WO2003104512A1 - 被膜の材料選定方法及び被膜 - Google Patents
被膜の材料選定方法及び被膜 Download PDFInfo
- Publication number
- WO2003104512A1 WO2003104512A1 PCT/JP2003/007199 JP0307199W WO03104512A1 WO 2003104512 A1 WO2003104512 A1 WO 2003104512A1 JP 0307199 W JP0307199 W JP 0307199W WO 03104512 A1 WO03104512 A1 WO 03104512A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coating
- selecting
- area ratio
- impeller
- metal
- Prior art date
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 130
- 239000011248 coating agent Substances 0.000 title claims abstract description 126
- 239000000463 material Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000003628 erosive effect Effects 0.000 claims abstract description 60
- 239000002002 slurry Substances 0.000 claims abstract description 40
- 239000000919 ceramic Substances 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000007751 thermal spraying Methods 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 11
- 229910044991 metal oxide Inorganic materials 0.000 claims description 8
- 150000004706 metal oxides Chemical class 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000011800 void material Substances 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 51
- 239000000758 substrate Substances 0.000 abstract description 8
- 238000011156 evaluation Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 239000000203 mixture Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010187 selection method Methods 0.000 description 3
- -1 chromium carbides Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
Definitions
- the present invention relates to an erosion-resistant coating and a method of selecting a material thereof.
- the present invention relates to a coating selected by the method, and further relates to an impeller coated with such a coating and a fluid machine having the impeller.
- a rotating member such as a runner operating in the fluid, ie, an impeller, or a component that forms a fluid flow path is in contact with the fluid.
- a material having excellent slurry erosion resistance In order to prevent surface wear, it is necessary to use a material having excellent slurry erosion resistance.
- a material having excellent resistance to slurry erosion is not only expensive, but also has a problem of lacking other mechanical strength when used alone. Usually, performance, cost, repair, etc. are considered.
- a hard sprayed coating is welded to a desired thickness on the surface of the base material constituting the constituent member, and such a base material is protected from abrasion.
- a cermet material which is a composite material of ceramic and metal, has been used in many cases.
- an object of the present invention is to clarify the influencing factors relating to the material affecting the slurry erosion resistance and the influencing factors relating to the material affecting the cavitation erosion resistance, and to provide an erosion resistant coating. It is to provide a rational material selection method.
- Another object of the present invention is to use the area ratio of ceramic particles or the hardness of the coating on the surface of the coating for the slurry erosion resistance, and the porosity per unit area of the coating surface for the resistance to cavitation erosion.
- the purpose of the present invention is to provide a method for selecting a coating material to be evaluated by using the total perimeter or the void area ratio.
- Another object of the present invention is to provide a coating for a thermal spraying method, which is composed of a material selected by the above selection method.
- Still another object of the present invention is to provide an impeller covered with the above-mentioned coating and a fluid machine having such an impeller.
- a method for selecting a coating material containing a ceramic and a metal for coating a substrate surface using a thermal spraying method wherein a material factor affecting only the slurry erosion resistance is provided.
- a method for selecting a coating material characterized by independently evaluating and selecting material factors that affect only the erosion resistance.
- the area ratio of ceramic particles on the coating surface is used for the slurry erosion resistance.
- the mouth area may be evaluated by using the total perimeter of pores (average diameter of 111 or more) per unit area of the coating surface.
- the pickling hardness of the coating surface is used for the slurry erosion resistance, and the porosity per unit area of the coating surface is used for the erosion resistance. The evaluation may be made using the total perimeter (average diameter 1 m or more).
- the area ratio of ceramic particles on the surface of the coating is used for the resistance to slurry erosion, and the area ratio of vacancies on the surface of the coating is used for the resistance to cavitation erosion. May be evaluated.
- the coating hardness of the coating surface is used for the slurry erosion resistance, and the coating surface resistance is used for the resistance of the coating erosion. The evaluation may be performed using the void area ratio.
- a coating comprising ceramic particles containing at least one of a metal carbide and a metal oxide, and a metal, wherein the area ratio of the ceramic particles on the coating surface is 25 to 50%. And a total perimeter of pores (average diameter or more) per unit area on the surface of the coating is 600 000 mZmm 2 or less.
- a coating comprising ceramic particles containing at least one of a metal carbide and a metal oxide, and a metal, wherein the coating has a surface hardness of 900 kg Zmm 2 or more. , and the and the coating having a peripheral length total 6 0 0 0 0 z mZmm 2 characterized in that the point or less of pores per unit area of the coating surface (flat Hitoshi ⁇ l ⁇ or m) is provided.
