JP3876499B2 - Aluminum alloy photoconductor substrate tube - Google Patents
Aluminum alloy photoconductor substrate tube Download PDFInfo
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- JP3876499B2 JP3876499B2 JP30050097A JP30050097A JP3876499B2 JP 3876499 B2 JP3876499 B2 JP 3876499B2 JP 30050097 A JP30050097 A JP 30050097A JP 30050097 A JP30050097 A JP 30050097A JP 3876499 B2 JP3876499 B2 JP 3876499B2
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- 229910000838 Al alloy Inorganic materials 0.000 title claims description 32
- 239000000758 substrate Substances 0.000 title claims description 32
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 description 17
- 238000005260 corrosion Methods 0.000 description 17
- 238000005520 cutting process Methods 0.000 description 14
- 238000000227 grinding Methods 0.000 description 8
- 238000000265 homogenisation Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 108091008695 photoreceptors Proteins 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 1
- 229910019018 Mg 2 Si Inorganic materials 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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- Photoreceptors In Electrophotography (AREA)
Description
【０００１】
【発明の属する技術分野】
この発明は、複写機やプリンタの感光ドラムなどを製造するために使用するアルミニウム合金製感光体基体管に関するものである。
【０００２】
【従来の技術】
一般に、複写機やプリンタの感光ドラムは、ＪＩＳ１０５０、ＪＩＳ３００３、ＪＩＳ６０６３などのアルミニウム合金を溶解し、鋳造してビレットを作製し、このビレットを押出加工した後、引抜加工して素管を製造し、得られた素管の表面を切削および研削などにより鏡面加工して感光体基体管を作製し、感光体基体管の表面を洗浄した後、有機半導体層を塗布したり、セレン皮膜を蒸着させたりすることにより製造されている。
【０００３】
前記ＪＩＳ１０５０アルミニウム合金は表面欠陥が少なく、また耐食性に優れているが軟質材であるために十分な寸法精度が得られず、しかも切削性が劣るために、現在ではＪＩＳ３００３またはＪＩＳ６０６３アルミニウム合金が広く用いられている。
【０００４】
【発明が解決しようとする課題】
