Oxygenic steam bluing method for corrosion-resistant spring steel
A spring steel, corrosion-resistant technology, applied in the bluing field of oxygen-containing steam, can solve the problems of poor bonding force and wear resistance, and achieve the effects of high adhesion, economic stability and low energy consumption
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Embodiment 1
[0021] The spring steel is pre-treated by pickling and dephosphorization in advance to obtain a clean surface. Then first place the spring steel into the annealing furnace, pump the annealing furnace to vacuum, and feed 80% N 2 and 20%H 2 The mixed gas is used as the annealing medium, the spring steel is heated to an annealing temperature of 500°C, and 90% N 2 and 10%H 2 O mixed gas is used as the blue medium. The dew point temperature is 10°C, and the holding time at the annealing temperature is 20 minutes.
Embodiment 2
[0023] The spring steel is pre-treated by pickling and dephosphorization in advance to obtain a clean surface. Then first place the spring steel into the annealing furnace, pump the annealing furnace to vacuum, and feed 80% N 2 and 15%H 2 The mixed gas is used as the annealing medium, the spring steel is heated to an annealing temperature of 500°C, and 90% N 2 and 10%H 2 O mixed gas is used as the blue medium. The dew point temperature is 10°C, and the holding time at the annealing temperature is 20 minutes.
Embodiment 3
[0025] The spring steel is pre-treated by pickling and dephosphorization in advance to obtain a clean surface. Then first place the spring steel into the annealing furnace, pump the annealing furnace to vacuum, and feed 80% N 2 and 20%H 2 The mixed gas is used as the annealing medium, the spring steel is heated to an annealing temperature of 700°C, and 90% N 2 and 10%H 2 O mixed gas is used as the blue medium. The dew point temperature is 10°C, and the holding time at the annealing temperature is 20 minutes.
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