how to do the blueing surface by the heating treatment
how to do the blueing surface by the heating treatment
Fristly,it is protected by increasing ammonia decomposition protective atmosphere in the quenched and tempered's furnace.and the quenching furnace is 0.4-0.7m3/h,and the tempered's furnace is 0.4-0.6m3/h,which is made the spring steel bright when quenching and tempering,and then it is processing test in the blueing furnace.
Secondly it is choose the main product DIN CK67 to be blueing testing,experiment with the size(thickness&width):0.3-1.0mm*60-120mm,it is in order to find the regularity of blueing,and improve the process blueing.
Thirdly ck67/C67/C67S,0.4*90mm,it is made the steel strips' surface bright by using ammonia decomposition protective atmosphere hardened and tempered.it has different blueing temperature process test in the blueing furnace.it is found that the color change is different between the temperature with 370℃ and when the temperature more than 440℃.the result is that,the blueing times with the temperature more than 440℃.the color change is white----yellow----purple---dark blue---baby blue---light blue green----yellow white. and if the temperature with more than 370℃,it is that white----yellow---grey black-----blue+red-----nature blue-----light blue green----yellow white.different blueing temperature is corresponding to the blueing time.
