittle and easily peels off, and becomes porous.
従って、Ａｌｚ０３セラミックの配合量を５０％以下と
した。Therefore, the blending amount of Alz03 ceramic was set to 50% or less.
〔皮膜厚さ〕 ：皮膜厚さが０．０２ｍｍ以下では母材
表面を完全に被覆することが困難である。[Coating thickness]: If the coating thickness is 0.02 mm or less, it is difficult to completely cover the surface of the base material.
方、２ＩＩＩＩＩ１以上では膜厚が厚すぎて剥離し易く
なる。On the other hand, if the thickness is 2III1 or more, the film thickness will be too thick and peeling will occur easily.
従って、０．０２〜２ＩＩＩＩＩ１とした。Therefore, it was set as 0.02 to 2III1.
なお、施工方法は高融点材に有利なプラズマ溶射法や高
速ガス溶射法が適しているが、特に限定はしない。In addition, as for the construction method, the plasma spraying method and the high-speed gas spraying method, which are advantageous for high melting point materials, are suitable, but there is no particular limitation.
（実 施 例） 以下本発明を添付図面に基づいて説明する。(Example) The present invention will be explained below based on the accompanying drawings.
添付図面は、本発明に係るウォーキングビームの正面図
であり、ウォーキングビーム１は固定ビームと移動ビー
ムとで構成され、移動ビームの上昇、水平往復移動、下
降の周期的な繰り返しにより、鋼管を固定ビームと移動
ビームとに交互に移し替えなから１ポケットずつ鋼管を
わずかに回転させながら熱処理炉内を搬送するものであ
る。The attached drawing is a front view of a walking beam according to the present invention, and the walking beam 1 is composed of a fixed beam and a moving beam, and the steel pipe is fixed by the periodic repetition of the moving beam's upward movement, horizontal reciprocating movement, and downward movement. Since the steel pipes are transferred alternately between the beam and the moving beam, the steel pipes are conveyed through the heat treatment furnace while being rotated slightly one pocket at a time.
ところで、熱処理炉内の雰囲気温度は最大１１００゜Ｃ
の高温に保持されているので、ウォーキングビーム１の
本体２は耐熱鋳鋼が使用されている。そして、鋼管との
接触面は凹彎曲面と成されており、隣接する鋼管が一定
間隔で載置できるように成されている。By the way, the ambient temperature inside the heat treatment furnace is 1100°C at maximum.
Since the walking beam 1 is maintained at a high temperature, the main body 2 of the walking beam 1 is made of heat-resistant cast steel. The contact surface with the steel pipe is a concave curved surface so that adjacent steel pipes can be placed at regular intervals.
しかして、ピルドアップはこの鋼管との接触面に発生す
る。Therefore, pill-up occurs at the contact surface with this steel pipe.
そこで、本発明では、この接触面に例えばＣｏ残２５Ｃ
ｒ−１４ＡＩ Ｏ．５ Ｙにａｔｔｏｔを体積比で３
０％配合してなる溶射材料３を０．４閣の厚さでガスプ
ラズマで溶射するのである。Therefore, in the present invention, for example, 25C of Co remains on this contact surface.
r-14AI O. 5 Attot to Y in volume ratio 3
The thermal spraying material 3 containing 0.0% is thermally sprayed to a thickness of 0.4 mm using gas plasma.
下記表に本発明ウォーキングビームと従来のウォーキン
グビーム並びに比較例を使用して実機テストを行った結
果を示す。The table below shows the results of an actual machine test using the walking beam of the present invention, a conventional walking beam, and a comparative example.
上記表より明らかな如く本発明はピルドアップの発生も
なく、被覆層の剥離もなかった．しかし、比較例、従来
例は共にピルドアップが発生し、また被覆層の剥離がみ
られた。As is clear from the table above, in the present invention, there was no pill-up and no peeling of the coating layer. However, in both the comparative example and the conventional example, pill-up occurred and peeling of the coating layer was observed.
（発明の効果）
以上説明したように、本発明ウォーキングビームを採用
すれば手入れに要する時間が不要となって燃料原単位が
良くなると共に品質良好な鋼管を製造できる．(Effects of the Invention) As explained above, by adopting the walking beam of the present invention, the time required for maintenance becomes unnecessary, the fuel consumption rate improves, and steel pipes of good quality can be manufactured.
図面は本発明ウォーキングビームの正面図である． The drawing is a front view of the walking beam of the present invention.
Claims (3)
０％、Ｙ：０．０１〜２％を含有し、残部がＣｏからな
るＭＣｒＡｌＸ合金（ＭにＣｏ、ＸにＹを使用）に、Ａ
ｌ＿２Ｏ＿３セラミックを体積比で５０％以下配合して
なる溶射材料を、被加熱材との接触面に０．０２〜２ｍ
ｍの厚さで被覆したことを特徴とするウォーキングビー
ム。(1) In weight%, Cr: 15-40%, Al: 3-2
A
A thermal spray material containing 50% or less of l_2O_3 ceramic by volume is applied to the contact surface with the heated material by 0.02 to 2 m.