ところで、最近では複写機やプリンタの高精細度および高品質化の要求が一層増しており、この様な観点から感光ドラムに使用される材料は、切削性が良好で鏡面仕上げ精度の高いものが要求されている。しかし、前記従来のＪＩＳ３００３またはＪＩＳ６０６３アルミニウム合金では切削および研削加工時にスクラッチ欠陥が発生したり、洗浄時に表面処理ムラまたはピット（腐食孔）などが発生したりする欠点があった。具体的には、１％以上のＭｎを含むＪＩＳ３００３アルミニウム合金には素地中に多量のＡｌ−Ｍｎ−Ｆｅ系金属間化合物が存在するために、切削および研削加工時にスクラッチが発生しやすく、また洗浄時にピット（腐食孔）が発生しやすいという欠点があり、さらに、ＪＩＳ６０６３アルミニウム合金では素地中に多量のβ−ＡｌＦｅＳｉ相があるために切削および研削加工時にスクラッチが発生しやすく、また洗浄時にピット（腐食孔）が発生しやすいという欠点があった。
【０００５】
【課題を解決するための手段】
そこで本発明者らは、切削および研削加工時にスクラッチの発生および洗浄時のピット（腐食孔）の発生のないアルミニウム合金およびその合金からなる感光体基体管を開発すべく研究を行った結果、
従来のＭｇを含有するＪＩＳ６０６３アルミニウム合金に含まれるＭｇ、ＳｉおよびＦｅの含有量を少なくしてＭｇ：０．３〜０．８％、Ｓｉ：０．１〜０．４％、Ｆｅ：０．０２〜０．０４％とし、さらにＭｎ、Ｃｕ、ＴｉおよびＢの含有量を通常のＪＩＳ６０６３アルミニウム合金に含まれる量よりも低く規制し、さらに素地中に分散する単斜晶形のβ−ＡｌＦｅＳｉ相を熱処理により体心立方晶形のα−ＡｌＦｅＳｉ相に変えるなどして素地中に含まれるα−ＡｌＦｅＳｉ相を７０容量％以上にすると、切削および研削加工時にスクラッチの発生および洗浄時のピットの発生が極めて少なくなるという知見を得たのである。
【０００６】
この発明は、かかる知見に基づいて成されたものであって、
（１）重量％で、Ｍｇ：０．３〜０．８％、Ｓｉ：０．１〜０．４％、Ｆｅ：０．０２〜０．０４％含有し、さらにＭｎ：０．０５％以下、Ｃｕ：０．１％以下、Ｔｉ：０．０２％以下、Ｂ：０．００５％以下に規制し、残りがＡｌおよび不可避不純物からなる組成、および素地中に分散する全ＡｌＦｅＳｉ金属間化合物相の内の７０〜１００容量％がα−ＡｌＦｅＳｉ相である組織を有するアルミニウム合金で構成されたアルミニウム合金製感光体基体管、に特徴を有するものである。
【０００７】
前記Ｍｇ：０．３〜０．８％、Ｓｉ：０．１〜０．４％、Ｆｅ：０．０２〜０．０４％含有し、さらにＭｎ：０．０５％以下、Ｃｕ：０．１％以下、Ｔｉ：０．０２％以下、Ｂ：０．００５％以下に規制し、残りがＡｌおよび不可避不純物からなる組成を有するアルミニウム合金の素地中に分散するα−ＡｌＦｅＳｉ相を全ＡｌＦｅＳｉ金属間化合物相の内の７０〜１００容量％を占めるようにするには、温度：５６２℃〜６００℃の範囲内の温度で７〜２４時間保持の均質化処理を施す必要がある。
【０００８】
まず、この発明で使用するアルミニウム合金の成分組成を上述のごとく限定した理由を述べる。
【０００９】
Ｍｇ：
Ｍｇは、アルミニウム合金のマトリックスに固溶し、粗大な晶出物を生成することなく固溶体硬化により強度を高めて切削性を向上させる作用を有するが、０．３％未満では十分な切削性および強度向上効果が得られず、一方、０．８％を越えて含有すると押出性や冷間加工性を低下させるので好ましくない。したがって、Ｍｇ：０．３〜０．８％に定めた。Ｍｇ含有量の一層好ましい範囲は０．４５〜０．６５％である。
【００１０】
Ｓｉ：
Ｓｉは、Ｍｇと結合し、Ｍｇ2 Ｓｉ析出相を生成し、析出効果により強度を高めて加工精度を向上させる作用を有するが、その含有量が０．１％未満では十分な切削性および強度向上効果が得られず、一方、０．４％を越えて含有するとＭｇとの析出物が増加し、またＦｅと結合してβ−ＡｌＦｅＳｉ相を多く晶出して熱処理してもα−ＡｌＦｅＳｉ相に変換されずにβ−ＡｌＦｅＳｉ相のまま残ることが多くなり、そのため切削および研削加工時にスクラッチ欠陥が発生したり、洗浄時に表面処理ムラまたはピット（腐食孔）などが発生したりし、さらに押出性や冷間加工性を低下させるので好ましくない。したがって、Ｓｉ：０．１〜０．４％に定めた。Ｓｉ含有量の一層好ましい範囲は０．２〜０．３％である。
【００１１】
Ｆｅ：
