Surface treatment method for metal stamping die
A surface treatment and metal stamping technology, applied in heat treatment furnaces, heat treatment equipment, metal material coating processes, etc., can solve the problems of short service life of molds, laborious maintenance, neglecting the importance of surface treatment, etc., to improve service performance and life. , the effect of improving thermal fatigue life and thermal wear resistance
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[0015] Example 1
[0016] A method for surface treatment of a metal stamping die includes the following steps:
[0017] (1) After heating the stamping die to 500°C, immediately immerse it in the mixed infiltration liquid at a temperature of 50°C. The content of iron boride in the mixed infiltration liquid is 0.15 g / kg and the content of silicon nitride is 0.20 g / kg. The sodium chloride concentration is 0.5 g / kg, the immersion time is 30 minutes, and the vibrator is used to continuously vibrate and mix the permeate during the immersion process;
[0018] (2) Take out the mold after the infiltration treatment, dry it at 70°C, put it in a heating furnace and heat it to 450°C, keep it for 3 hours, the heat-retained mold undergoes two low-temperature tempering treatments, and the first treatment time is After 5 seconds, quickly reduce the temperature of the billet to 300°C, and then transfer it to a low-temperature box-type heating furnace. Set the temperature in the box to 260°C. After s...
Example Embodiment
[0023] Example 2
[0024] A method for surface treatment of a metal stamping die includes the following steps:
[0025] (1) After the stamping die is heated to 550°C, it is immediately immersed in the mixed infiltration liquid at a temperature of 55°C. The iron boride content in the mixed infiltration liquid is 0.18 g / kg and the silicon nitride content is 0.25 g / kg. The sodium chloride concentration is 0.6 g / kg, the immersion time is 35 minutes, and the vibrator is used to continuously vibrate and mix the permeate during the immersion process;
[0026] (2) Take out the mold after the infiltration treatment, dry it at 80°C, put it in a heating furnace and heat it to 500°C for 3.5 hours. The insulated mold undergoes two low-temperature tempering treatments. The first treatment time is In 8 seconds, the billet temperature is rapidly reduced to 320℃, and then transferred to the low-temperature box heating furnace, set the temperature in the box to 270℃, and after stagnation for 2 minute...
Example Embodiment
[0031] Example 3
[0032] A method for surface treatment of a metal stamping die includes the following steps:
[0033] (1) After heating the stamping die to 600°C, immediately immerse it in the mixed infiltration liquid at a temperature of 60°C. The content of iron boride in the mixed infiltration liquid is 0.20 g / kg and the content of silicon nitride is 0.30 g / kg. The sodium chloride concentration is 0.8 g / kg, the immersion time is 40 minutes, and the vibrator is used to continuously vibrate and mix the permeate during the immersion process;
[0034] (2) Take out the mold after infiltration treatment, dry it at 90°C, put it in a heating furnace to heat to 550°C, keep it warm for 4 hours, the heat-retained mold undergoes two low-temperature tempering treatments, and the first treatment time is In 10 seconds, quickly reduce the billet temperature to 350°C, and then transfer it to a low-temperature box-type heating furnace, set the temperature in the box to 280°C, remove it after 3 m...
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