CN111809135B - Locatable piece and manufacturing method - Google Patents
Locatable piece and manufacturing method Download PDFInfo
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- CN111809135B CN111809135B CN202010694230.8A CN202010694230A CN111809135B CN 111809135 B CN111809135 B CN 111809135B CN 202010694230 A CN202010694230 A CN 202010694230A CN 111809135 B CN111809135 B CN 111809135B
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- 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
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- 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
-
- 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
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
Abstract
The invention provides a positioning piece and a manufacturing method thereof, wherein the positioning piece comprises a positioning piece body, a first magnetic induction part and a second magnetic induction part, the first magnetic induction part and the second magnetic induction part are distributed on the positioning piece body, the first magnetic induction part comprises a non-magnetic metal coating and a weak magnetic metal ceramic coating, and the second magnetic induction part comprises carbon-based tungsten alloy weak magnetic ceramic. Compared with the prior art, the invention has the beneficial effects that: (1) the positioning piece is integrally wear-resistant and measurable, and has excellent mechanical property; (2) when the positioning piece is used, the signal ratio is good; (3) the spraying of the magnetic scale and the positioning piece can be finished at one time, and the process efficiency is improved.
Description
Technical Field
The field relates to the field of positioning devices, in particular to a positioning piece and a manufacturing method thereof.
Background
In the engineering equipment field, the equipment that needs carry out positioning control and monitoring to the stroke can set up the magnetic force scale on equipment, then cooperates the difference of magnetic force signal of magnetic force check out test set detection difference in different regions, when both relative motion, forms pulse signal and then reaches equipment position control and measuring purpose because of the change of magnetic force.
However, the existing locatable apparatus with magnetic force detection has the technical defects of no wear resistance and low mechanical strength, so it is necessary to develop an apparatus satisfying high mechanical strength on the premise of providing a resolution signal.
Disclosure of Invention
To solve the above technical problems, the present invention provides a positionable member and a method for manufacturing the same.
The specific technical scheme is as follows:
the positionable part is characterized by comprising a positioning part body, a first magnetic induction part and a second magnetic induction part, wherein the first magnetic induction part and the second magnetic induction part are distributed on the positioning part body, the first magnetic induction part comprises a first coating and a second coating, the first coating is a non-magnetic metal coating, the second coating is a weak-magnetic metal ceramic coating, the second magnetic induction part comprises a weak-magnetic metal ceramic coating, and the second magnetic induction part is distributed at the part of the first magnetic induction part which is not distributed;
the non-magnetic metal coating comprises a nickel-chromium non-magnetic alloy coating, the weak magnetic metal ceramic coating comprises a carbon-based tungsten-cobalt-chromium weak magnetic metal ceramic coating, and the positioning piece body is made of magnetic alloy steel.
Further, the first coating and the second coating of the first magnetic induction part are sequentially overlapped from bottom to top; the first magnetic induction parts are uniformly distributed along the positioning piece body.
Furthermore, the first magnetic induction part also comprises a first magnetic induction groove arranged on the positioning piece body, the first coating is filled in the first magnetic induction groove, and the second coating covers the first coating; the first magnetic induction groove is a spiral groove, a positive annular groove or a trapezoidal groove.
Furthermore, the positioning part is a piston rod, the positioning part body is a piston rod body, and the first magnetic induction groove is a scale groove.
Further, the first magnetic induction groove is a spiral groove, the width of the first magnetic induction groove is 5mm, and the depth of the first magnetic induction groove is 0.3 mm-0.5 mm.
The difference between the manufacturing method of the positioning piece is that the manufacturing method comprises the following steps:
step S1: spraying the non-magnetic metal coating on the first magnetic induction part;
step S2: spraying weak magnetic metal ceramic coatings on the first magnetic induction part and the second magnetic induction part;
step S3: grinding to be smooth.
Further, the step S1 specifically includes the following steps:
step S1-1: first magnetic induction grooves are uniformly distributed on the positioning piece body;
step S1-2: and filling the non-magnetic metal coating in the first magnetic induction groove.
Further, the step S2 specifically includes the following steps:
step S2-1: removing the non-magnetic metal coating outside the first magnetic induction groove on the positioning piece body;
step S2-2: leveling and roughening the non-magnetic metal coating in sequence;
step S2-3: and spraying the weak-magnetism metal ceramic coating on the surface of the non-magnetic metal coating and the surface of the positioning piece body.
Further, the non-magnetic metal coating is sprayed by adopting a plasma spraying process; the weak magnetic metal ceramic coating is sprayed by adopting a supersonic spraying process.
