钢的低温渗硼剂的研制

Study on Low Temperature Boronizing Supply Agent

在经过初步选择渗剂的基础上 ,采用正交试验优化选择研制了低温渗硼剂的最佳配方 .通过金相分析、显微硬度测定等实验 ,分析了低温渗硼层的显微组织、硬度分布 .结果表明 ,正交试验能有效减少试验次数 ,获得最佳渗剂配方 ;该低温渗硼剂能较好地实现低温渗硼 ,渗硼层呈梳齿状 ,致密、疏松孔洞少 ,硼化物前沿没有明显的过渡区 ,也无明显的富碳区 ;渗硼层显微硬度梯度比较平缓 ,渗层与基体结合较好 .

After selecting a better pack material, it deals with orthogonal optimum seeking of a best composition of low temperature pack boriding medium. By examinations of metallograph, microhardness, X-ray diffraction, the author determines the boriding layer's microstructure and hardness curve. The result shows that the orthogonal optimum seeking can reduce the time for experiment and obtain the best supply agent, and the low temperature boronizing supply agent is effective, the boriding layer is tooth-like, but it becomes compact in texture and less loose and porous, in the front of boriding layer there is no obvious transition region and full of carbon region. Moreover, the gradient of microhardness of the boriding layer is quite gently, the combination of the boriding layer with basic structure is better.