JPH0244149A - Solar heat selective absorption plate and its manufacturing method - Google Patents
Solar heat selective absorption plate and its manufacturing methodInfo
- Publication number
- JPH0244149A JPH0244149A JP63196414A JP19641488A JPH0244149A JP H0244149 A JPH0244149 A JP H0244149A JP 63196414 A JP63196414 A JP 63196414A JP 19641488 A JP19641488 A JP 19641488A JP H0244149 A JPH0244149 A JP H0244149A
- Authority
- JP
- Japan
- Prior art keywords
- less
- plate
- stainless steel
- solar heat
- surface roughness
- 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
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 23
- 239000010935 stainless steel Substances 0.000 claims abstract description 23
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000003746 surface roughness Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910002060 Fe-Cr-Al alloy Inorganic materials 0.000 claims abstract description 9
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000005488 sandblasting Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 12
- 238000011282 treatment Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000011651 chromium Substances 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000007654 immersion Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 150000004679 hydroxides Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 230000005457 Black-body radiation Effects 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- -1 chlorochloric acid-sulfuric acid Chemical compound 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- KPVWDKBJLIDKEP-UHFFFAOYSA-L dihydroxy(dioxo)chromium;sulfuric acid Chemical compound OS(O)(=O)=O.O[Cr](O)(=O)=O KPVWDKBJLIDKEP-UHFFFAOYSA-L 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical class [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/10—Details of absorbing elements characterised by the absorbing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/60—Details of absorbing elements characterised by the structure or construction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、耐良性に優れ、しかも太陽光線の放射率を大
きくすることなく、吸収率を向上させたＦ ｅ −Ｃｒ
−１′％ｌステンレス鋼から成る太陽熱選択吸収板お
よびその製造方法に関するものであり、たとえば太陽熱
ニオ・ルギを捕捉する集熱器などのために有利に実施す
ることができる太陽熱選択吸収板およびその製造方法に
関する。[Detailed Description of the Invention] Industrial Application Field The present invention provides F e -Cr which has excellent durability and has improved absorption rate without increasing the emissivity of sunlight.
- This relates to a solar heat selective absorption plate made of 1'%l stainless steel and its manufacturing method, and the solar heat selective absorption plate and its manufacturing method can be advantageously implemented, for example, in a collector for capturing solar heat. Regarding the manufacturing method.
従来の技術
典型的な先行技術は、特開昭５２−１０２８４４に示さ
れている。従来からの太陽熱選択吸収板は、銅またはア
ルミニラノーなどの金属板の表面に、太陽光線に対して
選択性のある皮膜を付与し、太陽光線の放射率を大きく
することなしに吸収率を向上させるように構成されてい
る。放射率および吸収率は、黒体放射との比を言う、金
属板表面の粗度を変化させることによって、金属板表面
上での太陽光線の反射回数を増加させて吸収率を大きく
することが可能である。Prior Art A typical prior art is shown in Japanese Patent Application Laid-Open No. 52-102844. Conventional solar heat selective absorption plates provide a coating that is selective to sunlight on the surface of a metal plate such as copper or aluminum lanow, improving the absorption rate without increasing the emissivity of sunlight. It is configured as follows. Emissivity and absorption rate refer to the ratio to blackbody radiation. By changing the roughness of the metal plate surface, the number of reflections of sunlight on the metal plate surface can be increased and the absorption rate can be increased. It is possible.
この先行技術では、太陽熱に対して選択性のある皮膜を
付与する過程において、基板になる金属板を該金属板に
対して［食性を有する液体に浸漬したり、陽極酸化処理
を施したり、メツキ処理したりする為、表面粗度を自由
にコントロールすることが困難であり、その目的とする
表面の形状を得ることができない。In this prior art, in the process of applying a film that is selective to solar heat, the metal plate that will become the substrate is immersed in an erodible liquid, anodized, or plated. It is difficult to freely control the surface roughness due to various treatments, and it is not possible to obtain the desired surface shape.
他の先行技術は、真空蒸着法などによって、成る程度金
属板表面の形状をコントロールしている。In other prior art techniques, the shape of the metal plate surface is controlled to some extent by vacuum evaporation or the like.