The positioning device is characterized by comprising magnetic signal detection equipment, the positioning piece and magnetic signal receiving equipment.
Compared with the prior art, the invention has the beneficial effects that: (1) the positioning piece is integrally wear-resistant and measurable, and has excellent mechanical property; (2) when the positioning piece is used, the signal ratio is good; (3) the spraying of the magnetic scale and the positioning piece can be finished at one time, and the process efficiency is improved.
Drawings
FIG. 1 is a top view of a right circular groove;
FIG. 2 is a cross-sectional view of a spiral groove;
FIG. 3 is a cross-sectional view of a trapezoidal groove;
wherein, the solid part-1, the groove-2 and the internal thread-3.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
A locatable piece comprises a locating piece body, a first magnetic induction part and a second magnetic induction part, wherein the first magnetic induction part and the second magnetic induction part are distributed on the locating piece body;
the non-magnetic metal coating comprises a nickel-chromium non-magnetic alloy coating, the weak magnetic metal ceramic coating comprises a carbon-based tungsten-cobalt-chromium weak magnetic metal ceramic coating, and the positioning piece body is made of magnetic alloy steel.
In the invention, the locatable part is formed by coating distribution with different magnetic strengths, different signals are detected by magnetic equipment subsequently and monitored and measured, and when a person skilled in the art selects a coating as a measurable engineering equipment material, in order to ensure the signal stability of subsequent use, a nonmagnetic ceramic coating is often selected, and the nonmagnetic coating is often adopted for avoiding the metal with better mechanical property because of considering the signal problem, but the nonmagnetic ceramic coating needs plasma spraying for preparation, and has the defects of easy breakage, low strength and the like, the processing is difficult, and the metal is easy to damage when in engineering use. However, the research of the invention finds that the non-magnetic metal coating and the weak-magnetic metal ceramic coating are selected to be used in combination as the measuring coating, and the weak-magnetic metal ceramic coating covers the alloy steel, so that the signal can be distinguished, and the strength and the wear resistance are better compared with the ceramic coating used in the prior art.
In the invention, the first coating and the second coating of the first magnetic induction part are sequentially overlapped from bottom to top; the first magnetic induction parts are uniformly distributed along the positioning piece body.
The magnetic metal ceramic coating spraying is selected to be better in mechanical strength of the whole equipment at the positioning piece body, so that when the first magnetic induction part is designed, the non-magnetic metal coating is adopted, the weak magnetic metal ceramic coating is sequentially overlapped from bottom to top, and when the weak magnetic metal ceramic coating is sprayed, the coating of the first magnetic induction part, the coating of the second magnetic induction part and the coating of the positioning piece body can be completed, and the process efficiency can also be improved.
The first magnetic induction part further comprises a first magnetic induction groove formed in the positioning piece body, and the non-magnetic metal coating and the weak magnetic metal ceramic coating are filled in the first magnetic induction groove.
The first magnetic induction parts are uniformly distributed along the positioning part body, and a coating is refilled by slotting on the positioning part which needs to be accurately measured to form scales.
The locating piece is a piston rod, the locating piece body is a piston rod body, and the first magnetic induction groove is a scale groove.
In the invention, the first magnetic induction groove is a spiral groove, a positive annular groove or a trapezoidal groove, and a good signal ratio can be obtained by adopting the groove type to match with a selected proper coating and a selected proper rod body.
The spiral groove is further optimized, and the signal ratio of the spiral groove is the best in matching with a selected proper coating and a proper rod body.
Furthermore, the width of the first magnetic induction groove is 5mm, and the depth of the first magnetic induction groove is 0.3 mm-0.5 mm.
The signal ratio can be further optimized by designing the size.
The difference between the manufacturing method of the positionable member and the manufacturing method is that the manufacturing method comprises the following steps:
step S1: spraying the non-magnetic metal coating on the first magnetic induction part;
step S2: spraying weak magnetic metal ceramic coatings on the first magnetic induction part and the second magnetic induction part;
step S3: grinding to be smooth.
Further, the step S1 specifically includes the following steps:
step S1-1: first magnetic induction grooves are uniformly distributed on the positioning piece body;
step S1-2: and filling the non-magnetic metal coating in the first magnetic induction groove.
Further, the step S2 specifically includes the following steps:
step S2-1: removing the non-magnetic metal coating outside the first magnetic induction groove on the positioning piece body;
step S2-2: leveling and roughening the non-magnetic metal coating in sequence;
step S2-3: and spraying the weak-magnetism metal ceramic coating on the surface of the non-magnetic metal coating and the surface of the positioning piece body.
