CN114062164B - Device and method for evaluating falling stone impact resistance of surface coating of exposed movable structural member - Google Patents
Device and method for evaluating falling stone impact resistance of surface coating of exposed movable structural member Download PDFInfo
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- 239000011248 coating agent Substances 0.000 title claims abstract description 222
- 238000000576 coating method Methods 0.000 title claims abstract description 222
- 239000004575 stone Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000919 ceramic Substances 0.000 claims abstract description 38
- 238000011084 recovery Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 3
- 230000003116 impacting effect Effects 0.000 claims description 3
- 239000002345 surface coating layer Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 18
- 238000011156 evaluation Methods 0.000 abstract description 4
- 229910001234 light alloy Inorganic materials 0.000 abstract description 3
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000011056 performance test Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 239000008262 pumice Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses equipment and a method for evaluating falling stone impact resistance of a surface coating of a bare movable structural member, and belongs to coating performance tests. According to the equipment and the method for evaluating the anti-falling stone striking performance of the surface coating of the exposed movable structural member, the ceramic ball is used for simulating the falling stone striking problem possibly encountered under the actual working condition of the surface of the workpiece, the rating rule is formulated for the detection result, the deficiency of the detection means, the detection equipment and the evaluation standard in the related field is solved, the effective equipment and the method are provided for detecting the toughness and the anti-falling stone impact performance of the coating of the exposed light alloy movable structural member, the detection efficiency of the related workpiece is improved, and the risk of dangerous accidents caused by the failure of the coating of the movable structural member is reduced.
Description
Technical Field
The invention belongs to the field of coating performance test, and particularly relates to equipment and a method for evaluating the anti-falling stone striking performance of a surface coating of a bare movable structural member.
Background
Bare structural members such as hubs are often contacted with splashed falling rocks, silt and the like in practical application, and long-term service under similar environments can cause surface damage and even structural damage of the structural members, so that the structural members fail, and a large number of potential hazards and huge economic losses are generated. The surface of the structural member is protected, so that the surface damage of the structural member can be effectively reduced, and the service life of the structural member is further prolonged. At present, for structural members such as hubs made of magnesium alloy, aluminum alloy and the like, the surface of the structural members is often treated by adopting technologies such as laser cladding, spraying, coating, anodic oxidation, micro-arc oxidation and the like, so that a compact impact-resistant coating is formed on the surface of the structural members, and the purpose of improving the surface toughness of the structural members is achieved. However, the ceramic coating prepared by methods such as anodic oxidation, micro-arc oxidation and the like has the problems of high brittleness, poor toughness, easy falling off and the like, and the problems are particularly remarkable for exposed structural members such as hubs and the like. The method for evaluating the toughness of the coating on the surface of the exposed movable structural member such as the hub is established, the quality of the coating on the surface of the movable structural member is reflected, and whether the performance of the relevant coating under the actual working condition can meet the expectations or not is estimated with smaller cost, so that the coating preparation process is improved, the quality of the coating is improved, and the safety problem and the economic loss caused by structural member failure are reduced.
At present, the related equipment for detecting the anti-falling stone striking performance of the surface coating of the movable structural member such as a hub is fewer, and related detection means are deficient, so that a system and related test equipment for evaluating the anti-falling stone striking performance of the surface of the structural member under different working conditions are required to be established, the test and evaluation of the anti-falling stone striking performance of the surface of the structural member are realized, the service life of the structural member under the falling stone striking environment is better estimated, potential hazards possibly existing in practical production and application are eliminated, and economic losses caused by structural member failure due to falling stone striking are reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide equipment and a method for evaluating the falling stone impact resistance of a surface coating of a bare movable structural member.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the equipment for evaluating the falling stone striking resistance of the surface coating of the exposed movable structural member comprises a transverse supporting plate, wherein the transverse supporting plate is arranged on a base, two vertical supporting plates which are oppositely arranged are arranged on the transverse supporting plate, and a net-shaped stone outlet is formed in the top of the vertical supporting plate;
a digital display electronic weighing device is arranged on the transverse supporting plate, a tray is arranged on the digital display electronic weighing device, the tray is positioned right below the net-shaped stone outlet, and the tray is used for placing a sample;
a shielding frame is sleeved on the transverse supporting plate;
holes are arranged on the transverse supporting plate positioned at the periphery of the digital display electronic weighing device;
and a contraction end and a recovery box which are communicated are arranged between the transverse supporting plate and the base.
