A preparation method of in-situ synthesis of multi-component multi-scale carbide reinforced iron-based wear-resistant coating
An in-situ synthesis and wear-resistant coating technology, which is applied in the field of wear-resistant coatings, can solve problems such as the mismatch between the reinforcing phase and the wear resistance of the substrate, and achieve the effects of simple and convenient equipment, good compatibility, and large specific surface area
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[0039] Process the substrate into a tool or mold that meets the requirements of use, and clean the grease on the surface with acetone; if the substrate is remanufactured as a failed component, it needs to be sandblasted on the surface, and the grease on the surface is cleaned with acetone; A good substrate is put into the workpiece table and fixed.
[0040] The following three examples are used to complete the preparation of the in-situ synthesis of multiple multi-scale and multi-scale carbide composite reinforced coatings on the surface of the substrate:
Embodiment 1
[0042] 40% W powder (W≥99.8%, particle size 100~150μm), 15% Cr powder (Cr≥99.0%, particle size 120~200μm), 0.45% Ti powder (Ti≥99.0; Fe≤0.25%; Si ≤0.1%; O≤0.65%, particle size 100~200μm), 5.2% C powder (C≥98%, particle size 80~150μm), the balance is Fe-Ni self-fluxing alloy powder (Ni=30%; Re =1%; Fe=69%, particle size is 100~200μm) dried and mixed evenly and loaded into the powder feeder; preheat the substrate, the preheating temperature is 150~200℃; prepare the coating by plasma cladding process , the process parameters are: arc current 70~90A, voltage 38~46V, mixed powder feeding speed 15~20g / min, ion gas flow 6~8L / min, powder feeding gas flow 3~5L / min, shielding gas flow 6~8L / min, cladding speed 45~60mm / min; while the coating is being prepared, a high-temperature aluminum silicate ceramic fiber blanket is used to keep the reaction molten pool warm. The high-temperature ceramic fiber blanket is made of high-temperature aluminum silicate ceramic fiber with a thickness of 30...
Embodiment 2
[0045] 35% W powder (W≥99.8%, particle size 100~150μm), 20% Cr powder (Cr≥99.0%, particle size 120~200μm), 0.3% Ti powder (Ti≥99.0%; Fe≤0.25%; Si≤0.1%; O≤0.65%, particle size 100~200μm), 5.8% C powder (C≥98%, particle size 80~150μm), the balance is Fe-Ni self-fluxing alloy powder (Ni=30%; Re=1%; Fe=69%, the particle size is 100~200μm) dried and mixed evenly, then loaded into the powder feeder; the substrate is preheated, the preheating temperature is 150~200℃; the coating is prepared by plasma cladding process Layer, the process parameters are: arc current 70~90A, voltage 38~46V, mixed powder feeding speed 15~20g / min, ion gas flow 6~8L / min, powder feeding gas flow 3~5L / min, shielding gas The flow rate is 6~8L / min, and the cladding speed is 45~60mm / min; while the coating is being prepared, a high-temperature aluminum silicate ceramic fiber blanket is used to keep the reaction molten pool warm.
[0046] The obtained TiC-WC-M 7 C 3 Composite reinforced iron-based coatings were...
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