A kind of preparation method of metal-based self-lubricating PTFE coating with high wear resistance
A technology with high wear resistance and metal substrates, applied in the coating process of metal materials, coatings, etc., can solve the problems of melting point and crystallinity reduction, transparency increase, etc.
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Embodiment 1
[0017] The preparation method of a kind of high wear resistance metal-based self-lubricating PTFE coating that this embodiment provides, selects the stainless steel plate of length 120 centimeters, width 20 centimeters, thickness 2 millimeters, adopts general process method to spread copper powder on the steel plate One side of the stainless steel plate is then sintered at high temperature, so that the surface of the stainless steel plate is coated with a layer of metallic copper with a thickness of about 30 microns. The steel plate is used as the metal substrate, which is used in all the embodiments described in the present invention. However, the scope of the invention is not affected by the type and size of the stainless steel material and the thickness of the metallic copper coating, as these factors are not critical to the invention. Spread the pure grade PTFE on the copper coating surface of the metal substrate, and roll it to form a PTFE coating with a thickness of abou...
Embodiment 2
[0020] The preparation method of a kind of high wear resistance metal-based self-lubricating PTFE coating provided by the present embodiment is basically the same as that of Example 1, and the metal plate containing the PTFE coating is used at 340 ° C under the protection of nitrogen gas with an electron energy of 500 KeV The accelerator irradiated with an absorbed dose of 300kGy, and cooled naturally after the irradiation to obtain sample 2.
[0021] The sample 2 was subjected to the abrasion resistance test on a ring-on-disc friction and wear testing machine. The inner diameter of the stainless steel ring is 26mm and the outer diameter is 30mm. The test piece and the dual ring are roughly polished with sandpaper, then scrubbed with acetone cotton ball and dried. At room temperature, the relative sliding speed of the ring is 27 meters per minute, and the load is 200 Newtons under dry sliding sliding friction and wear, and the test time is 10 minutes. The wear of sample 2 wa...
Embodiment 3
[0023] The preparation method of a kind of high wear resistance metal-based self-lubricating PTFE coating provided in this embodiment, PTFE raw material and carbon fiber powder, graphite powder are mixed evenly according to the ratio of 80:10:10, and then paved on the metal substrate The surface of the copper coating is rolled to form a PTFE coating with a thickness of about 50 microns, and then sintered at 380° C. for 20 minutes under a nitrogen atmosphere. Part of the obtained sample was used as control sample 2, and the other part was irradiated with an accelerator with an electron energy of 1.5 MeV at 350°C under the protection of nitrogen, with an absorbed dose of 50 kGy. After the irradiation, it was naturally cooled to obtain sample 3.
[0024]The obtained control sample 2 and sample 3 were subjected to a friction resistance test on a ring-on-disc friction and wear testing machine. The inner diameter of the stainless steel ring is 26mm and the outer diameter is 30mm. T...
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Abstract
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