このような先行技術では、大きな面積を１度に処理する
ことが難しく、処理が繁雑であり、非常に高価なものに
なってしまうという問題がある。Such prior art has problems in that it is difficult to process a large area at one time, the process is complicated, and it becomes very expensive.
さらに他の先行技術では、ステンレス鋼板を表面粗度が
０．２〜１．０μｍの範囲内になる如く、表面前処理を
施した後、該ステンレス鋼板を酸化性のあるクロｌゎ酸
−硫酸水溶液中に浸漬処理して黒色皮膜を形成させる。Furthermore, in another prior art, a stainless steel plate is subjected to surface pretreatment so that the surface roughness is within the range of 0.2 to 1.0 μm, and then the stainless steel plate is treated with oxidizing chlorochloric acid-sulfuric acid. A black film is formed by immersion in an aqueous solution.
このような先行技術では、ステンレス鋼板の表面にクロ
ム・鉄のスピネル構造の酸化物、水酸化物若しくは、ニ
ッケルの酸化物、水酸化物などの黒色皮膜が形成されて
いるが、耐食性に劣り、結露−乾燥の繰返しを受けると
、短期間で発錆してしまう。In such prior art, a black film is formed on the surface of the stainless steel plate using spinel-structured oxides and hydroxides of chromium and iron, or nickel oxides and hydroxides, but these have poor corrosion resistance. If exposed to repeated condensation and drying, it will rust in a short period of time.
発明が解決すべき課題
本発明の目的は、表面粗度をコントロールすることが容
易であり、作業性が向上され、発錆を防ぎ、こうして耐
食性に優れ、しかも太陽光線の放射率を大きくすること
なしに、吸収率を向上させることができるようにした太
陽熱選択吸収板およびその製造方法を提供することであ
る。Problems to be Solved by the Invention The purpose of the present invention is to easily control the surface roughness, improve workability, prevent rust, and thus have excellent corrosion resistance, and increase the emissivity of sunlight. It is an object of the present invention to provide a solar heat selective absorption plate and a method for manufacturing the same, which can improve the absorption rate without any heat absorption.
課題を解決するための手段
本発明は、Ｃｒ１２〜２８重１％、Ａｌ１〜６重量％を
含有するＦｅ−Ｃｒ−Ａｌステンレス鋼板の素地表面を
Ｒａで表示して、９．２〜１．０μｍの表面粗度を有し
、かつ、該表面に０．１μｍ以上、１．０μｍ未満の長
さのアルミナウィスカを有することを特徴とする太陽熱
選択吸収板である。Means for Solving the Problems The present invention provides that the base surface of a Fe-Cr-Al stainless steel plate containing 12 to 28% Cr and 1% to 6% Al by weight is 9.2 to 1.0 μm expressed by Ra. This is a solar heat selective absorption plate characterized by having a surface roughness of , and having alumina whiskers on the surface having a length of 0.1 μm or more and less than 1.0 μm.
また本発明は、Ｃｒ１２〜２８重量２６、Ａｔ １−６
重量％を含有するＦｅ−Ｃｒ−Ａｌステンレス鋼板の表
面粗度がＲａで表示して、０．２〜１゜０μｍの範囲内
になる如く表面前処理を施した後、酸化性雰囲気で８５
０〜１０００℃、１〜４時間保持することを特徴とする
太陽熱選択吸収板の製造方法である。Further, the present invention has Cr12-28 weight 26, At 1-6
After pre-treating the surface so that the surface roughness of the Fe-Cr-Al stainless steel sheet containing 100% by weight is within the range of 0.2 to 1.0 μm in Ra, it is heated to 85% by weight in an oxidizing atmosphere.
This is a method for manufacturing a solar heat selective absorption plate, which is characterized by holding the solar heat selectively absorbing plate at 0 to 1000°C for 1 to 4 hours.