Ｆｅは、Ａｌ合金中に不可避的に含まれており、ＦｅをＡｌ合金から０．０２％未満に低下させることは極めてコストがかかるので好ましくなく、一方、０．０４％を越えて多量に含まれるとβ−ＡｌＦｅＳｉ相を多く晶出して熱処理してもα−ＡｌＦｅＳｉ相に変換されずにβ−ＡｌＦｅＳｉ相のまま残ることが多くなり、切削および研削加工時にスクラッチ欠陥が発生したり、洗浄時に表面処理ムラまたはピット（腐食孔）などが発生させたりするので好ましくない。したがって、Ａｌ合金中に含まれるＦｅの量はＦｅ：０．０２〜０．０４％に定めた。
【００１２】
Ｍｎ：
不純物として不可避的にＭｎが０．０５％を越えて含有すると、Ｆｅ、Ｓｉと結合してＡｌＦｅＳｉＭｎ金属間化合物相を晶出し、このＡｌＦｅＳｉＭｎ金属間化合物相が耐孔食性を低下させるのでＭｎは含有しない方が好ましい。従って、Ｍｎの含有量を０．０５％以下に規制した。０．０４％以下に規制することが一層好ましい。
【００１３】
Ｃｕ：
不純物として不可避的にＣｕが０．１％を越えて含有すると耐孔食性を低下させるのでＣｕは含有しない方が好ましい。従って、Ｃｕの含有量を０．１％以下に規制した。Ｃｕの含有量は０．０５％以下に規制することが一層好ましい。
【００１４】
Ｔｉ：
不純物として不可避的にＴｉが０．０２％を越えて含有すると、粗大な晶出物を生成するのでＴｉは含有しない方が好ましい。しかし、Ｔｉはインゴットの組織を微細化する作用もあるので、Ｔｉの含有量は０．０２％以下に規制した。Ｔｉの含有量は０．０１％以下に規制することが一層好ましい。
【００１５】
Ｂ：
不純物として不可避的にＢが０．００５％を越えて含有すると、粗大な晶出物を生成するのでＢは含有しない方が好ましい。しかし、Ｂはインゴットの組織を微細化する作用もあるので、Ｂの含有量は０．００５％以下に規制した。Ｂの含有量は０．００２％以下に規制することが一層好ましい。
【００１６】
均質化処理条件：
一般に鋳造して得られたアルミニウム合金には、素地中にβ−ＡｌＦｅＳｉ相が分散した組織となることが避けられず、β−ＡｌＦｅＳｉ相は切削および研削加工時にスクラッチ欠陥を発生させ、さらに洗浄時に表面処理ムラを発生させ、さらに洗浄後にピット（腐食孔）などが発生させたりするので感光体基体の材料としては好ましくない。したがって均質化処理によって無害なα−ＡｌＦｅＳｉ相に変換させる必要があるが、温度：５６２℃未満で７時間未満保持する均質化処理条件ではβ−ＡｌＦｅＳｉ相のα−ＡｌＦｅＳｉ相への変換が不十分であるので好ましくなく、一方、温度：６００℃を越えて２４時間を越えて保持すると、β−ＡｌＦｅＳｉ相のα−ＡｌＦｅＳｉ相への変換率がそれほど向上しないにもかかわらず、結晶粒が大きくなり過ぎ、エネルギーのロスも増え、さらに局部溶融が生じるようになるので好ましくない．従って、均質化処理温度：５６２〜６００℃、均質化処理時間が７〜２４時間に定めた。均質化処理温度の一層好ましい範囲は５７０〜５９０℃、均質化処理時間の一層好ましい範囲は７〜１０時間である。
【００１７】
この発明のアルミニウム合金のＭｎ：０．０５％以下、Ｃｕ：０．１％以下、Ｔｉ：０．０２％以下、Ｂ：０．００５％以下に規制するには、不純物の少ない原料を厳選して通常の製造法により製造することができる。
【００１８】
【発明の実施の形態】
表１〜表２に示す成分組成のＡｌ合金Ａ〜Ｊを溶解し、鋳造して直径：２００ｍｍのビレットをそれぞれＤＣ鋳造により製造した。
【００１９】
【表１】
【表２】
表１〜表２に示す成分組成を有するＡｌ合金Ａ〜Ｊのビレットを表３〜表５に示す条件で均質化処理した後、金属顕微鏡観察用試料を作製し、ＨＦ液エッチングによりα−ＡｌＦｅＳｉ相を変色させ、さらに、素地中に分散するα−ＡｌＦｅＳｉ相の量を画像解析装置を用いて測定し、その結果を表３〜表５に示した。
【００２２】
次にこれらＡｌ合金Ａ〜Ｊのビレットを４８０℃の温度で押出加工することにより外径：１００ｍｍ、肉厚：４ｍｍの寸法を有するボートホール管を製造し、このボートホール管をさらに外径：９０ｍｍ、肉厚：３ｍｍになるまで引抜加工することにより本発明アルミニウム合金製感光体基体管（以下、本発明基体管という）１〜６および比較アルミニウム合金製感光体基体管（以下、比較基体管という）１〜７を製造した。なお、比較基体管１〜７はこの発明から外れた構成を含む感光体基体管である。
【００２３】
