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

WANG Jia; YANG Quanyi; WANG Juan; LIU Xiangwei; BU Mingzhe; LI Ye; JIA Yuzhen

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Research on the microstructure and annealing cooling mode of bimetal hacksaw blades
Vol. 49, Issue 8, Pages: 99-103(2019)
DOI：

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WANG Jia, YANG Quanyi, WANG Juan, et al. Research on the microstructure and annealing cooling mode of bimetal hacksaw blades. [J]. 49(8):99-103(2019)
DOI：

WANG Jia, YANG Quanyi, WANG Juan, et al. Research on the microstructure and annealing cooling mode of bimetal hacksaw blades. [J]. 49(8):99-103(2019) DOI：

摘要

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。

Abstract

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.

关键词

双金属带锯条退火冷却曲线焊缝硬度

Keywords

bimetal hacksaw bladesannealcooling curveweld hardness

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Relationship between the criterion of crack initiation site for high-strength steel and the weld strength matching