双金属带锯条组织与退火冷却方式影响研究

Research on the microstructure and annealing cooling mode of bimetal hacksaw blades

采用大型钟罩式退火炉,研究双金属带锯条焊后800℃温度退火后,不同的退火冷却工艺对带锯组织及硬度的影响。结果表明,在20℃/h(平均)随炉冷却的速度范围内以及出炉罐温度在540~650℃范围内,双金属带锯条焊缝、齿背材硬度和金相组织均对冷却速度和出炉温度不敏感,说明双金属带锯在退火过程中的冷却方式有较大的调整空间。

By using the large bell type annealing furnace,the influence of different annealing cooling procedures on the microstructure and hardness of hacksaw blades after the 800℃temperature annealing of bimetal hacksaw blades are systematically studied.The results show that in a furnace cooling speed range of 20℃/h(average)and discharging temperature range of 540~650℃,the weld,saw teeth back material hardness and metallographic structure of bimetal hacksaw blades are not sensitive to the cooling rate and discharging temperature,which shows that the cooling mode has a large adjustment space in the annealing process of bimetal hacksaw blades.