さらに従来アルミニウム合金製感光体基体管（以下、従来基体管という）をＪＩＳ６０６３アルミニウム合金を使用し、５４０℃で４時間保持の均質化処理したビレットを押出加工および引抜加工することにより製造した。
【００２４】
これら本発明基体管１〜６、比較基体管１〜７および従来基体管について、その表面を鏡面切削し、分断された細かい切粉が発生する場合を切屑分断性（良）、連続した切粉が発生する場合を切屑分断性（否）として切削性の良否を評価し、さらに鏡面切削時にスクラッチ欠陥発生の有無を観察して切削表面仕上り性を評価し、これらの結果を表３〜表５に示した。
【００２５】
さらに、本発明基体管１〜６、比較基体管１〜７および従来基体管の耐食性については塩水噴霧試験（ＪＩＳ−Ｚ２３７１に準ず）を１０００時間行った後、腐食減量を測定し、腐食減量が５０ｍｇ／ｄｍ2 未満を○、５０ｍｇ／ｄｍ2 以上を×として表３〜表５に示し評価した。
【００２６】
さらに、本発明基体管１〜６、比較基体管１〜７および従来基体管の耐孔食性について、湿潤試験（４０℃、相対湿度：９０％以上）を４０時間行った後、ピット発生の有無を測定し、その結果を表３〜表５に示し評価した。
【００２７】
【表３】
【表４】
【表５】
【発明の効果】
表１〜表５に示される結果から、本発明基体管１〜６は、従来基体管に比べて切削性、切削表面仕上り性、耐食性および耐孔食性が優れていることが分かる。また、この発明の範囲から外れた成分組成のアルミニウム合金からなる比較基体管１〜７は切削性、切削表面仕上り性、耐食性および耐孔食性の内の少なくとも１つの特性が劣ることが分かる。
上述のように、この発明は、優れた特性を有するアルミニウム合金製感光体基体管を提供することができるので、優れた特性を有するアルミニウム合金製感光体を製造することができ、産業上優れた効果をもたらすものである。[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoconductor substrate tube made of an aluminum alloy used for manufacturing photoconductor drums of copying machines and printers.
[0002]
[Prior art]
Generally, a photosensitive drum of a copying machine or a printer is manufactured by melting an aluminum alloy such as JIS1050, JIS3003, or JIS6063, casting to produce a billet, extruding the billet, and drawing to produce a raw tube. The surface of the obtained tube is mirror-finished by cutting and grinding to produce a photoconductor substrate tube, and after cleaning the surface of the photoconductor substrate tube, an organic semiconductor layer is applied or a selenium film is deposited. It is manufactured by doing.
[0003]
The JIS 1050 aluminum alloy has few surface defects and is excellent in corrosion resistance, but since it is a soft material, sufficient dimensional accuracy cannot be obtained, and since machinability is poor, JIS 3003 or JIS 6063 aluminum alloy is widely used at present. It has been.