- a coating comprising ceramic particles containing at least one of a metal carbide and a metal oxide, and a metal, wherein the area ratio of the ceramic particles on the coating surface is 25 to 50%. And a coating characterized in that the porosity of the coating surface is 3% or less.
- a coating composed of ceramic particles containing at least one of a metal carbide and a metal oxide, and a metal, having a Vickers hardness of 900 kg Zmm 2 or more on the surface of the coating and porosity on the coating surface.
- a coating is provided which is characterized in that the area ratio is 3% or less.
- an impeller provided with a hub and a plurality of blades attached circumferentially around the hub, wherein at least a part of the surface of the impeller has the coating. Is provided by the thermal spraying method.
- an impeller provided with a plurality of wings, a plurality of wings circumferentially mounted around the hub, and a chamber for rotatably housing the impeller
- a fluid machine comprising: a casing defining a coating defined by a thermal spraying method on at least a part of a surface of the impeller.
- FIG. 1 is a perspective view of a test piece for a slurry erosion test and a substrate for the test piece.
- FIG. 2 is a schematic configuration diagram of a test apparatus used in the present embodiment for evaluating the resistance to slurry erosion.
- FIG. 3 is a graph showing the test results.
- FIG. 4 is a graph showing the test results.
- FIG. 5 is a perspective view of a test piece for a cavitation erosion test and a substrate for the test piece.
- FIG. 6 is a schematic configuration diagram of a test apparatus used in the present example for evaluating the resistance to cavitation erosion.
- FIG. 7 is a plan view of a part of the rotating body of the device shown in FIG.
- FIG. 8 is a graph showing the test results.
- FIG. 9 is a graph showing the test results.
- FIG. 10 is a cross-sectional view showing an example of an impeller on which the coating of the present invention is formed.
- FIG. 11 is a cross-sectional view of a pump including the impeller of FIG.
- a plurality of (22 in this test example) test pieces on which the coatings were formed in this manner were each set in a test apparatus 10 schematically illustrated in FIG. 2 to perform a test.
- 11 is a test tank defining a chamber
- 13 is rotatably supported in the test tank 11
- one surface (the left side in FIG. 2) has test pieces 3a, 3 b, 3 c, a rotating body that can be detachably attached
- 14 rotates a rotating body 13
- Electric motors, 15 and 16 are pressure gauges and thermometers attached to the test tank 11
- 17 is a slurry tank
- 18 is the slurry in the slurry tank 17 through the conduit 19 in the chamber 12 Is a slurry pump that feeds water into conduit 19 via conduit 21.
- 23 a to 23 e are on-off valves connected to the conduits, 24 are on-off valves connected to the discharge pipe 25, 26 are the water that extends through the inside of the slurry tank 17 and the water is inside the slurry tank. Is a heat exchange tube for cooling.
- the test tank and the test piece mounting surface of the Z or the rotating plate are formed so that the slurry strikes the surface of the test piece at a desired angle when the rotating disk 13 is rotating.
- test pieces 3a, 3b, and 3c were attached to one side (the left side in FIG. 2) of the rotating disk 14, and the motor 1 This was carried out by a method of rotating by 4.
- the pressure in the test tank was adjusted to 0.1 M Pa, and the temperature was adjusted to 25 to 30 ° C.
- the experiment conditions were based on the actual river turbid water conditions, and the rotation speed of the rotating disk was adjusted so that the slurry collision speed was 55 m / s, and the sediment concentration in the slurry was 1 wt.%.
- An experiment under such conditions was carried out on each of the test pieces on which the hard coating was formed, and the wear rate was determined. The results are shown in graphs in Figs. 3 and 4.
- Figure 3 shows the relationship between the area ratio of the ceramic hard particles in the coating and the wear rate
- Figure 4 shows the relationship between the hardness of the hard coating and the wear rate.
- the experiment was performed with the area ratio of ceramic particles, which are hard particles, in the range of 5 to 50%.
- the reason for this is that if the area ratio exceeds 50%, the adhesive strength of the coating to the substrate is reduced, and the coating frequently cracks, so that it is practically meaningless.
- the area ratio of the ceramic hard particles is preferably 25% to 5%.
- the coating in the range of 0%, the slurry erosion resistance of the pump member can be improved. More preferably, a coating in the range of 30% to 40% is formed.
