A kind of surfacing welding method of nitrogen-enhanced iron-based wear-resistant coating
A wear-resistant coating, iron-based technology, applied in the field of surfacing, can solve the problems of low hardness of the surfacing layer, low metal nitrogen content of the surfacing layer, small and uneven distribution of the volume fraction of the wear-resistant hard phase, and achieve surface forming. Good performance, no pores, efficient transition effect
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specific Embodiment approach 1
[0023] Specific implementation mode one: The surfacing welding method of nitrogen-enhanced iron-based wear-resistant coating in this embodiment is carried out according to the following steps:
[0024] 1. Clean the rust and oil on the surface of the substrate, and put the substrate into the workbench of the surfacing welding machine;
[0025] 2. Pass the welding wire into the nozzle of the welding machine, use nitrogen as the protective gas, and the nitrogen flow rate is 15-20L min -1 , turn on the welding power supply, a high-temperature nitrogen arc is triggered between the welding wire and the base material, and at the same time, the alloy powder for surfacing welding is sent to the high-temperature nitrogen arc area through the nozzle of the welding machine for surfacing welding; the welding current is 140-260A, and the welding voltage 22~28V, the flow rate of powder feeding air is 0.8m 3 h -1 , the powder feeding speed is 50~60g / min;
[0026] The nozzle of the welding ...
specific Embodiment approach 2
[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the base material in step 1 is carbon structural steel, and the carbon structural steel is carbon structural steel Q235, carbon structural steel 45 or carbon structural steel Structural steel 65Mn. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the nitrogen gas described in step 2 is industrial nitrogen with a purity of 99.5%. Others are the same as in the first or second embodiment.
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