[0004]
[Problems to be solved by the invention]
Recently, demands for higher definition and higher quality of copiers and printers are increasing. From this point of view, materials used for photosensitive drums have good machinability and high mirror finish accuracy. It is requested. However, the conventional JIS3003 or JIS6063 aluminum alloy has drawbacks that scratch defects occur during cutting and grinding, and surface treatment unevenness or pits (corrosion holes) occur during cleaning. Specifically, JIS3003 aluminum alloy containing 1% or more of Mn contains a large amount of Al-Mn-Fe intermetallic compound in the substrate, so that scratches are likely to occur during cutting and grinding, and cleaning. Sometimes pits (corrosion holes) are likely to occur, and in addition, JIS6063 aluminum alloy has a large amount of β-AlFeSi phase in the substrate, so that scratches are likely to occur during cutting and grinding, and pits ( There was a drawback that corrosion holes) were likely to occur.
[0005]
[Means for Solving the Problems]
Therefore, the present inventors conducted research to develop an aluminum alloy that does not generate scratches and pits (corrosion holes) during cutting and grinding, and a photosensitive substrate tube made of the alloy,
By reducing the contents of Mg, Si and Fe contained in a conventional JIS6063 aluminum alloy containing Mg, Mg: 0.3 to 0.8%, Si: 0.1 to 0.4%, Fe: 0.0. The content of Mn, Cu, Ti and B is regulated to be lower than that contained in a normal JIS6063 aluminum alloy, and a monoclinic β-AlFeSi phase dispersed in the substrate is further added. If the α-AlFeSi phase contained in the substrate is increased to 70% by volume or more by changing to a body-centered cubic α-AlFeSi phase by heat treatment, scratches and pits during cleaning are extremely generated during cutting and grinding. I got the knowledge that it would be less.
[0006]
This invention is made based on such knowledge,
(1) By weight, Mg: 0.3 to 0.8%, Si: 0.1 to 0.4%, Fe: 0.02 to 0.04 %, and Mn: 0.05% or less Cu: 0.1% or less, Ti: 0.02% or less, B: 0.005% or less, the composition comprising the rest of Al and inevitable impurities, and the total AlFeSi intermetallic phase dispersed in the substrate Of these, the aluminum alloy photosensitive substrate tube is made of an aluminum alloy having a structure in which 70 to 100% by volume is an α-AlFeSi phase.
[0007]
Mg: 0.3 to 0.8%, Si: 0.1 to 0.4%, Fe: 0.02 to 0.04 %, Mn: 0.05% or less, Cu: 0.1 %-, Ti: 0.02% or less, B: 0.005% or less, and the remainder of the α-AlFeSi phase dispersed in the base material of the aluminum alloy having a composition comprising Al and inevitable impurities between all AlFeSi metals In order to occupy 70 to 100% by volume of the compound phase, it is necessary to perform a homogenization treatment of holding for 7 to 24 hours at a temperature in the range of 562 ° C. to 600 ° C.
[0008]
First, the reason why the component composition of the aluminum alloy used in the present invention is limited as described above will be described.
[0009]
Mg:
Mg dissolves in the matrix of the aluminum alloy and has the effect of improving the machinability by increasing the strength by solid solution hardening without generating coarse crystallized material. However, if less than 0.3%, sufficient machinability and On the other hand, if the content exceeds 0.8%, the extrudability and the cold workability are deteriorated, which is not preferable. Therefore, Mg was set to 0.3 to 0.8%. A more preferable range of the Mg content is 0.45 to 0.65%.
[0010]
Si:
Si combines with Mg to form a Mg 2 Si precipitate phase, and has the effect of increasing the strength by the precipitation effect to improve the processing accuracy, but if its content is less than 0.1%, sufficient machinability and strength On the other hand, when the content exceeds 0.4%, precipitates with Mg increase, and even when α-AlFeSi phase is bonded to Fe and a large amount of β-AlFeSi phase is crystallized and heat-treated. In many cases, the β-AlFeSi phase remains without being converted to, so that scratch defects occur during cutting and grinding, uneven surface treatment or pits (corrosion holes) occur during cleaning, and extrusion. This is not preferable because it decreases the workability and cold workability. Therefore, it was set to Si: 0.1 to 0.4%. A more preferable range of the Si content is 0.2 to 0.3%.