さらにまた本発明は、Ｃｒ１２〜２８重量％、ＡＩ １
〜６重量％を含有するＦｅ−Ｃｒ−Ａｔステンレス鋼板
の表面粗度がＲａで表示して、０゜２〜１．０μｍの範
囲内になる如く表面前処理を施した侠、酸素濃度０．１
％以下の雰囲気で７００〜１０００℃、１０秒間以上保
持後、大気雰囲気で８５０〜１０００℃、１〜４時間保
持することを特徴とする太陽熱選択吸収板のＩ！！遣方
法である。Furthermore, the present invention provides 12 to 28% by weight of Cr, 1
A Fe-Cr-At stainless steel plate containing ~6% by weight was subjected to surface pretreatment so that the surface roughness expressed in Ra was within the range of 0°2 to 1.0 μm, and the oxygen concentration was 0. 1
% or less at 700 to 1000°C for 10 seconds or more, and then held at 850 to 1000°C in the air for 1 to 4 hours.I! ! It is a method of sending.
作用
本発明に従えば、Ｆ ｅ −Ｃｒ−Ａｔステンレス鋼の
成分を、次のように限定するとともに、下記のような表
面性状を得ることによ−）て、耐食性に浸れ、しかも太
陽光線の放射率を大きくすることなく吸収率を向上させ
ることができるようにした太陽熱選択吸収板が実現され
る。According to the present invention, the components of Fe-Cr-At stainless steel are limited as follows and the surface properties as described below are obtained. A solar heat selective absorption plate that can improve absorption rate without increasing emissivity is realized.
Ｃｒ ：
Ｃｒはステンレス鋼の必須元素であり、１２重ｊｉｔ
％未満では耐食性、耐酸化性がなくなる。またＣｒが２
８重ｋ Ｘを超えると、鋼が脆くなり、放射体に加工で
きなくなるので１２１ｉ ％以上、２８重置火以下に限
定する。Cr: Cr is an essential element of stainless steel, and
If it is less than %, corrosion resistance and oxidation resistance will be lost. Also, Cr is 2
If it exceeds 8 times kX, the steel becomes brittle and cannot be processed into a radiator, so it is limited to 121i% or more and 28 times or less.
Ａｅ：
１．０重Ｉ％未満では高温酸化処理で形成される酸化皮
膜が、Ｆｅ、Ｃｒ酸化物主体となり、アルミナウィスカ
が生成されず、また耐食性がなくなる。ＡＩが多いほど
、本発明の目的を達成することができるが、６．０重量
％を超えると鋼が脆くなり、鋼板の製造が困難となるた
め、１．０重量？６以上、６．０重量％以下に限定する
。Ae: If it is less than 1.0% by weight, the oxide film formed by high-temperature oxidation treatment will consist mainly of Fe and Cr oxides, no alumina whiskers will be generated, and corrosion resistance will be lost. The more AI there is, the more the object of the present invention can be achieved, but if it exceeds 6.0% by weight, the steel becomes brittle and it becomes difficult to manufacture a steel plate. It is limited to 6 or more and 6.0% by weight or less.
この鋼板は、遠赤外線の放射面積を増やすために、表面
粗度を大きくすることが必要であり、その方法として表
面にプラスト・処理を行う、ブラスト処理は粗度ｉｏｏ
〜４００番のアルミナや炭化珪素の砥粒や直径０．０５
〜１．０ｍｍの鉄球や鉄グリッドを投射し、表面粗度を
Ｒａで０．２〜１．０μｍ以上に粗くする０本発明方法
において、ステンレス鋼板の表面粗度を限定した理由は
、０゜２μｍ未満に素調整すると、吸収率が充分に向上
せず、１．０μｍを超えると、吸収率は大きくなるが放
射率も大きくなり、全体の集熱効率が低下するからであ
る。In order to increase the radiation area of far-infrared rays, it is necessary to increase the surface roughness of this steel plate, and the method for this is to perform a blast treatment on the surface.
~400 alumina or silicon carbide abrasive grains or diameter 0.05
The reason why the surface roughness of the stainless steel plate is limited in the method of the present invention is to make the surface roughness Ra 0.2 to 1.0 μm or more by projecting iron balls or iron grids of ~1.0 mm. This is because if the basic adjustment is less than 2 μm, the absorption rate will not be improved sufficiently, and if it exceeds 1.0 μm, the absorption rate will increase, but the emissivity will also increase, and the overall heat collection efficiency will decrease.
