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高速钢工具焊接、锻造与模锻的毛坯在盐浴中的循环退火是热处理新方法中最有发展前途的方法,它可将退火过程的时间从20～30小时缩短到2～6小时。在毛坯尺寸不大(直径小于25毫米)的单件或小批量生产中以及工具重新淬火前采用退火作为中间工序时,应用无平台循环退火是合理的,无平台循环退火在温度为885(?)675℃的同一盐浴中进行,上、下限温度均不需要保温。在大批量生产的条件下,文献[1]提出了小平台循环退火,即:退火在温度分别为850
High Speed Steel Tooling Recycling of the blank for welding, forging and forging in a salt bath is one of the most promising ways in the new heat treatment process, reducing the annealing time from 20 to 30 hours to 2 to 6 hours. In single-part or small-batch production with small blank sizes (less than 25 mm in diameter) and with annealing as an intermediate process prior to re-quenching the tool, it is reasonable to apply a plateau-less anneal without a plateau anneal at a temperature of 885 ° C ) 675 ℃ in the same salt bath, the upper and lower temperature does not require insulation. In mass production conditions, literature [1] proposed a small platform cyclic annealing, namely: annealing at temperatures of 850