[0011]
Fe:
Fe is inevitably contained in the Al alloy, and it is not preferable to reduce Fe from the Al alloy to less than 0.02% because it is very expensive. On the other hand, it is contained in a large amount exceeding 0.04 %. In this case, a large amount of β-AlFeSi phase is crystallized, and even after heat treatment, the β-AlFeSi phase often remains as it is without being converted to the α-AlFeSi phase. It is not preferable because surface treatment unevenness or pits (corrosion holes) are generated. Therefore, the amount of Fe contained in the Al alloy is set to Fe: 0.02 to 0.04 %.
[0012]
Mn:
If Mn is inevitably contained as an impurity and exceeds 0.05%, it combines with Fe and Si to crystallize an AlFeSiMn intermetallic compound phase, and this AlFeSiMn intermetallic compound phase reduces pitting corrosion resistance, so Mn is contained. It is preferable not to. Therefore, the Mn content is regulated to 0.05% or less. It is more preferable to restrict the content to 0.04% or less.
[0013]
Cu:
If Cu is inevitably contained as an impurity in excess of 0.1%, the pitting corrosion resistance is lowered, so it is preferable not to contain Cu. Therefore, the Cu content is regulated to 0.1% or less. More preferably, the Cu content is limited to 0.05% or less.
[0014]
Ti:
If Ti is inevitably contained as an impurity in an amount exceeding 0.02%, a coarse crystallized product is generated, so it is preferable not to contain Ti. However, since Ti also has the effect of refining the ingot structure, the Ti content is regulated to 0.02% or less. More preferably, the Ti content is regulated to 0.01% or less.
[0015]
B:
If B is inevitably contained as an impurity and exceeds 0.005%, a coarse crystallized product is formed, so it is preferable not to contain B. However, since B also has the effect of refining the ingot structure, the B content is regulated to 0.005% or less. More preferably, the B content is regulated to 0.002% or less.
[0016]
Homogenization treatment conditions:
In general, an aluminum alloy obtained by casting has an unavoidable structure in which a β-AlFeSi phase is dispersed in the substrate. The β-AlFeSi phase generates scratch defects during cutting and grinding, and further during cleaning. Unevenness of the surface treatment is generated, and pits (corrosion holes) are generated after cleaning, which is not preferable as a material for the photoreceptor substrate. Therefore, it is necessary to convert to a harmless α-AlFeSi phase by homogenization treatment, but the conversion from β-AlFeSi phase to α-AlFeSi phase is insufficient under the homogenization treatment conditions of temperature: maintained at less than 562 ° C. for less than 7 hours. On the other hand, if the temperature is maintained at over 600 ° C. for more than 24 hours, the conversion rate of the β-AlFeSi phase to the α-AlFeSi phase does not improve so much, but the crystal grains become large. This is not preferable because energy loss increases and local melting occurs. Therefore, the homogenization treatment temperature was set to 562 to 600 ° C., and the homogenization treatment time was set to 7 to 24 hours. A more preferable range of the homogenization treatment temperature is 570 to 590 ° C., and a more preferable range of the homogenization treatment time is 7 to 10 hours.
[0017]
To control the aluminum alloy of the present invention to Mn: 0.05% or less, Cu: 0.1% or less, Ti: 0.02% or less, B: 0.005% or less, carefully select raw materials with few impurities. And can be produced by an ordinary production method.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Al alloys A to J having the composition shown in Tables 1 and 2 were melted and cast to produce billets having a diameter of 200 mm by DC casting.
[0019]
[Table 1]
[Table 2]
After homogenizing the billets of Al alloys A to J having the component compositions shown in Tables 1 and 2 under the conditions shown in Tables 3 to 5, samples for observation with a metal microscope were prepared and α-AlFeSi was etched by HF liquid etching. The amount of the α-AlFeSi phase dispersed in the substrate was measured using an image analyzer, and the results are shown in Tables 3 to 5.