次に大気などの酸化性雰囲気中で８５０〜１０００℃で
１〜４時間保持して高温酸化処理を行い、表面に長さ０
．１μｍ、１．０μｍ未満のアルミナウィスカを形成さ
せることにより、太陽光線の放射率を大きくすることな
く、吸収率を向上させてａ熱効率を向上することができ
る。Next, high-temperature oxidation treatment is performed by holding at 850 to 1000°C for 1 to 4 hours in an oxidizing atmosphere such as the air, and the surface has a length of 0.
．． By forming alumina whiskers with a diameter of 1 μm or less than 1.0 μm, it is possible to improve absorption rate and thermal efficiency without increasing the emissivity of sunlight.
この高温酸化処理温度は、８５０℃未満または１０００
℃を超えると、アルミナウィスカが形成されず、酸化皮
膜は平滑なアルミナになり遠赤外線放射特性が得られな
いため、８５０℃以上１０００℃以下に限定する。また
処理時間は１〜４時間とする。１時間未満の酸化処理で
はアルミナウィスカの長さが０．１μｍ以上にならない
ので、１時間以上とする。４時間を超えると、１．０μ
ｍを超えるアルミナウィスカが生じてしまい、放射率が
大きくなり、同様に全体の集熱効率が低下する結果にな
る。This high temperature oxidation treatment temperature is less than 850°C or 1000°C.
When the temperature exceeds 850°C and 1000°C or less, no alumina whiskers are formed and the oxide film becomes smooth alumina, making it impossible to obtain far-infrared radiation characteristics. Further, the treatment time is 1 to 4 hours. If the oxidation treatment is carried out for less than 1 hour, the length of the alumina whiskers will not become 0.1 μm or more, so the oxidation treatment is carried out for 1 hour or more. After 4 hours, 1.0μ
This results in alumina whiskers of more than m, increasing the emissivity and likewise reducing the overall heat collection efficiency.
ただし、鋼板のＡＩ８″有量が３！ｉ量％未満の場きや
、プラスト処理の投射速度が遅く、鋼板表面に充分な加
工歪みを与えられない渇き、高温酸化処理のみではアル
ミナウィスカの長さが短く、密度が低いことがある。こ
のときには予備酸化処理として、酸素濃度０．１％以下
の雰囲気中に７００〜１０００℃で１０秒以上熱処理す
ると、鋼板表面に厚さ１０００人未満の高純度のアルミ
ナ酸化皮膜が形成され、次に上記高温酸化処理を行うと
アルミナウィスカが生成しやすくなる。However, if the AI8'' content of the steel plate is less than 3!i%, or if the blasting speed of the blast treatment is slow and sufficient machining strain cannot be applied to the steel plate surface, high-temperature oxidation treatment alone may result in a long alumina whisker. In this case, heat treatment at 700 to 1000°C for 10 seconds or longer in an atmosphere with an oxygen concentration of 0.1% or less may result in a high density layer with a thickness of less than 1000 mm on the surface of the steel plate. When a high-purity alumina oxide film is formed and then the above-mentioned high-temperature oxidation treatment is performed, alumina whiskers are likely to be generated.
上記予備酸化処理においては、雰囲気中の酸素濃度が０
．１％を超えると酸化皮膜にＦｅやＣｒが混入し、アル
ミナウィスカが形成しなくなるので０ 、１９ｇ以下と
する。また７００℃未満や１０秒間未満では生成酸化皮
膜が薄いので効果がなく、１０００℃を超えると鋼板の
結晶粒が粗大化して脆くなり、加工°することが不可能
となるので７００〜１０００℃で１０秒以上に限定する
。In the above preliminary oxidation treatment, the oxygen concentration in the atmosphere is 0.
．． If it exceeds 1%, Fe and Cr will be mixed into the oxide film and alumina whiskers will not be formed, so the content should be 0.19g or less. In addition, if the temperature is lower than 700℃ or for less than 10 seconds, the oxide film formed is too thin to be effective, and if the temperature exceeds 1000℃, the crystal grains of the steel sheet become coarse and brittle, making it impossible to process. Limited to 10 seconds or more.
