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利用自制的密闭氮化系统研究不同制备条件的锰球的氮化反应.考察锰粉粒度、成球压力和黏结剂添加量对氮化反应的影响,并测量锰球氮化过程中实时增重和温度曲线.实验结果表明:锰粉粒度由16~40目变成60~80目时,球心温度到达峰值的时间由164 s缩短为101 s,球心最大温升由147℃增至233℃,氮化1 h的转化率由90.81%增至93.64%;成球压力由266 MPa增至443 MPa,球心峰值温度将提前89 s到达,球心最大温升将提高22℃,氮化1 h的转化率由91.59%增至94.92%;黏结剂添加量由1 g增至3 g,氮化1 h的转化率由92.90%降至89.80%;正态对数分布的概率密度函数可用来近似拟合转化速率与时间的关系.
The nitridation reaction of manganese balls with different preparation conditions was studied by self-made closed nitriding system.The effects of the particle size of manganese powder, the pressure of ball formation and the addition amount of binder on the nitriding reaction were investigated and the effects of real-time weight gain And the temperature curve.The experimental results show that when the particle size of manganese powder is changed from 16 to 40 meshes to 60 to 80 meshes and the peak temperature of the sphere center is shortened from 164 s to 101 s and the maximum temperature of the sphere center is increased from 147 ℃ to 233 ℃, the conversion rate of 1 h nitriding increased from 90.81% to 93.64%, the pressure of ball formation increased from 266 MPa to 443 MPa, the peak temperature of the sphere center reached 89 s earlier, the maximum temperature of the sphere center increased by 22 ℃, 1 h increased from 91.59% to 94.92%, the amount of binder increased from 1 g to 3 g, and the conversion rate from 1 hour to 89.80% after 1 h nitriding. The probability density function of normal logarithm distribution was available To approximate the relationship between the fitting rate and time.