[0022]
Next, the billet of these Al alloys A to J is extruded at a temperature of 480 ° C. to produce a boat hole tube having an outer diameter of 100 mm and a wall thickness of 4 mm. The aluminum alloy photoreceptor substrate tube (hereinafter referred to as the present invention substrate tube) 1 to 6 and comparative aluminum alloy photoreceptor substrate tube (hereinafter referred to as the comparison substrate tube) are drawn by drawing until the thickness is 90 mm and 3 mm. 1) to 7 were produced. The comparative substrate tubes 1 to 7 are photoconductor substrate tubes including a configuration deviating from the present invention.
[0023]
Further, a conventional aluminum alloy photosensitive substrate tube (hereinafter referred to as a conventional substrate tube) was manufactured by using JIS6063 aluminum alloy and extruding and drawing a billet that had been homogenized at 540 ° C. for 4 hours.
[0024]
For these substrate tubes 1-6, comparative substrate tubes 1-7, and conventional substrate tubes, the surface is mirror-cut to produce fine chips that are cut off. When cutting occurs, the cutting ability is evaluated as chip separation (not), and further, the surface finish is evaluated by observing the presence or absence of scratch defects during mirror cutting, and the results are shown in Tables 3 to 5 below. It was shown to.
[0025]
Further, regarding the corrosion resistance of the present invention base tubes 1 to 6, comparative base tubes 1 to 7 and conventional base tubes, after performing a salt spray test (according to JIS-Z2371) for 1000 hours, the corrosion weight loss was measured. less than 50mg / dm 2 ○, and evaluated are shown in tables 3 to 5 as × a 50 mg / dm 2 or more.
[0026]
Further, regarding the pitting corrosion resistance of the substrate tubes 1 to 6 of the present invention, the comparative substrate tubes 1 to 7 and the conventional substrate tube, the presence or absence of pit generation after 40 hours of a wet test (40 ° C., relative humidity: 90% or more) The results were shown in Tables 3 to 5 and evaluated.
[0027]
[Table 3]
[Table 4]
[Table 5]
【The invention's effect】
From the results shown in Tables 1 to 5, it can be seen that the substrate pipes 1 to 6 of the present invention are superior in machinability, cutting surface finish, corrosion resistance, and pitting corrosion resistance as compared with the conventional base tube. Further, it can be seen that the comparative base tubes 1 to 7 made of an aluminum alloy having a component composition outside the scope of the present invention are inferior in at least one of cutting properties, cutting surface finish properties, corrosion resistance and pitting corrosion resistance.
As described above, the present invention can provide an aluminum alloy photoconductor substrate tube having excellent characteristics. Therefore, an aluminum alloy photoconductor having excellent characteristics can be manufactured, which is industrially excellent. It has an effect.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30050097A JP3876499B2 (en) | 1997-10-31 | 1997-10-31 | Aluminum alloy photoconductor substrate tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30050097A JP3876499B2 (en) | 1997-10-31 | 1997-10-31 | Aluminum alloy photoconductor substrate tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11131168A JPH11131168A (en) | 1999-05-18 |
| JP3876499B2 true JP3876499B2 (en) | 2007-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30050097A Expired - Fee Related JP3876499B2 (en) | 1997-10-31 | 1997-10-31 | Aluminum alloy photoconductor substrate tube |
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| CN103031469B (en) * | 2012-11-11 | 2015-04-22 | 马鞍山市新马精密铝业股份有限公司 | Aluminum tube with excellent surface quality for photosensitive drum and manufacturing method thereof |
| JP6961395B2 (en) * | 2017-06-07 | 2021-11-05 | 株式会社Uacj | Aluminum alloy port hole Extruded pipe shape Hollow shape and heat exchanger piping material |
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| JPH11131168A (en) | 1999-05-18 |
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