A walking beam characterized by being coated with a thickness of m.
Ｙに代えてＨｆ、Ｓｉ、Ｔｉ、Ｚｒを０．０１〜２０％
含有したことを特徴とするウォーキングビーム。(2) In the walking beam according to claim 1,
0.01 to 20% of Hf, Si, Ti, and Zr in place of Y
A walking beam characterized by containing.
Ｙ、Ｈｆ、Ｓｉ、Ｔｉ、ＺｒとともにＷ、Ｍｏ、Ｎｂ、
Ｔａ、Ｔｉ、Ｃを組み合わせて０．０１〜２０％含有し
たことを特徴とするウォーキングビーム。(3) In the walking beam according to claim 1,
Along with Y, Hf, Si, Ti, and Zr, W, Mo, Nb,
A walking beam characterized by containing 0.01 to 20% of a combination of Ta, Ti, and C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008929A JPH03215622A (en) | 1990-01-17 | 1990-01-17 | Walking beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008929A JPH03215622A (en) | 1990-01-17 | 1990-01-17 | Walking beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03215622A true JPH03215622A (en) | 1991-09-20 |
Family
ID=11706352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008929A Pending JPH03215622A (en) | 1990-01-17 | 1990-01-17 | Walking beam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03215622A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100280016B1 (en) * | 1994-08-26 | 2001-02-01 | 로버트 에이. 바쎄트 | High durability roadbed rolls |
| JP2006275499A (en) * | 2005-03-01 | 2006-10-12 | Ngk Insulators Ltd | Continuous heat treatment furnace and heat treatment method |
| US7645136B2 (en) | 2004-10-04 | 2010-01-12 | Ngk Insulators, Ltd. | Continuous heat treatment furnace and heat treatment method |
| JP2014167166A (en) * | 2013-02-14 | 2014-09-11 | Praxair St Technol Inc | SELECTIVE OXIDATION OF MODIFIED MCrAlY COMPOSITION LOADED WITH HIGH LEVELS OF CERAMIC ACTING AS BARRIER TO SPECIFIC OXIDE FORMATIONS |
| CN107099700A (en) * | 2017-05-15 | 2017-08-29 | 深圳市万泽航空科技有限责任公司 | A kind of method for preparing CoCrAlY alloy target materials |
Citations (6)
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| JPS61106763A (en) * | 1984-10-30 | 1986-05-24 | Toshiba Corp | Thermal spraying alloy powder |
| JPS61136649A (en) * | 1984-12-06 | 1986-06-24 | アブコウ・コーポレイシヨン | High strength nickel monocrystralline alloy |
| JPS62183950A (en) * | 1986-02-06 | 1987-08-12 | Nippon Steel Corp | Thermal spraying roll for hot casting slab |
| JPS6331531A (en) * | 1986-07-24 | 1988-02-10 | Ishikawajima Harima Heavy Ind Co Ltd | High pressure generator |
| JPH01139715A (en) * | 1987-11-25 | 1989-06-01 | Kubota Ltd | Hearth roll having superior build-up resistance |
| JPH01259117A (en) * | 1988-04-07 | 1989-10-16 | Nippon Steel Corp | Roll for heat treatment furnace |
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| JPS61106763A (en) * | 1984-10-30 | 1986-05-24 | Toshiba Corp | Thermal spraying alloy powder |
| JPS61136649A (en) * | 1984-12-06 | 1986-06-24 | アブコウ・コーポレイシヨン | High strength nickel monocrystralline alloy |
| JPS62183950A (en) * | 1986-02-06 | 1987-08-12 | Nippon Steel Corp | Thermal spraying roll for hot casting slab |
| JPS6331531A (en) * | 1986-07-24 | 1988-02-10 | Ishikawajima Harima Heavy Ind Co Ltd | High pressure generator |
| JPH01139715A (en) * | 1987-11-25 | 1989-06-01 | Kubota Ltd | Hearth roll having superior build-up resistance |
| JPH01259117A (en) * | 1988-04-07 | 1989-10-16 | Nippon Steel Corp | Roll for heat treatment furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100280016B1 (en) * | 1994-08-26 | 2001-02-01 | 로버트 에이. 바쎄트 | High durability roadbed rolls |
| US7645136B2 (en) | 2004-10-04 | 2010-01-12 | Ngk Insulators, Ltd. | Continuous heat treatment furnace and heat treatment method |
| JP2006275499A (en) * | 2005-03-01 | 2006-10-12 | Ngk Insulators Ltd | Continuous heat treatment furnace and heat treatment method |
| JP2014167166A (en) * | 2013-02-14 | 2014-09-11 | Praxair St Technol Inc | SELECTIVE OXIDATION OF MODIFIED MCrAlY COMPOSITION LOADED WITH HIGH LEVELS OF CERAMIC ACTING AS BARRIER TO SPECIFIC OXIDE FORMATIONS |
| CN107099700A (en) * | 2017-05-15 | 2017-08-29 | 深圳市万泽航空科技有限责任公司 | A kind of method for preparing CoCrAlY alloy target materials |
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