| ZHANG Ai-li,XU Jing-yu,XIA Chun-lei,YUAN Zhi-hua.High-temperature Wear-resistant Coatings on Surface of Special Steel by Orthogonal Optimization Experiment[J],49(10):253-259 |
| High-temperature Wear-resistant Coatings on Surface of Special Steel by Orthogonal Optimization Experiment |
| Received:October 08, 2019 Revised:October 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.10.029 |
| KeyWord:orthogonal experiment oil coating high-temperature wear resistance special steel entropy weight method |
| Author | Institution |
| ZHANG Ai-li |
Shenyang Ligong University, Shenyang , China |
| XU Jing-yu |
Shenyang Ligong University, Shenyang , China |
| XIA Chun-lei |
Shenyang Ligong University, Shenyang , China |
| YUAN Zhi-hua |
Shenyang Ligong University, Shenyang , China |
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| Abstract: |
| The work aims to improve the friction and wear performance of special steel materials under severe service conditions like high temperature, medium and low speed, etc. The surface of special steel materials with dimethicone was treated by coating preparation technology. The epoxy resin E-51 was used as the base material, and high-temperature wear- resistant materials such as expandable graphite and CaF2 were used as pigment fillers to prepare a coating suitable for oil coating on the surface of special steel. High-temperature wear, thermal weight loss rate, corrosion current density, etc. were used as the evaluation criteria, and high-temperature wear was used as the main evaluation criterion. The orthogonal optimization experiment was carried out on the basis of single factor experiment, and 9 groups of orthogonal optimization experiments were analyzed by entropy weight method. The optimization experiment results showed that when the pigment base ratio was 1.2∶1, the amount of graphite was 35%, the amount of CaF2 was 22%, and the amount of glass flakes was 18%, the high-temperature wear rate of the film was 0.97%, the weight loss rate of 200 ℃ and 400 ℃ was 5.41% and 37.84% respectively, and the corrosion current density was 1.337′10-7 A/cm2, indicating the best comprehensive performance. The other properties also met the national standards, and the alkali resistance of the film was far greater than the value stipulated by the national standard. The results of the orthogonal optimization scheme calculated by the comprehensive weighting method have obvious performance improvement, in which the high-temperature wear resistance rate is reduced from 2.5% to 0.97%, the corrosion current density is reduced from 2.61′10-7 A/cm2 to 1.337′10-7 A/cm2, and the high temperature resistance is also increased from the original 350 ℃ to 400 ℃. |
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