【摘要】：目的提高316L不銹鋼表面的硬度及耐磨性能。方法采用磁控濺射法在316L不銹鋼表面制備Ni-Ti合金薄膜,并通過納米壓入法對316L不銹鋼表面、Ni-Ti合金薄膜和Ni-Ti合金材料的力學(xué)性能進(jìn)行測試,分析不銹鋼基Ni-Ti薄膜的耐磨性能。應(yīng)用有限元反演分析方法求解基體和薄膜的彈塑性冪本構(gòu)關(guān)系。結(jié)果316L不銹鋼與Ni-Ti合金抵抗載荷的能力較弱,但316L不銹鋼表面Ni-Ti薄膜抵抗外加載荷的能力較強(qiáng),且抵抗塑性變形的能力得到強(qiáng)化。Ni-Ti薄膜、316L不銹鋼基體和Ni-Ti合金的硬度分別為8.2795、5.2405、2.9498 GPa,薄膜的硬度明顯大于基體和Ni-Ti合金,說明Ni-Ti薄膜使得316L不銹鋼的耐磨性顯著提高。薄膜的彈性性能較基體與Ni-Ti合金有明顯優(yōu)勢。為研究薄膜的彈塑性性能,建立ABAQUS二維有限元模型,考慮Berkovich壓頭和試樣之間摩擦系數(shù)為0.16,通過納米壓入實(shí)驗(yàn)和有限元分析的對比,反演分析分別計(jì)算得到基體和薄膜的特征應(yīng)力、特征應(yīng)變、應(yīng)變強(qiáng)化因子,繼而確定初始屈服應(yīng)力,得到Ni-Ti合金薄膜和316L不銹鋼基體的彈塑性冪本構(gòu)關(guān)系。結(jié)論 Ni-Ti薄膜具有良好的力學(xué)特性,使316L不銹鋼表面的硬度顯著提高,因此有效提高了不銹鋼的耐磨性能。
[Abstract]:Objective to improve the hardness and wear resistance of 316L stainless steel surface. Methods Ni-Ti alloy films were prepared on the surface of 316L stainless steel by magnetron sputtering. The mechanical properties of Ni-Ti alloy films and Ni-Ti alloy materials on 316L stainless steel were measured by nano-indentation method, and the wear resistance of Ni-Ti films on stainless steel substrates was analyzed. The finite element inversion method is used to solve the elastoplastic power constitutive relation of substrate and thin film. Results the ability of 316L stainless steel and Ni-Ti alloy to resist the load was weak, but the ability of Ni-Ti film on the surface of 316L stainless steel to resist the external load was stronger than that on the surface of 316L stainless steel. The hardness of 316L stainless steel substrate and Ni-Ti alloy were 8.2795 ~ 5.2405 ~ 2.9498 GPa. the hardness of the film was obviously higher than that of the substrate and Ni-Ti alloy, which indicated that the wear resistance of 316L stainless steel was significantly improved by Ni-Ti film. The elastic properties of the film are superior to that of the substrate and Ni-Ti alloy. In order to study the elastoplastic properties of the film, the ABAQUS two-dimensional finite element model was established. The friction coefficient between the Berkovich head and the specimen was 0.16. The comparison between the nano-indentation experiment and the finite element analysis was carried out. The characteristic stress, characteristic strain and strain strengthening factor of substrate and film were calculated by inverse analysis, then the initial yield stress was determined, and the elastoplastic power constitutive relation of Ni-Ti alloy film and 316L stainless steel substrate was obtained. Conclusion the Ni-Ti film has good mechanical properties, and the hardness of 316L stainless steel surface is improved significantly, so the wear resistance of stainless steel is improved effectively.
【作者單位】： 太原理工大學(xué)應(yīng)用力學(xué)與生物醫(yī)學(xué)工程研究所;太原理工大學(xué)力學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金(11172195)~~
【分類號】：TG174.444

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