CN102145331B - Method for improving bonding strength of grooved substrate and coating - Google Patents
Method for improving bonding strength of grooved substrate and coating Download PDFInfo
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- CN102145331B CN102145331B CN 201110068667 CN201110068667A CN102145331B CN 102145331 B CN102145331 B CN 102145331B CN 201110068667 CN201110068667 CN 201110068667 CN 201110068667 A CN201110068667 A CN 201110068667A CN 102145331 B CN102145331 B CN 102145331B
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- dovetail groove
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Abstract
The invention relates to a method for improving the bonding strength of a grooved substrate and a coating, which comprises the following steps of: (a) cleaning the surface of a substrate material with an alkaline detergent; (b) lathing a dovetail groove on the surface of the substrate material, wherein all the corner parts of the dovetail groove are fillets; (c) blast sanding, and then cleaning the surface of the substrate material with compressed air; (d) coating a protective layer so that the outer surface of a workpiece is flat; (e) finish grinding the workpiece to the required size; and (f) polishing the surface of the workpiece. In the method for improving the bonding strength of the grooved substrate and the coating, provided by the invention, the dovetail groove is arranged on the surface of the substrate so that the resistance to the surface coating when dropping off the substrate from the surface coating is increased, and the bonding strength is improved; and the corner parts of the dovetail groove are smoothly transited so that the quality and the bonding strength of the coating are ensured.
Description
Technical field
The present invention relates to a kind of method that improves matrix and anchoring strength of coating, particularly a kind of method that improves trough of belt matrix and anchoring strength of coating.
Background technology
For the changeable equipment of a few thing circumstance complication, anticorrosion, anti-wear performance require very high, thus must carry out the processing such as anticorrosion and wear-resisting of necessity to its surface, with guaranteed performance.In actual use, the bond strength of matrix and its face coat plays key effect to the service life of equipment or parts, and in a single day coating comes off, and then entire equipment or parts will lose efficacy.Matrix surface processing groove, as be used for device for detecting distance of travel etc., can influence coating quality, thereby reduce matrix and the surperficial bond strength that sprays, traditional groove is rectangle or V-shape, and the rotation angle position of groove can influence coating quality, discloses the structure of a kind of rectangle and V-groove respectively as U.S. Pat 3956973A and US2004155800, the matrix under these structures and the bond strength of its face coat are lower, thereby influence the matrix life-span.
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome original trough of belt matrix and the lower deficiency of its face coat bond strength, the invention provides a kind of method that improves trough of belt matrix and anchoring strength of coating.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method that improves trough of belt matrix and anchoring strength of coating comprises following steps:
(a) clean substrate material surface with alkaline detergent;
(b) at substrate material surface Vehicle Processing dovetail groove, all rotation angle positions of dovetail groove are rounding;
(c) blasting treatment blows clean substrate material surface with compressed air after the sandblast;
(d) spraying protective layer makes the workpiece outer surface be a burnishing surface;
(e) workpiece correct grinding is machined to requires size;
(f) surface of the work is polished.
In order to guarantee bond strength and not influencing coating quality that the left tilted surface of the dovetail groove described in the step (b) and the angle α of right tilted surface are 10 °～16 °.
When being used for device for detecting distance of travel, in order to guarantee the accuracy of detection of device for detecting distance of travel, the degree of depth L of the dovetail groove described in the step (b) is 0.15mm～0.2mm.
The invention has the beneficial effects as follows that a kind of method that improves trough of belt matrix and anchoring strength of coating of the present invention is offered dovetail groove at matrix surface, increased the resistance of face coat when matrix comes off, improved bond strength; The rotation angle position rounding off of dovetail groove has guaranteed coating quality and bond strength; When the structure of using this method to make is used for device for detecting distance of travel, be positioned at the detection segment of piston rod, be used in combination, detect the piston rod stroke with the built-in device for detecting distance of travel of output pulse signal.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram of the structure made of a kind of method that improves trough of belt matrix and anchoring strength of coating of the present invention.
Fig. 2 is the schematic diagram that anchoring strength of coating is measured anchor clamps.
Fig. 3 measures hot-spraying coating bond strength sample schematic diagram.
Fig. 4 is the A-A cutaway view of Fig. 3.
Fig. 5 is a B place partial enlarged drawing among Fig. 4.
Fig. 6 is the structural representation of dovetail groove coating among the embodiment 2.
Fig. 7 is the structural representation of V-type groove in the comparative example 1.
