刀具发蓝（The cutting tool blue）.doc

刀具发蓝（The cutting tool blue） 50% + 15% sodium nitrate, 15% sodium hydroxide in the iron water container of the communist party of China after cooked to 158 degrees Celsius in the grinding white (shot blasting, polishing, pickling) tool for 15 to 25 minutes, remove to rinse after use 5% soap water (increase) saponification membrane for 10 minutes remove oil to dry. This is black, or blue, or black QBGJ/HM - 02-019-2009 The surface hair blue exercise routine 1 scope This procedure provides the specific operation method for the blue treatment of parts surface during the production process. This operation procedure is applicable to the basic hair blue treatment of all parts manufactured by the company; Suitable for steel parts. Normative reference files Three requirements The surface color is uniform after the parts hair blue treatment, the rust - resistant oxide film has a strong adhesion. 4 process flow Cleaning, washing, washing, washing, saponification, washing and cooking oil 5 process specifications 5.1 in addition to the oil The parts that are machined, because of the more oil pollution on the surface, the oil removal must be carried out before bluing. The composition and technological parameters of the chemical removal solution are shown in table 1. Serial number solution composition g/L / ℃ temperature No less than time/min NaOH (caustic soda) Na2CO3 (soda) Na3PO4 (trisodium phosphate) 30 ~ 50, 30 ~ 50, 30 ~ 40, 80, 10 ~ 20 2 60 ~ 70 20 ~ 25 30 ~ 40 80 10 ~ 20 Table 1 chemical degreasing composition and technological parameters 5.1.1 preparation of oil removal solution Start by injecting two-thirds of the water in the oil tank, dissolve the sodium hydroxide, and then add the other medicine slowly, then add the remaining 1/3 water and stir well. 5.1.2 oil removal process specification In addition to oil solution, it should be kept in a slightly boiling state. In addition to oil, oil should be used regularly to remove oil from the surface of the solution, and clea