CAJ | 학술논문

采用NaOH熔融混合液对废旧硬质合金表面涂层的去除进行研究。目测观察试样表面颜色变化,扫描电镜分析微观表面形貌,并通过能谱仪分析涂层表面成分。分别讨论了熔液温度与保温时间对涂层的去除效果、回收基体质量的影响。实验表明,NaOH熔融混合液可以有效地去除涂层硬质合金的表面涂层物,在700℃、40min条件下能够得到最佳去涂层效果,而不损害基体。
채용NaOH용융혼합액대폐구경질합금표면도층적거제진행연구。목측관찰시양표면안색변화,소묘전경분석미관표면형모,병통과능보의분석도층표면성분。분별토론료용액온도여보온시간대도층적거제효과、회수기체질량적영향。실험표명,NaOH용융혼합액가이유효지거제도층경질합금적표면도층물,재700℃、40min조건하능구득도최가거도층효과,이불손해기체。
This paper conducts a study on removal of the coat of discarded cemented carbide by means of molten NaOH mixed liquor. Various methods are used to observe surface, like observing the changes of sample surface color by eyes, analyzing microscopic surface texture by SEM, and analyzing the coat surface composition by EDS. This paper discusses the influence of melt temperature and soaking on effect of the removal of coat and recycle of substrate respectively. Experiments show that, molten NaOH mixed liquor can wipe off the surface coat- ing on coated cemented carbides effectively, and under the condition of 700℃ and 40 minutes, the best result of removal of coating without damaging substrate has been achieved.