- the Pickers hardness of the hard coating surface of the coating is Focusing on the degree (measurement load 500 g), when the value is less than 900 kg / mm 2, the wear rate decreases as the hardness of the picks increases, but when it exceeds approximately 900 kg / mm 2 , the wear rate decreases. It can be seen that the speed is substantially constant. Thus, it can be seen that the ceramic hard particle area ratio and the hard coating hardness each affect only the slurry erosion resistance.
- the cavitation erosion test was performed according to the rotating disk method described in “Erosion 'Collusion and Utilization Technology, Issuer: IPC Co., Ltd.'”. However, the dimensions of discs, test pieces, etc. are different.
- test pieces 3a ', 3b' and 3c 'having the same coating thickness as shown in Fig. 5 (B) were prepared.
- the test pieces were set in a test apparatus 10 ′ shown in FIGS. 6 and 7.
- 11 ' is a test tank defining a chamber 12', 13 'is rotatably supported in the test tank 11', and one surface (the left surface in Fig. 6) has test pieces 3a, 3a.
- a circular hole 15' (non-through hole) having a desired size (15 mm in diameter in the present embodiment) is formed on the upstream side in the rotating direction of the rotating body from the mounting position of the test piece. Have been.
- test piece was mounted on one side of a rotating disk 13 ', and was rotated by a motor 14' while immersed in water so that the cavitation generated by the rotation of the rotating body flowed toward the test piece. I went.
- the water pressure in the test tank is 0.
- Figs. 8 and 9 show the results obtained from the above test.
- Fig. 8 shows the relationship between the total perimeter of holes (average diameter 1 im or more) per unit area and the wear rate
- Fig. 9 shows the relationship between the void area ratio and the wear rate.
- the porosity area ratio per unit area and the total perimeter were determined by digital image processing after taking an enlarged photo of the hard coating surface into a computer. Prior to importing an enlarged photograph of the hard coating surface into a computer, the surface was polished along a flat surface to make voids (dents) easier to understand. It was determined by measuring the area of the dent and the perimeter of the dent.
- the wear rate of the coating increases as the total perimeter of the pores (average diameter 1 m or more) per unit area of the hard coating surface increases.
- wear rate 0. 5 mm 3 Z h selected to fit within around the total length becomes 6 0 0 0 0 / xm / mm 2 or less.
- the wear rate of the coating increases accordingly. In the present invention, if the wear rate is selected to be within 0.5 mm 3 Zh as in the case of the total perimeter length of the holes, the hole area ratio will be 3% or less.
- the total perimeter of the pores (average diameter of 1 m or more) per unit area and the pore area ratio each affect only the erosion resistance of the cavitation. If the upper limit of the wear rate is set to a value smaller than 0.5 mm 3 / h (for example, 0.2 mmVh), the void area ratio also becomes a small value (for example, 2%).
- a runner or impeller 30 of a pump is shown in a cross-sectional view in FIG. 10 as an example of a component for a fluid machine in which the coating according to the present invention is resistant to slurry erosion and cavitation erosion.
- the impeller 30 includes a hub 32 having a shaft hole 31 for receiving a rotating shaft, a disk-shaped main plate 33 radially outwardly extending radially outward from the hub 32, An annular side plate 34, which is separated from the main plate 33 in the axial direction (vertical direction in FIG. 2), and a circumferential direction between the main plate 33 and the side plate 34 (in the direction of the axis (Circumferential direction) and are arranged along the desired curved surface at equal intervals, and are constituted by a plurality of blades 35 integrally formed with the side plate and the main plate.
- the main plate 33 and the side plate 34 The flow path 36 through which the fluid flows is defined by the blades 35.
- a radially inner portion 37 of the flow path 36 serves as an inlet, and a radially outer portion 38 serves as an outlet.
- the annular side plate 3 4 has a circumferentially inner axially extending portion 34a and a radially outwardly extending portion 34b, the axially extending portion 34a defining the inlet 39 of the impeller 30. are doing.
- the particles of the sediment in the water will cause the surface of the impeller 30, especially the impeller 30 to rotate.
- the inner surface 41 of the main plate 33, the inner surface 42 of the side plate 34, and both surfaces of the wings 35, which define the flow path 36 inside, are rubbed against the pressure surface 43 and the suction surface 44. The surface will be worn excessively by friction.
- an appropriate spraying method among the above spraying methods A to C is appropriately selected to form the above-mentioned slurry erosion resistant sprayed coating.
- the impeller 30 of the present invention on which the slurry erosion resistant thermal spray coating is formed as described above is used for a fluid machine such as a water wheel or a pump.
- a vertical pump 50 is shown in cross section as an example of such a fluid machine.
