(無(wú)錫職業(yè)技術(shù)學(xué)院 機(jī)械技術(shù)學(xué)院，無(wú)錫 214121)
摘 要: 在鎢絲增強(qiáng)鎳的電鑄制造過(guò)程中，利用柔性壓緊輪補(bǔ)充電沉積區(qū)域的電鑄液，并摩擦與擠壓復(fù)合電鑄層，以提高鎢絲-鎳復(fù)合電鑄層的抗拉強(qiáng)度。研究柔性受壓條件對(duì)復(fù)合電鑄層表面形貌、斷口形貌和抗拉強(qiáng)度的影響。結(jié)果表明：柔性壓緊輪對(duì)復(fù)合電鑄層的摩擦與擠壓作用顯著減少表面孔隙并細(xì)化晶粒；其輸送電鑄液的作用能夠防止復(fù)合電鑄層內(nèi)部出現(xiàn)空洞；柔性受壓條件對(duì)復(fù)合電鑄層抗拉強(qiáng)度的提升效果隨著鎢絲體積分?jǐn)?shù)的增加而越發(fā)顯著，當(dāng)鎢絲體積分?jǐn)?shù)為50%時(shí)，抗拉強(qiáng)度提升18%，達(dá)到1558 MPa。
關(guān)鍵字: 柔性受壓；電鑄；抗拉強(qiáng)度；鎢絲；鎳
（School of Mechanical Technology, Wuxi Institute of Technology, Wuxi 214121, China）
Abstract:During the electroforming of W fiber-Ni composites, the flexible compression wheel was applied to replenish the electrodeposition region with fresh solution and polish the deposition, which leads to the composites with higher tensile strength. The influences of flexible compression on the surface morphology, fracture morphology and tensile strength of the electroformed W fiber-Ni composites were investigated. The results show that the surface porosity and grain size of the depositions are reduced due to the friction and extrusion from the flexible compression wheel; the effect of solution supplement by the flexible compression wheel can prevent the generation of the internal voids; flexible compression can obviously increase the tensile strength of the composite, especially at high W fiber volume fraction. When the volume fraction of the W fiber is 50%, the W fiber-Ni composite electroformed with flexible compression shows the highest tensile strength of 1558 MPa, which is improved by 18%.
Key words: flexible compression; electroforming; tensile strength; W fiber; nickel
