P復合鍍層。分析了在不同熱處理溫度下加工的不同SiCP濃度Ni-P-SiCP復合鍍層的表面形貌和相結(jié)構(gòu)。研究了Ni-P-SiCP復合鍍層的顯微硬度、耐腐蝕性和耐磨性。結(jié)果表明，Ni-P-SiCP復合鍍層呈現(xiàn)花椰菜狀形貌。增加SiCP濃度可以減小胞狀物的尺寸。顯微硬度和耐腐蝕性隨著SiCP濃度的增加而先增加后降低。當SiCP濃度為5 g/L時，最大顯微硬度和腐蝕電位分別為7379 MPa和-0.363 V。Ni-P-SiCP復合鍍層呈現(xiàn)非晶態(tài)結(jié)構(gòu)，漫散衍射峰的寬度隨著SiCP濃度的增加而變窄。這表明SiCP抑制了P的沉積，促進了微晶轉(zhuǎn)變。在350 ℃下熱處理后，Ni-P-SiCP復合鍍層結(jié)晶，導致Ni3P相沉淀。在400 ℃下熱處理1 h可使結(jié)構(gòu)最大化。鍍層中Ni3P析出強化相和SiCP彌散強化相的協(xié)同作用，促進了胞狀組織的致密化，從而獲得了最佳的顯微硬度（13 828 MPa）、最佳的耐腐蝕性（-0.277 V）和優(yōu)異的耐磨性。磨損機制以微切削磨料磨損為主，伴有輕微的粘著磨損和氧化磨損。;Ni-P-SiCP coatings were deposited on 42CrMo steel by electroless plating. The surface morphologies and phase structures of the Ni-P-SiCP coatings processed under different SiCP concentrations at different heat treatment temperatures were analyzed. The microhardness, corrosion resistance, and wear resistance of the Ni-P-SiCP coatings were studied. Results show that Ni-P-SiCP coatings exhibit cauliflower-like morphology. Increasing the SiCP concentration can reduce the size of cellular structure. The microhardness and corrosion resistance are initially increased and then decreased with the increase in SiCP concentration. The maximum microhardness and corrosion potential are 7379 MPa and -0.363 V, respectively, when the SiCP concentration is 5 g/L. The Ni-P-SiCP coatings exhibit an amorphous structure, and the width of the diffuse diffraction peak becomes narrower with the increase in SiCP concentration. It is suggested that SiCP inhibits the deposition of P and promotes the microcrystalline transformation. After heat treatment at 350 °C, the Ni-P-SiCP coatings are crystallized, resulting in the precipitation of Ni3P phase. Heat treatment at 400 °C for 1 h maximizes the structure. The synergistic effect of the Ni3P precipitate phase and SiCP dispersion phase promotes the densification of the cellular structure, leading to the optimal microhardness (13 828 MPa), optimal corrosion resistance (-0.277 V), and excellent wear resistance. The wear mechanism is dominated by micro-cutting abrasive wear with slight adhesive and oxidative wear."/>
P復合鍍層;熱處理;耐腐蝕性;磨損機理;42CrMo steel;Ni-P-SiCP composite coatings;heat treatment;corrosion resistance;wear mechanism"/>