Among the figure 1, dovetail groove, 1-1, left tilted surface, 1-2, right tilted surface; the rotation angle position of 1-3, dovetail groove, 1-4, prime coat, 1-5, protective layer; the angle of α, left tilted surface and right tilted surface, the degree of depth of L, dovetail groove, the shallow-layer thickness of L0, prime coat; 2, wear pin; 3, sprayed coating, 4, Connection Block, 5, connecting rod; 6, sample, 7, the V-type groove.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, so it only shows the formation relevant with the present invention.Following examples are the usefulness for illustrating only, and should not be interpreted as restriction of the invention process.
As shown in Figure 1, the schematic diagram of the structure made of a kind of method that improves trough of belt matrix and anchoring strength of coating of the present invention.
A kind of method for optimizing that improves trough of belt matrix and anchoring strength of coating of the present invention comprises following steps:
(a) clean substrate material surface with alkaline detergent;
(b) at substrate material surface Vehicle Processing dovetail groove 1, all rotation angle position 1-3 of dovetail groove 1 are rounding, and the left tilted surface 1-1 of dovetail groove 1 and the angle α of right tilted surface 1-2 are 10 °～16 °, and the degree of depth L of dovetail groove 1 is 0.15mm～0.2mm, and width of rebate is 2mm;
(c) blasting treatment blows clean substrate material surface with compressed air after the sandblast;
(d) spraying protective layer 1-5 makes the workpiece outer surface be a burnishing surface, protective layer thickness 〉=0.2mm;
(e) workpiece correct grinding is machined to requires size;
(f) surface of the work is polished.
It below is the bond strength method of testing.This method is applicable to the mensuration of hot-spraying coating bond strength, measures the testing machine that uses any kind that is used for tension test that satisfies static loading environment.The ability of testing machine is generally 50kN to 100kN, and precision is ± 1%.The anchor clamps that use on the testing machine have automatic adjustment function, guarantee not produce in test process eccentric load or moment of flexure to sample.Fig. 2 is that anchoring strength of coating is measured the anchor clamps schematic diagram.The adhesive that employing can make coating and antithesis test connect, its tensile strength satisfies the minimum requirements of anchoring strength of coating.Adhesive has enough viscosity, and the thickness that penetrates into coating can not arrive the coating faying face.
The computational methods of anchoring strength of coating: bond strength=peak load/sectional area.Keep two behind the gained bond strength value decimal point.
Be the 45# steel at material earlier, the bottom surface diameter is the dovetail groove 1 that the cylinder outer round surface processing of 160mm vertically is spacedly distributed, as shown in Figure 5, notch between the dovetail groove 1 bottom land width with dovetail groove 1 at interval is identical, all rotation angle position 1-3 of dovetail groove 1 are rounding, the left tilted surface 1-1 of dovetail groove 1 and the angle of right tilted surface 1-2 are 12 °, the degree of depth L of dovetail groove 1 is 0.17mm, width of rebate is 2mm, and spraying prime coat 1-4, as shown in Figure 1, matrix surface is a burnishing surface behind the spraying prime coat 1-4, and shallow-layer thickness L0 is 0.08mm, and prime coat 1-4 sprayed on material is NiCr base and NiCrAl base used for hot spraying powder composite mixture; Coating thickness is the protective layer 1-5 of 0.2mm on prime coat 1-4 surface, makes the workpiece outer surface be a burnishing surface, and material is a metal oxide ceramic.Sample is made up of matrix and mating plate, matrix and mating plate be length 38mm and wherein a bottom surface be the cuboid block of cambered surface.Coating is on matrix, and matrix and mating plate can recycle.Matrix material is consistent with the matrix material of hot-spraying coating part with the mating plate material.Fig. 3 is for measuring hot-spraying coating bond strength sample schematic diagram, and as shown in FIG., sample is taken from above-mentioned cylindrical outer ring portion, and this sample one bottom surface is the convex globoidal of φ 160mm, and another bottom surface is that size is 25
-0.2Mm * 25
-0.2The square of mm, the high L1 of sample is 38mm.Sample square bottom surface end has screwed hole, and the maximum of screwed hole degree of depth L2 is 19mm, and L3 is 12.3mm, and specimen surface and thread center's line total length perpendicularity are 0.075mm.The convex globoidal of sample is as the spraying aspect, and the spraying sample is made by the identical technology of spraying part.The faying face of mating plate and sample sprayed coating is the cancave cambered surface of φ 160mm, does not process groove on this cancave cambered surface.According to the adhesive manufacturer specification matrix is connected with mating plate, and compresses, guarantee to connect the concentricity of sample up to adhesive curing.Paper or the cloth adhesive that this sample junction is unnecessary with softness are wiped.Sample is placed on the anchor clamps, carry out the test of matrix and anchoring strength of coating.After doing two groups of tests, the gained bond strength is as shown in table 1.