Furthermore, the bottom of the reticular stone outlet is provided with a replaceable partition board, and holes with the same size are uniformly distributed on the partition board.
A method for evaluating the anti-falling stone striking performance of a surface coating of a bare moving structure, which is carried out on the basis of the equipment disclosed by the invention, comprises the following operations:
pouring ceramic balls into the net-shaped stone outlet, falling the ceramic balls through the net-shaped stone outlet, impacting the sample and leaving pits on the surface of the sample;
the ceramic ball is impacted on the sample, the display value of the impacted digital display electronic scale is changed, after the flow of the ceramic ball is stable, the weight value displayed on the 3-5 digital display electronic scale is read, the average value is taken, and the average value is recorded as M 1 ；
After the impact is finished, the weight value displayed on the digital display electronic scale on the scale is read again and is recorded as M 2 Obtaining the impact force received by the sample through the two gravity values;
adjusting the size or density of the ceramic ball, repeating the above operation to obtain a series of impact force impact samples;
and evaluating the obdurability of the falling stone striking resistance of the sample coating according to the falling degree of the sample coating and the pit diameter on the sample coating.
Further, the calculation method of the impact force p applied to the coating in unit area is as follows:
p＝(M 2 -M 1 )/(g·S) (1)
wherein M is 1 For the weight average value displayed on the digital display electronic scale when the ceramic ball falling flow is stable, M 2 The weight value of the scale is read after the impact is finished, g is the gravitational constant, and the area of the impact surface of the sample S is equal to the gravitational constant.
Further, the concrete operation for evaluating the toughness of the falling rock striking resistance of the sample coating is as follows:
after the ceramic ball is impacted, measuring the diameter d of all complete pits perpendicular to the impact surface on the coating Concave recess Calculating the average value of the pitsCalculating the ratio of the average diameter of the pits to the diameter of the ceramic balls +.>In D c Evaluating the coating strength;
after the ceramic ball is impacted, measuring the area S of all complete pits perpendicular to the impact surface on the coating after the impact Concave recess Area S for coating to drop off inside pit Stripping off Calculate the average valueAnd->Calculating the ratio of +.>By S c Evaluating the toughness of the coating;
by D c And S is c Is a weighted sum K of c To evaluate the toughness of the sample coating.
Further, according to S c The coating toughness of the structural part is divided into 0-10 grades, and the corresponding coating toughness is gradually reduced:
according to D c Dividing the coating strength into 1-10 grades, and gradually reducing the coating strength corresponding to the 1-10 grades;
D c when=0, the coating toughness is 0 grade; 0 < D c When the strength of the coating is less than 0.1, the strength of the coating is 1 grade; d is more than or equal to 0.1 c When the strength of the coating is less than 0.2, the strength of the coating is grade 2; d is more than or equal to 0.2 c When the strength of the coating is less than 0.3, the strength of the coating is 3 grade; d is more than or equal to 0.3 c When the coating strength is less than 0.4, the coating strength is grade 4; d is more than or equal to 0.4 c When the coating strength is less than 0.5, the coating strength is 5 grade; d is more than or equal to 0.5 c When the coating strength is less than 0.6, the coating strength is 6 grade; d is more than or equal to 0.6 c At < 0.7, the coating strength is 7 grade; d is more than or equal to 0.7 c When the coating strength is less than 0.8, the coating strength is 8 grades; d is more than or equal to 0.8 c When the coating strength is less than 0.9, the coating strength is 9 grade; d is more than or equal to 0.9 c At < 1, the coating strength was 10 grade.
Further, according to S c Dividing the coating toughness of the structural part into 0-10 grades, and gradually reducing the coating toughness corresponding to 0-10 grades;
when S is c When=0, the coating toughness is 0 grade; s is more than 0 and less than c When the toughness of the coating is less than 0.1, the toughness of the coating is 1 grade; s is more than or equal to 0.1 c When the toughness of the coating is less than 0.2, the toughness of the coating is 2 grades; s is more than or equal to 0.2 c When the toughness of the coating is less than 0.3, the toughness of the coating is 3 grades; s is more than or equal to 0.3 c When the toughness of the coating is less than 0.4, the toughness of the coating is 4 grades; s is more than or equal to 0.4 c When the toughness of the coating is less than 0.5, the toughness of the coating is 5 grades; s is more than or equal to 0.5 c When the toughness of the coating is less than 0.6, the toughness of the coating is 6 grade; s is more than or equal to 0.6 c When < 0.7, S c Grade 7; s is more than or equal to 0.7 c When the toughness of the coating is less than 0.8, the toughness of the coating is 8 grades; s is more than or equal to 0.8 c When the toughness of the coating is less than 0.9, the toughness of the coating is 9 grades; s is more than or equal to 0.9 c At < 1, the coating toughness was 10 grade.