本発明に用いるＦ ｅ−Ｃｒ−Ａｌステンレス鋼の成分
ｃ、ｓｔ、ｔ）よびＭ ｎ Ｇｉ、次のように定められ
る。The components c, st, t) and MnGi of the Fe-Cr-Al stainless steel used in the present invention are determined as follows.
Ｃ： Ｃは母材および溶接部の靭性および延性を劣化させる。C: C deteriorates the toughness and ductility of the base metal and weld.
このため本発明の素材を製造する過程で、板切れ、耳割
れ、曲げ割れを生じ、著しく製造性を損なう、そのため
Ｃを０．０３重量％以下に限定する。For this reason, in the process of manufacturing the material of the present invention, plate breakage, edge cracking, and bending cracks occur, which significantly impairs productivity. Therefore, C is limited to 0.03% by weight or less.
Ｓｉ：
Ｓｌは高温の耐酸化性を向上させるが、母材および溶接
部の延性を著しく阻害するので、１．０重量％以下に限
定する。Si: Although Sl improves high-temperature oxidation resistance, it significantly impairs the ductility of the base metal and weld, so it is limited to 1.0% by weight or less.
Ｍｎ：
Ｍｎは母材および溶接部の靭性を劣化させ、かつ高温で
耐酸化性を損なうので、１．０重ＪＩ Ｓ’Ｏ以下に限
定する。Mn: Since Mn deteriorates the toughness of the base metal and weld zone and impairs oxidation resistance at high temperatures, it is limited to 1.0 weight JI S'O or less.
一般にＦｅ−Ｃｒ−Ａｌステンレス鋼にはｆｉ４板の靭
性を高めｗＡ造しやすくするためと、耐酸化性を向上さ
せる目的で０．５重量％までのＴｉ、Ｎｂ、Ｚｒを添加
したり、酸化皮膜の耐剥離性を向上させる目的で０．３
重量％までのＹ、Ｃｅ、Ｌａ、Ｎｄなどの希土類元素を
添加したりするが、これらの元素を添加したＦ ｅ −
Ｃｒ−Ａｌステンレス鋼も本発明に好適である。In general, up to 0.5% by weight of Ti, Nb, and Zr are added to Fe-Cr-Al stainless steel in order to increase the toughness of the FI4 plate and make it easier to manufacture WA, and to improve oxidation resistance. 0.3 for the purpose of improving the peeling resistance of the film.
Rare earth elements such as Y, Ce, La, and Nd may be added up to % by weight, but Fe −
Cr-Al stainless steel is also suitable for the present invention.
実施例
第１表に示すＡ−Ｇの試料のＦ ｅ −Ｃｒ−Ａ／！Ａ
ｌステンレス鋼いて表面前処理および表面処理を行う、
このステンレス鋼の厚さは、１−Ｏｍｒｎとする。Fe-Cr-A/! of samples A-G shown in Example Table 1. A
lStainless steel surface pretreatment and surface treatment,
The thickness of this stainless steel is 1-Omrn.
（以下余白）
第 １
表
第１ｋにおいて、ＲＥ Ｍは希土類元素を示し、ＢＡは
光輝焼鈍を表す、試料Ｇの化学エツチングは、ＨＮｏ、
１０％溶液とＨＦ２％溶液の温き液体浴への浸漬による
。また第１表において、試料Ｇの表面処理において浸漬
とあるのは、クロム酸−硫酸９０℃Ｘ１０ｍ１ｒ皇の浸
漬を示す。(Left below) Table 1 In Table 1k, RE M represents a rare earth element, BA represents bright annealing, and the chemical etching of sample G is HNo,
By immersion in a warm liquid bath of 10% and HF 2% solutions. Furthermore, in Table 1, immersion in the surface treatment of sample G refers to immersion in chromic acid-sulfuric acid at 90°C x 10ml.
こうして得たステンレス鋼の結果は、第２表のとおりで
ある。The results for stainless steel thus obtained are shown in Table 2.
