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快走丝线切割工作液组成包括水、基础油、表面活性剂、爆炸剂、防锈剂、缓蚀剂、极压剂、防腐剂等,而碳酸钠是一种常用的防锈剂。本文采用实验研究与理论分析相结合的方法,通过硬质合金的浸泡实验与实际切割实验,借助扫描电子显微镜(SEM)、X射线能谱仪(EDX)等设备,研究了碳酸钠对硬质合金中WC浸出的影响。研究结果表明:在硬质合金的线切割加工过程中,由于高温的作用,硬质合金表面的WC会由于氧化作用而生成三氧化钨,加入碳酸钠后,溶液为碱性环境,易生成钨酸根离子,三氧化钨的氧化溶解程度加剧。三氧化钨脱落之后,内层的WC继续氧化溶解促使了W的浸出,从而降低了硬质合金的硬度、耐磨性和使用寿命。在工作液中添加硼砂、油酸三乙醇胺和苯并三氮唑能够有效抑制WC的氧化溶解,减少W的浸出。
Fast cutting wire cutting fluid composition, including water, base oil, surfactants, explosives, rust inhibitors, corrosion inhibitors, extreme pressure agents, preservatives, etc., and sodium carbonate is a commonly used anti-rust agent. In this paper, a combination of experimental and theoretical analysis was used to study the effect of sodium carbonate on the hardness Effect of WC Leaching in Alloys. The results show that during the wire cutting of cemented carbide, due to the effect of high temperature, WC on the cemented carbide surface will form tungsten trioxide due to oxidation and after adding sodium carbonate, the solution will be alkaline and will easily generate tungsten Acid ions, tungsten oxide oxidation degree of dissolution. Tungsten trioxide off, the inner layer of WC continue oxidation and dissolution prompted the W leaching, thereby reducing the hardness of the cemented carbide, wear resistance and service life. Adding borax, oleic acid triethanolamine and benzotriazole into the working solution can effectively inhibit the oxidation and dissolution of WC and reduce the leaching of W.