Further, K c ＝0.3D c +0.7S c 。
Further, the coating is suitable for micro-arc oxidation layers, anodic oxidation layers, electroplated layers, thermal spraying layers or paint layers on the surfaces of the light alloy movable structural parts.
Compared with the prior art, the invention has the following beneficial effects:
according to the equipment and the method for evaluating the anti-falling stone striking performance of the surface coating of the exposed movable structural member, the ceramic ball is used for simulating the falling stone striking problem possibly encountered under the actual working condition of the surface of the workpiece, the rating rule is formulated for the detection result, the deficiency of the detection means, the detection equipment and the evaluation standard in the related field is solved, the effective equipment and the method are provided for detecting the toughness and the anti-falling stone impact performance of the coating of the exposed light alloy movable structural member, the detection efficiency of the related workpiece is improved, and the risk of dangerous accidents caused by the failure of the coating of the movable structural member is reduced.
Drawings
FIG. 1 is a front view of an apparatus for evaluating the performance of a bare moving structure surface coating against pumice impact;
fig. 2 is a top view of an apparatus for evaluating the performance of a bare moving structure surface coating against pumice impact.
Wherein: 1-a net-shaped stone outlet; 2-a vertical supporting plate; 3-a shielding frame; 4-sample; 5-a tray; 6-a digital display electronic scale; 7-a transverse support plate; 8-a constriction end; 9, a recovery box; 10-a base.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1 and 2, fig. 1 and 2 are front and top views, respectively, of an apparatus for evaluating the performance of a bare moving structure surface coating against pummel, by using which the structure surface coating is tested for toughness. The invention relates to equipment for evaluating falling stone impact resistance of a surface coating of a bare movable structural member, which comprises a transverse supporting plate 7, wherein the transverse supporting plate 7 is supported on a base 10, two vertical supporting plates 2 which are oppositely arranged are arranged on the transverse supporting plate 7, and a net-shaped stone outlet 1 is arranged at the top of the vertical supporting plate 2; a digital display electronic scale 6 is arranged on the transverse supporting plate 7, a tray 5 is arranged on the digital display electronic scale 6, the tray 5 is positioned right below the net-shaped stone outlet 1, and the tray 5 is used for placing a sample 4; a shielding frame 3 is sleeved on the transverse supporting plate 7; holes are arranged on a transverse supporting plate 7 positioned at the periphery of the digital display electronic scale 6; a contraction end 8 and a recovery box 9 which are communicated are arranged between the transverse supporting plate 7 and the base 10; the recovery box 9 is of a drawing type.
The bottom of the reticular stone outlet 1 is provided with a replaceable baffle plate, and holes are arranged on the baffle plate, and the holes are uniform in size and uniform in distribution, so that the surface of a sample to be detected is guaranteed to be hit uniformly; the purpose of detection according to different detection requirements is achieved by replacing the partition plates with different pore sizes and densities. The reticular stone outlet 1 can be adjusted according to the detection requirements of the size of a detection sample, the strength of the sample, the impact force and the like, and the flow and the particle size of the ceramic balls are controlled through the reticular stone outlet 1 in the detection process to adjust the impact force.
The periphery of the digital display electronic weighing device 6 is surrounded by the shielding frame 3, so that the ceramic ball splashing prevention effect is achieved, the safety of the detection process is facilitated, and the ceramic ball can be conveniently recycled.
The working principle of the invention is as follows:
the ceramic balls are used for replacing falling stones, the ceramic balls are poured into the net-shaped stone outlet 1, the ceramic balls fall onto holes and samples of the transverse supporting plate 7, the ceramic balls fall into the recovery box 9 from the shrinkage end 8 after passing through the holes, the recovery box 9 can be pulled out after the ceramic balls are collected, and the recovered ceramic balls are used or poured into the net-shaped stone outlet for detection again;
the ceramic ball is impacted on the sample, the display value of the impacted digital display electronic scale 7 is changed, after the flow of the ceramic ball is stable, the weight value displayed on the 3-5 digital display electronic scale 7 is read, the average value is taken, and the average value is recorded as M 1 The method comprises the steps of carrying out a first treatment on the surface of the After the impact is finished, the weight value displayed on the digital display electronic scale 7 on the scale is read again and is recorded as M 2 The impact force applied to the sample is obtained through the two gravity values, so that the impact of different impact forces on the sample is realized.
