Green Fe-based alloy coating
An iron-based alloy and coating technology, applied in the field of surface coating materials, can solve the problems of high brittleness, high residual stress of pure iron coating, and easy oxidation of the plating solution.
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Embodiment example 1
[0015] The raw materials for the preparation of the green iron-based alloy coating include: the base material is widely used GCrl5 bearing steel, and the size is 18×10mm. The preparation steps of the green iron-based alloy coating are as follows: the end face of the sample is subjected to 80 # 、320 # 、1000 # , 2000 # Sanding with water sandpaper. After the prepared sample was rinsed, it was placed in an acetone solution and ultrasonically cleaned for 5 minutes before use. The sample after the preliminary treatment is brush-plated according to the following process: the brush-plating voltage is 10V, the brush-plating line speed is 6-12m / min, and the brush-plating time is 10min, (the pH value of the plating solution is 1.5, and the temperature of the plating solution is 30 ℃). In the vacuum furnace, heat up to the set temperature with the furnace, keep it warm for 1 hour, cool down to 150°C with the furnace, and take it out for air cooling. The test temperatures were 450°C...
Embodiment example 2
[0017] On the basis of the Fe-W coating, the Fe-W-Cu coating is formed with Cu as the alloying element. The surface of the coating presents a "micro-cauliflower head" shape. Compared with the Fe-W coating, the aggregates have been significantly refined. The coating is well bonded to the substrate, and there are no structural defects such as pores and microcracks in the coating, and the structure is more Uniform and dense. It shows that when Cu element participates in the co-deposition of the coating, there is an obvious thinning effect on the coating, which reduces the growth stress of the coating. The deposition efficiency of the coating is equivalent to that of the Fe-W coating, which shows that the introduction of Cu element does not affect the deposition efficiency of the coating. In the coating, only the diffraction peaks representing the crystal orientations of α-Fe appear, and the intensity and width of the diffraction peak of the Fe-W coating are similar to those of t...
Embodiment example 3
[0019] The hardness of the three coatings is significantly higher than that of the substrate GCrl5, and the hardness of the alloyed coating is further improved after the addition of W and Cu elements, close to 700HV, which can meet the hardness requirements of most engineering parts. The wear amount of the Fe coating is higher than that of the substrate. The wear mechanism of Fe coating is abrasive wear. The Fe coating has high hardness and high brittleness, and is prone to brittle fracture and shedding in the process of friction and wear. After adding W element, the hardness of the coating is improved due to the dispersion strengthening of W, but due to the existence of the hard phase, it will only increase the possibility of the brittle detachment of the hard phase of the Fe coating, and cannot improve the tribological properties of the Fe coating. , and the Fe-W coating itself is not dense, so it leads to a greater amount of wear during the friction process. When Cu eleme...
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Abstract
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