化学镀/电弧喷涂复合材料模具制备技术研究

【作者】 沈献民；

【导师】 张恒；

【作者基本信息】 郑州大学 ， 材料学， 2004， 硕士

【摘要】 本文采用电弧喷涂与化学复合镀相结合的方法制造金属基复合材料模具型腔，并通过浇铸颗粒增强树脂基复合材料和增加金属钢板外壳进行强化。研究了化学复合镀过程中五种因素：温度(℃)、pH值、SiC添加量(g/L)、稳定剂浓度(mg/L)、硫酸镍浓度(g／L)对化学复合镀沉积速率的影响，同时分析了以上五因素对耐磨性能的影响。采用正交试验方法对耐磨性化学复合镀Ni-P／SiC中具有代表性的五种因素进行了优化，得出了温度89℃、pH值5.1、SiC添加量6g/L、稳定剂浓度1.0mg/L及硫酸镍浓度32g/L的最佳方案。在电弧喷涂制造模具型腔的研究过程中，得出了金属铝丝材合理的喷涂工艺参数以获得均匀致密的喷涂层和较高的模具精度。随后采用热处理的方法提高电弧喷涂层与复合镀层的结合强度，获得350℃加热、1小时保温后随炉冷却的热处理工艺参数。 最后，采用以上试验所获得的各参数制造出复合材料化学试剂瓶模具，并采用有限元对复合材料模具散热性、强度进行了分析。 研究表明将化学复合镀与电弧喷涂制模技术结合起来，不仅可以大大提高模具的耐磨性能，延长其使用寿命，而且可以降低制模成本，缩短制模周期，是一项具有很好发展前景的快速模具制造技术。更多还原

【Abstract】 To manufacture metal matrix composites mold cavity by integrating Electric arc spraying with composite electroless plating , to strengthen the mold by filling granules reinforced resin matrix composites and to back up the composites mold by using steel plate were presented in this paper. In the process of composite electroless plating, the effects on deposit velocity of five factors including temperature( C), pH value, SiC content (g/L) , stabilizer concentration (mg/L) and NiSO4 6H2O concentration (g/L) were studied. Five representative factors were optimized in wear resistance Ni-P/SiC composite electroless plating through orthogonal test method. The optimum combination of the five factors is it follows , temperature 89 C, pH value 5.1, SiC content 6g/L, stabilizer concentration 1.0mg/L and NiSO4 6H2O concentration 32g/L. The effects of each factor on wear resistance were analyzed and tested. While mold cavity was produced with electric arc spraying equipment, reasonable spraying parameters of Al to get uniform and compact layer as well as an accurate inner surface were obtained. Then by using heat treatment to increase the adhesion of metal spraying and composite electroless plating layer, the heat treatment technological parameter of 350 C, Ihour heat preservation then furnace cooling was achieved.Finally, by using the parameters previously mentioned one composites plastic bottle mold was made. And by using FEM(finite element method) the thermal conductivity and strength of the composite mold were analyzed.The study shows the method combining composite electroless plating with metal spraying mold making is not only to increase the wear resistance and to prolong operating life of composites mold, but to cut mold making cost and to shorten mold making cycle time as well. And it is also a rapid tooling with a bright future.更多还原