A method for evaluating the anti-falling stone striking performance of a surface coating of a bare movable structural member comprises the following specific implementation steps:
according to the performance requirement and the size of a sample to be tested, determining test conditions such as acting force, falling stone height, impact speed, falling stone size and the like to be applied to the surface of the sample;
pouring ceramic balls into the net-shaped stone outlet 1, falling the ceramic balls through the net-shaped stone outlet 1, impacting the surface of the sample 4 and leaving pits on the surface of the sample 4;
the ceramic ball is impacted on the sample, the display value of the impacted digital display electronic scale 7 is changed, after the flow of the ceramic ball is stable, the weight value displayed on the 3-5 digital display electronic scale 7 is read, the average value is taken, and the average value is recorded as M 1 (kg); after the impact is finished, the weight value displayed on the digital display electronic scale 7 on the scale is read again and is recorded as M 2 (kg) obtaining the impact force received by the sample by the two gravity values;
the impact force p (Pa) applied to the coating in unit area is calculated as follows:
p＝(M 2 -M 1 )/(g·S) (1)
wherein M is 1 For the weight average value displayed on the digital display electronic scale when the ceramic ball falling flow is stable, M 2 To read the weight value on the scale after the impact is over, g is the gravitational constant, S (m 2 ) The area of the impact surface of the sample.
The ceramic balls fall into the recovery box through holes in the transverse supporting plate 7 so as to be convenient for recovery and reuse.
And after the falling rock striking is finished, comprehensively evaluating the falling rock striking resistance and the coating toughness of the coating on the surface of the sample by the falling rock striking resistance, the pit diameter of the surface of the sample, the crack expansion degree of the macroscopic coating and the crack expansion degree of the microscopic coating. The obdurability of the coating is evaluated by using the pit diameter and the coating shedding area, and the evaluation method is as follows:
measuring all complete pit diameters d perpendicular to the impact surface on the coating Concave recess And calculate the arithmetic mean value thereofCalculating the ratio of pit diameter to ceramic ball diameter +.>Wherein D is c Can be used for evaluating the coating strength of the movable structural part independently according to D c The coating strength of the structural part is divided into 1-10 grades according to the values, and the corresponding coating strength is gradually reduced: d (D) c When=0, the coating toughness is 0 grade; 0 < D c When the strength of the coating is less than 0.1, the strength of the coating is 1 grade; d is more than or equal to 0.1 c When the strength of the coating is less than 0.2, the strength of the coating is grade 2; d is more than or equal to 0.2 c When the strength of the coating is less than 0.3, the strength of the coating is 3 grade; d is more than or equal to 0.3 c When the coating strength is less than 0.4, the coating strength is grade 4; d is more than or equal to 0.4 c When the coating strength is less than 0.5, the coating strength is 5 grade; d is more than or equal to 0.5 c When the coating strength is less than 0.6, the coating strength is 6 grade; d is more than or equal to 0.6 c At < 0.7, the coating strength is 7 grade; d is more than or equal to 0.7 c When the coating strength is less than 0.8, the coating strength is 8 grades; d is more than or equal to 0.8 c When the coating strength is less than 0.9, the coating strength is 9 grade; d is more than or equal to 0.9 c At < 1, the coating strength was 10 grade.
ImpactAfter completion, all complete pit areas S perpendicular to the impact surface on the post-impact coating were measured Concave recess Area S for coating to drop off inside pit Stripping off And calculate the arithmetic mean value thereofAnd->Calculating the ratio of +.>By S c Evaluating the toughness of the coating; according to S c The coating toughness of the structural part is divided into 0-10 grades, and the corresponding coating toughness is gradually reduced: s is S c When=0, the coating toughness is 0 grade; s is more than 0 and less than c When the toughness of the coating is less than 0.1, the toughness of the coating is 1 grade; s is more than or equal to 0.1 c When the toughness of the coating is less than 0.2, the toughness of the coating is 2 grades; s is more than or equal to 0.2 c When the toughness of the coating is less than 0.3, the toughness of the coating is 3 grades; s is more than or equal to 0.3 c When the toughness of the coating is less than 0.4, the toughness of the coating is 4 grades; s is more than or equal to 0.4 c When the toughness of the coating is less than 0.5, the toughness of the coating is 5 grades; s is more than or equal to 0.5 c When the toughness of the coating is less than 0.6, the toughness of the coating is 6 grade; s is more than or equal to 0.6 c When < 0.7, S c Grade 7; s is more than or equal to 0.7 c When the toughness of the coating is less than 0.8, the toughness of the coating is 8 grades; s is more than or equal to 0.8 c When the toughness of the coating is less than 0.9, the toughness of the coating is 9 grades; s is more than or equal to 0.9 c At < 1, the coating toughness was 10 grade.
