一般折断的锯条,锯齿部分还是相当锐利的;如果把锯条折断部分的60公厘处(图1)加以局部退火(硬度由原来的 R_C 61～64降到 H_B250以下),打个眼,重新装起来使用,这样便可以节约一批报废的锯条。我厂曾经采用这种办法处理了一批折断的锯条,都收到很好的效果。起初,我们采用普通的退火方法,先将锯条要退火的一段垂直地放在870～880℃的盐浴中加热(图2),保温20分钟后,把它放在 Generally broken blade, serrated part is still quite sharp; if the saw blade breaking part of the 60 km (Figure 1) to local annealing (hardness from the original R_C 61 ~ 64 down H_B250 below), eye-catching, re-installed Up and use, so that you can save a number of scrapped saw blade. I plant this approach has been used to deal with a number of broken saw blade, have received very good results. At first, we use the ordinary annealing method, the first section of the saw blade to be annealed in a vertical salt bath heated 870 ~ 880 ℃ (Figure 2), incubated for 20 minutes, put it on