Method for testing mechanical properties of thermal spraying coating
A test method, thermal spraying technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, scientific instruments, etc., can solve the problems of matrix mechanical property interference and inability to accurately characterize the macroscopic comprehensive mechanical properties of materials, etc. The effect of achieving good mechanical performance evaluation indicators
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Embodiment 1
[0031] For the flow chart of the method for eliminating the interference of the substrate on the thermal spray coating mechanical property test provided by this embodiment, please refer to figure 1 . The test methods include:
[0032] In step S1, an amorphous-ceramic composite coating is prepared by plasma spraying on the surface of the low-carbon steel Q235 substrate, and the substrate and the substrate + coating are heat treated at 900° C. for 12 hours.
[0033] Step S2, perform the following steps on the substrate + coating (ctsub) and substrate (sub) figure 2 For the three-point bending test of the coating under the action of tensile stress shown in a, set the pressing speed of the three-point bending equipment to 0.01mm / min, stop the test until the coating produces macroscopic cracks, and obtain the load-displacement curve during the test ( see image 3 ).
[0034] Step S3, perform function fitting on the load-displacement curve obtained by three-point bending, and o...
Embodiment 2
[0058] For the flow chart of the method for eliminating the interference of the substrate on the thermal spray coating mechanical property test provided by this embodiment, please refer to figure 1 . The test methods include:
[0059] In step S1, a NiAl alloy coating is prepared by spraying on the surface of the plastic substrate by arc spraying technology.
[0060] Step S2, perform the following steps on the substrate + coating (ctsub) and substrate (sub) figure 2 For the three-point bending test of the coating under compressive stress shown in b, set the pressing speed of the three-point bending equipment head to 1mm / min, stop the test until the coating produces macroscopic cracks, and obtain the load-displacement curve during the test.
[0061] Step S3, performing function fitting on the load-displacement curve obtained by three-point bending to obtain a fitting function equation P(x) of the curve.
[0062] In step S4, the mechanical contribution rate of the coating per...
Embodiment 3
[0064] For the flow chart of the method for eliminating the interference of the substrate on the thermal spray coating mechanical property test provided by this embodiment, please refer to figure 1 . The test methods include:
[0065] In step S1, a NiCoCrAl+YSZ alloy coating is prepared by spraying on the surface of the nickel-based superalloy substrate by supersonic flame spraying technology.
[0066] Step S2, perform the following steps on the substrate + coating (ctsub) and substrate (sub) figure 2 For the three-point bending test of the coating under compressive stress shown in b, set the pressure head of the three-point bending equipment at a pressing speed of 0.1mm / min, stop the test until the coating produces macroscopic cracks, and obtain the load-displacement curve during the test.
[0067] Step S3, performing function fitting on the load-displacement curve obtained by three-point bending to obtain a fitting function equation P(x) of the curve.
[0068] In step S4...
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Abstract
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