In step S2-2, the non-magnetic metal coating is subsequently leveled and roughened to increase the adhesion of the subsequent weakly magnetic cermet coating.
The non-magnetic metal coating is sprayed by adopting a plasma spraying process; the weak magnetic metal ceramic coating is sprayed by adopting a supersonic velocity spraying (HVOF) process.
More preferably, the weakly magnetic cermet coating is applied using a high velocity oxygen spray (HVOF) process having the parameters as set forth in the following table.
More preferably, the non-magnetic metal coating is sprayed by adopting a plasma spraying process, the equipment is F4-ZB80, and the specific process parameters are as follows:
| voltage (V) | Current (A) | H2Carrier gas (L/min) | Gun distance (mm) |
| 50～60 | 432～450 | 6.5～6.8 | 120 |
Reasonable product design parameters are combined with an optimal manufacturing method, and the mechanical property of the product is better improved.
Further, the low magnetic cermet coating was applied using a high velocity oxygen spray (HVOF) process as shown in the following table.
More preferably, the non-magnetic metal coating is sprayed by adopting a plasma spraying process, the equipment is F4-ZB80, and the specific process parameters are as follows:
by adopting the better method and combining reasonable product manufacturing parameters, the mechanical performance parameters are improved better.
The positioning device is characterized by comprising magnetic signal detection equipment, the positioning piece and magnetic signal receiving equipment which are connected together.
Example 1
Study of spray coating Process
1.1 study of spraying technique of nonmagnetic Metal coating
The non-magnetic metal coating is sprayed on different sample plates by different processes, the sample plates are made of metal low-carbon alloy steel, and the process parameters are shown in table 1:
TABLE 1 spraying technology of non-magnetic metal coating
1.2 Weak magnetism cermet coating spraying process research
Spraying the weak magnetic metal ceramic coating on different sample plates by different processes, wherein the sample plates are made of metal low-carbon alloy steel, and the process parameters are shown in table 2:
TABLE 2 study of spraying technique of weak magnetic cermet coating
1.3 study of composite coating spray coating Process
The sample plate is firstly sprayed with a nonmagnetic metal coating, and then is sprayed with a weak magnetic metal ceramic coating after being leveled and roughened, wherein the process parameters are shown in table 3.
TABLE 3 concrete parameters of the composite coating spraying process
In this embodiment, the carbon-based tungsten-cobalt-chromium weak magnetic cermet coating is composed of the following components in percentage by mass.
| C(％) | O(％) | Co(％) | Ni(％) | Cr(％) |
| 5.23 | 0.03 | 10.05 | 0.58 | 3.98 |
The balance is W, totaling 100%.
In this example, the nickel-chromium nonmagnetic alloy coating is: NiCr alloy coating (produced as a matt powder).
Example 2
Piston rod preparation that the stroke of different cell body designs can accurate control:
the piston cylinder is made of metal low-carbon alloy steel (with magnetism), the first magnetic induction parts are uniformly distributed along the positioning piece body, the second magnetic induction parts are distributed at the parts, which are not distributed, of the first magnetic induction parts, the first magnetic induction parts further comprise first magnetic induction grooves formed in the positioning piece body, nonmagnetic metal coatings are filled in the first magnetic induction grooves, and weak-magnetism metal ceramic coatings cover the surfaces of the nonmagnetic metal coatings; the second magnetic induction part is sprayed with a weak magnetic metal ceramic coating, the non-magnetic metal coating is a nickel-chromium non-magnetic alloy coating, the weak magnetic metal ceramic coating is a carbon-based tungsten-cobalt-chromium weak magnetic metal ceramic coating, and the specific design parameters are shown in table 6.
In this embodiment, the carbon-based tungsten-cobalt-chromium weak magnetic cermet coating is composed of the following components in percentage by mass.
| C(％) | O(％) | Co(％) | Ni(％) | Cr(％) |
| 5.23 | 0.03 | 10.05 | 0.58 | 3.98 |
The balance is W, totaling 100%.
In this example, the nickel-chromium nonmagnetic alloy coating is: NiCr alloy coating (produced as a matt powder).
The specific steps of the preparation are as follows:
step S1: spraying the non-magnetic metal coating on the first magnetic induction part;
the step S1 specifically includes the following steps:
step S1-1: first magnetic induction grooves are uniformly distributed on the positioning piece body;
step S1-2: and filling the first magnetic induction groove with the non-magnetic metal coating.
Step S2: and spraying a weak magnetic metal ceramic coating on the surface of the non-magnetic metal coating and the second magnetic induction part.
