钨粉局部优先重氧化行为的研究

BEHAVIOURS OF LOCAL PRIORITY REOXIDATION OF TUNGSTEN POWERA STUDY

对影响多角形钨粉优先重氧化率的三个主要工艺参数———氧化温度、氧化时间、钨粉费氏平均粒度，采用二次通用旋转组合设计方法进行了试验研究，建立了以氧化率为目标函数的数学模型，所建模型经Ｆ检验高度显著。用所建数学模型对钨粉重氧化率进行了预报，其值与实测值的误差不超过５％。对影响钨粉重氧化率的各因素进行了分析。研究结果为钨粉重氧化—氢还原法严格控制多角形钨粉氧化率的工艺提供了依据。

Oxidation temperature, oxidation time and Fisher average particle size of tungsten power were 3 key technical parameters affecting the priority reoxidation rate of polygonal tungsten power. The three technical parameters were investigated and tested using quadratic general rotating composite design method. The data obtained were processed by computers, thereby establishing a methematical model in which oxidation rate is used as target function. The F testing results show that the model has a high significance and the error between measuared value and predicated value by the model is less than 5%. All the factors affecting the reoxidation rate were analysed, providing technical basis for strictly controlling the oxidation rate of polygonal tungsten power by reoxidationhydrogen reduction method.