A multi-start thread based on carbonitriding technology and its preparation method
A technology of carbonitriding and multi-start threads, which is applied in the field of thread materials, can solve the problems of thin carbonitriding layer, high friction, and low strength, and achieve good corrosion and wear resistance, reduced wear damage, and high strength. Effect
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Embodiment 1
[0025] (1) Select a metal wire with a smooth and round surface, first undergo an annealing treatment at 500°C, and then undergo wire drawing and cold heading processes to obtain a metal component, and then perform thread rolling on the component to obtain a multi-threaded thread; (2), the The multi-start thread obtained after rolling is polished with 1200 mesh sandpaper, and the surface roughness is 0.05 μm, and then the surface is cleaned with absolute ethanol and acetone to remove oil stains, and then the multi-start thread whose surface is degreased is at a temperature of 450 ° C in methane : Hydrogen: nitrogen = 5: 15: 80 mixed gas atmosphere composed of plasma co-infiltration for 2 hours, the pressure is 250Pa; then keep the pressure constant, the mixed gas ratio becomes methane: hydrogen: nitrogen = 15: 5: 80, plasma Co-infiltration for 1 hour; then keep the pressure constant, the mixed gas ratio becomes methane: hydrogen = 60: 40, plasma co-infiltration for 0.5 hour, the...
Embodiment 2
[0027] (1) Select a metal wire with a smooth and round surface, first undergo an annealing treatment at 500°C, and then undergo wire drawing and cold heading processes to obtain a metal component, and then perform thread rolling on the component to obtain a multi-threaded thread; (2), the The multi-start thread obtained after thread rolling is polished with 1200 mesh sandpaper, and the surface roughness is 0.06 μm, and then the surface is cleaned with absolute ethanol and acetone to remove oil stains, and then the multi-start thread whose surface is degreased is at a temperature of 500 ° C in methane : Hydrogen: nitrogen = 5: 15: 80 mixed gas atmosphere composed of plasma co-infiltration for 2 hours, the pressure is 250Pa; then keep the pressure constant, the mixed gas ratio becomes methane: hydrogen: nitrogen = 15: 5: 80, plasma Co-infiltration for 1 hour; then keep the pressure constant, the mixed gas ratio becomes methane: hydrogen = 60: 40, plasma co-infiltration for 0.5 ho...
Embodiment 3
[0029]1. Select a metal wire with a smooth and round surface, firstly undergo annealing treatment at 500°C, and then go through wire drawing and cold heading processes to obtain metal components, and then perform thread rolling on the components to obtain multi-thread threads; (2) After the thread rolling The multi-start thread obtained is polished with 1200 mesh sandpaper, and the surface roughness is 0.08 μm, then the surface is cleaned with absolute ethanol and acetone to remove oil stains, and then the multi-start thread whose surface is degreased is at a temperature of 550 ° C, in methane: hydrogen: Plasma co-infiltration under the mixed gas atmosphere of nitrogen=5:15:80 for 2 hours, the pressure is 250Pa; then keep the pressure constant, the ratio of mixed gas becomes methane:hydrogen:nitrogen=15:5:80, plasma co-infiltration 1 Then keep the pressure constant, the mixed gas ratio becomes methane: hydrogen = 60: 40, plasma infiltration 0.5 hour, the carbonitriding layer th...
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Abstract
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