The step S2 specifically includes the following steps:
step S2-1: removing the non-magnetic metal coating outside the first magnetic induction groove on the positioning piece body;
step S2-2: leveling and roughening the non-magnetic metal coating in sequence;
step S2-3: and spraying the weak-magnetism metal ceramic coating on the surface of the non-magnetic metal coating and the surface of the positioning piece body.
Step S3: grinding to be smooth.
The parameters of the magnetic cermet coating using the high velocity oxygen spray (HVOF) process are shown in Table 4.
TABLE 4 supersonic spraying (HVOF) Process parameters
The non-magnetic metal coating is sprayed by adopting a plasma spraying process, the equipment is F4-ZB80, and the specific process parameters are shown in Table 5:
TABLE 5 plasma spray Process parameters
Table 6 design parameters for piston rod of example 2
Wherein, the shape of the regular annular groove is as shown in figure 1, the middle part is a solid part 1, and a groove 2 is arranged along the solid part;
fig. 2 is a cross-sectional view of a spiral groove with internal threads 3.
Comparative example 1
Preparing a piston rod according to a manufacturing method of a model 2-2 and design parameters of a groove body in the embodiment 2, wherein the only difference is that a nickel-chromium nonmagnetic alloy coating and an AT-20 coating are sequentially overlapped and filled in the first magnetic induction groove from bottom to top, and the coating of the second magnetic induction part is an AT-20 coating with a model D-1; meanwhile, a weakly magnetic cermet coating sample plate was manufactured in the manner of example 1-2 according to the spray process of manufacture model D-1.
Preparing a piston rod according to the manufacturing method and the design parameters of the groove body of the model 2-5 in the embodiment 2, wherein the only difference is that a nickel-chromium nonmagnetic alloy coating and an AT-20 coating are sequentially overlapped and filled in the first magnetic induction groove from bottom to top, and the coating of the second magnetic induction part is the AT-20 coating with the model D-2; meanwhile, a weak magnetic metal ceramic coating sample plate is manufactured according to the manufacturing model D-2 spraying process method and the mode of the embodiment 1-2.
Example 3
The piston rods of the types of example 1, the piston rods of the types of example 2 and the piston rod S1 widely used in the market were tested, and the piston rods of the types of comparative example 1 were subjected to performance tests.
3.1 model 2-2 in example 2 and the sample plate 1-2-1, piston rod S1 corresponding to the process, and piston rod of each model in comparative example 1 were tested for hardness, coating adhesion, signal ratio, and porosity.
The hardness and porosity testing method comprises the following steps: GB/T9790-1988;
the coating binding force test method comprises the following steps: GB/T8642-2002;
the signal ratio test method comprises the following steps: NB/T35017-2013;
the test results are shown in table 7.
TABLE 73.1 test results of the test experiments
| Model number | Hardness of surface layer | Binding force (MPa) | Signal ratio | Porosity of the material |
| 2-2 | HV1255 | 60～72 | 0.7 | ≤1％ |
| D1 | HV780 | 25～30 | 0.65 | 5％～10％ |
| D2 | HV750 | 26～31 | 0.73 | 4％～8％ |
3.2 Signal ratio experiments were conducted on piston rods of various types and S1 in example 2.
The signal ratio test method comprises the following steps: NB/T35017-2013;
the test results are shown in table 8.
TABLE 83.2 test results of the test experiments
| Model number | Signal ratio |
| 2-1 | 0.62 |
| 2-3 | 0.6 |
| 2-4 | 0.5 |
| 2-5 | 0.4 |
| 2-6 | 0.75 |
| 2-7 | 0.85 |
| S1 | 0.68 |
3.3 hardness and porosity tests were performed on each type of sample plate manufactured in example 1.
The test method is GB/T9790-1988;
the test results are tabulated below.