In practical tests, it was found that once the coating falls off over a large area, it would cause the substrate to be hit directly by the rubble and come into contact with the corrosive medium. The toughness of the coating is therefore more important for the surface of the moving structure. According to the orthogonal test results of different ceramic ball diameters and different coating materials, when the strength coefficient of the coating is 0.3 and the toughness coefficient is 0.7, the obtained comprehensive toughness result is reliable. According to D above c 、S c And comprehensively evaluating the toughness of the coating according to the actual detection result: k (K) c ＝0.3D c +0.7S c . The comprehensive toughness of the coating of the structural part is divided into 0-10 grades according to the Kc value, and the comprehensive toughness of the corresponding coating is gradually reduced: k (K) c When=0, the coating comprehensive toughness is 0 grade; k is more than 0 c When the total toughness of the coating is less than 0.1, the comprehensive toughness of the coating is 1 grade; k is more than or equal to 0.1 c When the total toughness of the coating is less than 0.2, the comprehensive toughness of the coating is 2 grade; k is more than or equal to 0.2 c When the total toughness of the coating is less than 0.3, the comprehensive toughness of the coating is 3 grade; k is more than or equal to 0.3 c When the total toughness of the coating is less than 0.4, the comprehensive toughness of the coating is 4 grade; k is more than or equal to 0.4 c When the total toughness of the coating is less than 0.5, the comprehensive toughness of the coating is 5 grade; k is more than or equal to 0.5 c When the total toughness of the coating is less than 0.6, the comprehensive toughness of the coating is 6 grade; k is more than or equal to 0.6 c When < 0.7, S c Grade 7; k is more than or equal to 0.7 c When the total toughness of the coating is less than 0.8, the total toughness of the coating is 8 grade; k is more than or equal to 0.8 c When the total toughness of the coating is less than 0.9, the comprehensive toughness of the coating is 9 grade; k is more than or equal to 0.9 c When the total toughness of the coating is less than 1, the total toughness of the coating is 10 grades.
Therefore, the method for evaluating the falling stone striking performance is based on falling stone striking detection equipment for simulating different working conditions, and effectively simulates the falling stone striking condition possibly suffered by a sample such as a hub under the actual working conditions. And the porosity and the pore size of the reticular stone outlet are changed by replacing the partition plates so as to control the granularity and the density of the falling rocks, thereby controlling the impact force and further realizing the test of the falling rocks striking resistance of the sample under different working conditions.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. The method for evaluating the falling stone striking performance of the surface coating of the exposed movable structural member is characterized by being performed based on falling stone striking performance resisting equipment for evaluating the surface coating of the exposed movable structural member and comprising a transverse supporting plate (7), wherein the transverse supporting plate (7) is arranged on a base (10), two vertical supporting plates (2) which are oppositely arranged are arranged on the transverse supporting plate (7), and a net-shaped stone outlet (1) is formed in the top of each vertical supporting plate (2);
a digital display electronic weighing device (6) is arranged on the transverse supporting plate (7), a tray (5) is arranged on the digital display electronic weighing device (6), the tray (5) is positioned right below the net-shaped stone outlet (1), and the tray (5) is used for placing a sample (4);
a shielding frame (3) is sleeved on the transverse supporting plate (7);
holes are arranged on a transverse supporting plate (7) positioned at the periphery of the digital display electronic weighing device (6);
a contraction end (8) and a recovery box (9) which are communicated are arranged between the transverse supporting plate (7) and the base (10);
comprising the following operations:
pouring ceramic balls into the net-shaped stone outlet (1), falling the ceramic balls through the net-shaped stone outlet (1), impacting on the sample (4) and leaving pits on the surface of the sample (4);
the ceramic ball is impacted on the sample (4) and the display value of the impacted digital display electronic weighing device (6) is changed, after the flow of the ceramic ball is stable, the weight value displayed on the 3-5 digital display electronic weighing device (6) is read and averaged, and the weight value is recorded asM 1 ；
After the impact is finished, the weight value displayed on the digital display electronic scale (6) on the scale is read again and recorded asM 2 The impact force received by the sample (4) is obtained through the two weight values;
adjusting the size or density of the ceramic balls, repeating the above operation to obtain a series of samples (4) impacted by impact force;
and evaluating the obdurability of the falling rock striking resistance of the coating of the sample (4) according to the falling degree of the coating of the sample (4) and the pit diameter on the coating of the sample (4).