Comparative example 1
Be that 45# steel, bottom surface diameter are the V-type groove 7 that the cylinder outer round surface processing of 160mm vertically is spacedly distributed earlier at material, notch between the V-type groove 7 is identical with V-type groove 7 bottom land width at interval, the left tilted surface of V-type groove 7 and the angle of right tilted surface are 40 °, the degree of depth of V-type groove 7 is 0.17mm, and the bottom land width is 2mm.Other steps make the sample and the mating plate of compare test with embodiment 1 identical step, and its spraying parameter and embodiment 1 are identical, do two groups of tests after, the gained bond strength is as shown in table 1.
Test gained data are as shown in table 1:
Adopt hot-spraying coating bond strength method of testing that anchoring strength of coating is tested, the V-shaped groove surface is ceramic coated, and its bond strength is 25～30Mpa; A kind of bond strength that improves the optimum embodiment of structure of trough of belt matrix and anchoring strength of coating of the present invention is 30～35MPa.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (2)
1. method that improves trough of belt matrix and anchoring strength of coating is characterized in that comprising following steps:
(a) clean substrate material surface with alkaline detergent;
(b) at substrate material surface Vehicle Processing dovetail groove (1), all rotation angle positions (1-3) of dovetail groove (1) are rounding; The left tilted surface (1-1) of described dovetail groove (1) is 10 °～16 ° with the angle α of right tilted surface (1-2), and degree of depth L is 0.15mm～0.2mm;
(c) blasting treatment blows clean substrate material surface with compressed air after the sandblast;
(d) spraying protective layer (1-5) makes the workpiece outer surface be a burnishing surface;
(e) workpiece correct grinding is machined to requires size;
(f) surface of the work is polished.
2. as the method for claim 1 described raising trough of belt matrix and anchoring strength of coating, it is characterized in that: the thickness 〉=0.2mm of the protective layer (1-5) described in the step (d).
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| CN 201110068667 CN102145331B (en) | 2011-03-22 | 2011-03-22 | Method for improving bonding strength of grooved substrate and coating |
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| CN 201110068667 CN102145331B (en) | 2011-03-22 | 2011-03-22 | Method for improving bonding strength of grooved substrate and coating |
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| CN107119317A (en) * | 2017-03-17 | 2017-09-01 | 邹亚静 | A kind of polycrystalline cast ingot crucible and preparation method thereof |
| CN107387751A (en) * | 2017-08-25 | 2017-11-24 | 常州液压成套设备厂有限公司 | Corrosion resistant ceramic cylinder rod |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811007A (en) * | 2005-01-24 | 2006-08-02 | 北京安东奥尔工程技术有限责任公司 | Hot spray process to form alloy coating on the surface of bidirectional protecting coupler |
| CN101456012A (en) * | 2008-12-26 | 2009-06-17 | 唐山轨道客车有限责任公司 | Painting method for high-speed motor train set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH06206043A (en) * | 1993-01-07 | 1994-07-26 | Kubota Corp | Coating method |
| US5655948A (en) * | 1995-06-05 | 1997-08-12 | Minnesota Mining And Manufacturing Company | Coater die grinding and finishing method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811007A (en) * | 2005-01-24 | 2006-08-02 | 北京安东奥尔工程技术有限责任公司 | Hot spray process to form alloy coating on the surface of bidirectional protecting coupler |
| CN101456012A (en) * | 2008-12-26 | 2009-06-17 | 唐山轨道客车有限责任公司 | Painting method for high-speed motor train set |
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| JP特开平6-206043A 1994.07.26 |
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Inventor after: Lv Weidong Inventor after: Ye Qing Inventor after: Liu Qingsong Inventor after: Zhu Qinyu Inventor after: Wang Zehua Inventor after: Chen Zhifang Inventor after: Wang Shuangyun Inventor after: Jiang Zhiping Inventor before: Zhu Qinyu Inventor before: Wang Zehua Inventor before: Chen Zhifang Inventor before: Wang Shuangyun Inventor before: Jiang Zhiping |
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Free format text: CORRECT: INVENTOR; FROM: ZHU QINYU WANG ZEHUA CHEN ZHIFANG WANG SHUANGYUN JIANG ZHIPING TO: LV WEIDONG YE QING LIU QINGSONG ZHU QINYU WANG ZEHUA CHEN ZHIFANG WANG SHUANGYUN JIANG ZHIPING |
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