Table 9 example 1.1 test results
| Model number | Hardness of surface layer (HRC) | Porosity (%) |
| 1-1-1 | 30 | 0.48 |
| 1-1-2 | 28 | 0.5 |
Table 10 example 1.2 test results
| Model number | Hardness of surface layer (HV0.2) | Porosity (%) |
| 1-2-1 | 1255 | 0.72 |
| 1-2-2 | 1108 | 0.8 |
| 1-2-3 | 1180 | 0.75 |
TABLE 111.3 Experimental test results
| Model number | Hardness (HV0.2) | Porosity of the material |
| 1-3-1 | 1120 | ≤1％ |
| 1-3-2 | 1280 | ≤1％ |
| 1-3-3 | 1185 | ≤1％ |
| 1-3-4 | 1207 | ≤1％ |
| 1-3-5 | 1250 | ≤1％ |
| 1-3-6 | 1190 | ≤1％ |
From the data, the comprehensive performance of the embodiment of the invention is superior to that of the commercial products and the comparative examples, and the signal ratio of the embodiment of the invention is ensured while the mechanical performance is improved by selecting the proper material coating matching process and the groove type design parameters.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A locatable piece is characterized in that the locatable piece comprises a locator piece body, a first magnetic induction part and a second magnetic induction part, the first magnetic induction part and the second magnetic induction part are distributed on the locator piece body, the first magnetic induction part comprises a first coating and a second coating, and the first coating and the second coating of the first magnetic induction part are sequentially overlapped from bottom to top;
the first coating is a non-magnetic metal coating, the second coating is a weak magnetic metal ceramic coating, the second magnetic induction part comprises a weak magnetic metal ceramic coating, and the second magnetic induction part is distributed at the part of the first magnetic induction part which is not distributed;
the non-magnetic metal coating comprises a nickel-chromium non-magnetic alloy coating, the weak magnetic metal ceramic coating comprises a carbon-based tungsten-cobalt-chromium weak magnetic metal ceramic coating, and the positioning piece body is made of magnetic alloy steel.
2. A positionable member according to claim 1, wherein the positionable member includes a plurality of first magnetic induction portions, the first magnetic induction portions being evenly distributed along the positionable member body.
3. The positionable member according to claim 1, wherein the first magnetic induction portion further comprises a first magnetic induction groove formed in the positioning member body, the first coating is filled in the first magnetic induction groove, and the second coating covers the first coating; the first magnetic induction groove is a spiral groove, a positive annular groove or a trapezoidal groove.
4. The positionable member according to claim 1 or 3, wherein the positionable member is a piston rod, the positionable member body is a rod body of the piston rod, and the first magnetic sensing groove is a scale groove.
5. The positionable member of claim 3, wherein the first magnetic induction slot is a spiral slot, the first magnetic induction slot having a slot width of 5mm and a slot depth of 0.3mm to 0.5 mm.
6. The method of manufacturing a positionable member according to claim 1, wherein the method of manufacturing comprises: step S1: spraying the non-magnetic metal coating on the first magnetic induction part;
step S2: spraying weak magnetic metal ceramic coatings on the first magnetic induction part and the second magnetic induction part;
step S3: grinding to be smooth.
7. The method for manufacturing a positionable member according to claim 6, wherein the step S1 specifically includes the steps of: step S1-1: first magnetic induction grooves are uniformly distributed on the positioning piece body;
step S1-2: and filling the non-magnetic metal coating in the first magnetic induction groove.
8. The method for manufacturing a positionable member according to claim 6, wherein the step S2 specifically includes the steps of: step S2-1: removing the non-magnetic metal coating outside the first magnetic induction groove on the positioning piece body;
step S2-2: leveling and roughening the non-magnetic metal coating in sequence;
step S2-3: and spraying the weak-magnetism metal ceramic coating on the surface of the non-magnetic metal coating and the surface of the positioning piece body.
9. The method for manufacturing the positionable member of claim 6, wherein the non-magnetic metal coating is sprayed using a plasma spray process; the weak magnetic metal ceramic coating is sprayed by adopting a supersonic spraying process.
10. A positioning device, comprising a magnetic signal detection device, the positionable member according to any one of claims 1 to 5, and a magnetic signal receiving device.
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| KR930011088B1 (en) * | 1989-04-22 | 1993-11-20 | 미쯔비시 덴끼 가부시기가이샤 | Twist detector |
| JP3136012B2 (en) * | 1992-12-24 | 2001-02-19 | カヤバ工業株式会社 | Position detection device |
| CN103774025B (en) * | 2012-10-23 | 2015-08-26 | 北京工业大学 | A kind of WC-FeNiCr containing Mn, Mo, Ti is without magnetic coating material and preparation method thereof |
| CN103174624B (en) * | 2013-03-11 | 2015-08-26 | 戴亚洲 | A kind of nanometer metal ceramic coating piston rod and manufacture method thereof |
| CN103757582B (en) * | 2014-02-12 | 2017-12-15 | 博睿泰达科技(北京)有限公司 | It is a kind of for oil aluminium drill pipe without the wear-resisting spray coating powder of magnetic |
| CN107236923A (en) * | 2017-06-12 | 2017-10-10 | 中国石油集团渤海钻探工程有限公司 | Improve expansion link surface abrasion resistance method |
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| CN109321864A (en) * | 2018-11-27 | 2019-02-12 | 广东省新材料研究所 | In the method for two sealing surface supersonic spray coating tungsten carbide-nickel chromium chromium carbide mixed coating of valve plate valve seat |
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