Alloy steel gear resistant to fatigue pitting
An alloy steel, anti-fatigue technology, used in belts/chains/gears, components with teeth, portable lifting devices, etc., can solve the problems of plastic deformation or breakage of gear teeth, falling tooth surface, easy wear, etc. Achieve the effect of improving mechanical properties, toughness and fatigue strength, and improving service life
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Embodiment 1
[0018] A kind of anti-fatigue pitting alloy steel gear, the composition of the gear and its weight percentage are: C 0.2%, Si 0.7%, Mn0.125%, Cr 0.01%, W 0.015%, S 0.1%, P 0.25%, Zn 0.015%, Ti 0.015%, the rest is Fe with metallographic structure of ferrite + ledeburite and unavoidable impurities.
Embodiment 2
[0020] A kind of anti-fatigue pitting alloy steel gear, the composition and weight percentage of the gear are: C 4.3%, Si 1.2%, Mn0.25%, Cr 0.03%, W 0.125%, S 0.2%, P 0.35%, Zn 0.025%, Ti 0.018%, the rest is Fe with metallographic structure of ferrite + ledeburite and unavoidable impurities.
Embodiment 3
[0022] An alloy steel gear anti-fatigue pitting, the composition and weight percentage of the gear are: C 2.11%, Si 0.8%, Mn0.125%, Cr 0.01-0.03%, W 0.015-0.125%, S 0.1-0.2 %, P 0.25-0.35%, Zn 0.015-0.025%, Ti 0.015-0.018%, and the rest are Fe with metallographic structure of ferrite + ledeburite and unavoidable impurities.
[0023] The composition of the invention is novel, and the manufacturing process is reasonable and clear. In order to improve the surface hardness of the gear, the surface carburizing treatment is carried out after the gear is formed, and the surface quenching treatment is carried out after the carburization is completed, which improves the hardness of the gear teeth and the surface strength of the gear teeth, and reduces The wear of the tooth surface is reduced, and the internal mechanical properties of the gear are improved through normalizing and tempering treatment, and its toughness and fatigue strength have been greatly improved. After the entire heat...
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