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为了使模具表面得到强化,从而达到提高模具的使用寿命,保证产品质量的目的,从1985年开始,我厂研究应用模具渗铌新工艺,收到了显著的效果,下面介绍该工艺的一些基本情况。一、渗铌处理机理渗铌处理是在硼砂盐浴中进行的。硼砂盐浴的主要成分由硼砂、氧化铌和铝粉组成。硼砂(Na_2B_4O_7·10H_2O)熔点878℃,沸点1570℃,化学性能稳定熔融后进行如下分解:Na_2B_4O_7(?)Na_2O+2B_2O_3
In order to strengthen the mold surface, so as to achieve the purpose of improving the service life of the mold and ensuring the quality of the products, we started to study the new technology of mold infiltration niobium since 1985 and received some remarkable results. Here are some basic information of the process . A niobium treatment mechanism Niobium treatment is carried out in the borax salt bath. The main component of the borax salt bath consists of borax, niobium oxide and aluminum powder. Borax (Na_2B_4O_7 · 10H_2O) has a melting point of 878 ° C and a boiling point of 1570 ° C. The chemical properties of the borax are as follows: Na_2B_4O_7 (?) Na_2O + 2B_2O_3