2. The method for evaluating the falling stone strike resistance of the surface coating of the exposed dynamic structure according to claim 1, wherein the specific operation of evaluating the toughness of the falling stone strike resistance of the coating of the sample (4) is as follows:
after the ceramic ball is impacted, measuring the diameter of all complete pits perpendicular to the impact surface on the coatingCalculating the average value +.>Calculating the ratio D of the average diameter of the pit to the diameter of the ceramic ball c =/>In D c Evaluating the coating strength;
after the ceramic ball is impacted, measuring the area of all complete pits perpendicular to the impact surface on the coating after the impactArea of coating drop inside pit +.>Calculate the average +.>And->Calculating the ratio S of the two c =/>In S form c Evaluating the toughness of the coating;
by D c And S is c Is a weighted sum K of c The toughness of the coating of sample (4) was evaluated.
3. The method for evaluating the chipping resistance of a surface coating layer of a bare moving structure according to claim 2, wherein, according to S c The coating toughness of the structural part is divided into 0-10 grades, and the corresponding coating toughness is gradually reduced:
according to D c Dividing the coating strength into 1-10 grades, and gradually reducing the coating strength corresponding to the 1-10 grades;
D c when=0, the coating toughness is 0 grade; 0 < D c When the strength of the coating is less than 0.1, the strength of the coating is 1 grade; d is more than or equal to 0.1 c When the strength of the coating is less than 0.2, the strength of the coating is grade 2; d is more than or equal to 0.2 c When the strength of the coating is less than 0.3, the strength of the coating is 3 grade; d is more than or equal to 0.3 c When the coating strength is less than 0.4, the coating strength is grade 4; d is more than or equal to 0.4 c When the coating strength is less than 0.5, the coating strength is 5 grade; d is more than or equal to 0.5 c When the coating strength is less than 0.6, the coating strength is 6 grade; d is more than or equal to 0.6 c At < 0.7, the coating strength is 7 grade; d is more than or equal to 0.7 c When the coating strength is less than 0.8, the coating strength is 8 grades; d is more than or equal to 0.8 c When the coating strength is less than 0.9, the coating strength is 9 grade; d is more than or equal to 0.9 c At < 1, the coating strength was 10 grade.
4. A method for evaluating the chipping resistance of a surface coating of a bare moving structure according to claim 3 wherein, according to S c Dividing the coating toughness of the structural part into 0-10 grades, and gradually reducing the coating toughness corresponding to 0-10 grades;
when S is c When=0, the coating toughness is 0 grade; s is more than 0 and less than c When the toughness of the coating is less than 0.1, the toughness of the coating is 1 grade; s is more than or equal to 0.1 c When the toughness of the coating is less than 0.2, the toughness of the coating is 2 grades; s is more than or equal to 0.2 c When the toughness of the coating is less than 0.3, the toughness of the coating is 3 grades; s is more than or equal to 0.3 c When the toughness of the coating is less than 0.4, the toughness of the coating is 4 grades; s is more than or equal to 0.4 c When the toughness of the coating is less than 0.5, the toughness of the coating is 5 grades; s is more than or equal to 0.5 c When the toughness of the coating is less than 0.6, the toughness of the coating is 6 grade; s is more than or equal to 0.6 c When < 0.7, S c Grade 7; s is more than or equal to 0.7 c When the toughness of the coating is less than 0.8, the toughness of the coating is 8 grades; s is more than or equal to 0.8 c When the toughness of the coating is less than 0.9, the toughness of the coating is 9 grades; s is more than or equal to 0.9 c At < 1, the coating toughness was 10 grade.
5. The method for evaluating the chipping resistance of a surface coating of a bare moving structure according to claim 4 wherein K is c =0.3D c +0.7S c 。
6. The method for evaluating the anti-falling stone hitting performance of the surface coating of the exposed dynamic structural member according to claim 1, wherein the bottom of the net-shaped stone outlet (1) is provided with a replaceable partition plate, and holes with the same size are uniformly distributed on the partition plate.
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