第 ２ 表
試ｆ＋ Ａ −Ｇに対して、日本工業規格ＪＩＳ Ｚ
２３７１塩水噴霧試験を４時間行ったところ、試ｆｉ
Ａ □−，Ｆに対しては全く発錆が見られなかったけれ
ども、試料Ｇの全面には激しい発錆が見られた。Table 2 For test f+A-G, Japanese Industrial Standard JIS Z
When the 2371 salt water spray test was conducted for 4 hours, the test fi
Although no rust was observed on samples A□- and F, severe rust was observed on the entire surface of sample G.
試ｉ１ Ａ −Ｄは、太陽光線の吸収率が良好であり、
か′）放射率が小さく、したがって集熱効率を向上する
ことができる。Trial i1 A-D had good absorption rate of sunlight,
c') The emissivity is low, so the heat collection efficiency can be improved.
図面は、本発明方法における母材であるステンレス鋼板
１の表面の形状の拡大断面図である。アルミナウィスカ
２の長さａおよびそのアルミナウィスカの突部である山
と山との間の距＠ｂを、太陽光線の主な波長０．３〜１
．０μｍ程度の長さにすると、太陽光線の表面上での反
射回数が増加し、吸収率が向上する。一方、熱放射され
る遠赤外線域の長波長に対しては、充分放射率が低下す
る。こうして本発明では、アルミナウィスカ２の長さａ
を前述のように０．１μｍ以上、１．０μｍ未満に選ぶ
、その母材であるステンレス鋼板の表面は、アルミナウ
ィスカ２の皮膜で覆われているので、耐食性が向上され
ることになる。The drawing is an enlarged sectional view of the surface shape of a stainless steel plate 1, which is a base material in the method of the present invention. The length a of the alumina whisker 2 and the distance @b between the peaks of the alumina whisker are 0.3 to 1 at the main wavelength of sunlight.
．． When the length is about 0 μm, the number of reflections of sunlight on the surface increases, and the absorption rate improves. On the other hand, the emissivity is sufficiently reduced for long wavelengths in the far infrared region that are thermally radiated. Thus, in the present invention, the length a of the alumina whisker 2 is
As mentioned above, the surface of the stainless steel plate, which is the base material, is selected to be 0.1 μm or more and less than 1.0 μm, and the surface is covered with a film of alumina whiskers 2, so that corrosion resistance is improved.
発明の効果
以上のように本発明によれば、耐食性に優れ、しかも太
陽熱の放射率を大きくすることなく、吸収率を向上させ
たＦｅ−Ｃｒ−Ａｌステンレス鋼から成る太陽熱選択吸
収板を実現することが可能になり、作業性が向上される
ことになる。Effects of the Invention As described above, according to the present invention, a solar heat selective absorption plate made of Fe-Cr-Al stainless steel that has excellent corrosion resistance and improved absorption rate without increasing solar heat emissivity is realized. This makes it possible to improve work efficiency.
図面は本発明の一実施例の太陽熱選択吸収板の拡大断面
図である。
１・・・ステンレス鋼板、２・・・アルミナウィスカ代
理人 弁理士 西教 圭一部The drawing is an enlarged sectional view of a solar heat selective absorption plate according to an embodiment of the present invention. 1... Stainless steel plate, 2... Alumina whisker Agent Patent attorney Keiichi Saikyo
Claims (3)
するＦｅ−Ｃｒ−Ａｌステンレス鋼板の素地表面をＲａ
で表示して、０．２〜１．０μｍの表面粗度を有し、か
つ、該表面に０．１μｍ以上、１．０μｍ未満の長さの
アルミナウィスカを有することを特徴とする太陽熱選択
吸収板。(1) Ra
A solar heat selective absorption device characterized by having a surface roughness of 0.2 to 1.0 μm, and having alumina whiskers with a length of 0.1 μm or more and less than 1.0 μm on the surface. Board.
