1. A coated steel strip product, comprising:
a steel strip substrate; and
a dense and hard abrasion resistant coating on one side or both sides of said strip substrate,
wherein the coating is directly applied on the strip substrate, a thickness of the coating is in total maximally 25 \u03bcm, a ratio between the thickness of the coating and a thickness of the strip substrate is 0.001 to 7%, a hardness of the coating is at least 600 HV and a tensile strength of the steel strip substrate is at least 1200 MPa.
2. The product according to claim 1, wherein the thickness of the strip substrate is between 0.015 mm and 5.0 mm.
3. The product according to claim 1, wherein the strip substrate is made of hardenable carbon steel, hardenable stainless chromium steel, or precipitation hardenable strip steel.
4. The product according to claim 1, wherein the coating is substantially made of Al2O3.
5. The product according to claim 1, wherein the coating is a mixture of Al2O3 and one or more of TiO2 and ZrO2, the mixture having a main ingredient of Al2O3.
6. The product according to claim 1, wherein the coating is a metallic coating comprising Cr.
7. The product according to claim 6, wherein the metallic coating consists essentially of Cr.
8. A product according to claim 1, wherein the coating includes transition metal carbides, transition metal nitrides or mixtures thereof.
9. The product according to claim 8, wherein the coating includes TiN, TiC, CrN, or mixtures thereof.
10. The product according to claim 1, wherein the ratio between the thickness of the coating and the thickness of the strip substrate is 0.01 to 7%.
11. The product according to claim 10, wherein the ratio is 0.01 to 5%.
12. The product according to claim 1, wherein the coating has a multi-layer structure of up to 10 layers.
13. The product according to claim 12, wherein each individual layer of the multi-layer structure has a thickness of between 0.1 to 15 \u03bcm.
14. The product according to claim 13, wherein the individual layers include oxides in the form of Al2O3, TiO2 or ZrO2, or mixtures thereof.
15. The product of claim 14, wherein individual layers include nitrides or carbides.
16. The product of claim 15, wherein the nitrides include TiN and the carbides include TiC.
17. The product of claim 15, wherein individual layers of the multi-layer structure include a metallic coating.
18. The product of claim 17, wherein the metallic coating consists essentially of Cr.
19. The product of claim 14, wherein individual layers of the multi-layer structure include a metallic coating.
20. The product of claim 19, wherein the metallic coating consists essentially of Cr.
21. The product according to claim 14, comprising at least one layer of nickel having a thickness up to 2 \u03bcm, the at least one layer not adjacent the strip substrate.
22. A shaving product, including the coated steel strip product as in any one of claims 1, 5, 12 and 21.
23. The shaving product of claim 22, wherein the shaving product is a razor blade.
24. A knife including the coated steel strip product as in any one of claims 1, 5, 12 and 21.
25. The knife of claim 24, wherein the knife is a utility knife, an industrial knife, or a surgical knife.
26. A saw including the coated steel strip product as in any one of claims 1, 5, 12 and 21.
27. The saw according to claim 26, wherein the saw is a hand saw or an industrial saw.
28. A method of manufacturing a coated steel strip product, the coated steel strip product having a steel strip substrate and a dense and hard abrasion resistant coating on one side or both sides of said strip substrate, wherein the coating is directly applied on the strip substrate, a thickness of the coating is in total maximally 25 \u03bcm, a ratio between the thickness of the coating and a thickness of the strip substrate is 0.001 to 7%, a hardness of the coating is at least 600 HV and a tensile strength of the steel strip substrate is at least 1200 MPa, the method comprising:
operating a strip production line in a continuous roll-to-roll process at a feed rate of at least 2.5 mmin to feed the strip substrate;
removing a thin oxide layer from the strip substrate by ion assisted etching in an etch chamber to form a cleaned strip substrate; and
depositing the coating directly on the cleaned strip substrate by electron beam evaporation in an electron beam deposition chamber,
wherein both the etch chamber and the electron beam deposition chamber are integrated into the continuous roll-to-roll process.
29. The method according to claim 28, comprising forming the coated strip substrate into a final dimension by slitting or edge treatment.
30. The method according to claim 29, wherein the coating is a multi-layer coating and the method comprises forming the multi-layer coating by a plurality of depositions by electron beam evaporation.
31. The method according to claim 28, wherein depositing by electron beam evaporation is plasma activated.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A hydraulic circuit cleaning apparatus coupled to a hydraulic circuit, comprising:
an oil pump,
an oil passage to which oil ejected from the oil pump is supplied, and
a pressure regulator device that is disposed in the oil passage and that regulates the pressure of the oil in the oil passage, the pressure regulator device having a discharge port for discharging oil to the oil passage,
a discharge passage that is connected to the discharge port and that is adapted to discharge a cleaning liquid out of the hydraulic circuit.
2. A cleaning apparatus according to claim 1, further comprising a lid member that closes the discharge passage.
3. A cleaning apparatus according to claim 2, wherein the discharge passage is closed by the lid member after the cleaning liquid flows through the hydraulic circuit and is discharged from the discharge passage.
4. A cleaning apparatus according to claim 1,
wherein the oil pump has a suction opening,
wherein the discharge port of the pressure regulator device is connected to the suction opening of the oil pump, and
wherein the discharge passage is provided in a path from the discharge port to the suction opening of the oil pump.
5. A cleaning apparatus according to claim 1, wherein the pressure regulator device is adapted to connect the oil passage and the discharge passage in communication when a pressure in the oil passage is at least a predetermined pressure.
6. A hydraulic circuit cleaning apparatus in a hydraulic circuit comprising:
a oil pump having an ejection opening for ejecting oil and a suction opening for sucking oil;
a circulating oil passage that is connected to the ejection opening and to the suction opening;
a pressure regulator device that is disposed in the circulating oil passage and that regulates at least the pressure of the oil at an ejection side of the oil pump; and
a discharge passage that is connected between the pressure regulator device in circulating oil passage and the suction opening of the oil pump and that is adapted to discharge the cleaning liquid.
7. A cleaning apparatus according to claim 6, further comprising a sealing member that closes the discharge passage.
8. A cleaning apparatus according to claim 7, further comprising a filtering device that filters an oil sucked into the suction opening of the oil pump,
wherein the sealing member is a plug that is inserted into the discharge passage to close the discharge passage, and
wherein the filtering device is constructed so as to prevent the plug from falling from the discharge passage.
9. A cleaning method for cleaning a hydraulic circuit including an oil pump that sucks oil via a suction port and that ejecting the oil to a passage via an ejection port, a pressure regulator device that is connected to the ejection port and that regulates the oil pressure in the passage, the pressure regulator device having a discharge port for discharging the pressure regulated oil, and an oil passage connecting the suction port of the oil pump and the discharge port of the pressure regulator device, the cleaning method comprising:
injecting a cleaning liquid into the hydraulic circuit;
supplying the cleaning liquid to the pressure regulator device via the oil pump; and
discharging the cleaning liquid from the oil passage.
10. A transmission that controls a speed shift via an oilamount, comprising:
a speed changing mechanism that performs the speed shift upon being supplied with an oil from an oil passage for changing between at least two speed shift clutches; and
a hydraulic circuit cleaning apparatus comprising a discharge passage that is connected to a discharge port of a pressure regulator device and that is adapted to discharge a cleaning liquid out of the hydraulic circuit; and
a controller that controls an oil amount supplied to the speed changing mechanism via the hydraulic circuit.