- a pump 50 is provided with a casing 51 defining a pump chamber 52 for accommodating an impeller 30 according to the present invention, and an impeller 30 fixed to the lower end at an axis vertical.
- a sealing device 59 for preventing the leakage of water.
- the casing 51 is fixed on the tubular support 60 in a known manner.
- the casing 51 includes an upper disk-shaped end plate 53, a casing body 54 that defines a spiral outlet chamber 55, and a tubular cover 56.
- a cylindrical suction pipe 61 is connected to the lower end of the cover 56.
- the area ratio of hard particles on the surface of the hard coating or the hardness of the pipes is desired for the erosion caused by slurry, which is mainly composed of sediment and water, such as river water.
- a coating having high resistance to slurry erosion and resistance to cavitation erosion by setting the total perimeter of pores per unit area of the coating surface or the pore area ratio within a desired range. Can easily be formed by thermal spraying.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003242248A AU2003242248A1 (en) | 2002-06-07 | 2003-06-06 | Method for selecting material of coating film and coating film |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002166654A JP4081305B2 (ja) | 2002-06-07 | 2002-06-07 | 被膜の材料選定方法及び被膜 |
JP2002-166654 | 2002-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003104512A1 true WO2003104512A1 (ja) | 2003-12-18 |
Family
ID=29727635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/007199 WO2003104512A1 (ja) | 2002-06-07 | 2003-06-06 | 被膜の材料選定方法及び被膜 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP4081305B2 (ja) |
CN (1) | CN1668774A (ja) |
AU (1) | AU2003242248A1 (ja) |
WO (1) | WO2003104512A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100414116C (zh) * | 2005-09-30 | 2008-08-27 | 李子红 | 金属基陶瓷表层泵用复合叶轮的生产方法 |
CN102169071A (zh) * | 2011-01-21 | 2011-08-31 | 东南大学 | 一种基于挠性转子的旋转圆盘空蚀试验台 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5458356B2 (ja) * | 2009-10-07 | 2014-04-02 | 日本機械工業株式会社 | 2段バランス式消防用ポンプ |
CN114807820B (zh) * | 2022-05-17 | 2023-05-23 | 中国科学院兰州化学物理研究所 | 一种具有空蚀发光功能的预警防护涂层及其制备方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05163562A (ja) * | 1991-12-10 | 1993-06-29 | Kobe Steel Ltd | 金属部材及びその複合皮膜の形成方法 |
JPH10195625A (ja) * | 1997-01-08 | 1998-07-28 | Toshiba Corp | 耐摩耗コーティング部品およびその製造方法 |
JP2000192220A (ja) * | 1998-12-28 | 2000-07-11 | Tocalo Co Ltd | 計測器用保護管の製造方法 |
JP2002294428A (ja) * | 2001-03-28 | 2002-10-09 | Mitsubishi Heavy Ind Ltd | 熱遮蔽コーティング膜及びその製造方法 |
-
2002
- 2002-06-07 JP JP2002166654A patent/JP4081305B2/ja not_active Expired - Fee Related
-
2003
- 2003-06-06 WO PCT/JP2003/007199 patent/WO2003104512A1/ja active Application Filing
- 2003-06-06 AU AU2003242248A patent/AU2003242248A1/en not_active Abandoned
- 2003-06-06 CN CN03817143.0A patent/CN1668774A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05163562A (ja) * | 1991-12-10 | 1993-06-29 | Kobe Steel Ltd | 金属部材及びその複合皮膜の形成方法 |
JPH10195625A (ja) * | 1997-01-08 | 1998-07-28 | Toshiba Corp | 耐摩耗コーティング部品およびその製造方法 |
JP2000192220A (ja) * | 1998-12-28 | 2000-07-11 | Tocalo Co Ltd | 計測器用保護管の製造方法 |
JP2002294428A (ja) * | 2001-03-28 | 2002-10-09 | Mitsubishi Heavy Ind Ltd | 熱遮蔽コーティング膜及びその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100414116C (zh) * | 2005-09-30 | 2008-08-27 | 李子红 | 金属基陶瓷表层泵用复合叶轮的生产方法 |
CN102169071A (zh) * | 2011-01-21 | 2011-08-31 | 东南大学 | 一种基于挠性转子的旋转圆盘空蚀试验台 |
Also Published As
Publication number | Publication date |
---|---|
CN1668774A (zh) | 2005-09-14 |
AU2003242248A1 (en) | 2003-12-22 |
JP2004010975A (ja) | 2004-01-15 |
JP4081305B2 (ja) | 2008-04-23 |
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