するＦｅ−Ｃｒ−Ａｌステンレス鋼板の表面粗度がＲａ
で表示して、０．２〜１．０μｍの範囲内になる如く表
面前処理を施した後、酸化性雰囲気で８５０〜１０００
℃、１〜４時間保持することを特徴とする太陽熱選択吸
収板の製造方法。(2) The surface roughness of the Fe-Cr-Al stainless steel plate containing 12 to 28% by weight of Cr and 1 to 6% by weight of Al is Ra
850 to 1000 in an oxidizing atmosphere
A method for manufacturing a solar heat selective absorption plate, which comprises holding the solar heat selectively absorbing plate at a temperature of 1 to 4 hours.
するＦｅ−Ｃｒ−Ａｌステンレス鋼板の表面粗度がＲａ
で表示して、０．２〜１．０μｍの範囲内になる如く表
面前処理を施した後、酸素濃度０．１％以下の雰囲気で
７００〜１０００℃、１０秒間以上保持後、大気雰囲気
で８５０〜１０００℃、１〜４時間保持することを特徴
とする太陽熱選択吸収板の製造方法。(3) The surface roughness of the Fe-Cr-Al stainless steel plate containing 12 to 28% by weight of Cr and 1 to 6% by weight of Al is Ra
After pre-treating the surface so that it is within the range of 0.2 to 1.0 μm, it is held at 700 to 1000°C for 10 seconds or more in an atmosphere with an oxygen concentration of 0.1% or less, and then in an air atmosphere. A method for manufacturing a solar heat selective absorption board, which comprises maintaining the temperature at 850 to 1000°C for 1 to 4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63196414A JPH0244149A (en) | 1988-08-05 | 1988-08-05 | Solar heat selective absorption plate and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63196414A JPH0244149A (en) | 1988-08-05 | 1988-08-05 | Solar heat selective absorption plate and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0244149A true JPH0244149A (en) | 1990-02-14 |
Family
ID=16357460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63196414A Pending JPH0244149A (en) | 1988-08-05 | 1988-08-05 | Solar heat selective absorption plate and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244149A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0810295A1 (en) * | 1996-05-29 | 1997-12-03 | Sumitomo Metal Industries, Ltd. | Stainless steel for ozone added water and manufacturing method thereof |
| FR2976349A1 (en) * | 2011-06-09 | 2012-12-14 | Commissariat Energie Atomique | METHOD FOR PRODUCING A SOLAR RADIATION ABSORBER ELEMENT FOR A CONCENTRATED THERMAL SOLAR POWER PLANT. |
| JP5344103B1 (en) * | 2011-11-22 | 2013-11-20 | 新日鐵住金株式会社 | Ferritic heat resistant steel and method for producing the same |
-
1988
- 1988-08-05 JP JP63196414A patent/JPH0244149A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0810295A1 (en) * | 1996-05-29 | 1997-12-03 | Sumitomo Metal Industries, Ltd. | Stainless steel for ozone added water and manufacturing method thereof |
| US5944917A (en) * | 1996-05-29 | 1999-08-31 | Sumitomo Metal Industries, Ltd. | Stainless steel for ozone added water and manufacturing method thereof |
| KR100227571B1 (en) * | 1996-05-29 | 1999-11-01 | 고지마 마타오 | Stainless steel for ozone added water and manufacturing method thereof |
| EP1281783A1 (en) * | 1996-05-29 | 2003-02-05 | Sumitomo Metal Industries, Ltd. | Stainless steel for ozone added water and manufacturing method thereof |
| FR2976349A1 (en) * | 2011-06-09 | 2012-12-14 | Commissariat Energie Atomique | METHOD FOR PRODUCING A SOLAR RADIATION ABSORBER ELEMENT FOR A CONCENTRATED THERMAL SOLAR POWER PLANT. |
| WO2012168577A3 (en) * | 2011-06-09 | 2013-03-28 | Commissariat à l'énergie atomique et aux énergies alternatives | Process for producing an element for absorbing solar radiation for a thermal concentrating solar power plant |
| US9551507B2 (en) | 2011-06-09 | 2017-01-24 | Commissariat à l'Energie Atomique et aux Energies Alternatives | Process for producing an element for absorbing solar radiation for a thermal concentrating solar power plant |
| JP5344103B1 (en) * | 2011-11-22 | 2013-11-20 | 新日鐵住金株式会社 | Ferritic heat resistant steel and method for producing the same |
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