Rapid phosphating process for die steel surface

The invention discloses a rapid phosphating process for a die steel surface. The process is characterized in that a phosphating solution is composed of 12-15 g/L of Zn(H2PO4)2, 25-29 g/L of Na(NO3)2 and 0.1-0.25 g/L of ZnO; the total acidity of the phosphating solution is 15-20, the free acidity of the phosphating solution is 2-3, the phosphating temperature is 60-75 DEG C, and treatment time is 3-6 min. According to the rapid phosphating process for the die steel surface, the film forming time is short, a formed film is uniform in thickness, the using performance of die steel can be improved, and the service life of the die steel can be prolonged. 本发明公开了种模具钢表面的快速磷化工艺，其特征在于，该磷化液由配方由12-15g/L的Zn（H2PO4)2，25-29g/L的Na（NO3)2，0.1-0.25g/L的ZnO组成；所述磷化液总酸度15-20点，磷化液游离酸度2-3点，磷化温度60-75℃，处理时间？3-6min。本发明的种模具钢表面的快速磷化工艺，其成膜的时间短，成膜厚度均匀，能提高模具钢使用性能，延长使用寿命。