RE co-permeating surface anticorrosion treatment process of high-speed railway track fastener
A high-speed railway and surface treatment technology, applied in the direction of solid-state diffusion coating, metal material coating process, coating, etc., can solve the problems that other mechanical properties are difficult to meet the requirements, the comprehensive performance cannot meet the requirements, and the hardness of the surface anti-corrosion layer is low, etc. problems, to achieve the effect of high anti-atmospheric rainwater corrosion performance, increased compactness, and good anti-corrosion performance
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specific Embodiment approach 1
[0015] Specific Embodiment 1: The surface treatment method of rare earth co-infiltration and anticorrosion of high-speed railway rail fasteners in this embodiment is as follows: raise the temperature of the low-temperature gas nitriding furnace to 570-680 ° C, and then place the Q235A low-carbon steel workpiece in the low-temperature gas In the nitriding furnace, after the temperature of the workpiece reaches the temperature in the furnace, methanol is introduced to exhaust the air in the furnace. After 30 to 60 minutes, the methanol or ethanol solution containing the rare earth infiltrating agent and ammonia gas are simultaneously passed into the nitriding furnace for rare earth co-production. Infiltration, control the gas volume ratio of ammonia gas to methanol or ethanol to be 1-2:1, the treatment time is 2-6 hours, and finally come out of the furnace and cool.
[0016] In this embodiment, the rare earth penetration agent accounts for 1 to 5% of the volume of the alcohol sol...
specific Embodiment approach 2
[0019] Specific implementation mode two: In this implementation mode, the rare earth penetration agent is composed of 3wt.% rare earth, 40wt.% ethylenediamine or formamide, 17%wt.% urea, 20%wt.% dihydroamine, 20wt.% composed of methanol or ethanol.
specific Embodiment approach 3
[0020] Specific embodiment three: In this embodiment, the rare earth penetrating agent is composed of 1wt.% rare earth, 30wt.% ethylenediamine or formamide, 20%wt.% urea, 19%wt.% dihydroamine, 30wt.% composed of methanol or ethanol.
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