Cylindrical support for electrophotographic photoreceptor, electrophotographic photoreceptor, process cartridge, and image forming apparatus
A cylindrical support for an electrophotographic photoreceptor includes an aluminum alloy including Si: 0.4% by weight to 0.8% by weight, Fe: 0.7% by weight or less, Cu: 0.15% by weight to 0.4% by weight, Mn: 0.15% by weight or less, Mg: 0.8% by weight to 1.2% by weight, Cr: 0.04% by weight to 0.35% by weight, Zn: 0.25% by weight or less, Ti: 0.15% by weight or less, and a balance: aluminum and impurities, wherein an average area of crystal grains of the aluminum alloy is from 3.0 μm 2 to 100 μm 2 .
1. A cylindrical support for an electrophotographic photoreceptor comprising:
an aluminum alloy consisting essentially of
Si: 0.4% by weight to 0.8% by weight,
Fe: 0.7% by weight or less,
Cu: 0.15% by weight to 0.4% by weight,
Mn: 0.15% by weight or less,
Mg: 0.8% by weight to 1.2% by weight,
Cr: 0.04% by weight to 0.35% by weight,
Zn: 0.25% by weight or less,
Ti: 0.15% by weight or less, and
a balance: aluminum and impurities,
wherein an average area of crystal grains of the aluminum alloy is from 3.0 μm 2 to 100 μm 2 .
2. The cylindrical support for an electrophotographic photoreceptor according to claim 1 , which is prepared by:
performing cold impact pressing on the aluminum alloy to obtain a molded product,
performing solution treatment on the molded product obtained in the cold impact pressing,
performing shape machining on the solution-treated molded product, and
performing age-hardening treatment on the shape-machined molded product.
3. The cylindrical support for an electrophotographic photoreceptor according to claim 1 , wherein the cylindrical support for an electrophotographic photoreceptor has a thickness of from 0.03 mm to 1.5 mm.
4. The cylindrical support for an electrophotographic photoreceptor according to claim 1 , wherein the cylindrical support for an electrophotographic photoreceptor has a thickness of from 0.1 mm to 0.9 mm.
5. The cylindrical support for an electrophotographic photoreceptor according to claim 1 , wherein the cylindrical support for an electrophotographic photoreceptor has a thickness of from 0.2 mm to 0.8 mm.
6. The cylindrical support for an electrophotographic photoreceptor according to claim 1 , wherein the average area of crystal grains is from 5.0 μm 2 to 80 μm 2 .
7. The cylindrical support for an electrophotographic photoreceptor according to claim 1 , wherein the average area of crystal grains is from 7.0 μm 2 to 70 μm 2 .
8. An electrophotographic photoreceptor comprising:
the cylindrical support for an electrophotographic photoreceptor according to claim 1 ; and
a photosensitive layer that is provided on the cylindrical support for an electrophotographic photoreceptor.
9. A process cartridge, which is detachable from an image forming apparatus and comprises the electrophotographic photoreceptor according to claim 8 .
10. An image forming apparatus comprising:
the electrophotographic photoreceptor according to claim 8 ;
a charging unit that charges a surface of the electrophotographic photoreceptor;
an electrostatic latent image forming unit that forms an electrostatic latent image on the surface of the charged electrophotographic photoreceptor;
a developing unit that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by a developer including a toner to form a toner image; and
a transfer unit that transfers the toner image onto a surface of a recording medium.