摘要:
An object of the present invention is to enable a reduction in weight and improve reliability. A rotary compressor (101) has a cylinder (24), a piston (21), and a bushing (22). The cylinder (24) includes a cylinder hole (24a). The piston (21) moves relative to the cylinder (24) in the cylinder hole (24a). The bushing (22) slides against the cylinder (24) and the piston (21) in the cylinder hole (24a). The cylinder (24) and the piston (21) are formed from an Al-Si alloy having a Si content exceeding 12.6 wt%, which is a eutectic point. The bushing (22), which is formed from steel, has a surface layer including a sliding surface (22a) that slides against the cylinder (24) and the piston (21). The surface layer is reformed so as to have greater hardness than hardness of proeutectic Si contained in the Al-Si alloy. The surface layer also has hardness of at least Hv 1000 in the sliding surface.
摘要:
An object of the present invention is to enable a reduction in weight and improve reliability. A rotary compressor (101) has a cylinder (24), a piston (21), and a bushing (22). The cylinder (24) includes a cylinder hole (24a). The piston (21) moves relative to the cylinder (24) in the cylinder hole (24a). The bushing (22) slides against the cylinder (24) and the piston (21) in the cylinder hole (24a). The cylinder (24) and the piston (21) are formed from an Al-Si alloy having a Si content exceeding 12.6 wt%, which is a eutectic point. The bushing (22), which is formed from steel, has a surface layer including a sliding surface (22a) that slides against the cylinder (24) and the piston (21). The surface layer is reformed so as to have greater hardness than hardness of proeutectic Si contained in the Al-Si alloy. The surface layer also has hardness of at least Hv 1000 in the sliding surface.
摘要:
In a cross-cut test, after cuts (12) are vertically and horizontally formed in a coating film (11) applied to a base material (10) to make a peeling force act on the coating film (11), adhesion of the coating film (11) is evaluated based on a peeling state of the coating film (11). In the cross-cut test, first vertical cuts (12a) are formed at regular or irregular intervals, and intervals between second horizontal cuts (12b) are gradually narrowed, in order to quantitatively measure the adhesion of the coating film (11) to the base material (10), and to reduce complicated working processes.
摘要:
An object is to provide a sliding member having reduced mechanical loss due to a smaller slider and possessing high reliability due to improved durability, and to provide a fluidic machine that uses the sliding member. The sliding member (1) has a porous sintered base (2) and a resin composition (3). The porous sintered base (2) is made of a porous sintered compact. The resin composition (3) is coated onto the surface of the porous sintered base (2). The resin layer thickness t1 is obtained by adding 10 µm or more to the pore depth t2. The resin layer thickness t1 is the thickness of the resin composition (3). The pore depth t2 is the depth of the pores (6) exposed on the surface of the porous sintered base (2).